American Stock Exchange Lists Common Stock of Gasco Energy, Inc. NEW YORK, Dec. 6 /PRNewswire/ -- The American Stock Exchange(R) (Amex(R)) today listed the common stock of Gasco Energy, Inc. under the ticker symbol GSX. Denver-based Gasco Energy, Inc. is a rapidly growing independent oil and gas company focused on building shareholder value through the development of large natural gas deposits in the U.S. Rocky Mountains. "We welcome Gasco Energy to the growing number of energy companies listed on the American Stock Exchange," said John McGonegal, senior vice president of the Amex Equities Group. "The Amex looks forward to supporting Gasco in its effort to build increased investor awareness and visibility within the investment community." "We are very pleased with our listing on the American Stock Exchange," Mark A. Erickson Chief Executive Officer and President, said. "The Amex provides us a broader exposure to the investment community, which should benefit us and our shareholders as Gasco continues to exploit its leasehold in Utah's Uinta Basin." The specialist in Gasco Energy will be AIM Securities. For further information on GSX and other Amex-listed companies, please visit http://www.amex.com/. The American Stock Exchange(R) (Amex(R)) is the only primary exchange that offers trading across a full range of equities, options and exchange traded funds (ETFs), including structured products and HOLDRS(SM). In addition to its role as a national equities market, the Amex is the pioneer of the ETF, responsible for bringing the first domestic product to market in 1993. Leading the industry in ETF listings, the Amex lists 142 ETFs. The Amex is also one of the largest options exchanges in the U.S., trading options on broad-based and sector indexes as well as domestic and foreign stocks. For more information, please visit http://www.amex.com/. DATASOURCE: The American Stock Exchange CONTACT: Dan Charnas of the American Stock Exchange, +1-212-306-1654, or Web site: http://www.amex.com/

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