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Section 1: 424B5 (424B5)


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Filed Pursuant to Rule 424(b)(5)
Registration No. 333-213285

        The shares of common stock included in this prospectus supplement consist of unsold shares of common stock for which a registration fee was previously paid in connection with the prospectus supplement filed by the registrant pursuant to Rule 424(b)(5) on August 8, 2018. Such registration fee will continue to apply to such unsold shares.


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Prospectus Supplement
to Prospectus dated August 24, 2016

$125,000,000

LOGO

TIER REIT, INC.

Common Stock



          On August 8, 2018, we entered into sales agreements in connection with our "at the market" equity offering program with each of Jefferies LLC, BMO Capital Markets Corp., JMP Securities LLC, J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC, collectively, the existing sales agreements, pursuant to which we may offer and sell shares of our common stock, $0.0001 par value per share, having an aggregate gross sales price of up to $125,000,000 from time to time. Under the existing sales agreements, we have offered and sold shares of our common stock having an aggregate gross sales price of $37,988,373.10 through the date of this prospectus supplement pursuant to a previous prospectus supplement dated August 8, 2018 and accompanying prospectus. As a result of such prior sales, shares of our common stock having an aggregate gross sales price of approximately $87,011,626.90 remain unsold under the existing sales agreements as of the date of this prospectus supplement. On November 5, 2018, we entered into a sales agreement with Robert W. Baird & Co. Incorporated, together with the existing sales agreements, the sales agreements, and simultaneously amended the existing sales agreements to add Robert W. Baird & Co. Incorporated as a sales agent and to provide for the sale of shares of our common stock having an aggregate gross sales price of up to $87,011,626.90 that remain unsold from time to time. In this prospectus supplement, we refer to each of Jefferies LLC, BMO Capital Markets Corp., JMP Securities LLC, J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, Robert W. Baird & Co. Incorporated and Wells Fargo Securities, LLC, as a sales agent and collectively as the sales agents. This prospectus supplement covers the offer and sale of such unsold shares and supersedes and replaces our prospectus supplement, dated August 8, 2018. Any sales pursuant to this prospectus supplement and the accompanying prospectus will be made in accordance with the terms of sales agreements between the Company and each of the sales agents.

          Sales of the shares of our common stock, if any, under this prospectus supplement and the accompanying prospectus may be made in negotiated transactions, which may include block trades, or transactions that are deemed to be "at the market" offerings as defined in Rule 415 under the Securities Act of 1933, as amended, or the Securities Act, including sales made directly on the New York Stock Exchange, or NYSE, or any other existing trading market for our common stock. The sales agents are not required, individually or collectively, to sell any specific number or dollar amount of shares of common stock, but upon acceptance of a placement notice from us and subject to the terms and conditions of the applicable sales agreement, each sales agent, if acting as an agent, will use its commercially reasonable efforts consistent with its normal trading and sales practices to sell our shares of common stock up to the amount specified, and otherwise in accordance with the terms set forth in such placement notice.

          Each sales agent will receive from us a commission that will not exceed, but may be lower than, 2.0% of the gross sales price of all shares sold through it as sales agent under the applicable sales agreement. In connection with the sale of shares of common stock on our behalf, the sales agents may be deemed to be "underwriters" within the meaning of the Securities Act, and the compensation paid to the sales agents may be deemed to be underwriting commissions or discounts.

          We may also sell some or all of the shares of common stock to a sales agent as principal for its own account at prices agreed upon at the time of sale.

          We are organized and conduct our operations to qualify as a real estate investment trust, or REIT, for federal income tax purposes. To assist us in qualifying as a REIT, our charter provides certain restrictions on the ownership of our common stock. For more information, see "Description of Common Stock of TIER REIT, Inc.—Restrictions on Ownership and Transfer" in the accompanying prospectus.

          Our common stock is listed on the NYSE under the symbol "TIER." The last reported sale price of our common stock on the NYSE on November 2, 2018 was $21.89 per share.

          Investing in our common stock involves risks. You should read carefully and consider "Risk Factors" included in our Annual Report on Form 10-K for the year ended December 31, 2017, and on page S-5 of this prospectus supplement before investing in our common stock.



          None of the Securities and Exchange Commission, any state securities commission, nor any other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is a criminal offense.



Jefferies   Baird   BMO Capital
Markets
  BofA Merrill
Lynch
  JMP Securities   J.P.
Morgan
  Wells Fargo
Securities



Prospectus Supplement dated November 5, 2018.


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        You should rely only on the information contained or incorporated by reference into this prospectus supplement and the accompanying prospectus. We have not, and the sales agents have not, authorized anyone to provide any information or to make any representations other than those contained or incorporated by reference in this prospectus supplement, the accompanying prospectus or in any free writing prospectus we have prepared. We and the sales agents take no responsibility for, and provide no assurance as to the reliability of, any other information that others may give you. This prospectus supplement and the accompanying prospectus are an offer to sell only the shares offered hereby, but only under circumstances and in jurisdictions where it is lawful to do so. The information contained in this prospectus supplement, the accompanying prospectus, the incorporated documents and any free writing prospectus is current only as of their respective dates.

        The distribution of this prospectus supplement and the accompanying prospectus and the offering of the common stock in certain jurisdictions may be restricted by law. If you possess this prospectus supplement and the accompanying prospectus, you should find out about and observe these restrictions. This prospectus supplement and the accompanying prospectus are not an offer to sell the common stock and are not soliciting an offer to buy the common stock in any jurisdiction where the offer or sale is not permitted or where the person making the offer or sale is not qualified to do so or to any person to whom it is not permitted to make such offer or sale.


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Prospectus Supplement

 
  Page  

ABOUT THIS PROSPECTUS SUPPLEMENT

    S-1  

FORWARD-LOOKING STATEMENTS

    S-1  

PROSPECTUS SUPPLEMENT SUMMARY

    S-3  

RISK FACTORS

    S-5  

USE OF PROCEEDS

    S-6  

SUPPLEMENTAL MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS

    S-7  

PLAN OF DISTRIBUTION

    S-9  

LEGAL MATTERS

    S-11  

EXPERTS

    S-11  

WHERE YOU CAN FIND MORE INFORMATION

    S-11  

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

    S-12  


Prospectus

 
  Page  

PROSPECTUS SUMMARY

    1  

RISK FACTORS

    3  

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

    3  

WHERE YOU CAN FIND MORE INFORMATION

    4  

INFORMATION INCORPORATED BY REFERENCE

    4  

USE OF PROCEEDS

    5  

DESCRIPTION OF COMMON STOCK OF TIER REIT, INC. 

    6  

DESCRIPTION OF PREFERRED STOCK OF TIER REIT, INC. 

    11  

DESCRIPTION OF STOCK PURCHASE CONTRACTS OF TIER REIT, INC. 

    12  

DESCRIPTION OF DEPOSITARY SHARES OF TIER REIT, INC. 

    13  

DESCRIPTION OF WARRANTS OF TIER REIT, INC. 

    16  

GLOBAL SECURITIES

    17  

MATERIAL PROVISIONS OF MARYLAND LAW AND OUR CHARTER AND BYLAWS

    18  

MATERIAL UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

    25  

PLAN OF DISTRIBUTION

    47  

LEGAL MATTERS

    49  

EXPERTS

    49  

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ABOUT THIS PROSPECTUS SUPPLEMENT

        This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering and also adds to and updates information in the accompanying prospectus and the documents incorporated by reference. The second part, the accompanying prospectus, gives more general information, some of which may not apply to this offering. You should read this entire document, including the prospectus supplement, the accompanying prospectus and the documents incorporated herein by reference. In the event that the description of this offering varies between this prospectus supplement and the accompanying prospectus, you should rely on the information contained in this prospectus supplement. To the extent the information included or incorporated by reference in this prospectus supplement differs or varies from the information included or incorporated by reference in the accompanying prospectus, the information included or incorporated by reference in this prospectus supplement updates and supersedes such information.

        This prospectus supplement and the accompanying prospectus contain, or incorporate by reference, forward-looking statements. Such forward-looking statements should be considered together with the cautionary statements and important factors included or referred to in this prospectus supplement, the accompanying prospectus and the documents incorporated herein by reference. Please see "Forward-Looking Statements" in this prospectus supplement and "Cautionary Statement Regarding Forward-Looking Statements" in the accompanying prospectus.

        Unless otherwise indicated or the context requires otherwise, in this prospectus supplement and the accompanying prospectus, references to "our company," "we," "us" and "our" mean TIER REIT, Inc. and its consolidated subsidiaries.


FORWARD-LOOKING STATEMENTS

        This prospectus supplement and the accompanying prospectus, including the documents incorporated by reference into this prospectus supplement and the accompanying prospectus, contain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. These forward-looking statements include discussion and analysis of the financial condition of TIER REIT, Inc. and our subsidiaries, including our ability to rent space on favorable terms, our ability to address debt maturities and fund our capital requirements, our intentions to acquire or sell certain properties, our intentions with respect to development activity, the value of our assets, our anticipated capital expenditures, the amount and timing of any anticipated future cash distributions to our stockholders and other matters. Words such as "may," "will," "anticipates," "expects," "intends," "plans," "believes," "seeks," "estimates," "would," "could," "should," "objectives," "strategies," "opportunities," "goals," "position," "future," "vision," "mission," "strive," "project" and variations of these words and similar expressions are intended to identify forward-looking statements.

        These forward-looking statements are not historical facts or guarantees of future performance, but reflect the intent, belief, or current expectations of our management based on their knowledge and understanding of our business and industry, the economy, and other future conditions. Actual results may differ materially from those expressed or forecasted due to a variety of risks and uncertainties, including but not limited to the factors listed and described under "Risk Factors" in this prospectus supplement, the accompanying prospectus and the documents incorporated herein by reference and the factors described below:

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        We undertake no obligation to update or revise our forward-looking statements, except as required by law. The risks included herein are not exhaustive, and you should be aware that there may be other factors that could adversely affect our business and financial performance. Moreover, new risk factors emerge from time to time and it is not possible for management to predict all risk factors, nor can we assess the impact of all risk factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.

        Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results. Investors should also refer to our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K that are incorporated herein by reference, including those filed with the SEC in the future, for a discussion of risks and uncertainties that may cause actual results, performance or achievements to differ materially from those expressed or implied by our forward-looking statements.

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PROSPECTUS SUPPLEMENT SUMMARY

        This summary highlights selected information from this prospectus supplement, the accompanying prospectus and the documents incorporated by reference. It does not contain all of the information that may be important to you. We encourage you to carefully read this entire prospectus supplement, the accompanying prospectus and the documents incorporated by reference, especially the "Risk Factors" section on page S-5 of this prospectus supplement, in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed with the SEC on February 12, 2018, and in our other public filings before making an investment decision regarding our common stock.

Overview

        We are a publicly traded (NYSE: TIER), self-managed, Dallas-based real estate investment trust focused on owning quality, well-managed commercial office properties in dynamic markets throughout the U.S. Our vision is to be the premier owner and operator of best-in-class office properties in TIER1 submarkets, which are primarily higher density and amenity-rich locations within select high-growth metropolitan areas that offer a walkable experience to various amenities. Our mission is to provide unparalleled, TIER ONE Property Services to our tenants and outsized total return through stock price appreciation and dividend growth to our stockholders. TIER REIT, Inc. was incorporated in June 2002 as a Maryland corporation and has elected to be treated, and currently qualifies, as a REIT for federal income tax purposes. As of September 30, 2018, we owned interests in 18 operating office properties and three development properties. Our operating properties are located in six markets throughout the United States.

        Substantially all of our business is conducted through Tier Operating Partnership LP, or Tier OP, a Texas limited partnership. Our wholly-owned subsidiary, Tier GP, Inc., a Delaware corporation, is the sole general partner of Tier OP. Our direct and indirect wholly-owned subsidiaries, Tier Business Trust, a Maryland business trust, and Tier Partners, LLC, a Delaware limited liability company, are limited partners that together with Tier GP, Inc. own all of Tier OP.

        Our corporate offices are located at 5950 Sherry Lane, Suite 700, Dallas, Texas 75225, and our telephone number is (972) 483-2400. We maintain an internet site, www.tierreit.com, which contains additional information concerning TIER REIT, Inc. Information on our internet site is neither part of nor incorporated into this prospectus supplement or the accompanying prospectus.

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The Offering

Issuer

  TIER REIT, Inc., a Maryland corporation.

Common stock offered from time to time

 

Shares having an aggregate gross sales price of up to $125,000,000. Of those shares of our common stock, we have offered and sold shares of our common stock having an aggregate gross sales price of $37,988,373.10 through the date of this prospectus supplement pursuant to a previous prospectus supplement dated August 8, 2018 and accompanying prospectus. As a result, as of the date of this prospectus supplement, shares of our common stock having an aggregate gross sales price of up to $87,011,626.90 remain available for offer and sale pursuant to this prospectus supplement and the accompanying prospectus.

Use of proceeds

 

We will contribute the net proceeds from this offering to our operating partnership Tier OP, which subsequently intends to use the net proceeds of this offering for general corporate purposes, which may include future acquisitions, development, and repayment of indebtedness, including borrowings under our credit facility. Pending the use of the net proceeds as described above, we may invest the net proceeds in interest bearing short-term U.S. government and government agency securities which are consistent with our intention to maintain our qualification as a REIT. These initial investments are expected to provide a lower net return than we will seek to achieve from investments in office properties. See "Use of Proceeds" in this prospectus supplement.

New York Stock Exchange Symbol

 

TIER

Restrictions on ownership

 

To assist us in maintaining our qualification as a REIT, our charter provides that no person or entity may actually own or be deemed to own by virtue of the applicable constructive ownership provisions, more than 9.8% (in value or in number, whichever is more restrictive) of our outstanding common stock, or 9.8% in value of the aggregate of the outstanding shares of all classes and series of our stock. For more information, see "Description of Common Stock of TIER REIT, Inc.—Restrictions on Ownership and Transfer" beginning on page 7 of the accompanying prospectus.

Risk Factors

 

See "Risk Factors" on page S-5 of this prospectus supplement and in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed with the SEC on February 12, 2018, and our other public filings incorporated by reference into this prospectus supplement and the accompanying prospectus for information you should consider before buying our common stock.

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RISK FACTORS

        Investing in our common stock involves risks. Before purchasing the common stock offered by this prospectus supplement, you should carefully consider the information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus, including, without limitation, the risk factors incorporated by reference in this prospectus supplement and the accompanying prospectus from our Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 12, 2018, as well as the risks, uncertainties and additional information set forth in our Form 10-K generally and in our SEC reports on Form 10-Q, Form 8-K, and in the other documents that we file with the SEC, which are incorporated by reference in this prospectus supplement and the accompanying prospectus. For a description of these reports and documents, and information about where you can find them, see "Where You Can Find More Information" and "Incorporation of Certain Documents By Reference" in this prospectus supplement. The risks and uncertainties we discuss in this prospectus supplement, the accompanying prospectus, and in the documents incorporated by reference in this prospectus supplement and the accompanying prospectus are those that we currently believe may materially affect our company. Additional risks not presently known or that are currently deemed immaterial could also materially and adversely affect our financial condition, results of operations, business, and prospects. The trading price of our common stock could decline due to any of these risks and you may lose all or a part of your investment.

Future issuances or sales of our common stock may depress the market price of our common stock and have a dilutive effect to our existing stockholders, including purchasers in this offering.

        We expect that we will issue shares of common stock in this offering with a maximum gross sales price of $87,011,626.90. The issuance of new shares in this offering could have the effect of depressing the market price for shares of our common stock.

        We cannot predict whether future issuances of our common stock or the availability of shares for resale in the open market may depress the market price of our common stock. Future issuances or sales of a substantial number of shares of our common stock in the public market, or the issuance of our common stock in connection with property, portfolio, or business acquisitions, or the perception that such issuances or sales might occur, may cause the market price of our shares to decline. In addition, future issuances of our common stock may be dilutive to existing shareholders.

Future offerings of debt, which would be senior to our common stock upon liquidation, or preferred stock that may be senior to our common stock for purposes of dividend distributions or upon liquidation, may adversely affect the market price of our common stock.

        In the future, we may issue debt or preferred stock. Upon liquidation, holders of our debt securities and shares of preferred stock and lenders with respect to other borrowings will receive distributions of our available assets prior to the holders of our common stock. Additional equity offerings, including offerings of convertible preferred stock, may dilute the holdings of our existing stockholders or otherwise reduce the market price of our common stock, or both. Holders of our common stock are not entitled to preemptive rights or other protections against dilution. Our preferred stock, if issued, could have a preference on liquidating distributions or a preference on distribution payments that could limit our ability to make distributions to holders of our common stock. Because our decision to issue securities in any future offering will depend on market conditions and other factors beyond our control, we cannot predict or estimate the amount, timing, or nature of our future offerings. Thus, our stockholders bear the risk of our future offerings reducing the market price of our common stock and diluting their stock holdings in us.

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USE OF PROCEEDS

        We will contribute the net proceeds from this offering to our operating partnership, Tier OP, which subsequently intends to use the net proceeds from any sale of shares of our common stock in this offering for general corporate purposes, which may include future acquisitions, development, and repayment of indebtedness, including borrowings under our credit facility. Pending the use of the net proceeds as described above, we may invest the net proceeds in interest bearing short-term U.S. government and government agency securities which are consistent with our intention to maintain our qualification as a REIT. These initial investments are expected to provide a lower net return than we will seek to achieve from investments in office properties.

        Our credit facility is unsecured and provides for total borrowings of up to $900.0 million, subject to our compliance with certain financial covenants. The facility consists of a $300.0 million term loan, a $275.0 million term loan, and a $325.0 million revolving line of credit. The $300.0 million term loan matures on January 17, 2025. The $275.0 million term loan matures on June 30, 2022. The revolving line of credit matures on January 18, 2022, and can be extended one additional year subject to certain conditions and payment of an extension fee. The annual interest rate on the credit facility is equal to either, at our election, (1) the "base rate" (calculated as the greatest of (i) the agent's "prime rate"; (ii) 0.5% above the Federal Funds Effective Rate; or (iii) the LIBOR Market Index Rate plus 1.0%) plus the applicable margin or (2) LIBOR for an interest period of one, three, or six months plus the applicable margin. The applicable margin will be determined based on the ratio of total indebtedness to total asset value and ranges from 10 basis points to 235 basis points. We have entered into interest rate swap agreements to hedge interest rates on $525.0 million of these borrowings to manage our exposure to future interest rate movements. All amounts owed are guaranteed by us and certain subsidiaries of Tier OP. As of September 30, 2018, we had approximately $575.0 million in borrowings outstanding under the term loans and $16.0 million in borrowings outstanding under the revolving line of credit with the ability, subject to our most restrictive financial covenants, to borrow an additional approximately $304.6 million under the facility as a whole. As of September 30, 2018, the weighted average effective interest rate for borrowings under the credit facility as a whole, inclusive of our interest rate swaps, was approximately 3.48%.

