FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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 *   Sorenson Christa L 2. Date of Event Requiring Statement (Month/Day/Year) 12/17/2015 3. Issuer Name and Ticker or Trading Symbol EQUITY RESIDENTIAL [EQR] (Last) (First) (Middle) TWO NORTH RIVERSIDE PLAZA, SUITE 400 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Vice President 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CHICAGO, IL 60606 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Shares Of Beneficial Interest 4,294 (1) D   Common Shares Of Beneficial Interest 184 (2) I 401(k) Plan

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-qualified Stock Option (Right to Buy)	02/05/2013	02/05/2020	Common Shares Of Beneficial Interest	2,051	$ 32.97	D	Â
Non-qualified Stock Option (Right to Buy)	02/07/2014	02/07/2021	Common Shares Of Beneficial Interest	3,884	$ 53.71	D	Â
Non-qualified Stock Option (Right to Buy)	02/03/2015	02/03/2022	Common Shares Of Beneficial Interest	1,267	$ 60.25	D	Â
Non-qualified Stock Option (Right to Buy)	  (3)	02/07/2023	Common Shares Of Beneficial Interest	4,272	$ 54.82	D	Â
Non-qualified Stock Option (Right to Buy)	  (4)	02/06/2024	Common Shares Of Beneficial Interest	2,006	$ 56.48	D	Â
Non-qualified Stock Option (Right to Buy)	  (5)	02/05/2025	Common Shares Of Beneficial Interest	1,322	$ 80.27	D	Â
Restricted Units	  (6)	02/05/2025	Common Shares Of Beneficial Interest	336	$ (7)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Sorenson Christa L TWO NORTH RIVERSIDE PLAZA, SUITE 400 CHICAGO, IL 60606	Â	Â	  Executive Vice President	Â

Signatures

s/ By: Jane Matz, Attorney-in-fact		12/28/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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 December 20, 2015.
(3)	Represents share options scheduled to vest in three equal installments on February 7, 2014, February 7, 2015 and February 7, 2016.
(4)	Represents share options scheduled to vest in approximately three equal installments on February 6, 2015, February 6, 2016 and February 6, 2017.
(5)	Represents share options scheduled to vest in approximately three equal installments on February 5, 2016, February 5, 2017 and February 5, 2018.
(6)	The Restricted Units are scheduled to vest on February 5, 2018.
(7)	On February 5, 2015, the reporting person received a grant of restricted limited partnership interests ("Restricted Units") in ERP Operating Limited Partnership (the "Operating Partnership"), the operating partnership of Equity Residential (the "Company") as part of the Company's annual grant of long-term compensation. The reporting person made a payment to the Operating Partnership of $0.50 for each Restricted Unit awarded. Restricted 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 Restricted 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 and certain other restrictions, OP Units are exchangeable 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 Restricted Units reflected in this report also include any OP Units into which such Restricted Units automatically convert.

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