Ownership Submission
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 *
  MAHONEY JOHN
2. Date of Event Requiring Statement (Month/Day/Year)
04/13/2011
3. Issuer Name and Ticker or Trading Symbol
ZIPCAR INC [ZIP]
(Last)
(First)
(Middle)
C/O ZIPCAR, INC., 25 FIRST STREET, 4TH FLOOR
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CAMBRIDGE, MA 02141
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 Stock 69,348 (1)
I
See Footnotes (2) (3)

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
Stock Option (right to buy)   (4) 10/20/2020 Common Stock 32,650 (5) $ 10.98 (5) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
MAHONEY JOHN
C/O ZIPCAR, INC.
25 FIRST STREET, 4TH FLOOR
CAMBRIDGE, MA 02141
  X      

Signatures

/s/ John J. Mahoney, Jr. 04/08/2011
**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) Reflects a 1-for-2 reverse stock split of the common stock of Zipcar, Inc., which became effective on March 29, 2011, pursuant to which each share of common stock was reduced by half.
(2) Held by the John Mahoney 2011 Qualified Annuity Trust, of which Mr. Mahoney is trustee.
(3) Mr. Mahoney disclaims beneficial ownership of the shares held by the John Mahoney 2011 Qualified Annuity Trust, except to the extent of his pecuniary interest therein.
(4) This option becomes exercisable in 48 equal monthly installments following October 20, 2010.
(5) Reflects a 1-for-2 reverse stock split of the common stock of Zipcar, Inc., which became effective on March 29, 2011, pursuant to which (i) the number of shares of common stock underlying this option was reduced by half and (ii) the exercise price of this option was doubled.
 
Remarks:
Exhibit 24 - Power of Attorney

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