        An affiliate of J.P. Morgan Securities LLC is a lender, joint lead arranger, joint bookrunner and syndication agent under our credit facility. An affiliate of Wells Fargo Securities, LLC is the administrative agent and a lender under our credit facility, and Wells Fargo Securities, LLC is a joint lead arranger and joint bookrunner under our credit facility. Affiliates of BMO Capital Markets Corp. and Merrill Lynch, Pierce, Fenner & Smith Incorporated are lenders under our credit facility, and BMO Capital Markets Corp. and an affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated are senior managing agents under our credit facility. In connection with their participation in our credit facility, BMO Capital Markets Corp., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC or their respective affiliates receive customary syndication fees. In addition, to the extent that we use any of the net proceeds of this offering to repay borrowings outstanding under our credit facility, affiliates of BMO Capital Markets Corp., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC will each receive its proportionate share of such repayment.

        See "Plan of Distribution" in this prospectus supplement.

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SUPPLEMENTAL MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS

        This summary supplements and should be read together with the general discussion of the material United States federal income tax considerations associated with an investment in our capital stock described in the accompanying prospectus under the title "Material United States Federal Income Tax Considerations." To the extent any information set forth under the title "Material United States Federal Income Tax Considerations" in the accompanying prospectus is inconsistent with this supplemental information, this supplemental information will apply and supersede the information in the accompanying prospectus. This supplemental information is provided on the same basis and subject to the same qualifications as are set forth in the second and third paragraphs under the title "Material United States Federal Income Tax Considerations" in the accompanying prospectus as if those paragraphs were set forth in this supplement.

Tax Cuts and Jobs Act

        On December 22, 2017, H.R. 1, known as the "Tax Cuts and Jobs Act" (the "TCJA"), was signed into law. The provisions of the TCJA generally apply to taxable years beginning after December 31, 2017. Significant provisions of the TCJA that investors should be aware of include provisions that:

        In addition, the TCJA limits the deduction for net interest expense incurred by a business to 30% of the "adjusted taxable income" of the taxpayer. However, the limitation on the interest expense deduction does not apply to electing real property trades or businesses, such as any real property development, redevelopment, construction, reconstruction, acquisition, conversion, rental, operation, management, leasing, or brokerage trade or business. Making the election to be treated as a real property trade or business requires the electing real property trade or business to depreciate non-residential real property, residential rental property, and qualified improvement property over a longer period using the alternative depreciation system. We generally will decide whether to make any available election to treat as a real property trade or business any direct or indirect investment made through an entity that we control.

        Stockholders are urged to consult with their own tax advisors with respect to the impact that the TCJA and other legislation may have on their investment and the status of legislative, regulatory or administrative developments and proposals and their potential effect on their investment in our stock.

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Consolidated Appropriations Act, 2018

        On March 23, 2018, President Donald J. Trump signed into law the Consolidated Appropriations Act, 2018 (the "CAA"), which amended various provisions of the Internal Revenue Code of 1986, as amended (the "Code"), and implicates certain tax-related disclosures contained in the accompanying prospectus. As a result, the discussion on pages 44 to 45 of the accompanying prospectus in the third and fourth paragraphs under "Taxation of Stockholders and Potential Tax Consequences of Their Investment in Shares of Common Stock or Preferred Stock—U.S. Taxation of Non—U.S. Stockholders—Dispositions of Stock" is replaced with the following paragraphs:

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        The CAA also amended numerous Code provisions relating to the new rules applicable to federal income tax audits of partnerships effective for taxable years beginning after December 31, 2017, to provide that a broader range of partnership-related items may be adjusted on audit or in other tax proceedings.

        Finally, the CAA clarified that for purposes of determining whether a REIT is a "domestically controlled qualified investment entity" under FIRPTA, the presumption that generally a person holding less than 5% of a REIT's class of stock that is regularly traded on an established securities market in the United States for five years has been, and will be, treated as a U.S. person applies for testing periods ending on or after December 18, 2015 (e.g., if a testing period ended on June 1, 2018, then the presumption applies for the entire five-year period starting on June 1, 2013).

PLAN OF DISTRIBUTION

        On August 8, 2018, we entered into sales agreements in connection with our "at the market" equity offering program with each of Jefferies LLC, BMO Capital Markets Corp., JMP Securities LLC, J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC, collectively, the existing sales agreements, pursuant to which we may offer and sell shares of our common stock having an aggregate gross sales price of up to $125,000,000 from time to time. Under the existing sales agreements, we have offered and sold shares of our common stock having an aggregate gross sales price of $37,988,373.10 through the date of this prospectus supplement pursuant to a previous prospectus supplement dated August 8, 2018 and accompanying prospectus. As a result of such prior sales, shares of our common stock having an aggregate gross sales price of approximately $87,011,626.90 remain unsold under the existing sales agreements as of the date of this prospectus supplement. On November 5, 2018, we entered into a sales agreement with Robert W. Baird & Co. Incorporated, together with the existing sales agreements, the sales agreements, and simultaneously amended the existing sales agreements to add Robert W. Baird & Co. Incorporated as a sales agent and to provide for the sale of shares of our common stock having an aggregate gross sales price of up to $87,011,626.90 that remain unsold from time to time.

        Sales of our shares of common stock, if any, under this prospectus supplement and the accompanying prospectus may be made in negotiated transactions, which may include block trades, or transactions that are deemed to be "at the market" offerings as defined in Rule 415 under the Securities Act, including sales made directly on the NYSE or any other existing trading market for our common stock. As an agent, none of the sales agents will engage in any transactions that stabilize the price of our common stock.

        The offering of the shares by the sales agents is subject to receipt and acceptance and subject to the sales agents' right to decline any order in whole or in part. Upon its acceptance of a placement notice from us, each sales agent, if acting as agent, will use its commercially reasonable efforts consistent with its normal sales and trading practices and applicable state and federal laws, rules and regulations, and the rules of the NYSE to sell our shares of common stock up to the amount specified, and in accordance with the terms and subject to the conditions set forth in the applicable sales agreement and such placement notice. The placement notice that we deliver will set forth the number of shares to be issued, the time period during which sales are requested to be made, any limitation on the number of shares that may be sold in any one day, and any minimum price below which sales may not be made. Our shares of common stock sold pursuant to the sales agreements will be sold through only one of the sales agents on any given day. We or any of the sales agents may suspend the sale of shares of common stock upon proper notice and subject to other conditions.

        The relevant sales agent will provide written confirmation to us no later than the opening of the trading day on the NYSE on the day following the trading day in which our shares of common stock were sold under the applicable sales agreement. Each confirmation will include the number of shares

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sold on such day, the prices at which such shares were sold, the gross proceeds from such sales, the compensation payable by us to the sales agent in connection with the sales and the net proceeds to us.

        We will pay each sales agent commissions for its services in acting as agent and/or principal in the sale of shares of common stock. Each sales agent will be entitled to compensation that will not exceed, but may be lower than, 2.0% of the gross proceeds from the sales of common stock sold through it as sales agent pursuant to the terms of the applicable sales agreement. We estimate that the total expenses for the offering, excluding compensation payable to the sales agents under the terms of the sales agreements, will be approximately $200,000. We have agreed, under certain circumstances, to reimburse the sales agents for certain of their expenses incurred in connection with the sales agreements up to $100,000.

        We may also sell some or all of the shares of common stock to a sales agent as principal for its own account at a price agreed upon at the time of sale.

        Settlement for sales of shares of common stock generally will occur on the third trading day (or such earlier day as is industry practice for regular-way trading) following the date on which any sales are made, unless some other date is specified in the applicable placement notice, in return for payment of the net proceeds to us. There is no arrangement for funds to be received in an escrow, trust, or similar arrangement.

        We will report at least quarterly the number of shares of common stock sold through the sales agents under the sales agreements, the net proceeds to us and the compensation paid by us to the sales agents in connection with the sales of shares of common stock.

        In connection with the sale of shares of common stock on our behalf, each of the sales agents may be deemed to be an "underwriter" within the meaning of the Securities Act, and the compensation of the sales agents may be deemed to be underwriting commissions or discounts. We have agreed to indemnify the several sales agents against specified liabilities, including liabilities under the Securities Act, or to contribute to payments that the sales agents may be required to make because of those liabilities.

        The offering of our shares of common stock under any sales agreement will terminate upon the termination of such sales agreement by the applicable sales agent or us in accordance with its terms.

        The sales agents and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities. Certain of the sales agents and their respective affiliates have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for the company, for which they received or will receive customary fees and expenses.

        In the ordinary course of their various business activities, the sales agents and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers, and such investment and securities activities may involve securities and/or instruments of the company. The sales agents and their respective affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or instruments and may at any time hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

        An affiliate of J.P. Morgan Securities LLC is a lender, joint lead arranger, joint bookrunner and syndication agent under our credit facility. An affiliate of Wells Fargo Securities, LLC is the administrative agent and a lender under our credit facility, and Wells Fargo Securities, LLC is a joint lead arranger and joint bookrunner under our credit facility. Affiliates of BMO Capital Markets Corp.

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and Merrill Lynch, Pierce, Fenner & Smith Incorporated are lenders under our credit facility, and BMO Capital Markets Corp. and an affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated are senior managing agents under our credit facility. In connection with their participation in our credit facility, BMO Capital Markets Corp., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC or their respective affiliates receive customary syndication fees. In addition, to the extent that we use any of the net proceeds of this offering to repay borrowings outstanding under our credit facility, affiliates of BMO Capital Markets Corp., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC will each receive its proportionate share of such repayment.

        The current business of Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S") is being reorganized into two affiliated broker-dealers (i.e., MLPF&S and BofAML Securities, Inc.) in which BofAML Securities, Inc. will be the new legal entity for the institutional services that are now provided by MLPF&S. This transfer is expected to occur in 2019 (the "Transfer Date"). MLPF&S will be assigning its rights and obligations as sales agent to BofAML Securities, Inc. on the Transfer Date.

LEGAL MATTERS

        The validity of the common stock offered hereby and certain other legal matters will be passed upon for us by Goodwin Procter LLP. In addition, certain legal matters of Texas law with respect to Tier OP will be passed upon for us by Akin Gump Strauss Hauer & Feld LLP. Certain legal matters will be passed upon for the sales agents by Latham & Watkins LLP.

EXPERTS

        The consolidated financial statements, and the related financial statement schedules, incorporated in this prospectus supplement by reference from TIER REIT, Inc.'s Annual Report on Form 10-K, and the effectiveness of TIER REIT, Inc.'s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports (which report expresses an unqualified opinion on those consolidated financial statements and financial statement schedules and includes an explanatory paragraph regarding the early adoption of Financial Accounting Standards Board Accounting Standards Update No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business and the 2015 adoption of Financial Accounting Standards Board Accounting Standards Update No. 2014-08, Presentation of Financial Statements and Property, Plant, and Equipment (Topics 205 and 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity), which are incorporated herein by reference. Such consolidated financial statements and financial statement schedules have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

WHERE YOU CAN FIND MORE INFORMATION

        We are subject to the informational requirements of the Exchange Act, and in accordance with the Exchange Act, we file annual, quarterly, and current reports, proxy statements, and other information with the SEC. Our SEC filings are available to the public from the SEC's website at http://www.sec.gov. We have a website located at http://www.tierreit.com. Our website and the information contained therein or connected thereto are not incorporated into this prospectus supplement or the accompanying prospectus.

        We have filed with the SEC a registration statement on Form S-3 (File No. 333-213285) under the Securities Act with respect to the shares of common stock offered by this prospectus supplement. This prospectus supplement, which forms a part of the registration statement, does not contain all of the information set forth in the registration statement and its exhibits and schedules, certain parts of which are omitted in accordance with the SEC's rules and regulations. For further information about us and

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the shares of common stock offered hereby, we refer you to the registration statement and to such exhibits and schedules. You may review a copy of the registration statement through the SEC's website. Please be aware that statements in this prospectus supplement or the accompanying prospectus referring to a contract or other document are summaries and you should refer to the exhibits that are part of the registration statement for a copy of the contract or document.

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

        SEC rules allow us to incorporate by reference information into this prospectus supplement. This means that we can disclose important information to you by referring you to another document. Any information referred to in this way is considered part of this prospectus supplement from the date we file that document. We incorporate by reference into this prospectus supplement the following documents or information filed with the SEC (other than, in each case, documents or information deemed to have been furnished and not filed in accordance with SEC rules):

        All documents that we file (but not those that we furnish) pursuant to Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act on or after the date of this prospectus supplement and prior to the termination of the offering of the securities covered under this prospectus supplement shall be deemed to be incorporated by reference into this prospectus supplement and will automatically update and supersede the information in this prospectus supplement, the accompanying prospectus, and any previously filed documents.

        We will provide without charge to each person, including any beneficial owner, to whom this prospectus supplement is delivered, upon his or her written or oral request, a copy of any or all documents referred to above that have been or may be incorporated by reference into this prospectus supplement, excluding exhibits to those documents unless they are specifically incorporated by reference into those documents. Requests for those documents should be directed to us as follows: TIER REIT, Inc., 5950 Sherry Lane, Suite 700, Dallas, TX 75225, Attention: Investor Relations, Telephone: (972) 483-2400.

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Prospectus

LOGO

TIER REIT, INC.

Common Stock
Preferred Stock
Stock Purchase Contracts
Depositary Shares
Warrants

        TIER REIT, Inc. may offer to sell from time to time common stock, preferred stock, stock purchase contracts, and warrants. The preferred stock of TIER REIT, Inc. may be sold separately or represented by depositary shares and may be convertible into common stock or preferred stock of another series.

        The common stock, preferred stock, stock purchase contracts, depositary shares and warrants of TIER REIT, Inc. may be offered separately or together, in multiple series, in amounts, at prices and on terms that will be set forth in one or more prospectus supplements to this prospectus.

        This prospectus describes some of the general terms that may apply to these securities and the general manner in which they may be offered. Each time TIER REIT, Inc. sells securities, a prospectus supplement will be provided that will contain specific information about the terms of any securities offered and the specific manner in which the securities will be offered. The prospectus supplement will also contain information, where appropriate, about material United States federal income tax considerations relating to, and any listing on a securities exchange of, the securities covered by the prospectus supplement. The prospectus supplement may add to, update or change the information in this prospectus. You should read this prospectus and any prospectus supplement carefully before you invest in our securities. This prospectus may not be used to sell securities unless accompanied by a prospectus supplement.

        TIER REIT, Inc. may offer the securities directly to investors, through agents designated from time to time by TIER REIT, Inc. or to or through underwriters or dealers. If any agents, underwriters or dealers are involved in the sale of any of the securities, their names, and any applicable purchase price, fee, commission or discount arrangement with, between or among them will be set forth, or will be calculable from the information set forth, in an accompanying prospectus supplement. For more detailed information, see "Plan of Distribution" in this prospectus.

        The common stock of TIER REIT, Inc. is listed on the New York Stock Exchange, or the NYSE, under the symbol "TIER." On August 22, 2016, the last reported sale price of our common stock on the NYSE was $16.23 per share.

        Investing in our securities involves various risks. See "Risk Factors" beginning on page 3 as well as the risk factors contained in documents we file with the Securities and Exchange Commission and which are incorporated by reference in this prospectus.

        Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

   

Prospectus dated August 24, 2016.


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TABLE OF CONTENTS

PROSPECTUS SUMMARY

    1  

RISK FACTORS

    3  

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

    3  

WHERE YOU CAN FIND MORE INFORMATION

    4  

INFORMATION INCORPORATED BY REFERENCE

    4  

USE OF PROCEEDS

    5  

DESCRIPTION OF COMMON STOCK OF TIER REIT, INC. 

    6  

DESCRIPTION OF PREFERRED STOCK OF TIER REIT,  INC. 

    11  

DESCRIPTION OF STOCK PURCHASE CONTRACTS OF TIER REIT, INC. 

    12  

DESCRIPTION OF DEPOSITARY SHARES OF TIER REIT,  INC. 

    13  

DESCRIPTION OF WARRANTS OF TIER REIT, INC. 

    16  

GLOBAL SECURITIES

    17  

MATERIAL PROVISIONS OF MARYLAND LAW AND OUR CHARTER AND BYLAWS

    18  

MATERIAL UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

    25  

PLAN OF DISTRIBUTION

    47  

LEGAL MATTERS

    49  

EXPERTS

    49  

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PROSPECTUS SUMMARY

About this Prospectus

        This prospectus is part of a "shelf" registration statement that we have filed under the Securities Act of 1933, as amended (the "Securities Act"), with the Securities and Exchange Commission (the "SEC"). By using a shelf registration statement, TIER REIT, Inc. is registering an unspecified amount of common stock, preferred stock, stock purchase contracts, depositary shares and warrants, and may sell such securities, at any time and from time to time, in one or more offerings.

        As used in this prospectus and the registration statement on Form S-3 of which this prospectus is a part, unless the context otherwise requires, the terms "we," "us," and "our" refer to TIER REIT, Inc., a Maryland corporation, individually or together with its subsidiaries, including Tier Operating Partnership LP, a Texas limited partnership. Tier Operating Partnership LP is the entity through which TIER REIT, Inc. conducts substantially all of its business. We sometimes refer to Tier Operating Partnership LP as "our operating partnership," and TIER REIT, Inc. as "our company" or "TIER."

        You should rely only on the information contained in this prospectus and the accompanying prospectus supplement or incorporated by reference in these documents. No dealer, salesperson or other person is authorized to give any information or to represent anything not contained or incorporated by reference in this prospectus or the accompanying prospectus supplement. If anyone provides you with different, inconsistent or unauthorized information or representations, you must not rely on them. This prospectus and the accompanying prospectus supplement are an offer to sell only the securities offered by these documents, but only under circumstances and in jurisdictions where it is lawful to do so. The information contained in this prospectus or any prospectus supplement is current only as of the date on the front of those documents.

About TIER REIT, Inc.

        TIER REIT, Inc. is a self-managed, Dallas-based real estate investment trust, or REIT, focused on delivering outsized stockholder return through stock price appreciation and dividend growth while offering unparalleled tenant service. Our investment strategy is to acquire, develop, and operate a portfolio of best-in-class office properties in select U.S. markets that consistently lead the nation in both population and office-using employment growth. Within these markets, we target TIER1 submarkets, which are primarily urban and amenity-rich locations. As of June 30, 2016, we owned interests in 32 operating office properties, two non-operating properties, and one development property located in 13 markets throughout the United States.

