American Stock Exchange Lists Common Stock of TGC Industries, Inc. NEW YORK, April 18 /PRNewswire-FirstCall/ -- The American Stock Exchange(R) (Amex(R)) today listed common shares of TGC Industries, Inc., under the symbol TGE. Located in Plano, Texas, the company is an oil and gas exploration and production company. "We are delighted to welcome TGC Industries to the American Stock Exchange," said John McGonegal, senior vice president of the Amex Equities Group. "We look forward to working with TGC Industries and providing them with the value-added resources a growing company needs to succeed in today's market." "In addition to increasing our visibility with the financial community, our industry, and among our current and potential customers, we hope the Amex listing will increase liquidity in our shares as we strive to execute on our growth strategy," said Wayne Whitener, president and chief executive officer. The specialist is HBH Specialists LLC. For more information on TGC Industries, or any Amex-listed company, 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 155 ETFs to date. 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: American Stock Exchange CONTACT: J.R. Brandstrader of American Stock Exchange, +1-212-306-1440, or Web site: http://www.amex.com/

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