Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
TENNISON MARK N
   2. Issuer Name and Ticker or Trading Symbol
EQUITY RESIDENTIAL [EQR] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Vice President
(Last)
(First)
(Middle)
TWO NORTH RIVERSIDE PLAZA, SUITE 400		 3. Date of Earliest Transaction (Month/Day/Year)
02/03/2012
(Street)

CHICAGO, IL 60606		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Shares Of Beneficial Interest               10,881 (1) D  
Common Shares Of Beneficial Interest               232.1082 (2) I 401(k) Plan
Common Shares Of Beneficial Interest               36,717.155 (3) I SERP Account

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
LTIP Units (4) 02/03/2012   A   7,551     (5) 02/03/2015 Operating Partnership Units 7,551 $ 0 7,551 D  
Non-qualified Stock Option (Right to Buy) $ 60.25 02/03/2012   A   53,277     (6) 02/03/2022 Common Shares Of Beneficial Interest 53,277 $ 0 53,277 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
TENNISON MARK N
TWO NORTH RIVERSIDE PLAZA, SUITE 400
CHICAGO, IL 60606		       Executive Vice President  

Signatures

 s/ By: Jane Matz, Attorney-in-fact   02/07/2012
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Direct total includes restricted shares of the Company scheduled to vest in the future.
(2) Represents shares acquired through profit sharing contributions and dividend reinvestment activity in the reporting person's account with the Equity Residential Advantage 401(k) Retirement Savings Plan, a plan qualified under Section 401(k) of the Internal Revenue Code of 1986, as amended. Such shares represent acquisitions through January 13, 2012.
(3) Represents shares owned by Principal Trust Company, as Trustee of the Equity Residential Supplemental Executive Retirement Plan (the "SERP"), for the benefit of the reporting person. Also includes restricted shares that the reporting person deferred to the SERP upon vesting of the shares.
(4) On February 3, 2012, the reporting person received a grant of restricted limited partnership interests ("LTIP Units") in ERP Operating Limited Partnership (the "Operating Partnership"), the operating partnership of Equity Residential (the "Company"), in lieu of restricted shares of the Company as part of the Company's annual grant of long-term compensation. LTIP Units are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("OP Units") when the capital account related to the LTIP Units reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to any vesting requirements of the grant, OP Units are redeemable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The LTIPs reflected in this report also include any OP Units into which such LTIP Units automatically convert.
(5) The LTIP Units are scheduled to vest on February 3, 2015.
(6) Represents share options scheduled to vest in three equal installments on February 3, 2013, February 3, 2014 and February 3, 2015.

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