        Substantially all of our business is conducted through Tier Operating Partnership LP ("Tier OP"), a Texas limited partnership. Our wholly-owned subsidiary, Tier GP, Inc., a Delaware corporation, is the sole general partner of Tier OP. Our direct and indirect wholly-owned subsidiaries, Tier Business Trust, a Maryland business trust, and Tier Partners, LLC, a Delaware limited liability company, are limited partners that together with Tier GP, Inc. own all of Tier OP.

        TIER REIT, Inc. was incorporated in Maryland as a corporation in June 2002 and has elected to be treated, and currently qualifies, as a REIT for federal income tax purposes.

        Our principal executive offices are located at 5950 Sherry Lane, Suite 700, Dallas, Texas 75225 and our telephone number is (972) 483-2400.

        Additional information regarding TIER REIT, Inc., including audited financial statements and descriptions of TIER REIT, Inc., is contained in the documents incorporated by reference in this prospectus. See "Where You Can Find More Information."

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Ratios of Earnings to Combined Fixed Charges and Preferred Dividends

        The following table sets forth TIER REIT, Inc.'s historical ratios of earnings to combined fixed charges and preferred dividends for the periods indicated:

 
  Six
Months Ended
June 30,
2016
  Year Ended
December 31,
2015
  Year Ended
December 31,
2014
  Year Ended
December 31,
2013
  Year Ended
December 31,
2012
  Year Ended
December 31,
2011

Ratio of Earnings to Combined Fixed Charges and Preferred Dividends

  (A)   (A)   (A)   (A)   (A)   (A)

(A)
The coverage ratio was less than 1:1 in the periods presented. Combined fixed charges and preferred dividends exceeded earnings for the six months ended June 30, 2016 and the years ended December 31, 2015, 2014, 2013, 2012 and 2011 in the amounts (in thousands) of $22,767, $53,462, $78,747, $65,897, $155,996 and $108,459, respectively.

        The ratios of earnings to combined fixed charges and preferred dividends were computed by dividing earnings by combined fixed charges and preferred dividends on securities of TIER REIT, Inc. Earnings consist of loss from continuing operations before income taxes, equity in operations of investments and non-controlling interests, plus distributions from investments, amortization of capitalized interest and fixed charges, minus interest capitalized, preferred dividends of consolidated subsidiaries and non-controlling interest in pre-tax loss of subsidiaries that have not incurred fixed charges. Combined fixed charges and preferred dividends consist of interest expensed, including amortization, interest capitalized, interest within rental expense, preferred dividends of consolidated subsidiaries and preferred dividends on securities of TIER REIT, Inc.

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RISK FACTORS

        You should carefully consider the risks described in the documents incorporated by reference in this prospectus before making an investment decision. These risks are not the only ones facing our company. Additional risks not presently known to us or that we currently deem immaterial may also impair our business operations. Our business, financial condition or results of operations could be materially adversely affected by the materialization of any of these risks. The trading price of our securities could decline due to the materialization of any of these risks and you may lose all or part of your investment. This prospectus and the documents incorporated herein by reference also contain forward-looking statements that involve risks and uncertainties. Actual results could differ materially from those anticipated in these forward-looking statements as a result of certain factors, including the risks described in the documents incorporated herein by reference, including (i) our Annual Reports on Form 10-K, (ii) our Quarterly Reports on Form 10-Q and (iii) documents we file with the Securities and Exchange Commission, or SEC, after the date of this prospectus and which are deemed incorporated by reference in this prospectus.


CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

        Certain statements in this prospectus, including the information incorporated by reference into this prospectus, and any accompanying prospectus supplement, constitute "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act") and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). These forward-looking statements include discussion and analysis of the financial condition of TIER REIT, Inc. and our subsidiaries, including our ability to rent space on favorable terms, our ability to address debt maturities and fund our capital requirements, our intentions to sell certain properties, our intentions with respect to development activity, the value of our assets, our anticipated capital expenditures, the amount and timing of any anticipated future cash distributions to our stockholders and other matters. Words such as "may," "will," "anticipates," "expects," "intends," "plans," "believes," "seeks," "estimates," "would," "could," "should," "objectives," "strategies," "goals," and variations of these words and similar expressions are intended to identify forward-looking statements.

        These forward-looking statements are not historical facts but reflect the intent, belief, or current expectations of our management based on their knowledge and understanding of the business and industry, the economy, and other future conditions. These statements are not guarantees of future performance, and we caution stockholders not to place undue reliance on forward-looking statements. Actual results may differ materially from those expressed or forecasted due to a variety of risks and uncertainties, including but not limited to the factors listed and described under "Risk Factors" in this prospectus and the factors described below:

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        Forward-looking statements in this prospectus reflect our management's view only as of the date of this prospectus, and may ultimately prove to be incorrect or false. We undertake no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events, or changes to future operating results.

        The risks included herein are not exhaustive, and you should be aware that there may be other factors that could adversely affect our business and financial performance. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all risk factors, nor can we assess the impact of all risk factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results. Investors should also refer to our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K that are incorporated herein by reference, including those filed in the future for a discussion of risks and uncertainties that may cause actual results, performance or achievements to differ materially from those expressed or implied by forward-looking statements.


WHERE YOU CAN FIND MORE INFORMATION

        TIER REIT, Inc. is subject to the information requirements of the Exchange Act, and in accordance with the Exchange Act, we file annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any document we file at the SEC's Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may call the SEC at 1-800-SEC-0330 for further information on the operation of the Public Reference Room. Our SEC filings are also available to the public from the SEC's website at http://www.sec.gov.

        We have a website located at http://www.tierreit.com. The website and the information contained therein or connected thereto are not incorporated into this prospectus or any prospectus supplement.


INFORMATION INCORPORATED BY REFERENCE

        The SEC allows us to incorporate by reference the information we file with the SEC, which means that we can disclose important information to you by referring you to these documents. The information incorporated by reference is an important part of this prospectus, and information that we file later with the SEC will automatically update and supersede the information already incorporated by reference. The SEC file number of TIER REIT, Inc. is 001-37512. We are incorporating by reference the documents listed below, which we have already filed with the SEC:

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        All documents filed by TIER REIT, Inc. with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act on or after the date of this prospectus until the earlier of the date on which all of the securities registered hereunder have been sold or this registration statement has been withdrawn shall be deemed incorporated by reference in this prospectus and to be a part of this prospectus from the date of filing of those documents. Upon request, we will provide, without charge, to each person, including any beneficial owner, to whom a copy of this prospectus is delivered a copy of the documents incorporated by reference in this prospectus. You may request a copy of these filings, and any exhibits we have specifically incorporated by reference as an exhibit in this prospectus, by writing or telephoning us at the following:

TIER REIT, Inc.
5950 Sherry Lane, Suite 700
Dallas, TX 75225
Attention: Investor Relations
(972) 483-2400

        This prospectus is part of a registration statement we filed with the SEC. We have incorporated exhibits into the registration statement. You should read the exhibits carefully for provisions that may be important to you.

        You should rely only on the information incorporated by reference or provided in this prospectus or any prospectus supplement. We have not authorized anyone to provide you with different or additional information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information in this prospectus or in the documents incorporated by reference is accurate as of any date other than the date on the front of this prospectus or the date of the applicable documents.


USE OF PROCEEDS

        We intend to use the net proceeds from our sale of the securities covered by this prospectus for one or more of the following:

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DESCRIPTION OF COMMON STOCK OF TIER REIT, INC.

        The following is a summary of the material terms and provisions of TIER REIT, Inc. common stock. It may not contain all the information that is important to you. You can access complete information by referring to the charter and bylaws of TIER REIT, Inc. and the Maryland General Corporation Law, or MGCL. The charter and bylaws are incorporated by reference into this prospectus, and the following summary is qualified in its entirety by reference to such documents.

General

        Our charter provides that we may issue 382,499,000 shares of common stock, $0.0001 par value per share, 1,000 shares of non-participating, non-voting convertible stock, $0.0001 par value per share and 17,500,000 shares of preferred stock, $0.0001 par value per share. Subject to any preferential rights in favor of any class of preferred stock, our charter authorizes our board of directors, with the approval of a majority of the entire board of directors and without any action by our stockholders, to amend our charter to increase or decrease the aggregate number of authorized shares of stock or the number of authorized shares of any class or series of our stock. As of July 31, 2016, there were 47,746,054 shares of our common stock outstanding, and no shares of non-participating, non-voting convertible stock or shares of preferred stock issued and outstanding.

        Under Maryland law, our stockholders generally are not personally liable for our debts and obligations solely as a result of their status as stockholders.

Common Stock

        All of the shares of our common stock, when issued, will be duly authorized, validly issued, fully paid and nonassessable and all of the shares of our common stock have equal rights as to earnings, assets, dividends and voting. Subject to the preferential rights of holders of any other class or series of our stock, holders of shares of our common stock are entitled to receive dividends and other distributions on such shares if, as and when authorized by our board of directors and declared by us out of assets legally available therefor. Shares of our common stock generally have no preemptive, appraisal, preferential exchange, conversion, sinking fund or redemption rights and are freely transferable, except where their transfer is restricted by federal and state securities laws, by contract or by the restrictions in our charter. In the event of our liquidation, dissolution or winding up, each share of our common stock would be entitled to share ratably in all of our assets that are legally available for distribution after payment of or adequate provision for all of our known debts and other liabilities and subject to any preferential rights of holders of our preferred stock, if any preferred stock is outstanding at such time, and our charter restrictions on the transfer and ownership of our stock.

        Except as may otherwise be provided in the charter or specified in the terms of any class or series of our common stock, each outstanding share of our common stock entitles the holder to one vote on all matters submitted to a vote of stockholders, including the election of directors, and, except as may be provided in the charter or with respect to any other class or series of stock, the holders of shares of our common stock will possess the exclusive voting power. There is no cumulative voting in the election of our directors. Directors are elected by a plurality of all of the votes cast in the election of directors.

        Under Maryland law, a Maryland corporation generally cannot dissolve, amend its charter, merge, convert, consolidate, sell all or substantially all of its assets or engage in a statutory share exchange unless declared advisable by its board of directors and approved by the affirmative vote of stockholders entitled to cast at least two-thirds of all of the votes entitled to be cast on the matter unless a lesser percentage (but not less than a majority of all of the votes entitled to be cast on the matter) is set forth in the corporation's charter. Our charter provides for approval of any of these matters by the affirmative vote of stockholders entitled to cast a majority of all the votes entitled to be cast on such matters. Maryland law also permits a Maryland corporation to transfer all or substantially all of its

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assets without the approval of the stockholders of the corporation to an entity if all of the equity interests of the entity are owned, directly or indirectly, by the corporation. Because substantially all of our assets are held by our operating partnership or its subsidiaries, these subsidiaries may be able to merge or transfer all or substantially all of their assets without the approval of our stockholders.

Power to Reclassify Our Unissued Shares of Stock

        Our charter authorizes our board of directors to classify and reclassify any unissued shares of stock into other classes or series of stock, including preferred stock. Prior to the issuance of shares of each class or series, our board of directors is required by Maryland law and by our charter to set, subject to the provisions of our charter regarding the restrictions on ownership and transfer of our stock, the terms, the preferences, conversion or other rights, voting powers, restrictions, limitations as to dividends or other distributions, qualifications and terms or conditions of redemption of each such class or series. As a result, our board of directors could authorize the issuance of shares of preferred stock that have priority over shares of our common stock with respect to dividends or other distributions or rights upon liquidation or with other terms and conditions that could have the effect of delaying, deferring or preventing a transaction or a change of control of our company that might involve a premium price for holders of our common stock or that our common stockholders otherwise believe to be in their best interests. As of the date hereof, no shares of preferred stock are outstanding and we have no present plans to issue any shares of preferred stock.

Power to Increase or Decrease Authorized Shares of Stock and Issue Additional Shares of Common and Preferred Stock

        Our charter authorizes our board of directors to, without stockholder approval, amend our charter to increase or decrease the number of authorized shares of stock, to issue additional authorized but unissued shares of our common or preferred stock, and to classify and reclassify unissued shares of our common stock and preferred stock and thereafter to issue such classified or reclassified shares of stock. These charter provisions will provide us with increased flexibility in structuring possible future financings and acquisitions and in meeting other needs that might arise. The additional classes or series, as well as the additional authorized shares of our common stock, will be available for issuance without further action by our stockholders, unless such action is required by applicable law or the rules of any stock exchange or market system on which our securities may be listed or traded. Although our board of directors does not currently intend to do so, it could authorize us to issue a class or series of stock that could, depending upon the terms of the particular class or series, delay, defer or prevent a transaction or a change of control of our company that might involve a premium price for holders of our common stock or that our common stockholders otherwise believe to be in their best interests. See "Material Provisions of Maryland Law and Our Charter and Bylaws—Anti-Takeover Effect of Certain Provisions of Maryland Law and of Our Charter and Bylaws."

Restrictions on Ownership and Transfer

        In order for us to qualify as a REIT under the Internal Revenue Code of 1986, as amended (the "Code"), our stock must be beneficially owned by 100 or more persons during at least 335 days of a taxable year of 12 months or during a proportionate part of a shorter taxable year (other than the first year for which an election to be a REIT has been made). Also, not more than 50% of the value of the outstanding shares of our stock (after taking into account certain options to acquire shares of stock) may be owned, directly or indirectly or through application of certain attribution rules by five or fewer "individuals" (as defined in the Code to include certain entities, such as private foundations) at any time during the last half of a taxable year (other than the first taxable year for which an election to be a REIT has been made).

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        Our charter contains restrictions on the ownership and transfer of our stock that are, among other things, intended to assist us in complying with these requirements and to continue to qualify as a REIT. The relevant sections of our charter provide that, subject to the exceptions described below, no person or entity may actually own or be deemed to own by virtue of the applicable constructive ownership provisions, more than 9.8% (in value or in number, whichever is more restrictive) of our outstanding common stock, or 9.8% in value of the aggregate of the outstanding shares of all classes and series of our stock. We refer to each of these restrictions as an "ownership limit" and collectively as the "ownership limits." A person or entity that would have acquired actual, beneficial or constructive ownership of our stock but for the application of the ownership limits or any of the other restrictions on ownership and transfer of our stock discussed below, and, if appropriate in the context, any person or entity that would have been the record owner of such shares, is referred to as a "prohibited owner."

        The applicable constructive ownership rules under the Code are complex and, for instance, may cause stock owned actually or constructively by a group of related individuals and/or entities to be treated as owned constructively by one individual or entity. As a result, the acquisition of less than 9.8% in value of our outstanding stock or less than 9.8% in the value or number of our outstanding common stock (or the acquisition of an interest in an entity that owns, actually or constructively, our stock) by an individual or entity could nevertheless cause that individual or entity, or another individual or entity, to own, constructively or beneficially, in excess of 9.8% of our outstanding stock or in excess of 9.8% of our outstanding common stock and thereby violate the applicable ownership limit.

        Our charter provides that our board of directors may, prospectively or retroactively, waive the ownership limit with respect to a particular stockholder and establish or increase a different limit on ownership for such stockholder. As a condition to granting such waiver, our board of directors may require, among other things, the stockholder receiving such waiver to make certain representations, warranties and covenants related to our ability to qualify as a REIT. In addition, our board of directors may require an opinion of counsel or Internal Revenue Service ("IRS") ruling, in either case in form and substance satisfactory to our board of directors, in its sole discretion, in order to determine or ensure our status as a REIT. Our board of directors may impose such other conditions or restrictions as it deems appropriate in connection with such a waiver.

        Our charter further prohibits:

        Any person who acquires or attempts or intends to acquire beneficial or constructive ownership of shares of our stock that will or may violate the ownership limitation provisions or any of the other restrictions on ownership and transfer of our stock described above must give written notice immediately to us or, in the case of a proposed or attempted transaction, provide us at least 15 days prior written notice, and provide us with such other information as we may request in order to determine the effect of such transfer on our qualification as a REIT.

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        The ownership limitation provisions and other restrictions on ownership and transfer of our stock described above will not apply if our board of directors determines that it is no longer in our best interests to continue to qualify as a REIT or that compliance with any such restriction or limitation is no longer required for REIT qualification.

        Pursuant to our charter, if any purported transfer of our stock or any other event otherwise would result in any person violating the ownership limits or other restrictions described above, then that number of shares in excess of the ownership limit or causing a violation of one of the other restrictions (other than the 100 person limit addressed below) (rounded up to the nearest whole share) will be automatically transferred to a trust for the exclusive benefit of one or more charitable organizations selected by us. The prohibited owner will have no rights in shares of our stock held by the trustee. The automatic transfer will be effective as of the close of business on the business day prior to the date of the purported transfer or other event that results in the transfer to the trust. Any dividend or other distribution paid to the prohibited owner, prior to our discovery that the shares had been automatically transferred to a trust as described above, must be repaid to the trustee upon demand, and any dividend or other distribution authorized but unpaid shall be paid when due to the trustee, for distribution to the beneficiary of the trust. If the transfer to the trust as described above is not automatically effective, for any reason, to prevent violation of the applicable ownership limit or our failing to qualify as a REIT, then our charter provides that the transfer of shares resulting in such violation will be void. If, however, any transfer of our stock would result in shares of our stock being beneficially owned by fewer than 100 persons (determined without reference to any rules of attribution), then any such purported transfer will be automatically void and of no force or effect and the intended transferee will acquire no rights in the shares.

        The trustee must sell the shares to a person or entity designated by the trustee who could own the shares without violating the ownership limits or any of the other restrictions on ownership and transfer of our stock; provided that the right of the trustee to sell the shares will be subject to the rights of any person or entity to purchase such shares from the trust that we establish by an agreement entered into prior to the date the shares are transferred to the trust. Upon such sale, the interest of the charitable beneficiary in the shares sold shall terminate, and the trustee must distribute to the prohibited owner an amount equal to the lesser of: (a) the price paid by the prohibited owner for the shares (or, if the prohibited owner did not give value for the shares in connection with the transfer or other event that resulted in the transfer to the trust (e.g., a gift, devise or other such transaction), the fair market value of such shares on the day of the transfer or other event that resulted in the transfer of such shares to the trust), as determined under our charter, and (b) the sales proceeds (net of commissions and other expenses of sale) received by the trustee for the shares. The trustee may reduce the amount payable to the prohibited owner by the amount of any dividends or other distributions paid to the prohibited owner and owed by the prohibited owner before our discovery that the shares had been transferred to the trust and that is owed by the prohibited owner to the trustee. Any net sales proceeds in excess of the amount payable to the prohibited owner will be immediately paid to the charitable beneficiary, together with any dividends or other distributions thereon. In addition, if prior to discovery by us that shares of our stock have been transferred to the trust, such shares of stock are sold by a prohibited owner, then such shares shall be deemed to have been sold on behalf of the trust and, to the extent that the prohibited owner received an amount for or in respect of such shares that exceeds the amount that such prohibited owner was entitled to receive, such excess amount shall be paid to the trustee upon demand. The prohibited owner has no rights in the shares held by the trustee.

