UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.     )
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EQUITY COMMONWEALTH
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*** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on June 16, 2015. Meeting Information EQUITY COMMONWEALTH Meeting Type: Annual Meeting For holders as of: April 20, 2015 Date: June 16, 2015 Time: 8:00 a.m. Central Time Location: 540 West Madison Street Conference Center, 23rd Floor, Room E Chicago, IL 60661 You are receiving this communication because you hold shares in the company named above. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting. EQUITY COMMONWEALTH TWO NORTH RIVERSIDE PLAZA SUITE 600 CHICAGO, IL 60606 M92373-P65271 See the reverse side of this notice to obtain proxy materials and voting instructions.

Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: Proxy Materials Available to VIEW or RECEIVE: ANNUAL REPORT PROXY STATEMENT How to View Online: Have the information that is printed in the box marked by the arrow (located on the following page) and visit: www.proxyvote.com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request: 1) BY INTERNET: www.proxyvote.com 2) BY TELEPHONE: 1-800-579-1639 3) BY E-MAIL*: sendmaterial@proxyvote.com * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow (located on the following page) in the subject line. . XXXX XXXX XXXX XXXX . XXXX XXXX XXXX XXXX Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before June 2, 2015 to facilitate timely delivery. How To Vote M92374-P65271 Please Choose One of the Following Voting Methods Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow (located on the following page) available and follow the instructions. Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card. . XXXX XXXX XXXX XXXX

Voting Items Our Board of Trustees Recommends You Vote “FOR” the Nominees for Trustee in Proposal 1 and “FOR” Proposals 2, 3 and 4. 1. To elect the nominees named in our proxy statement to our Board of Trustees 01) Sam Zell 02) James S. Corl 03) Martin L. Edelmen 04) Edward A. Glickman 05) David Helfand 06) Peter Linneman 07) James L. Lozier, Jr. 08) Mary Jane Robertson 09) Kenneth Shea 10) Gerald A. Spector 11) James A. Star Our Board recommends you vote "FOR" Proposal 1. 2. To approve the Equity Commonwealth 2015 Omnibus Incentive Plan. Our Board recommends you vote "FOR" Proposal 2. 3. To approve, on a non-binding advisory basis, the compensation of our named executive officers. Our Board recommends you vote "FOR" Proposal 3. 4. To ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2015. Our Board recommends you vote "FOR" Proposal 4. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE PROXIES, IN THEIR DISCRETION, ARE AUTHORIZED TO VOTE AND OTHERWISE REPRESENT THE UNDERSIGNED ON SUCH OTHER MATTERS AS MAY PROPERLY COME BEFORE THE MEETING OR AT ANY POSTPONEMENT OR ADJOURNMENT THEREOF. M92375-P65271

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