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 commencement of a secondary public offering of 10,000,000 shares of Class A common stock (“common stock”) by an affiliate of The Carlyle Group (“Carlyle”). In addition, the underwriters will have a 30-day option to purchase an aggregate of up to 1,500,000 additional shares of common stock from Carlyle. Upon completion of the offering, Carlyle will beneficially own approximately 60.2% of the outstanding common stock of Booz Allen, or approximately 59.2% if the underwriters fully exercise their option to purchase additional shares. Booz Allen is not selling any shares of common stock in the offering and will not receive any of the proceeds. Barclays, Credit Suisse, Morgan Stanley, Bank of America Merrill Lynch, Citigroup and J.P. Morgan are acting as bookrunners for the offering. BB&T, Raymond James, Stifel, Drexel Hamilton, and SMBC Nikko are acting as co-managers for the offering. A shelf registration statement (including a prospectus) relating to the offering of the common stock has previously been filed with the U.S. Securities and Exchange Commission and has become effective. Before investing, interested parties should read the prospectus and other documents filed with the Securities and Exchange Commission for information about Booz Allen and this offering. A copy of the prospectus 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; and Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, New York 10010, (800) 221-1037, email: firstname.lastname@example.org. 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.