        The trustee will be designated by us and will be unaffiliated with us and with any prohibited owner. Prior to the sale of any shares by the trust, the trustee will receive, in trust for the charitable beneficiary, all dividends and other distributions paid by us with respect to such shares and may also exercise all voting rights with respect to such shares for the exclusive benefit of the charitable beneficiary.

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        Subject to Maryland law, effective as of the date that the shares have been transferred to the trust, the trustee shall have the authority, at the trustee's sole discretion:

        However, if we have already taken irreversible corporate action, then the trustee may not rescind and recast the vote.

        If our board of directors determines in good faith that a proposed transfer or other event has taken place that would violate the restrictions on ownership and transfer of our stock set forth in our charter, our board of directors shall take such action as it deems advisable to refuse to give effect to or to prevent such transfer, including, but not limited to, causing us to redeem shares of stock, refusing to give effect to the transfer on our books or instituting proceedings to enjoin the transfer.

        Following the end of each REIT taxable year, every owner of 5% or more (or such lower percentage as required by the Code or the regulations promulgated thereunder) of the outstanding shares of any class or series of our stock, upon request following the end of each of our taxable years, must give written notice to us stating the name and address of such owner, the number of shares of each class and series of our stock that the owner beneficially owns and a description of the manner in which the shares are held. Each such owner also must provide us with any additional information that we request in order to determine the effect, if any, of the person's actual or beneficial ownership on our qualification as a REIT and to ensure compliance with the ownership limitation provisions. In addition, any person or entity that is an actual owner, beneficial owner or constructive owner of shares of our stock and any person or entity (including the stockholder of record) who is holding shares of our stock for an actual owner, beneficial owner or constructive owner must, on request, provide in writing to us such information as we may request in good faith in order to determine our qualification as a REIT and comply with requirements of any taxing authority or governmental authority or to determine such compliance.

        Any certificates representing shares of our stock will bear a legend referring to the restrictions on ownership and transfer of our stock described above.

        These restrictions on ownership and transfer could delay, defer or prevent a transaction or a change of control of our company that might involve a premium price for our common stock that our stockholders believe to be in their best interest.

Listing

        Our common stock is listed on the NYSE under the symbol "TIER."

Transfer Agent and Registrar

        The transfer agent and registrar for the shares of our common stock is DST Systems, Inc.

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DESCRIPTION OF PREFERRED STOCK OF TIER REIT, INC.

        The following description summarizes the material provisions of the preferred stock we may offer. This description is not complete and is subject to, and is qualified entirely by reference to our charter, bylaws and the applicable provisions of the MGCL. Any series of preferred stock we issue will be governed by our charter (as amended and in effect as of the date of such issuance).

        Our charter authorizes our board of directors to designate and issue one or more classes or series of preferred stock without stockholder approval. Our board of directors may determine the relative rights, preferences and privileges of each class or series of preferred stock so issued. No shares of our preferred stock are presently outstanding. The specific terms of any series of preferred stock offered hereunder will be described in the applicable prospectus supplement.

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DESCRIPTION OF STOCK PURCHASE CONTRACTS OF TIER REIT, INC.

        We may issue stock purchase contracts, including contracts obligating holders to purchase from us and us to sell to the holders, a specified number of shares of common stock, preferred stock or depositary shares at a future date or dates. Alternatively, the stock purchase contracts may obligate us to purchase from holders, and obligate holders to sell to us, a specified or varying number of shares of common stock, preferred stock or depositary shares. The consideration per share of common stock or preferred stock or per depositary share may be fixed at the time the stock purchase contracts are issued or may be determined by a specific reference to a formula set forth in the stock purchase contracts. The stock purchase contracts may provide for settlement by delivery by us or on our behalf of shares of the underlying security, or they may provide for settlement by reference or linkage to the value, performance or trading price of the underlying security. The stock purchase contracts may require us to make periodic payments to the holders of the stock purchase units or vice versa, and such payments may be unsecured or prefunded on some basis and may be paid on a current or on a deferred basis. The stock purchase contracts may require holders to secure their obligations thereunder in a specified manner and may provide for the prepayment of all or part of the consideration payable by holders in connection with the purchase of the underlying security or other property pursuant to the stock purchase contracts.

        The securities related to the stock purchase contracts may be pledged to a collateral agent for our benefit pursuant to a pledge agreement to secure the obligations of holders of stock purchase contracts to purchase the underlying security or property under the related stock purchase contracts. The rights of holders of stock purchase contracts to the related pledged securities will be subject to our security interest therein created by the pledge agreement. No holder of stock purchase contracts will be permitted to withdraw the pledged securities related to such stock purchase contracts from the pledge arrangement.

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DESCRIPTION OF DEPOSITARY SHARES OF TIER REIT, INC.

        This section outlines some of the provisions of the deposit agreement to govern any depositary shares, the depositary shares themselves and the depositary receipts. This information may not be complete in all respects and is qualified entirely by reference to the relevant deposit agreement and depositary receipts with respect to the depositary shares related to any particular series of preferred stock. The specific terms of any series of depositary shares will be described in the applicable prospectus supplement. If so described in the prospectus supplement, the terms of that series of depositary shares may differ from the general description of terms presented below.

Interest in a Fractional Share, or Multiple Shares, of Preferred Stock

        We may, at our option, elect to offer depositary shares, each of which would represent an interest in a fractional share, or multiple shares, of our preferred stock instead of whole shares of preferred stock. If so, we will allow a depositary to issue to the public depositary shares, each of which will represent an interest in a fractional share, or multiple shares, of preferred stock as described in the prospectus supplement.

Deposit Agreement

        The shares of the preferred stock underlying any depositary shares will be deposited under a separate deposit agreement between us and a bank or trust company acting as depositary with respect to those shares of preferred stock. The prospectus supplement relating to a series of depositary shares will specify the name and address of the depositary. Under the deposit agreement, each owner of a depositary share will be entitled, in proportion of its interest in a fractional share, or multiple shares, of the preferred stock underlying that depositary share, to all the rights and preferences of that preferred stock, including dividend, voting, redemption, conversion, exchange and liquidation rights.

        Depositary shares will be evidenced by one or more depositary receipts issued under the deposit agreement. We will distribute depositary receipts to those persons purchasing such depositary shares in accordance with the terms of the offering made by the related prospectus supplement.

Dividends and Other Distributions

        The depositary will distribute all cash dividends or other cash distributions in respect of the preferred stock underlying the depositary shares to each record depositary shareholder based on the number of the depositary shares owned by that holder on the relevant record date. The depositary will distribute only that amount which can be distributed without attributing to any depositary shareholders a fraction of one cent, and any balance not so distributed will be added to and treated as part of the next sum received by the depositary for distribution to record depositary shareholders.

        If there is a distribution other than in cash, the depositary will distribute property to the entitled record depositary shareholders, unless the depositary determines that it is not feasible to make that distribution. In that case the depositary may, with our approval, adopt the method it deems equitable and practicable for making that distribution, including any sale of property and the distribution of the net proceeds from this sale to the concerned holders.

        Each deposit agreement will also contain provisions relating to the manner in which any subscription or similar rights we offer to holders of the relevant series of preferred stock will be made available to depositary shareholders.

        The amount distributed in all of the foregoing cases will be reduced by any amounts required to be withheld by us or the depositary on account of taxes and governmental charges.

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Withdrawal of Preferred Stock

        Upon surrender of depositary receipts at the office of the depositary and upon payment of the charges provided in the deposit agreement and subject to the terms thereof, a holder of depositary receipts is entitled to have the depositary deliver to such holder the applicable number of shares of preferred stock underlying the depositary shares evidenced by the surrendered depositary receipts. There may be no market, however, for the underlying preferred stock and once the underlying preferred stock is withdrawn from the depositary, it may not be redeposited.

Redemption and Liquidation

        The terms on which the depositary shares relating to the preferred stock of any series may be redeemed, and any amounts distributable upon our liquidation, dissolution or winding up, will be described in the applicable prospectus supplement.

Voting

        Upon receiving notice of any meeting at which preferred stockholders of any series are entitled to vote, the depositary will mail the information contained in that notice to the record depositary shareholders relating to those series of preferred stock. Each depositary shareholder on the record date will be entitled to instruct the depositary on how to vote the shares of preferred stock underlying that holder's depositary shares. The depositary will vote the shares of preferred stock underlying those depositary shares according to those instructions, and we will take reasonably necessary actions to enable the depositary to do so. If the depositary does not receive specific instructions from the depositary shareholders relating to that preferred stock, it will abstain from voting those shares of preferred stock, unless otherwise discussed in the prospectus supplement.

Amendment and Termination of Deposit Agreement

        We and the depositary may amend the depositary receipt form evidencing the depositary shares and the related deposit agreement. However, any amendment that significantly affects the rights of the depositary shareholders will not be effective unless holders of a majority of the outstanding depositary shares approve that amendment. No amendment, however, may impair the right of any depositary shareholder to receive any money or other property to which he may be entitled under the terms of the deposit agreement at the times and in the manner and amount provided for therein. We or the depositary may terminate a deposit agreement only if:

Charges of Depositary

        We will pay all transfer and other taxes and governmental charges arising solely from the existence of the depositary arrangements. We will also pay all charges of each depositary in connection with the initial deposit and any redemption of the preferred stock. Depositary shareholders will be required to pay any other transfer and other taxes and governmental charges and any other charges expressly provided in the deposit agreement to be for their accounts.

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Miscellaneous

        Each depositary will forward to the relevant depositary shareholders all our reports and communications that we are required to furnish to preferred stockholders of any series.

        The deposit agreement will contain provisions relating to adjustments in the fraction of a share of preferred stock represented by a depositary share in the event of a change in par value, split-up, combination or other reclassification of the preferred stock or upon any recapitalization, merger or sale of substantially all of our assets.

        Neither the depositary nor our company will be liable if it is prevented or delayed by law or any circumstance beyond its control in performing its obligations under any deposit agreement, or subject to any liability under the deposit agreement to holders of depositary receipts other than for the relevant party's gross negligence or willful misconduct. The obligations of our company and each depositary under any deposit agreement will be limited to performance in good faith of their duties under that agreement, and they will not be obligated to prosecute or defend any legal proceeding in respect of any depositary shares or preferred stock unless they are provided with satisfactory indemnity. They may rely upon written advice of counsel or accountants, or information provided by persons presenting preferred stock for deposit, depositary shareholders or other persons believed to be competent and on documents believed to be genuine.

Resignation and Removal of Depositary

        A depositary may resign at any time by issuing us a notice of resignation, and we may remove any depositary at any time by issuing it a notice of removal. Resignation or removal will take effect upon the appointment of a successor depositary and its acceptance of appointment. That successor depositary must be appointed within 60 days after delivery of the notice of resignation or removal.

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DESCRIPTION OF WARRANTS OF TIER REIT, INC.

        TIER REIT, Inc. may issue warrants for the purchase of TIER REIT, Inc.'s preferred stock or common stock by this prospectus. Warrants may be issued independently, together with any other securities offered by any prospectus supplement or through a dividend or other distribution to the stockholders of TIER REIT, Inc. and may be attached to or separate from such securities. We may issue warrants under a warrant agreement to be entered into between us and a warrant agent. We will name any warrant agent in the applicable prospectus supplement. The warrant agent will act solely as our agent in connection with the warrants of a particular series and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants. In the applicable prospectus supplement, we will describe the terms of the warrants and applicable warrant agreement, including, where applicable, the following:

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GLOBAL SECURITIES

        We may issue some or all of our securities of any series as global securities. We will register each global security in the name of a depositary identified in the applicable prospectus supplement. The global securities will be deposited with a depositary or nominee or custodian for the depositary and will bear a legend regarding restrictions on exchanges and registration of transfer as discussed below and any other matters to be provided pursuant to the applicable prospectus supplement.

        As long as the depositary or its nominee is the registered holder of a global security, that person will be considered the sole owner and holder of the global security and the securities represented by it for all purposes under the securities and the applicable prospectus supplement. Except in limited circumstances, owners of a beneficial interest in a global security:

        We will make all payments of principal and any premium and interest on a global security to the depositary or its nominee as the holder of the global security. The laws of some jurisdictions require that certain purchasers of securities take physical delivery of securities in definitive form. These laws may impair the ability to transfer beneficial interests in a global security.

        Ownership of beneficial interests in a global security will be limited to institutions having accounts with the depositary or its nominee, called "participants" for purposes of this discussion, and to persons that hold beneficial interests through participants. When a global security is issued, the depositary will credit on its book-entry, registration and transfer system the principal amounts of securities represented by the global security to the accounts of its participants. Ownership of beneficial interests in a global security will be shown only on, and the transfer of those ownership interests will be effected only through, records maintained by:

        Payments by participants to owners of beneficial interests held through the participants will be the responsibility of the participants. The depositary may from time to time adopt various policies and procedures governing payments, transfers, exchanges and other matters relating to beneficial interests in a global security. None of the following will have any responsibility or liability for any aspect of the depositary's or any participant's records relating to, or for payments made on account of, beneficial interests in a global security, or for maintaining, supervising or reviewing any records relating to those beneficial interests:

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MATERIAL PROVISIONS OF MARYLAND LAW AND OUR CHARTER AND BYLAWS

        The following description of the terms of our stock and of certain provisions of Maryland law is only a summary. Copies of our charter and bylaws are filed as exhibits to the registration statement of which this prospectus is a part and the following description is qualified entirely by reference to our charter and bylaws and the applicable provisions of Maryland law.

Number of Directors; Vacancies

        Our charter provides that the number of directors will be set only by the board of directors in accordance with our bylaws. Our bylaws provide that a majority of our entire board of directors may at any time increase or decrease the number of directors. However, the number of directors may never be less than the minimum number required by the MGCL, which is one.

        Our charter and bylaws provide that any and all vacancies on our board of directors may be filled only by the affirmative vote of a majority of the remaining directors in office, even if the remaining directors do not constitute a quorum, and any individual elected to fill such vacancy will serve for the remainder of the full term of the class in which the vacancy occurred and until a successor is duly elected and qualifies.

Annual Elections; Plurality Voting

        Each of our directors will be elected by our stockholders to serve until our next annual meeting of stockholders and until his or her successor is duly elected and qualifies. Pursuant to our bylaws, directors are elected by a plurality of all of the votes cast in the election of directors.

Removal of Directors

        Our charter provides that, subject to the rights, if any, of holders of any class or series of preferred stock to elect or remove one or more directors, a director may be removed only for cause, and then only by the affirmative vote of the shares entitled to cast a majority of all the votes entitled to be cast generally in the election of directors. "Cause" is defined in our charter to mean conviction of a director of a felony or a final judgment of a court of competent jurisdiction holding that a director caused demonstrable, material harm to us through bad faith or active and deliberate dishonesty. This provision, when coupled with the exclusive power of our board of directors to fill vacancies on our board of directors, precludes stockholders from (1) removing incumbent directors except upon the affirmative vote of the shares entitled to cast a majority of all the votes entitled to be cast on the matter and for cause and (2) filling the vacancies created by such removal with their own nominees.

Calling of Special Meetings of Stockholders

        Our bylaws provide that special meetings of stockholders may be called by our president and our board of directors. Additionally, our bylaws provide that, subject to the satisfaction of certain procedural and informational requirements by the stockholders requesting the meeting, a special meeting of stockholders to act on any matter that may properly be considered at a meeting of stockholders shall be called by the secretary of the corporation upon the written request of stockholders entitled to cast not less than a majority of all the votes entitled to be cast on such matter at such meeting.

Business Combinations

        Under the MGCL, certain "business combinations" (including a merger, consolidation, share exchange or, in certain circumstances, an asset transfer or issuance or reclassification of equity securities) between a Maryland corporation and any interested stockholder, or an affiliate of such an

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interested stockholder, are prohibited for five years following the most recent date on which the interested stockholder became an interested stockholder. Maryland law defines an interested stockholder as:

        After such five-year period, any such business combination must be recommended by the board of directors of the corporation and approved by the affirmative vote of at least:

        These supermajority approval requirements do not apply if, among other conditions, the corporation's common stockholders receive a minimum price (as defined in the MGCL) for their shares and the consideration is received in cash or in the same form as previously paid by the interested stockholder for its shares. In addition, a person is not an interested stockholder under the statute if the board of directors approved in advance the transaction by which the person otherwise would have become an interested stockholder. The board of directors may provide that its approval is subject to compliance with any terms and conditions determined by it.

        These provisions of the MGCL do not apply, however, to business combinations that are approved or exempted by a corporation's board of directors prior to the time that the interested stockholder becomes an interested stockholder. These provisions of the MGCL may have the effect of delaying, deferring or preventing a transaction or a change of control of our company that might involve a premium price for holders of our common stock or that our common stockholders otherwise believe to be in their best interests.

Control Share Acquisitions

        The MGCL provides that holders of "control shares" of a Maryland corporation acquired in a "control share acquisition" have no voting rights with respect to any control shares except to the extent approved at a special meeting of stockholders by the affirmative vote of at least two-thirds of the votes entitled to be cast on the matter, excluding shares of stock of a corporation in respect of which any of the following persons is entitled to exercise or direct the exercise of the voting power of such shares in the election of directors: (a) a person who makes or proposes to make a control share acquisition; (b) an officer of the corporation; or (c) an employee of the corporation who is also a director of the corporation. "Control shares" are voting shares of stock which, if aggregated with all other such shares of stock previously acquired by the acquirer or in respect of which the acquirer is able to exercise or direct the exercise of voting power (except solely by virtue of a revocable proxy), would entitle the acquirer to exercise voting power in electing directors within one of the following ranges of voting power:

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        Control shares do not include shares that the acquiring person is then entitled to vote as a result of having previously obtained stockholder approval. A "control share acquisition" means the acquisition, directly or indirectly, of ownership of, or the power to direct the exercise of voting power with respect to, issued and outstanding control shares, subject to certain exceptions.

        A person who has made or proposes to make a control share acquisition, upon satisfaction of certain conditions (including an undertaking to pay expenses and making an "acquiring person statement" as described in the MGCL), may compel our board of directors to call a special meeting of stockholders to be held within 50 days of demand to consider the voting rights of the shares acquired or to be acquired in the control share acquisition. If no request for a special meeting is made, the corporation may itself present the question at any stockholders meeting.

        If voting rights of control shares are not approved at the meeting or if the acquiring person does not deliver an "acquiring person statement" as required by the statute, then, subject to certain conditions and limitations, the corporation may redeem any or all of the control shares (except those for which voting rights have previously been approved) for fair value determined, without regard to the absence of voting rights for the control shares, as of the date of the last control share acquisition by the acquirer or of any meeting of stockholders at which the voting rights of such shares are considered and not approved. If voting rights for control shares are approved at a stockholders meeting and the acquirer becomes entitled to vote a majority of the shares entitled to vote, all other stockholders may exercise appraisal rights, unless these specific appraisal rights are eliminated under the charter or bylaws.

