INDIANAPOLIS, March 20, 2012 /PRNewswire/ -- Allison Transmission Holdings, Inc. (NYSE: ALSN) announced today the closing of its previously announced initial public offering of 26,100,000 shares of its common stock at a price to the public of $23.00 per share. In connection with the initial public offering, the underwriters exercised in full their option to purchase an additional 3,915,000 shares of common stock from the selling stockholders. As a result, the total initial public offering size was 30,015,000 shares. For the offering, BofA Merrill Lynch, Citigroup, J.P. Morgan, Credit Suisse, Morgan Stanley and Goldman, Sachs & Co. served as joint book-running managers; Barclays Capital and Deutsche Bank Securities served as lead managers; Baird served as senior co-manager; and KeyBanc Capital Markets and SMBC Nikko served as co-managers. A registration statement relating to these securities has been filed with and declared effective on March 14, 2012 by the Securities and Exchange Commission. The offering of these securities is being made only by means of a written prospectus forming part of the effective registration statement. A copy of the final prospectus related to the offering will be filed with the Securities and Exchange Commission, which may be obtained, when available, from BofA Merrill Lynch, 4 World Financial Center, New York, NY 10080, attention: Prospectus Department, or e-mail email@example.com; Citigroup, Brooklyn Army Terminal, 140 58th Street, 8th Floor, Brooklyn, NY 11220 (Tel: 800 831-9146 or e-mail: firstname.lastname@example.org); and J.P. Morgan Securities LLC, Attention: Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, telephone: 866-803-9204. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any state or jurisdiction.