GT Solar International, Inc. Prices Initial Public Offering

GT Solar International, Inc. Prices Initial Public Offering

NEW YORK--July 24 2008 --GT Solar International, Inc. (NASDAQ: SOLR) today announced that the initial public offering of 30.3 million shares of its common stock has been priced at $16.50 per share. All of the shares are being sold by one selling stockholder, GT Solar Holdings, LLC. The selling stockholder has also granted the underwriters an option to purchase up to an additional 4,545,000 shares of common stock to cover over-allotments, if any. Credit Suisse Securities (USA) LLC and UBS Investment Bank acted as joint book-running managers for the offering, and Banc of America Securities LLC, Deutsche Bank Securities, Piper Jaffray and Thomas Weisel Partners LLC acted as co-managers.

A copy of the prospectus relating to the offering may be obtained by contacting: Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, New York, 10010-3629 (800-221-1037) or UBS Securities LLC, 299 Park Avenue, New York, New York, 10171, Attn: Prospectus Department (888-827-7275, ext. 3884).

A registration statement relating to the offering was filed with and declared effective on July 23, 2008 by the Securities and Exchange Commission. This press release shall not constitute an offer to sell or 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 such state or jurisdiction.

About GT Solar International, Inc.

GT Solar International, Inc. is a leading global provider of specialized manufacturing equipment and services essential for the production of photovoltaic wafers, cells and modules and polysilicon. The company’s principal products are directional solidification systems and chemical vapor deposition reactors and related equipment.