        The control share acquisition statute does not apply to: (a) shares acquired in a merger, consolidation or share exchange if the corporation is a party to the transaction, or (b) acquisitions approved or exempted by the charter or bylaws of the corporation.

        Our bylaws contain a provision exempting from the control share acquisition statute any and all acquisitions by any person of shares of our stock. This bylaw provision may be amended only by our board of directors.

Appraisal Rights

        The MGCL provides that stockholders may exercise appraisal rights unless appraisal rights are eliminated under a company's charter. Our charter generally eliminates all appraisal rights of stockholders unless the board, by a majority vote of the entire board, determines that such rights shall apply, with respect to all or any classes or series of stock, to a particular transaction or to all transactions.

Subtitle 8

        Under Subtitle 8 of Title 3 of the MGCL, a Maryland corporation with a class of equity securities registered under the Exchange Act and at least three directors who are not officers or employees of the corporation, and who are not affiliated with a person who is seeking to acquire control of the corporation, may elect to be subject, by provision in its charter or bylaws or a resolution of its board of directors and notwithstanding any contrary provision in the charter or bylaws, to any or all of the following five provisions:

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        Through provisions in our charter and bylaws unrelated to Subtitle 8, we already (a) vest in the board the exclusive power to fix the number of directorships, subject to limitations set forth in our charter and bylaws, (b) provide that vacancies on our board may be filled only by the remaining directors and for the remainder of the full term of the directorship in which the vacancy occurred, and (c) require, unless called by the board of directors or our president, the request of stockholders entitled to cast not less than a majority of all votes entitled to be cast on a matter at such meeting to call a special meeting to consider and vote on any matter that may properly be considered at a meeting of stockholders. We have elected to be subject to the provision of Subtitle 8 requiring that any vacancy on the board of directors be filled only by the affirmative vote of a majority of the remaining directors for the remainder of the full term of the class of directors in which the vacancy occurred, and until a successor is duly elected and qualifies. We have not elected to require a two-thirds vote requirement for removing a director. Additionally, we have not elected to create a classified board. In the future, our board of directors may elect, without stockholder approval, to create a classified board or elect to be subject to one or more of the other provisions of Subtitle 8.

Amendments to Our Charter and Bylaws

        Other than amendments to certain provisions of our charter described below and amendments permitted to be made without stockholder approval under Maryland law or by a specific provision in our charter, our charter may be amended only if such amendment is declared advisable by our board of directors and approved by the affirmative vote of stockholders entitled to cast a majority of all of the votes entitled to be cast on the matter. Our board of directors, without stockholder approval, has the power under our charter to amend our charter from time to time to increase or decrease the aggregate number of shares of stock or the number of shares of stock of any class or series that we are authorized to issue, to authorize us to issue authorized but unissued shares of our common stock or preferred stock and to classify and reclassify unissued shares of our common stock and preferred stock into one or more classes or series of stock and set the terms of such newly classified or reclassified shares.

        Our board of directors has the exclusive power to adopt, alter or repeal any provision of our bylaws and to make new bylaws.

Transactions Outside the Ordinary Course of Business

        We generally may not merge with or into or consolidate with another company, sell all or substantially all of our assets or engage in a statutory share exchange or convert unless such transaction is declared advisable by our board of directors and approved by the affirmative vote of stockholders entitled to cast a majority of all of the votes entitled to be cast on the matter.

Dissolution of Our Company

        The voluntary dissolution of our company must be declared advisable by a majority of our entire board of directors and approved by the affirmative vote of stockholders entitled to cast a majority of all of the votes entitled to be cast on the matter.

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Meetings of Stockholders

        Under our bylaws, annual meetings of stockholders must be held at a date, time and place determined by our board of directors. Special meetings of stockholders may be called by our president or our board of directors. Additionally, a special meeting of stockholders to act on any matter that may properly be considered at a meeting of stockholders must be called by our secretary upon the written request of stockholders entitled to cast not less than a majority of all of the votes entitled to be cast on the matter at such meeting who have requested the special meeting in accordance with the procedures specified in our bylaws and provided the information and certifications required by our bylaws. Only matters set forth in the notice of a special meeting of stockholders may be considered and acted upon at such a meeting.

Advance Notice of Director Nominations and New Business

        Our bylaws provide that:

        The purpose of requiring stockholders to give advance notice of nominations and other proposals is to afford our board of directors the opportunity to consider the qualifications of the proposed nominees or the advisability of the other proposals and, to the extent considered necessary by our board of directors, to inform stockholders and make recommendations regarding the nominations or other proposals. The advance notice procedures also permit a more orderly procedure for conducting our stockholder meetings. Although our bylaws do not give our board of directors any power to disapprove stockholder nominations for the election of directors or proposals recommending certain actions, they may have the effect of precluding a contest for the election of directors or the consideration of stockholder proposals if proper procedures are not followed and of discouraging or deterring a third party from conducting a solicitation of proxies to elect its own slate of directors or to approve its own proposal without regard to whether consideration of such nominees or proposals might be harmful or beneficial to us and our stockholders.

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Action by Stockholders

        Our charter provides that stockholder action can be taken at an annual or special meeting of stockholders, or by written consent in lieu of a meeting only if such consent is approved unanimously. These provisions, combined with the requirements of our bylaws regarding advance notice of nominations and other business to be considered at a meeting of stockholders and the calling of a stockholder-requested special meeting of stockholders, may have the effect of delaying consideration of a stockholder proposal.

Anti-Takeover Effect of Certain Provisions of Maryland Law and of Our Charter and Bylaws

        The provisions of the MGCL, our charter and our bylaws described above including, among others, the Maryland business combination statute, the restrictions on ownership and transfer of our stock, the exclusive power of our board of directors to fill vacancies on the board and the advance notice provisions of our bylaws could delay, defer or prevent a transaction or a change of control of our company that might involve a premium price for holders of our common stock or otherwise be in their best interests. Likewise, if our board of directors were to opt in to the provisions of Subtitle 8 of Title 3 of the MGCL providing for a classified board of directors or if our stockholders were to vote to amend our bylaws to opt in to the control share acquisition provisions of the MGCL, these provisions of the MGCL could provide us with similar anti-takeover effects.

Indemnification and Limitation of Directors' and Officers' Liability

        Maryland law permits a Maryland corporation to include in its charter a provision limiting the liability of its directors and officers to the corporation and its stockholders for money damages except to the extent that (a) it is proved that the person actually received an improper benefit or profit in money, property or services for the amount of the benefit or profit in money, property or services actually received; or (b) a judgment or other final adjudication adverse to the person is entered in a proceeding based on a finding in the proceeding that the person's action, or failure to act, was the result of active and deliberate dishonesty and was material to the cause of action adjudicated in the proceeding. Our charter contains a provision that eliminates such liability to the maximum extent permitted by Maryland law. The MGCL requires a corporation (unless its charter provides otherwise, which our charter does not) to indemnify a director or officer who has been successful, on the merits or otherwise, in the defense of any proceeding to which he or she is made or threatened to be made a party by reason of his or her service in that capacity, or in the defense of any claim, issue or matter in the proceeding, against reasonable expenses incurred by the director or officer in connection with the proceeding, claim, issue or matter. The MGCL permits a Maryland corporation to indemnify its present and former directors and officers, among others, against judgments, penalties, fines, settlements and reasonable expenses actually incurred by them in connection with any proceeding to which they may be made or are threatened to be made a party by reason of their service in those or other capacities unless it is established that:

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        Under the MGCL, a Maryland corporation may not, however, indemnify a director or officer for an adverse judgment in a suit by or in the right of the corporation or if the director or officer was adjudged liable on the basis that personal benefit was improperly received. Notwithstanding the foregoing, unless limited by the charter (which our charter does not), a court of appropriate jurisdiction, upon application of a director or officer, may order indemnification if it determines that the director or officer is fairly and reasonably entitled to indemnification in view of all the relevant circumstances, whether or not the director or officer met the standards of conduct described above or has been adjudged liable on the basis that a personal benefit was improperly received, but such indemnification shall be limited to expenses.

        In addition, the MGCL permits a Maryland corporation to advance reasonable expenses to a director or officer, without requiring a preliminary determination of the director's or officer's ultimate entitlement to indemnification, upon the corporation's receipt of:

        Our charter authorizes us to obligate our company and our bylaws obligate us, to the fullest extent permitted by Maryland law in effect from time to time, to indemnify and to pay or reimburse reasonable expenses in advance of final disposition of a proceeding, without requiring a preliminary determination of the director's ultimate entitlement to indemnification, to:

        Our charter and bylaws also permit us to indemnify and advance expenses to (a) any person who served a predecessor of ours in any of the capacities described above and (b) any employee or agent of our company or a predecessor of our company.

        Insofar as the foregoing provisions permit indemnification of directors, officers or persons controlling us for liability arising under the Securities Act, we have been informed that in the opinion of the SEC, this indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

        We have obtained an insurance policy under which our directors and executive officers are insured, subject to the limits of the policy, against certain losses arising from claims made against such directors and officers by reason of any acts or omissions covered under such policy in their respective capacities as directors or officers, including certain liabilities under the Securities Act.

REIT Qualification

        Our charter provides that our board of directors may revoke or otherwise terminate our REIT election, without approval of our stockholders, if it determines that it is no longer in our best interests to continue to qualify as a REIT.

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MATERIAL UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

        The following is a summary of certain U.S. federal income tax considerations relating to the qualification and taxation of TIER REIT, Inc. as a REIT and relating to the purchase, ownership and disposition of common stock and preferred stock of TIER REIT, Inc.

        Because this is a summary that is intended to address only certain U.S. federal income tax considerations relating to the ownership and disposition of our common stock and preferred stock generally applicable to holders, it may not contain all the information that may be important to you. As you review this discussion, you should keep in mind that:

        In addition, this summary does not address tax considerations relating to the purchase, ownership and disposition of stock purchase contracts, depositary shares or warrants, and in the event we issue any stock purchase contracts, depositary shares or warrants, the prospectus supplement will discuss the related tax considerations in greater detail.

        You are urged both to review the following discussion and to consult with your own tax advisor to determine the effect of ownership and disposition of our common stock and preferred stock on your particular tax situation, including any state, local, or non-U.S. tax consequences.

        For purposes of this discussion, references to "we," "us" or "our," and any similar terms, refer solely to TIER REIT, Inc. and not Tier Operating Partnership LP.

        The information in this section is based on the current Code, the current, temporary and proposed regulations promulgated by the U.S. Treasury Department (the "Treasury Regulations"), the legislative history of the Code, current administrative interpretations and practices of the IRS (including its practices and policies as endorsed in private letter rulings, which are not binding on the IRS except in the case of the taxpayer to whom a private letter ruling is addressed), and existing court decisions. Future legislation, regulations, administrative interpretations and court decisions could change current law or adversely affect existing interpretations of current law, possibly with retroactive effect. Any change could apply retroactively. We have not obtained any rulings from the IRS concerning the tax treatment of the matters discussed below. Thus, it is possible that the IRS could challenge the

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statements in this discussion which do not bind the IRS or the courts, and that a court could agree with the IRS.

Classification and Taxation of TIER REIT, Inc. as a REIT

        We elected to be taxed as a REIT for U.S. federal income tax purposes commencing with our taxable year ending December 31, 2004. A REIT generally is not subject to U.S. federal income tax on the income that it distributes to stockholders if it meets the applicable REIT distribution requirements and other requirements for qualification.

        We believe that our form of organization and our operations through the date hereof and our proposed ownership, organization and method of operations thereafter have enabled and will enable to us to qualify as a REIT beginning with our taxable year ending December 31, 2004. In connection with our filing of this registration statement, we received an opinion of our tax counsel, Goodwin Procter LLP, to the effect that (i) commencing with our taxable year ended December 31, 2008, we have been organized in conformity with the requirements for qualification and taxation as a REIT and (ii) our current and proposed ownership, organization and method of operation as represented by management will allow us to continue to satisfy the requirements for qualification and taxation as a REIT. This opinion was based on representations and covenants made by us as to certain factual matters relating to our organization, our prior and intended or expected ownership and method of operation, certain assumptions relating to our organization and operation, and certain other matters affecting our ability to qualify as a REIT. Goodwin Procter LLP has not verified those representations, and their opinion has assumed that such representations and covenants are accurate and complete, that we have operated and will at all times operate in accordance with such representations and covenants and that we will take no action inconsistent with our status as a REIT. In addition, this opinion was based on the law existing and in effect as of its date. Our qualification and taxation as a REIT will depend on our ability to meet on a continuing basis, through actual operating results, asset composition, distribution levels, diversity of share ownership and the various qualification tests imposed under the Code discussed below. Goodwin Procter LLP has not reviewed and will not review our compliance with these tests on a continuing basis. Accordingly, the opinion of our tax counsel does not guarantee our ability to qualify as or remain qualified as a REIT, and no assurance can be given that we have satisfied and will satisfy such tests for our taxable year ending December 31, 2016 or for any future period. Also, the opinion of Goodwin Procter LLP is not binding on the IRS, or any court, and could be subject to modification or withdrawal based on future legislative, judicial or administrative changes to U.S. federal income tax laws, any of which could be applied retroactively. Goodwin Procter LLP has no obligation to advise us or the holders of our stock of any subsequent change in the matters addressed in its opinion, the factual representations or assumptions on which the conclusions in the opinion are based, or of any subsequent change in applicable law.

        So long as we qualify for taxation as a REIT, we generally will not be subject to U.S. federal income tax on our net income that we distribute currently to our stockholders. This treatment substantially eliminates "double taxation" (that is, taxation at both the corporate and stockholder levels) that generally results from an investment in a corporation. However, even if we qualify for taxation as a REIT, we will be subject to U.S. federal income tax as follows:

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        No assurance can be given that the amount of any such U.S. federal income taxes will not be substantial. In addition, we and our subsidiaries may be subject to a variety of taxes other than U.S. federal income tax, including payroll taxes and state, local, and non-U.S. income, franchise, property and other taxes on assets and operations. We could also be subject to tax in situations and on transactions not presently contemplated.

Requirements for Qualification as a REIT

        We elected to be taxed as a REIT under the Code effective with our taxable year ending December 31, 2004. In order to have so qualified, we must have met and continue to meet the requirements discussed below, relating to our organization, ownership, sources of income, nature of assets and distributions of income to stockholders, beginning with our taxable year ending December 31, 2004 unless otherwise noted.

        The Code defines a REIT as a corporation, trust, or association:

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        Conditions (1), (2), (3), and (4) above must be met during the entire taxable year and condition (5) above must be met during at least 335 days of a taxable year of 12 months, or during a proportionate part of a taxable year of less than 12 months. Conditions (5) and (6) need not be satisfied during a corporation's initial tax year as a REIT. For purposes of determining stock ownership under condition (6) above, a supplemental unemployment compensation benefits plan, a private foundation, and a portion of a trust permanently set aside or used exclusively for charitable purposes generally are each considered an individual. A trust that is a qualified trust under Code Section 401(a) generally is not considered an individual, and beneficiaries of a qualified trust are treated as holding shares of a REIT in proportion to their actuarial interests in the trust for purposes of condition (6) above. For purposes of condition (6) above, stock owned by an entity is attributed to the owners of the entity and an individual is deemed to own stock owned by certain family members.

        Our charter provides restrictions regarding the transfer of shares of our capital stock that are intended to assist us in satisfying the share ownership requirements described in conditions (5) and (6) above. These restrictions, however, may not ensure that we will be able to satisfy these share ownership requirements.

        To monitor its compliance with condition (6) above, a REIT is required to send annual letters to its stockholders requesting information regarding the actual ownership of its shares. If we comply with the annual letters requirement and we do not know or, exercising reasonable diligence, would not have known of our failure to meet condition (6) above, then we will be treated as having met condition (6) above.

        For purposes of condition (8) above, we will use a calendar year for U.S. federal income tax purposes, and we intend to comply with the applicable recordkeeping requirements.

Non-REIT Accumulated Earnings and Profits

        As a REIT, at the end of a taxable year, we may not have any earnings and profits accumulated in a non-REIT year (sometimes referred to as "non-REIT earnings and profits"). Such non-REIT earnings and profits include any accumulated earnings and profits of corporations whose assets we acquire (or are deemed to have acquired) through tax-free mergers and other tax-free reorganizations and through tax-free liquidations and thus generally included the accumulated earnings and profits of the corporations that we acquired in the formation transactions in connection with our initial public offering. We believe that we have operated, and we intend to continue to operate, so that we have not had and will not have any earnings and profits accumulated in a non-REIT year at the close of any taxable year.

        However, the determination of the amounts of any such non-REIT earnings and profits is a complex factual and legal determinations. In addition, certain aspects of the computational rules are not completely clear. Thus, we cannot guarantee that the IRS will not assert that we had accumulated non-REIT earnings as of the end of 2004 or a subsequent taxable year.

        If it is subsequently determined that we had any accumulated non-REIT earnings and profits as of December 31, 2004 or as of the end of any subsequent taxable year, we could fail to qualify as a REIT beginning with the applicable taxable year. Pursuant to Treasury Regulations, however, so long as our failure to comply with the prohibition on non-REIT earnings and profits was not due to fraud with intent to evade tax, we could cure such failure by paying an interest charge on 50% of the amount of accumulated non-REIT earnings and profits and by making a special distribution of accumulated non-REIT earnings and profits. We intend to utilize such cure provisions if ever required to do so. The amount of any such interest charge could be substantial.

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Taxable REIT Subsidiaries

        A TRS of ours is a corporation in which we directly or indirectly own stock and that jointly with us elects to be treated as our TRS under Section 856(l) of the Code. In addition, if one of our TRSs owns, directly or indirectly, securities representing more than 35% of the vote or value of a subsidiary corporation, that subsidiary will also be treated as our TRS. A TRS is a corporation subject to U.S. federal income tax, and state and local income tax, where applicable, as a regular C corporation.

        Generally, a TRS can perform impermissible tenant services without causing us to receive impermissible tenant services income from those services under the REIT income tests. A TRS may also engage in other activities that, if conducted by us other than through a TRS, could result in the receipt of non-qualified income or the ownership of non-qualified assets. However, several provisions regarding the arrangements between a REIT and its TRSs ensure that a TRS will be subject to an appropriate level of U.S. federal income taxation. For example, a TRS is limited in its ability to deduct interest paid or accrued to us in excess of certain amounts. In addition, we will be obligated to pay a 100% penalty tax on some payments that we receive or on certain expenses deducted by the TRS if the economic arrangements among us, our tenants, and/or the TRS are not comparable to similar arrangements among unrelated parties.

