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Section 1: SC 13G/A


UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC  20549

SCHEDULE 13G


Under the Securities Exchange Act of 1934
(Amendment No. 39)



Illinois Tool Works, Inc.
(Name of Issuer)


Common Stock, $3.33 1/3  Par
(Title of Class of Securities)


452308 10 9
(CUSIP Number)

December 31, 2017
(Date of Event which Requires Filing of this Statement)


Check the appropriate box to designate the rule
pursuant to which this Schedule is filed:
 X	Rule 13d-1(b)
	Rule 13d-1(c)
	Rule 13d-1(d)

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CUSIP No. 452308 10 9


13G

Page    2    of    7    Pages



  1

Name of Reporting Person
S.S. or I.R.S. Identification No. of above person

	Northern Trust Corporation			36-2723087
	The Northern Trust Company			36-1561860

  2

Check the appropriate box if a member of a group

	Not Applicable	(a)	[ ]
			(b)	[ ]


  3

S.E.C. use only


  4

Citizenship or place of organization

	Northern Trust Corporation--a Delaware corporation with principal offices
 in Chicago, Illinois



Number of shares beneficially owned by each reporting person with

  5
Sole Voting Power

	9,384,971

  6
Shared Voting Power

	11,751,989

  7
Sole Dispositive Power

	3,201,680


  8
Shared Dispositive Power

	13,319,895

  9

Aggregate amount beneficially owned by each reporting person

	22,089,169

10

Check box if the aggregate amount in Row (9) excludes certain shares.


	Not Applicable

11

Percent of class represented by amount in Row 9

	6.5


12

Type of reporting person


	Northern Trust Corporation  	HC
	The Northern Trust Company	BK
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SECURITIES AND EXCHANGE COMMISSION
Washington, DC  20549

SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934

Check the following box if a fee is being paid with statement [ ].

1.	(a)	Illinois Tool Works, Inc.
		(Name of Issuer)

	(b)	155 Harlem Ave., Glenview, IL 60025
		(Address of Issuer's Principal Executive Office)

2.	(a)	Northern Trust Corporation
		(Name of Person Filing)

	(b)	50 South LaSalle Street, Chicago, Illinois 60603
		(Address of Person Filing)

	(c)	U.S. (Delaware Corporation)
		(Citizenship)

	(d)	Common Stock, $3.33 1/3  Par
		(Title of Class of Securities)

	(e)	452308 10 9
		(CUSIP Number)

3.	This statement is being filed by Northern Trust Corporation as a
 Parent Holding Company in accordance with S240.13d-1(b) (1) (ii) (G).

4.	(a)	     22,089,169
		(Amount Beneficially Owned)

	(b)	         6.5
		(Percent of Class)

	(c)	Number of shares as to which such person has:

		(i)	     9,384,971
			(Sole Power to Vote or to Direct the Vote)

		(ii)	     11,751,989
			(Shared Power to Vote or to Direct the Vote)

		(iii)	     3,201,680
			(Sole Power to Dispose or Direct Disposition)

		(iv)       13,319,895
			(Shared Power to Dispose or Direct Disposition)




5.	If this statement is being filed to report the fact that as of the date
 hereof the reporting person has ceased to be the beneficial owner of more than
 5 percent of the class of securities, check the following:  [  ]

6.	Statement regarding ownership of 5 percent or more on behalf of another:



7.	Parent Holding Company reporting on behalf of the following subsidiaries,
 all of which are banks as defined in Section 3(a) (6) of the Act:

	The Northern Trust Company
	50 South LaSalle Street
	Chicago, IL  60603


8.	Identification and Classification of Members of the Group.

Not Applicable.

9.	Notice of Dissolution of Group.

Not Applicable.

10.	By signing below I certify that, to the best of my knowledge and belief,
 the securities referred to above were acquired in the ordinary course of
 business and were not acquired for the purpose of and do not have the effect
 of changing or influencing the control of the issuer of such securities and
 were not acquired in connection with or as a participant in any transaction
 having such purpose or effect.





	After reasonable inquiry and to the best of my knowledge and belief, I certify
 that the information set forth in this statement is true, complete and correct.


							NORTHERN TRUST CORPORATION

							_________________________________
							By:  Robert P Browne
DATED:  01-03-2018	Title:Executive Vice President

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EXHIBIT TO SCHEDULE 13G AMENDMENT
FILED BY NORTHERN TRUST CORPORATION

Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, DC  20549-1004
Attention: Filing Desk, Stop 1-4

RE:  Illinois Tool Works, Inc.

Pursuant to the requirement of 240.13d-1(k) (1) (iii), this exhibit shall
 constitute our written agreement that the Schedule 13G to which this
 exhibit is attached is filed on behalf of Northern Trust Corporation and of
 its subsidiary(ies), as stated below, regarding our respective beneficial
 ownership in the above-captioned equity security.

							NORTHERN TRUST CORPORATION

							_________________________________
							By:  Robert P Browne
DATED:  01-03-2018					Title: Executive Vice President


THE NORTHERN TRUST COMPANY

________________________________________
By:  Robert P Browne
Title:    Executive Vice President

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Section 2: EX-1


Exhibit 1
Filed by Northern Trust Corporation



CERTIFIED RESOLUTION

The undersigned certifies that the undersigned is the duly appointed, qualified
and acting Secretary or Assistant Secretary of Northern Trust Corporation, as
 indicated below, and that the following resolution was duly adopted by the
Board of Directors of Northern Trust Corporation on April 25, 2017 and
remains in full force and effect:

RESOLVED, that each of the 'Executive Officers' of
Northern Trust Corporation (the 'Corporation'), as that
term is defined in Rule 3b-7 under the Securities Exchange
Act of 1934, and each of the following other officers of the
Corporation or its subsidiaries, is hereby authorized to sign,
on behalf of the Corporation, any Statements on Schedule 13G or Form 13F,
and any amendments to such Statements, required to be filed
with the Securities and Exchange Commission by the
Corporation with respect to any securities beneficially
owned by the Corporation and any of its direct or indirect
subsidiaries:
				Robert P. Browne
				James D. McDonald
				Matt Peron
				Christopher Shipley


IN WITNESS WHEREOF, the undersigned has executed this certificate on
August 1, 2017


	Bradley Gabriel
	Assistant Secretary
	Northern Trust Corporation



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