About ZipcarZipcar is the world's leading car-sharing network with more than 777,000 members and 9,700 vehicles in urban areas and college campuses throughout the United States, Canada, the United Kingdom, Spain and Austria. Zipcar offers more than 30 makes and models of self-service vehicles by the hour or day to residents and businesses looking for an alternative to the high costs and hassles of owning a car. More information is available at www.zipcar.com. Zipcar and the Zipcar logo are trademarks of Zipcar, Inc. Other company and product names may be trademarks of their respective owners. Non-GAAP Financial Measures This press release contains the non-GAAP financial measure of Adjusted EBITDA. Zipcar defines Adjusted EBITDA as earnings before non-vehicle depreciation, non-vehicle interest expense, interest income, amortization, preferred stock warrant liability adjustment, stock compensation expenses, acquisition and integration costs, taxes, including the benefit from the release of the valuation allowance, loss of equity-method investee, other income related to Zero Emission Vehicle (ZEV) credits and other gains or losses associated with events of a non-recurring nature, such as costs related to Hurricane Sandy and transaction costs related to the Merger Agreement. The Company believes that this non-GAAP measure is an important measure of its operating performance because it allows management, investors and analysts to evaluate and assess the Company's core operating results from period to period after removing the impact of changes in the Company's capital structure, income tax status and method of vehicle financing, and other items of a non-operational nature that affect comparability. The Company includes vehicle-related depreciation and interest in its definition of Adjusted EBITDA because vehicles represent core operating assets used in the delivery of the Company's service that require periodic replacement. In addition, the exclusion of these costs would result in a lack of comparability in the treatment of vehicles that are owned or leased under capital leases and those leased under operating leases. The Company believes that various forms of the Adjusted EBITDA metric are often used by analysts, investors and other interested parties to evaluate companies such as Zipcar for the reasons discussed above. Adjusted EBITDA is also used for planning purposes and in presentations to the Company's board of directors as well as in the Company's annual incentive compensation program for senior management.