        We may own interests in one or more TRSs that may perform certain services for our tenants, receive management fee income and/or hold interests in joint ventures and private equity real estate funds that might hold assets or generate income that could cause us to fail the REIT income or asset tests or subject us to the 100% tax on prohibited transactions. Our TRSs may incur significant amounts of U.S. federal, state and local income taxes.

Subsidiary REITs

        If any REIT in which we hold or held an interest fails or failed to qualify for taxation as a REIT in any taxable year, that failure could, depending on the circumstances, adversely affect our ability to satisfy the various asset and gross income requirements applicable to REITs, including the requirement that REITs generally may not own, directly or indirectly, more than 10% of the securities of another corporation that is not a REIT or a TRS, as further described below. Investments in subsidiary REITs may pose additional challenges, such as smaller income and asset bases against which to absorb nonqualifying income and assets and, in the case of subsidiary REITs acquired by purchase, reliance on the seller's compliance with the REIT requirements for periods prior to acquisition.

Ownership of Partnership Interests and Disregarded Subsidiaries by a REIT

        A REIT that is a partner in a partnership (or a member of a limited liability company or other entity that is treated as a partnership for U.S. federal income tax purposes) will be deemed to own its proportionate share of the assets of the partnership and will be deemed to earn its proportionate share of the partnership's income. The assets and gross income of the partnership retain the same character in the hands of the REIT for purposes of the gross income and asset tests applicable to REITs, as described below. Thus, our proportionate share of the assets and items of income of any subsidiary partnership (or other entity treated as a partnership for U.S. federal income tax purposes) in which we or our operating partnership holds an interest, will be treated as our assets, liabilities and items of income for purposes of applying the REIT income and asset tests. Our operating partnership, Tier Operating Partnership LP, is a disregarded entity for U.S. federal income tax purposes as of the date hereof, but previously has been (and in the future may be) a partnership for U.S. federal income tax purposes.

        If a REIT owns a corporate subsidiary (including an entity which is treated as an association taxable as a corporation for U.S. federal income tax purposes) that is a "qualified REIT subsidiary," the separate existence of that subsidiary is disregarded for U.S. federal income tax purposes. Generally,

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a qualified REIT subsidiary is a corporation, other than a TRS, all of the capital stock of which is owned by the REIT (either directly or through other disregarded subsidiaries). For U.S. federal income tax purposes, all assets, liabilities and items of income, deduction and credit of the qualified REIT subsidiary will be treated as assets, liabilities and items of income, deduction and credit of the REIT itself. Our qualified REIT subsidiaries will not be subject to U.S. federal income taxation, but may be subject to state and local taxation in some states. Certain other entities also may be treated as disregarded entities for U.S. federal income tax purposes, generally including any domestic unincorporated entity that would be treated as a partnership if it had more than one owner, and including our operating partnership, Tier Operating Partnership LP, during periods that we are its sole beneficial owner. For U.S. federal income tax purposes, all assets, liabilities and items of income, deduction and credit of any such disregarded entity will be treated as assets, liabilities and items of income, deduction and credit of the owner of the disregarded entity.

Income Tests Applicable to REITs

        To qualify as a REIT, we must satisfy two gross income tests annually. First, at least 75% of our gross income, excluding gross income from prohibited transactions and certain other income and gains, described below, for each taxable year must be derived directly or indirectly from investments relating to real property or mortgages on real property, including "rents from real property," gains on the disposition of real estate assets other than certain debt instruments of publically offered REITs, dividends paid by another REIT, and interest on obligations secured by mortgages on real property or on interests in real property, or from some types of temporary investments. Second, at least 95% of our gross income for each taxable year, excluding gross income from prohibited transactions and certain other income and gains, described below, must be derived from any combination of income qualifying under the 75% test and dividends, interest and gain from the sale or disposition of stock or securities.

        Rents we receive will qualify as rents from real property in satisfying the gross income requirements for a REIT described above only if several conditions are met. First, the amount of rent must not be based in whole or in part on the income or profits of any person. However, an amount received or accrued generally will not be excluded from the term "rents from real property" solely by reason of being based on a fixed percentage or percentages of receipts or sales. Second, rents received from a "related party tenant" will not qualify as rents from real property in satisfying the gross income tests unless the tenant is a TRS and either (i) at least 90% of the property is leased to unrelated tenants and the rent paid by the TRS is substantially comparable to the rent paid by the unrelated tenants for comparable space, or (ii) the property leased is a "qualified lodging facility," as defined in Section 856(d)(9)(D) of the Code, or a "qualified health care property," as defined in Section 856(e)(6)(D)(i), and certain other conditions are satisfied. A tenant is a related party tenant if the REIT, or an actual or constructive owner of 10% or more of the REIT, actually or constructively owns 10% or more of the tenant. Third, if rent attributable to personal property, leased in connection with a lease of real property, is greater than 15% of the total rent received under the lease, then the portion of rent attributable to the personal property will not qualify as rents from real property.

        Generally, for rents to qualify as rents from real property for the purpose of satisfying the gross income tests, we may provide directly only an insignificant amount of services, unless those services are "usually or customarily rendered" in connection with the rental of real property and not otherwise considered "rendered to the occupant." Accordingly, we may not provide "impermissible services" to tenants (except through an independent contractor from whom we derive no revenue and that meets other requirements or through a TRS) without giving rise to "impermissible tenant service income." Impermissible tenant service income is deemed to be at least 150% of the direct cost to us of providing the service. If the impermissible tenant service income exceeds 1% of our total income from a property, then all of the income from that property will fail to qualify as rents from real property. If the total amount of impermissible tenant service income from a property does not exceed 1% of our total

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income from the property, the services will not disqualify any other income from the property that qualifies as rents from real property, but the impermissible tenant service income will not qualify as rents from real property.

        Interest on debt secured by mortgages on real property or on interests in real property generally is qualifying income for purposes of the 75% gross income test. A mortgage loan secured by both real property and personal property shall be treated as a wholly qualifying real estate asset and all interest shall be qualifying for purposes of the 75% income test if the fair market value of such personal property does not exceed 15% of the total fair market value of all such property, as of the date we make a binding commitment to make the loan.

        If we fail to satisfy one or both of the 75% or 95% gross income tests for any taxable year, we may nevertheless qualify as a REIT for that year if we are entitled to relief under the Code. These relief provisions generally will be available if our failure to meet the tests is due to reasonable cause and not due to willful neglect, we attached a schedule of the sources of our income to our federal income tax return, and otherwise comply with the applicable Treasury Regulations. It is not possible, however, to state whether in all circumstances we would be entitled to the benefit of these relief provisions. For example, if we fail to satisfy the gross income tests because nonqualifying income that we intentionally incur unexpectedly exceeds the limits on nonqualifying income, the IRS could conclude that the failure to satisfy the tests was not due to reasonable cause. If these relief provisions are inapplicable to a particular set of circumstances involving us, we will fail to qualify as a REIT. As discussed under "—Classification and Taxation of TIER REIT, Inc. as a REIT," even if these relief provisions apply, a tax would be imposed based on the amount of nonqualifying income.

Asset Tests Applicable to REITs

        To maintain our qualification as a REIT we must also satisfy, at the close of each quarter of each taxable year, the following tests relating to the nature and diversification of our assets.

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        Securities for purposes of the asset tests may include debt securities that are not fully secured by a mortgage on real property (or treated as such). However, the 10% value test does not apply to certain "straight debt" and other excluded securities, as described in the Code including, but not limited to, any loan to an individual or estate, any obligation to pay rents from real property and any security issued by a REIT. In addition, (a) a REIT's interest as a partner in a partnership is not considered a security for purposes of applying the 10% value test to securities issued by the partnership; (b) any debt instrument issued by a partnership (other than straight debt or another excluded security) will not be considered a security issued by the partnership if at least 75% of the partnership's gross income is derived from sources that would qualify for the 75% REIT gross income test; and (c) any debt instrument issued by a partnership (other than straight debt or another excluded security) will not be considered a security issued by the partnership to the extent of the REIT's interest as a partner in the partnership. In general, straight debt is defined as a written, unconditional promise to pay on demand or at a specific date a fixed principal amount, and the interest rate and payment dates on the debt must not be contingent on profits or the discretion of the debtor. In addition, straight debt may not contain a convertibility feature.

        We believe that our assets comply with the above asset tests and that we can operate so that we can continue to comply with those tests. However, our ability to satisfy these asset tests depends upon our analysis of the characterization and fair market values of our assets, some of which are not susceptible to a precise determination, and for which we will not obtain independent appraisals.

        If we fail to satisfy the 5% or 10% asset tests described above after a 30-day cure period prescribed in the Code, we will be deemed to have met those tests if the value of our non-qualifying assets is de minimis (that is, that value does not exceed the lesser of 1% of the total value of our assets at the end of the applicable quarter and $10,000,000) and we dispose of the non-qualifying assets (or otherwise cure that failure) within six months after the last day of the quarter in which the failure to satisfy the asset tests is discovered. For violations due to reasonable cause and not willful neglect that are in excess of the de minimis exception described above, we may avoid disqualification as a REIT under any of the asset tests, after the 30 day cure period, by disposing of sufficient assets (or otherwise curing that failure) to meet the asset tests within that six month period, paying a tax equal to the greater of $50,000 and the highest corporate tax rate multiplied by the net income generated by the non-qualifying assets and disclosing certain information to the IRS. If we cannot take advantage of these relief provisions, or if we fail to timely cure any noncompliance with the asset tests, we would cease to qualify as a REIT.

        If we satisfy the asset tests at the close of any quarter, we will not lose our REIT status if we fail to satisfy the asset tests at the end of a later quarter solely because of changes in asset values. If our failure to satisfy the asset tests results, either in whole or in part, from an acquisition of securities or other property during a quarter, the failure can be cured by disposing of sufficient non-qualifying assets within 30 days after the close of that quarter. We intend to maintain adequate records of the value of our assets to ensure compliance with the asset tests and to take any other action within 30 days after the close of any quarter as may be required to cure any noncompliance. In some instances, however, we may be compelled to dispose of assets that we would prefer to retain.

Annual Distribution Requirements Applicable to REITs

        To qualify as a REIT, we are required to distribute dividends, other than capital gain dividends, to our stockholders each year in an amount at least equal to (1) the sum of (a) 90% of our REIT taxable income, computed without regard to the dividends paid deduction and our net capital gain and (b) 90% of the net income, after tax, from foreclosure property, minus (2) the sum of certain specified

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items of noncash income. For purposes of the distribution requirements, any built-in gain (net of the applicable tax) we recognize during the applicable recognition period that existed on an asset at the time we acquired it from a C corporation in a carry-over basis transaction will be included in our REIT taxable income. These distributions must be paid either in the taxable year to which they relate, or in the following taxable year if declared before we timely file our tax return for the prior year and if paid with or before the first regular dividend payment date after the declaration is made.

        To the extent that we do not distribute (and are not deemed to have distributed) all of our net capital gain or distribute at least 90%, but less than 100%, of our REIT taxable income, as adjusted, we will be subject to U.S. federal income tax on these retained amounts at regular corporate tax rates.

        We will be subject to a nondeductible 4% excise tax on the excess of the required distribution over the sum of amounts actually distributed and amounts retained for which U.S. federal income tax was paid, if we fail to distribute during each calendar year at least the sum of:

        (1)   85% of our REIT ordinary income for the year;

        (2)   95% of our REIT capital gain net income for the year; and

        (3)   any undistributed taxable income from prior taxable years.

        A REIT may elect to retain rather than distribute all or a portion of its net capital gains and pay the tax on the gains. In that case, a REIT may elect to have its stockholders include their proportionate share of the undistributed net capital gains in income as long-term capital gains and receive a credit for their share of the tax paid by the REIT. For purposes of the 4% excise tax described above, any retained amounts would be treated as having been distributed.

        We believe that we have made and intend to continue to make timely distributions sufficient to satisfy the annual distribution requirements.

        We anticipate that we will generally have sufficient cash or liquid assets to enable us to satisfy the 90% distribution requirement and to distribute such greater amount as may be necessary to avoid U.S. federal income and excise taxes. It is possible, however, that, from time to time, we may not have sufficient cash or other liquid assets to fund required distributions as a result, for example, of differences in timing between our cash flow, the receipt of income for GAAP purposes and the recognition of income for U.S. federal income tax purposes, the effect of non-deductible capital expenditures, the creation of reserves, payment of required debt service or amortization payments, or the need to make additional investments in qualifying real estate assets. The insufficiency of our cash flow to cover our distribution requirements could require us to (i) sell assets in adverse market conditions, (ii) borrow on unfavorable terms, (iii) distribute amounts that would otherwise be invested in future acquisitions or capital expenditures or used for the repayment of debt, (iv) pay dividends in the form of taxable stock dividends or (v) use cash reserves, in order to comply with the REIT distribution requirements.

        Under some circumstances, we may be able to rectify a failure to meet the distribution requirement for a year by paying dividends to stockholders in a later year, which may be included in our deduction for dividends paid for the earlier year. We will refer to such dividends as "deficiency dividends." Thus, we may be able to avoid being taxed on amounts distributed as deficiency dividends. We will, however, be required to pay interest based upon the amount of any deduction taken for deficiency dividends.

Prohibited Transactions

        Net income derived from prohibited transactions is subject to a 100% tax. The term "prohibited transactions" generally includes a sale or other disposition of property (other than foreclosure property) that is held primarily for sale to customers in the ordinary course of a trade or business. Whether

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property is held "primarily for sale to customers in the ordinary course of a trade or business" depends on the specific facts and circumstances. The Code provides a safe harbor pursuant to which sales of properties held for at least two years and meeting certain additional requirements will not be treated as prohibited transactions, but compliance with the safe harbor may not always be practical. We intend to hold our properties for investment with a view to long-term appreciation, to engage in the business of owning and operating properties and to make sales of properties that are consistent with our investment objectives; however, no assurance can be given that any particular property in which we hold a direct or indirect interest will not be treated as property held for sale to customers, or that the safe-harbor provisions will apply. The 100% tax will not apply to gains from the sale of property held through a TRS or other taxable corporation, although such income will be subject to U.S. federal income tax at regular corporate income tax rates. The potential application of the prohibited transactions tax could cause us to forego potential dispositions of other property or to forego other opportunities that might otherwise be attractive to us (such as developing property for sale), or to undertake such dispositions or other opportunities through a TRS, which would generally result in corporate income taxes being incurred.

Foreclosure Property

        Foreclosure property is real property (including interests in real property) and any personal property incident to such real property (1) that is acquired by a REIT as a result of the REIT having bid in the property at foreclosure, or having otherwise reduced the property to ownership or possession by agreement or process of law, after there was a default (or default was imminent) on a lease of the property or a mortgage loan held by the REIT and secured by the property, (2) for which the related loan or lease was made, entered into or acquired by the REIT at a time when default was not imminent or anticipated and (3) for which such REIT makes an election to treat the property as foreclosure property. REITs generally are subject to tax at the maximum corporate rate (currently 35%) on any net income from foreclosure property, including any gain from the disposition of the foreclosure property, other than income that would otherwise be qualifying income for purposes of the 75% gross income test. Any gain from the sale of property for which a foreclosure property election has been made will not be subject to the 100% tax on gains from prohibited transactions described above, even if the property is held primarily for sale to customers in the ordinary course of a trade or business.

Hedging Transactions and Foreign Currency Gains

        We may enter into hedging transactions with respect to one or more of our assets or liabilities. Hedging transactions could take a variety of forms, including interest rate swaps or cap agreements, options, futures contracts, forward rate agreements or similar financial instruments. Except to the extent provided by Treasury Regulations, any income from a hedging transaction (i) made in the normal course of our business primarily to manage risk of interest rate or price changes or currency fluctuations with respect to borrowings made or to be made, or ordinary obligations incurred or to be incurred by us to acquire or own real estate assets, (ii) entered into primarily to manage the risk of currency fluctuations with respect to any item of income or gain that would be qualifying income under the 75% or 95% income tests (or any property which generates such income or gain), or (iii) for taxable years beginning on or after December 31, 2015, that hedges against transactions described in clause (i) or (ii) and is entered into in connection with the extinguishment of debt or sale of property that is being hedged against by the transaction described in clause (i) or (ii), in each case, which is clearly identified as such before the close of the day on which it was acquired, originated or entered into, including gain from the disposition or termination of such a transaction, will not constitute gross income for purposes of the 95% gross income test and the 75% gross income test. To the extent we enter into other types of hedging transactions or do not make proper tax identifications, the income from those transactions is likely to be treated as non-qualifying income for purposes of both the 75%

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and 95% gross income tests. We intend to structure any hedging transactions in a manner that does not jeopardize our ability to qualify as a REIT.

        In addition, certain foreign currency gains may be excluded from gross income for purposes of one or both of the REIT gross income tests, provided we do not deal in or engage in substantial and regular trading in securities.

Tax Aspects of Our Operating Partnership

        In General.    We will own all or substantially all of our assets through our operating partnership, Tier Operating Partnership LP, and our operating partnership in turn will own a substantial portion of its assets through interests in various partnerships and/or limited liability companies.

        Except in the case of subsidiaries that have elected REIT or TRS status, we expect that our operating partnership and its partnership and limited liability company subsidiaries will be treated as partnerships or disregarded entities for U.S. federal income tax purposes. As of the date hereof, our operating partnership is treated as a disregarded entity for U.S. federal income tax purposes. In general, entities that are classified as partnerships for U.S. federal income tax purposes are treated as "pass-through" entities which are not required to pay U.S. federal income taxes. Rather, partners or members of such entities are allocated their share of the items of income, gain, loss, deduction and credit of the entity, and are potentially required to pay tax on that income without regard to whether the partners or members receive a distribution of cash from the entity. We will include in our income our allocable share of the foregoing items for purposes of computing our REIT taxable income, based on the applicable operating agreement. For purposes of applying the REIT income and asset tests, for periods that our operating partnership is treated as a partnership for U.S. federal income tax purposes, we will include our pro rata share of the income generated by and the assets held by our operating partnership, including our operating partnership's share of the income and assets of any subsidiary partnerships and limited liability companies treated as partnerships for U.S. federal income tax purposes, based on our capital interests in such entities. See "—Ownership of Partnership Interests and Disregarded Subsidiaries by a REIT."

