Imperva, Inc. (NYSE: IMPV) today announced that it will issue a press release reporting financial results for the first quarter ended March 31, 2012 after the close of the market on May 3, 2012. Imperva will host a conference call and live webcast to discuss those financial results for investors and analysts at 2:00 p.m. Pacific Time (5:00 p.m. Eastern Time) on May 3, 2012. To access the conference call, dial (800) 967-7141 for the U.S. or Canada and (719) 457-2643 for international callers with conference ID #1471551. The webcast will be available live on the Investors section of the company’s website at www.imperva.com. An audio replay of the call will also be available to investors by phone beginning at approximately 5:00 p.m. Pacific Time on May 3, 2012 until 8:59 p.m. Pacific Time on May 17, 2012, by dialing (877) 870-5176 for the U.S. or Canada or (858) 384-5517 for international callers, and entering passcode 1471551. In addition, an archived webcast will be available on the Investors section of the company’s website at www.imperva.com. Extension of Lock-Up Period In connection with the company’s initial public offering, the underwriters and certain holders of Imperva common stock entered into agreements restricting the sale or transfer of shares of common stock during the 180-day period following the date of the IPO prospectus. These “lock-up” agreements provide for an automatic extension in the event the company announces that it will release financial results or other material news within the last 17 days of the lock-up period or the 15-day period following the originally-scheduled expiration of the lock-up agreements (to instead extend through the 18-day period beginning on the issuance of the earnings release or the announcement of the material news or material event). These agreements were originally scheduled to expire on May 6, 2012. As a result of the company’s scheduled release of its financial results on May 3, 2012, the lock-up agreements described above will be automatically extended through May 20, 2012.