X0203 3/A 2011-04-08 2011-04-08 0 0001131457 ZIPCAR INC ZIP 0001094581 CASE STEPHEN M C/O REVOLUTION LIVING LLC 1717 RHODE ISLAND AVE., N.W. SUITE 1000 WASHINGTON DC 20036 1 0 1 0 0001335831 Revolution Living LLC 1717 RHODE ISLAND AVE., N.W. SUITE 1000 WASHINGTON DC 20036 1 0 1 0 Series F Convertible Preferred Stock Common Stock 6852175 I See Footnote Each share of Series F Convertible Preferred Stock will convert into 0.5 shares of common stock upon the closing of Zipcar, Inc.'s initial public offering of common stock. Reflects a 1-for-2 reverse stock split of the common stock of Zipcar, Inc., which became effective on March 29, 2011. Not Applicable. These are shares owned directly by Revolution Living LLC. Mr. Case is the Manager, Chairman and Chief Executive Officer of Revolution Living LLC. Mr. Case has the sole power to vote and dispose of the shares of the Issuer held by Revolution Living LLC. All information on this report was previously included on a Form 3 filed on April 8, 2011. This amendment is being filed solely to add the Power of Attorney as Exhibit 24. /s/ Ronald A. Klain, attorney-in-fact 2011-04-12