VANCOUVER, Feb. 21, 2012 /PRNewswire/ - Westport Innovations Inc. (TSX: WPT) (NASDAQ: WPRT), announced today that it is offering to sell, subject to market and other conditions, 5,000,000 of its common shares in the United States and Canada pursuant to a preliminary prospectus supplement to its base shelf prospectus originally dated January 3, 2012. Copies of the U.S. preliminary prospectus supplement can be accessed through the SEC's website at www.sec.gov, and copies of the Canadian preliminary prospectus supplement are available at www.sedar.com. Morgan Stanley & Co. LLC and Jefferies & Company, Inc. are the joint bookrunners for the offering. The common shares issued under the offering will be listed on The NASDAQ Global Market. Westport has applied to list the common shares issued under the offering on the Toronto Stock Exchange, which listing will be subject to fulfillment of all of the listing requirements of the exchange. The offering will be made only by means of Westport's preliminary prospectus supplement and accompanying short form base shelf prospectus. Copies of the United States preliminary prospectus supplement, when available, may be obtained from: Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014, or by telephone at (866) 718-1649 (toll free), or by e-mail at email@example.com; or Jefferies & Company, Inc., Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 12th Floor, New York, NY, 10022, or by telephone at 877-547-6340 (toll free), or by email at Prospectus_Department@Jefferies.com. Copies of the Canadian preliminary prospectus supplement, when available, may be obtained by contacting Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014, or by telephone at (866) 718-1649 (toll free), or by e-mail at firstname.lastname@example.org. 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 the common shares of Westport in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.