        Our ownership interests in such subsidiaries involve special tax considerations, including the possibility that the IRS might challenge the status of these entities as partnerships or disregarded entities, as opposed to associations taxable as corporations, for U.S. federal income tax purposes. If our operating partnership or one or more of its subsidiary partnerships or limited liability companies intended to be taxed as a partnership, were treated as an association, it would be taxable as a corporation and would be subject to U.S. federal income taxes on its income. In that case, the character of the entity and its income would change for purposes of the asset and income tests applicable to REITs, and could prevent us from satisfying these tests. See "—Asset Tests Applicable to REITs" and "—Income Tests Applicable to REITs." This, in turn, could prevent us from qualifying as a REIT. See "—Failure to Qualify as a REIT" for a discussion of the effect of our failure to meet these tests for a taxable year.

        We believe that our operating partnership and other subsidiary partnerships and limited liability companies that do not elect REIT or TRS status have been and/or will be classified as partnerships or disregarded entities for U.S. federal income tax purposes, and the remainder of the discussion under this section "—Tax Aspects of Our Operating Partnership" is based on such classification.

        Although a domestic unincorporated entity is generally treated as a partnership (if it has more than one owner) or a disregarded entity (if it has a single owner) for U.S. federal income tax purposes, in certain situations such an entity may be treated as a corporation for U.S. federal income tax purposes, including if the entity is a "publicly traded partnership" that does not qualify for an

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exemption based on the character of its income. A partnership is a "publicly traded partnership" under Section 7704 of the Code if:

        If our operating partnership were a publicly traded partnership during any period that it was treated as a partnership for U.S. federal income tax purposes, it would be taxed as a corporation unless at least 90% of its gross income for each taxable year beginning with the first year it is treated as a publicly traded partnership has consisted and will consist of "qualifying income" under Section 7704 of the Code. Qualifying income generally includes real property rents and other types of passive income. The income requirements applicable to REITs under the Code and the definition of qualifying income under the publicly traded partnership rules are very similar. However, some important differences exist that may cause certain amounts that qualify as rents from real property under the REIT rules to fail to qualify as such under the publicly traded partnership qualifying income rules. One important difference is that, while the REIT rules and the publicly traded partnership rules both generally exclude rents from related party tenants from qualifying income, the publicly traded partnership qualifying income rules use different constructive ownership rules, as compared to the REIT income test rules, to determine whether a tenant is a "related party tenant." The applicable rules present additional risk of having related party tenants (including related party tenants unknown to us) for publicly traded partnership purposes as compared to for REIT purposes.

        During any period that our operating partnership intends to be treated as a partnership for U.S. federal income tax purposes, we intend for our operating partnership to qualify for one or more of the safe harbors under the applicable Treasury Regulations to avoid classification as a publicly traded partnership. One of these safe harbors requires that the partnership has no more than 100 partners and certain other requirements are satisfied. We believe our operating partnership has never had 100 or more partners (as determined for purposes of this safe harbor). Unless and until we determine that we can rely on the qualifying income exemption, we intend to limit subsequent transfers of operating partnership units that would cause our operating partnership to violate this 100-partner limitation. However, we cannot assure you that we will be successful in all cases in limiting such transfers.

        Allocations of Income, Gain, Loss and Deduction.    A partnership or limited liability company agreement will generally determine the allocation of income and losses among partners or members for U.S. federal income tax purposes. These allocations, however, will be disregarded for tax purposes if they do not comply with the provisions of Section 704(b) of the Code and the related Treasury Regulations. Generally, Section 704(b) of the Code and the related Treasury Regulations require that partnership and limited liability company allocations respect the economic arrangement of their partners or members. If an allocation is not recognized by the IRS for U.S. federal income tax purposes, the item subject to the allocation will be reallocated according to the partners' or members' interests in the partnership or limited liability company, as the case may be. This reallocation will be determined by taking into account all of the facts and circumstances relating to the economic arrangement of the partners or members with respect to such item. The allocations of taxable income and loss in our operating partnership and its partnership subsidiaries are intended to comply with the requirements of Section 704(b) of the Code and the Treasury Regulations promulgated thereunder (during periods that such entities are intended to be treated as partnership for U.S. federal income tax purposes).

        Tax Allocations With Respect to Contributed Properties.    When property is contributed to a partnership in exchange for an interest in the partnership, the partnership generally takes a carryover basis in that property for tax purposes. That carryover basis is equal to the contributing partner's

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adjusted basis in the property rather than the fair market value of the property at the time of contribution. Section 704(c) of the Code requires the allocation of income, gain, loss and deduction attributable to the contributed property in a manner that allocates the unrealized gain or unrealized loss associated with the property at the time of the contribution to the contributing partner. The amount of the unrealized gain or unrealized loss, also known as a "book-tax difference," generally is equal to the difference between the fair market value of the contributed property at the time of contribution and the adjusted basis of the property at that time. Those allocations are solely for U.S. federal income tax purposes and do not affect the book capital accounts or other economic or legal arrangements among the partners.

        In general, partners who have contributed to our partnerships their interests in properties with a book-tax difference will be allocated lower amounts of depreciation deductions for tax purposes than if those deductions were determined on a pro rata basis. In addition, in the event of the disposition of any of the contributed assets that has a book-tax difference, all taxable income attributable to the book-tax difference generally will be allocated to the contributing partners, and our companies that are the direct partners of our partnerships generally will be allocated only their share of gains attributable to appreciation, if any, occurring after the acquisition of those properties. These allocations will tend to eliminate the book-tax differences over the lives of our partnerships. However, the allocation rules of section 704(c) of the Code do not always entirely eliminate the book-tax difference on an annual basis or with respect to a specific taxable transaction like a sale. In those cases, the carryover basis of the contributed assets in the hands of our partnerships may cause us to be allocated lower depreciation and other deductions and thereby cause us to be allocated more taxable income than if there were no book-tax difference. As a result, we could recognize taxable income in excess of distributed amounts, which might adversely affect our ability to comply with the REIT distribution requirements, and we may realize income on the distribution of cash because our basis has not increased sufficiently from income allocations. See "Taxation of the Company as a REIT—Annual Distribution Requirements."

        Recent Legislation.    Congress recently revised the rules applicable to federal income tax audits of partnerships and the collection of any tax resulting from any such audits or other tax proceedings, generally for taxable years beginning after December 31, 2017. Under the new rules, the partnership itself may be liable for a hypothetical increase in partner-level taxes (including interest and penalties) resulting from an adjustment of partnership tax items on audit, regardless of changes in the composition of the partners (or their relative ownership) between the year under audit and the year of the adjustment. The new rules also include an elective alternative method under which the additional taxes resulting from the adjustment are assessed from the affected partners, subject to a higher rate of interest than otherwise would apply. Many questions remain as to how the new rules will apply, especially with respect to partners that are REITs, and it is not clear at this time what effect this new legislation will have on us. However, these changes could increase the federal income tax, interest, and/or penalties otherwise borne by us in the event of a federal income tax audit of our operating partnership or any subsidiary partnerships.

Failure to Qualify as a REIT

        In the event we violate a provision of the Code that would result in our failure to qualify as a REIT, specified relief provisions will be available to us to avoid such disqualification if (1) the violation is due to reasonable cause and not willful neglect, (2) we pay a penalty of $50,000 for each failure to satisfy the provision and (3) the violation does not include a violation under the gross income or asset tests described above (for which other specified relief provisions are available). This cure provision reduces the instances that could lead to our disqualification as a REIT for violations due to reasonable cause. It is not possible to state whether, in all circumstances, we will be entitled to this statutory relief. If we fail to qualify as a REIT in any taxable year, and the relief provisions of the Code do not apply, we will be subject to tax, including any applicable alternative minimum tax, on our taxable income at

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regular corporate rates. Distributions to our stockholders in any year in which we are not a REIT will not be deductible by us, nor will they be required to be made. In this situation, to the extent of current and accumulated earnings and profits, and, subject to limitations of the Code, distributions to our stockholders will generally be taxable to stockholders who are individual U.S. stockholders at a maximum rate of 20%, and dividends received by our corporate U.S. stockholders may be eligible for a dividends received deduction. Unless we are entitled to relief under specific statutory provisions, we will also be disqualified from re-electing REIT status for the four taxable years following a year during which qualification was lost.

Taxation of Stockholders and Potential Tax Consequences of Their Investment in Shares of Common Stock or Preferred Stock

Taxation of Taxable U.S. Stockholders

        The term "U.S. stockholder" means a holder of shares of our common stock or preferred stock who, for U.S. federal income tax purposes, is:

        If a partnership or an entity treated as a partnership for U.S. federal income tax purposes holds our stock, the U.S. federal income tax treatment of a partner in the partnership will generally depend on the status of the partner and the activities of the partnership. If you are a partner in a partnership holding our common stock or preferred stock, you should consult your own tax advisor regarding the consequences of the ownership and disposition of shares of our stock by the partnership.

        Dividends.    As long as we qualify as a REIT, a taxable U.S. stockholder must generally take into account as ordinary income distributions made out of our current or accumulated earnings and profits that we do not designate as capital gain dividends. Distributions on our preferred stock will be treated as made out of any available earnings and profits in priority to distributions on our common stock. Dividends paid to a non-corporate U.S. stockholder generally will not qualify for the 20% tax rate for "qualified dividend income." Qualified dividend income generally includes dividends paid to most U.S. non-corporate taxpayers by domestic C corporations and certain qualified foreign corporations. Because we are not generally subject to U.S. federal income tax on the portion of our REIT taxable income distributed to our stockholders, our ordinary dividends generally will not be eligible for the 20% tax rate on qualified dividend income. As a result, our ordinary dividends will continue to be taxed at the higher tax rate applicable to ordinary income. However, the 20% tax rate for qualified dividend income will apply to our ordinary dividends (1) attributable to dividends received by us from taxable corporations, such as our TRSs, and (2) to the extent attributable to income upon which we have paid corporate income tax (e.g., to the extent that we distribute less than 100% of our taxable income). In general, to qualify for the reduced tax rate on qualified dividend income, a stockholder must hold our stock for more than 60 days during the 121-day period beginning on the date that is 60 days before the date on which our stock becomes ex-dividend. Dividends paid to a corporate U.S. stockholder will not qualify for the dividends received deduction generally available to

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corporations. If we declare a dividend in October, November, or December of any year that is payable to a U.S. stockholder of record on a specified date in any such month, such dividend will be treated as both paid by us and received by the U.S. stockholder on December 31 of such year, provided that we actually pay the dividend during January of the following calendar year.

        Dividends from us that are designated as capital gain dividends will be taxed to U.S. stockholders as long-term capital gains, to the extent that they do not exceed our actual net capital gains for the taxable year, without regard to the period for which the U.S. stockholder has held its stock. Corporate U.S. stockholders may be required to treat up to 20% of some capital gain dividends as ordinary income. Long-term capital gains are generally taxable at a maximum U.S. federal rate of 20%, in the case of U.S. stockholders who are individuals, and 35% for corporations. Capital gains dividends attributable to the sale of depreciable real property held for more than 12 months are subject to a 25% U.S. federal income tax rate for U.S. stockholders who are individuals, trusts or estates, to the extent of certain previously claimed depreciation deductions.

        We may elect to retain and pay income tax on the net long-term capital gain that we receive in a taxable year. In that case, we may elect to designate the retained amount as a capital gain dividend with the result that a U.S. stockholder would be taxed on its proportionate share of our undistributed long-term capital gain. The U.S. stockholder would receive a credit or refund for its proportionate share of the tax we paid. The U.S. stockholder would increase the basis in its stock by the amount of its proportionate share of our undistributed long-term capital gain, minus its share of the tax we paid.

        A U.S. stockholder will not incur tax on a distribution in excess of our current and accumulated earnings and profits if the distribution does not exceed the adjusted basis of the U.S. stockholder's stock. Instead, the distribution will reduce the adjusted basis of such stock. A U.S. stockholder will recognize gain upon a distribution in excess of both our current and accumulated earnings and profits and the U.S. stockholder's adjusted basis in his or her stock as long-term capital gain if the shares of stock have been held for more than one year, or short-term capital gain, if the shares of stock have been held for one year or less.

        Stockholders may not include in their own income tax returns any of our net operating losses or capital losses. Instead, these losses are generally carried over by us for potential offset against our future income. Taxable distributions from us and gain from the disposition of our stock will not be treated as passive activity income and, therefore, stockholders generally will not be able to apply any "passive activity losses," such as losses from certain types of limited partnerships in which the stockholder is a limited partner, against such income. In addition, taxable distributions from us generally will be treated as investment income for purposes of the investment interest limitations. A U.S. stockholder that elects to treat capital gain dividends, capital gains from the disposition of stock or qualified dividend income as investment income for purposes of the investment interest limitation will be taxed at ordinary income rates on such amounts. We will notify stockholders after the close of our taxable year as to the portions of the distributions attributable to that year that constitute ordinary income, return of capital, and capital gain. Ordinary income and capital gain must be allocated proportionately among taxable dividends on any class of our preferred stock, on the one hand, and common stock, on the other.

        Dispositions of Stock.    In general, a U.S. stockholder who is not a dealer in securities must treat any gain or loss realized upon a taxable disposition of our stock as long-term capital gain or loss if the U.S. stockholder has held our stock for more than one year. Otherwise, the U.S. stockholder must treat any such gain or loss as short-term capital gain or loss. However, a U.S. stockholder must treat any loss upon a sale or exchange of our stock held by such stockholder for six months or less as a long-term capital loss to the extent of capital gain dividends and any other actual or deemed distributions from us that such U.S. stockholder treats as long-term capital gain. All or a portion of any loss that a U.S. stockholder realizes upon a taxable disposition of our common stock or preferred stock may be disallowed if the U.S. stockholder repurchases our common stock or preferred stock, respectively, within 30 days before or after the disposition.

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        A redemption by us of any redeemable preferred stock we may issue could be treated either as a taxable disposition of shares or as a dividend, depending on the applicable facts and circumstances. In the event we issue any redeemable preferred stock, the prospectus supplement will discuss the tax considerations of owning such securities in greater detail.

        Capital Gains and Losses.    The tax rate differential between capital gain and ordinary income for non-corporate taxpayers may be significant. A taxpayer generally must hold a capital asset for more than one year for gain or loss derived from its sale or exchange to be treated as long-term capital gain or loss. The highest marginal individual income tax rate is currently 39.6%. The maximum tax rate on long-term capital gains applicable to non-corporate taxpayers is 20% for sales and exchanges of capital assets held for more than one year. The maximum tax rate on long-term capital gain from the sale or exchange of "section 1250 property," or depreciable real property, is 25% to the extent that such gain, known as "unrecaptured section 1250 gains, would have been treated as ordinary income on depreciation recapture if the property were "section 1245 property." With respect to distributions that we designate as capital gain dividends and any retained capital gain that we are deemed to distribute, we generally may designate whether such a distribution is taxable to our non-corporate stockholders as long term capital gains or unrecaptured section 1250 gains. The IRS has the authority to prescribe, but has not yet prescribed, regulations that would apply a capital gain tax rate of 25% (which is generally higher than the long-term capital gain tax rates for non-corporate taxpayers) to a portion of capital gain realized by a non-corporate stockholder on the sale of REIT stock that would correspond to the REIT's "unrecaptured Section 1250 gain." In addition, the characterization of income as capital gain or ordinary income may affect the deductibility of capital losses. A non-corporate taxpayer may deduct capital losses not offset by capital gains against its ordinary income only up to a maximum annual amount of $3,000. A non-corporate taxpayer may carry forward unused capital losses indefinitely. A corporate taxpayer must pay tax on its net capital gain at ordinary corporate rates (currently up to 35%). A corporate taxpayer can deduct capital losses only to the extent of capital gains, with unused losses being carried back three years and forward five years.

        If a U.S. stockholder recognizes a loss upon a subsequent disposition of our stock in an amount that exceeds a prescribed threshold, it is possible that the provisions of certain Treasury Regulations involving "reportable transactions" could apply, with a resulting requirement to separately disclose the loss generating transactions to the IRS. While these regulations are directed towards "tax shelters," they are written quite broadly, and apply to transactions that would not typically be considered tax shelters. Significant penalties apply for failure to comply with these requirements. You should consult your tax advisors concerning any possible disclosure obligation with respect to the receipt or disposition of our stock, or transactions that might be undertaken directly or indirectly by us. Moreover, you should be aware that we and other participants in transactions involving us (including our advisors) might be subject to disclosure or other requirements pursuant to these regulations.

        Medicare Tax.    A U.S. person that is an individual is subject to a 3.8% tax on the lesser of (1) the U.S. person's "net investment income" for the relevant taxable year and (2) the excess of the U.S. person's modified gross income for the taxable year over a certain threshold (which currently is between $125,000 and $250,000, depending on the individual's circumstances). Estates and trusts that do not fall into a special class of trusts that is exempt from such tax are subject to the same 3.8% tax on the lesser of their undistributed net investment income and the excess of their adjusted gross income over a certain threshold. Net investment income generally includes dividends on our stock and gain from the sale of our stock. If you are a U.S. person that is an individual, estate or trust, you are urged to consult your tax advisors regarding the applicability of this tax to your income and gains in respect of your investment in our common or preferred stock.

        Information Reporting and Backup Withholding.    We will report to our stockholders and to the IRS the amount of distributions we pay during each calendar year, and the amount of tax we withhold, if

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any. Under the backup withholding rules, a stockholder may be subject to backup withholding at a current rate of up to 28% with respect to distributions unless the holder:

        A stockholder who does not provide us with its correct taxpayer identification number also may be subject to penalties imposed by the IRS. Any amount paid as backup withholding will be creditable against the stockholder's income tax liability. In addition, we may be required to withhold a portion of any dividends or capital gain distributions to any stockholders who fail to certify their non-foreign status to us. For a discussion of the backup withholding rules as applied to non-U.S. stockholders, see "—Taxation of Non-U.S. Stockholders."

Taxation of Tax-Exempt Stockholders

        Tax-exempt entities, including qualified employee pension and profit sharing trusts and individual retirement accounts, generally are exempt from federal income taxation. However, they are subject to taxation on their unrelated business taxable income. Subject to the exceptions described below, a tax-exempt stockholder generally would not recognize unrelated business taxable income as a result of an investment in our common or preferred stock. However, if a tax-exempt stockholder were to finance its acquisition of common or preferred stock with debt, a portion of the income that it receives from us and a portion of the gain on sale of our common or preferred stock could constitute unrelated business taxable income pursuant to the "debt-financed property" rules. Furthermore, social clubs, voluntary employee benefit associations, supplemental unemployment benefit trusts, and qualified group legal services plans that are exempt from taxation under special provisions of the federal income tax laws are subject to different unrelated business taxable income rules, which generally will require them to characterize distributions that they receive from us as unrelated business taxable income. Finally, in certain circumstances, a qualified employee pension or profit sharing trust that owns more than 10% of our stock by value at any time during a taxable year must treat a percentage of the dividends that it receives from us for the taxable year as unrelated business taxable income. Such percentage is equal to the gross income we derive from an unrelated trade or business, determined as if we were a pension trust, divided by our total gross income for the year in which we pay the dividends. That rule applies to a pension trust holding more than 10% of our shares by value only if:

Taxation of Non-U.S. Stockholders

        The rules governing U.S. federal income taxation of nonresident alien individuals and foreign corporations ("Non-U.S. Holders") are complex. This section is only a summary of such rules. We urge

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Non-U.S. Holders to consult their own tax advisors to determine the impact of federal, state, and local income tax laws on ownership of our stock, including any reporting requirements.

