Booz Allen Hamilton Holding Corporation (“Booz Allen”)(NYSE: BAH), the parent company of management consulting, technology, and engineering services firm Booz Allen Hamilton Inc., today announced the closing of the previously announced secondary public offering of shares of Class A common stock (“common stock”) by an affiliate of The Carlyle Group (“Carlyle”), at a price to the public of $17.00 per share. Carlyle sold 12,650,000 shares of common stock to the underwriters, including 1,650,000 shares of common stock pursuant to the exercise of the underwriters’ option to purchase additional shares. Following this offering, Carlyle beneficially owns approximately 58.3% of the outstanding Class A common stock of Booz Allen. Booz Allen did not sell any shares of common stock in the offering and did not receive any of the proceeds. Barclays, Credit Suisse, Morgan Stanley, BofA Merrill Lynch, Citigroup and J.P. Morgan acted as bookrunners for the offering. Raymond James, Stifel, BB&T Capital Markets, Drexel Hamilton, and SMBC Nikko acted as co-managers for the offering. The offering was made only by means of a prospectus, copies of which may be obtained from: Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, (888) 603-5847, email: email@example.com; Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, New York 10010, (800) 221-1037, email: firstname.lastname@example.org; and Morgan Stanley & Co. LLC, Attention: Prospectus department, 180 Varick Street, 2nd Floor, New York, NY 10014, or by calling (866) 718-1649, email: email@example.com. This press release shall not constitute an offer to sell or the solicitation of any offer to buy, nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of such jurisdiction.