<ACCESSION-NUMBER>0000932471-19-004900 <TYPE>SC 13G/A <PUBLIC-DOCUMENT-COUNT>1 <FILING-DATE>20190211 <DATE-OF-FILING-DATE-CHANGE>20190211 <SUBJECT-COMPANY> <COMPANY-DATA> <CONFORMED-NAME>Equity Commonwealth <CIK>0000803649 <ASSIGNED-SIC>6798 <IRS-NUMBER>046558834 <STATE-OF-INCORPORATION>MD <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>SC 13G/A <ACT>34 <FILE-NUMBER>005-37896 <FILM-NUMBER>19583510 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>TWO NORTH RIVERSIDE PLAZA <STREET2>SUITE 2100 <CITY>CHICAGO <STATE>IL <ZIP>60606 <PHONE>312.646.2800 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>TWO NORTH RIVERSIDE PLAZA <STREET2>SUITE 2100 <CITY>CHICAGO <STATE>IL <ZIP>60606 </MAIL-ADDRESS> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>CommonWealth REIT <DATE-CHANGED>20100702 </FORMER-COMPANY> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>HRPT PROPERTIES TRUST <DATE-CHANGED>19980701 </FORMER-COMPANY> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>HEALTH & RETIREMENT PROPERTIES TRUST <DATE-CHANGED>19940811 </FORMER-COMPANY> </SUBJECT-COMPANY> <FILED-BY> <COMPANY-DATA> <CONFORMED-NAME>VANGUARD GROUP INC <CIK>0000102909 <IRS-NUMBER>231945930 <STATE-OF-INCORPORATION>PA <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>SC 13G/A </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>PO BOX 2600 <STREET2>V26 <CITY>VALLEY FORGE <STATE>PA <ZIP>19482-2600 <PHONE>6106691000 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>PO BOX 2600 <STREET2>V26 <CITY>VALLEY FORGE <STATE>PA <ZIP>19482-2600 </MAIL-ADDRESS> </FILED-BY>