        Dividends.    A Non-U.S. Holder who receives a distribution that is not attributable to gain from our sale or exchange of United States real property interests, or USRPIs, as defined below, and that we do not designate as a capital gain dividend or retained capital gain will recognize ordinary income to the extent that we pay the distribution out of our current or accumulated earnings and profits. A withholding tax equal to 30% of the gross amount of the dividend (including any portion of any dividend that is payable in our stock) ordinarily will apply unless an applicable tax treaty reduces or eliminates the tax. Under many treaties, lower withholding tax rates do not apply to dividends from REITs (or are not as favorable for REIT dividends as compared to non-REIT dividends). However, if a distribution is treated as effectively connected with the Non-U.S. Holder's conduct of a United States trade or business, the Non-U.S. Holder generally will be subject to U.S. federal income tax on the distribution at graduated rates, in the same manner as U.S. Holders are taxed on distributions, and in the case of a corporate Non-U.S. Holder also may be subject to a branch profits tax at the rate of 30% (or lower treaty rate). We plan to withhold U.S. federal income tax at the rate of 30% on the gross amount of any distribution paid to a Non-U.S. Holder unless either:

        Any distribution we make that exceeds our current and accumulated earnings and profits will be treated first as a tax-free return of capital, reducing the Non-U.S. Holder's tax basis in our stock to the extent thereof, and thereafter as gain recognized as if the Non-U.S. Holder sold our stock. Any amount treated as gain recognized on a sale of our stock will be subject to U.S. federal income tax if the Non-U.S. Holder would be subject to tax on an actual sale of our stock, as discussed below. Because we generally cannot determine at the time we make a distribution whether the distribution will exceed our current and accumulated earnings and profits, we normally will withhold tax on the entire amount of a distribution at the same rate we would withhold on a dividend. However, amounts so withheld are creditable against the Non-U.S. Holder's U.S. federal income tax liability, if any, or are refundable by the IRS to the extent the Non-U.S. Holder has overpaid its U.S. federal income tax liability. We are also required to withhold 15% of any distribution in excess of our current and accumulated earnings and profits if our stock is a United States real properly interest.

        Except as discussed below with respect to 10% or less holders of regularly traded classes of stock, "qualified shareholders" and "qualified foreign pension funds," for any year in which we qualify as a REIT, a Non-U.S. Holder will be subject to tax on distributions by us that are attributable to gain from our sale or exchange of USRPIs under special provisions of the U.S. federal income tax laws known as the Foreign Investment in Real Property Act, or FIRPTA. The term USRPIs includes interests in U.S. real property and shares in corporations at least 50% of whose real estate and business assets consist of interests in U.S. real property. Under those rules, a Non-U.S. Holder is taxed on distributions by us attributable to gain from sales of USRPIs as if the gain were effectively connected with a U.S. trade or business of the Non-U.S. Holder. A Non-U.S. Holder thus would be taxed on such a distribution at regular tax rates applicable to U.S. Holders, subject to any applicable alternative minimum tax. A corporate Non-U.S. Holder not entitled to treaty relief or exemption also may be subject to the 30% branch profits tax on such a distribution. We must withhold 35% of any distribution that we could designate as a capital gain dividend and is a distribution attributable to USRPI gain and may be required to withhold 35% of any of other capital gain dividends. A Non-U.S. Holder may receive a credit against its tax liability for the amount we withhold. However, FIRPTA and the 35% withholding tax will not apply to any distribution with respect to any class of our stock that is regularly traded on

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an established securities market located in the United States if the recipient Non-U.S. Holder did not own more than 10% of such class of stock at any time during the one-year period ending on the date of distribution. Instead, any capital gain dividend will be treated as an ordinary distribution subject to the rules discussed above, which generally impose a 30% withholding tax (unless reduced by a treaty).

        Although the law is not clear on the matter, it appears that amounts designated by us as undistributed capital gains generally should be treated with respect to Non-U.S. Holders in the same manner as actual distributions by us of capital gain dividends. Under that approach, the Non-U.S. Holders would be able to offset as a credit against their U.S. federal income tax liability resulting therefrom an amount equal to their proportionate share of the tax paid by us on the undistributed capital gains and to receive from the IRS a refund to the extent their proportionate share of this tax paid by us exceeds their actual U.S. federal income tax liability.

        Dispositions of Stock.    A Non-U.S. Holder generally will not incur tax under FIRPTA with respect to gain on a disposition of our common stock or preferred stock as long as at all times during the 5-year period ending on the date of disposition non-U.S. persons hold, directly or indirectly, less than 50% in value of our stock. For these purposes, a person holding less than 5% of our regularly traded classes of stock for five years will be treated as a U.S. person unless we have actual knowledge that such person is not a U.S. person. Because our common stock is publicly traded, we cannot assure you that our non-U.S. ownership is less than 50% at any time. Even if our non-U.S. ownership remains under 50% for 5 years and we otherwise meet the requirements of this rule, pursuant to "certain wash sale" rules under FIRPTA, a Non-U.S. Holder may incur tax under FIRPTA to the extent such stockholder disposes of our stock within a certain period prior to a distribution attributable to USRPI gain and directly or indirectly (including through certain affiliates) reacquires our stock within certain prescribed periods, provided that this rule will not apply to a disposition and reacquisition of our stock by a Non-U.S. Holder owning, actually or constructively, 10% or less of our stock at any time during the one-year period ending on the date of such distribution attributable to USRPI gain.

        Regardless of the extent of our non-U.S. ownership, a Non-U.S. Holder will not incur tax under FIRPTA on a disposition of the shares of our publicly traded stock if such Non-U.S. Holder owned, actually or constructively, at all times during a specified testing period, 10% or less of the total fair market value of such class of stock. The testing period is the shorter of (1) the period during which the Non-U.S. Holder held the shares and (2) the five-year period ending on the disposition date. For as long as our stock is regularly traded on an established securities market, a Non-U.S. Holder should not incur tax under FIRPTA with respect to gain on a sale of such stock unless it owns, actually or constructively, more than 10% of our stock during such testing period.

        To the extent our stock is held directly (or indirectly through one or more partnerships) by a "qualified shareholder," it will not be treated as a USRPI. Further, to the extent such treatment applies, any distribution to such shareholder will not be treated as gain recognized from the sale or exchange of a USRPI. For these purposes, a qualified shareholder is generally a Non-U.S. Holder that (i)(A) is eligible for treaty benefits under an income tax treaty with the United States that includes an exchange of information program, and the principal class of interests of which is listed and regularly traded on one or more stock exchanges as defined by the treaty, or (B) is a foreign limited partnership organized in a jurisdiction with an exchange of information agreement with the United States and that has a class of regularly traded limited partnership units (having a value greater than 50% of the value of all partnership units) on the New York Stock Exchange or Nasdaq, (ii) is a "qualified collective investment vehicle" (within the meaning of section 897(k)(3)(B) of the Code) and (iii) maintains records of persons holding 5% or more of the class of interests described in clauses (i)(A) or (i)(B) above. However, in the case of a qualified shareholder having one or more "applicable investors," the exception described in the first sentence of this paragraph will not apply with respect to a portion of the qualified shareholder's stock (determined by applying the ratio of the value of the interests held by applicable investors in the qualified shareholder to the value of all interests in the qualified shareholder

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and applying certain constructive ownership rules). Such ratio applied to the amount realized by a qualified shareholder on the disposition of our stock or with respect to a distribution from us attributable to gain from the sale or exchange of a USRPI will be treated as amounts realized from the disposition of USRPIs. Such treatment shall also apply to applicable investors in respect of distributions treated as a sale or exchange of stock with respect to a qualified shareholder. For these purposes, an "applicable investor" is person who holds an interest in the qualified shareholder and holds more than 10% of our stock applying certain constructive ownership rules.

        The FIRPTA rules do not apply to our common or preferred stock held directly (or indirectly through one or more partnerships) by, or to any distribution we make to, a "qualified foreign pension fund" or any entity all of the interests of which are held by a qualified foreign pension fund. For these purposes, a "qualified foreign pension fund" is an organization or arrangement (i) created or organized in a foreign country, (ii) established to provide retirement or pension benefits to current or former employees (or their designees) of one or more employers for services rendered, (iii) which does not have a single participant or beneficiary that has a right to more than 5% of its assets or income, (iv) which is subject to government regulation and provides annual information reporting about its beneficiaries to relevant local tax authorities and (v) with respect to which, under its local laws, contributions that would otherwise be subject to tax are deductible or excluded from its gross income or taxed at a reduced rate, or taxation of its income is deferred or taxed at a reduced rate. To benefit from these rules, an investor will be required to provide an appropriate certification that it not a foreign person for purposes of FIRPTA by reason of being a qualified foreign pension fund or an entity wholly owned by a qualified foreign pension fund.

        FATCA Withholding on Certain Foreign Accounts and Entities.    The Foreign Account Tax Compliance Act, or FATCA, together with administrative guidance and certain intergovernmental agreements entered into thereunder, impose a 30% withholding tax on certain types of payments made to "foreign financial institutions" and certain other non-U.S. entities unless (i) the foreign financial institution undertakes certain diligence and reporting obligations or (ii) the foreign non-financial entity either certifies it does not have any substantial United States owners or furnishes identifying information regarding each substantial United States owner. If the payee is a foreign financial institution that is not subject to special treatment under certain intergovernmental agreements, it must enter into an agreement with the United States Treasury requiring, among other things, that it undertakes to identify accounts held by certain United States persons or United States-owned foreign entities, annually report certain information about such accounts, and withhold 30% on payments to account holders whose actions prevent them from complying with these reporting and other requirements. Investors in jurisdictions that have entered into intergovernmental agreements may, in lieu of the foregoing requirements, be required to report such information to their home jurisdictions. Withholding under FATCA will apply after December 31, 2018 with respect to the gross proceeds from a disposition of property that can produce U.S. source interest or dividends and began after June 30, 2014 with respect to other withholdable payments. Prospective investors should consult their tax advisors regarding this legislation.

        Information Reporting and Backup Withholding.    Generally, we must report annually to the IRS the amount of dividends paid to a Non-U.S. Holder, such holder's name and address, and the amount of tax withheld, if any. A similar report is sent to the Non-U.S. Holder. Pursuant to tax treaties or other agreements, the IRS may make its reports available to tax authorities in the Non-U.S. Holder's country of residence.

        Payments of dividends or of proceeds from the disposition of stock made to a Non-U.S. Holder may be subject to information reporting and backup withholding unless such holder establishes an exemption, for example, by properly certifying its non-United States status on an IRS Form W-8BEN, IRS Form W-8BEN-E or another appropriate version of IRS Form W-8. Notwithstanding the

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foregoing, backup withholding may apply if either we or our paying agent has actual knowledge, or reason to know, that a Non-U.S. Holder is a United States person.

        Backup withholding is not an additional tax. Rather, the United States income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund or credit may be obtained, provided the required information is furnished to the IRS.

Legislative or Other Actions Affecting REITs

        The rules dealing with U.S. federal income taxation are constantly under review by persons involved in the legislative process and by the IRS and the U.S. Treasury Department. No assurance can be given as to whether, when, or in what form, U.S. federal income tax laws applicable to us and our stockholders may be enacted, amended or repealed. Changes to the U.S. federal income tax laws and to interpretations of the U.S. federal income tax laws could adversely affect an investment in our common stock or preferred stock.

State, Local and Non-U.S. Taxes

        We and/or holders of our stock may be subject to state, local and non-U.S. taxation in various state or local or non-U.S. jurisdictions, including those in which we or they transact business or reside. The non-U.S., state and local tax treatment of us and of holders of our stock may not conform to the U.S. federal income tax considerations discussed above. Consequently, prospective investors should consult their own tax advisors regarding the effect of state, local and non-U.S. tax laws on an investment in our common stock or preferred stock.

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PLAN OF DISTRIBUTION

Sales by Us

        We may sell the securities in any one or more of the following ways:

        TIER REIT, Inc. common stock or preferred stock may be issued upon conversion of debt securities or preferred stock of TIER REIT, Inc. or in exchange for debt securities of Tier Operating Partnership LP. Securities may also be issued upon exercise of warrants of TIER REIT, Inc. TIER REIT, Inc. and Tier Operating Partnership LP reserve the right to sell securities directly to investors on their own behalf in those jurisdictions where they are authorized to do so.

        If we sell securities to a dealer acting as principal, the dealer may resell such securities at varying prices to be determined by such dealer in its discretion at the time of resale without consulting with us and such resale prices may not be disclosed in the applicable prospectus supplement.

        Any underwritten offering may be on a best efforts or a firm commitment basis. We may also offer securities through subscription rights distributed to our stockholders on a pro rata basis, which may or may not be transferable. In any distribution of subscription rights to stockholders, if all of the underlying securities are not subscribed for, we may then sell the unsubscribed securities directly to third parties or may engage the services of one or more underwriters, dealers or agents, including standby underwriters, to sell the unsubscribed securities to third parties.

        Sales of the securities may be effected from time to time in one or more transactions, including negotiated transactions:

        Any of the prices may represent a discount from the then prevailing market prices.

        In the sale of the securities, underwriters or agents may receive compensation from us in the form of underwriting discounts or commissions and may also receive compensation from purchasers of the securities, for whom they may act as agents, in the form of discounts, concessions or commissions. Underwriters may sell the securities to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agents. Discounts, concessions and commissions may be changed from time to time. Dealers and agents that participate in the distribution of the securities may be deemed to be underwriters under the Securities Act, and any discounts, concessions or commissions they receive from us and any profit on the resale of securities they realize may be deemed to be underwriting compensation under applicable federal and state securities laws.

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        The applicable prospectus supplement will, where applicable:

        Unless otherwise specified in the related prospectus supplement, each series of securities will be a new issue with no established trading market, other than shares of common stock of TIER REIT, Inc., which are listed on the NYSE. Any common stock sold pursuant to a prospectus supplement will be listed on the NYSE, subject to official notice of issuance. We may elect to list any series of preferred stock on an exchange, but we are not obligated to do so. It is possible that one or more underwriters may make a market in the securities, but such underwriters will not be obligated to do so and may discontinue any market making at any time without notice. No assurance can be given as to the liquidity of, or the trading market for, any offered securities.

        We may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If disclosed in the applicable prospectus supplement, in connection with those derivative transactions third parties may sell securities covered by this prospectus and such prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or from others to settle those short sales or to close out any related open borrowings of securities, and may use securities received from us in settlement of those derivative transactions to close out any related open borrowings of securities. If the third party is or may be deemed to be an underwriter under the Securities Act, it will be identified in the applicable prospectus supplements.

        Until the distribution of the securities is completed, rules of the SEC may limit the ability of any underwriters and selling group members to bid for and purchase the securities. As an exception to these rules, underwriters are permitted to engage in some transactions that stabilize the price of the securities. Such transactions consist of bids or purchases for the purpose of pegging, fixing or maintaining the price of the securities.

        Underwriters may engage in overallotment. If any underwriters create a short position in the securities in an offering in which they sell more securities than are set forth on the cover page of the applicable prospectus supplement, the underwriters may reduce that short position by purchasing the securities in the open market.

        The lead underwriters may also impose a penalty bid on other underwriters and selling group members participating in an offering. This means that if the lead underwriters purchase securities in the open market to reduce the underwriters' short position or to stabilize the price of the securities, they may reclaim the amount of any selling concession from the underwriters and selling group members who sold those securities as part of the offering.

        In general, purchases of a security for the purpose of stabilization or to reduce a short position could cause the price of the security to be higher than it might be in the absence of such purchases. The imposition of a penalty bid might also have an effect on the price of a security to the extent that it were to discourage resales of the security before the distribution is completed.

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        We do not make any representation or prediction as to the direction or magnitude of any effect that the transactions described above might have on the price of the securities. In addition, we do not make any representation that underwriters will engage in such transactions or that such transactions, once commenced, will not be discontinued without notice.

        Under agreements into which we may enter, underwriters, dealers and agents who participate in the distribution of the securities may be entitled to indemnification by us against or contribution towards certain civil liabilities, including liabilities under the applicable securities laws.

        Underwriters, dealers and agents may engage in transactions with us, perform services for us or be our tenants in the ordinary course of business.

        If indicated in the applicable prospectus supplement, we will authorize underwriters or other persons acting as our agents to solicit offers by particular institutions to purchase securities from us at the public offering price set forth in such prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on the date or dates stated in such prospectus supplement. Each delayed delivery contract will be for an amount no less than, and the aggregate amounts of securities sold under delayed delivery contracts shall be not less nor more than, the respective amounts stated in the applicable prospectus supplement. Institutions with which such contracts, when authorized, may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and others, but will in all cases be subject to our approval. The obligations of any purchaser under any such contract will be subject to the conditions that (a) the purchase of the securities shall not at the time of delivery be prohibited under the laws of any jurisdiction in the United States to which the purchaser is subject, and (b) if the securities are being sold to underwriters, we shall have sold to the underwriters the total amount of the securities less the amount thereof covered by the contracts. The underwriters and such other agents will not have any responsibility in respect of the validity or performance of such contracts.

        To comply with applicable state securities laws, the securities offered by this prospectus will be sold, if necessary, in such jurisdictions only through registered or licensed brokers or dealers. In addition, securities may not be sold in some states unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

        Underwriters, dealers or agents that participate in the offer of securities, or their affiliates or associates, may have engaged or engage in transactions with and perform services for, TIER REIT, Inc., Tier Operating Partnership LP or our affiliates in the ordinary course of business for which they may have received or receive customary fees and reimbursement of expenses.


LEGAL MATTERS

        The validity of the securities offered by means of this prospectus and certain U.S. federal income tax matters have been passed upon for us by Goodwin Procter LLP.


EXPERTS

        The consolidated financial statements, and the related financial statement schedules of TIER REIT, Inc. and subsidiaries, incorporated in this prospectus by reference from our Annual Report on Form 10-K, have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report (which report expresses an unqualified opinion and includes an explanatory paragraph regarding the adoption of Financial Accounting Standards Board Accounting Standards Update No. 2014-08, Presentation of Financial Statements and Property, Plant, and Equipment (Topics 205 and 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity), which is incorporated herein by reference. Such consolidated financial statements and financial statement schedules have been so incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

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$125,000,000

TIER REIT, Inc.

Common Stock



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