American Stock Exchange Lists Common Shares of Dyadic International, Inc. NEW YORK, May 26 /PRNewswire/ -- The American Stock Exchange(R) (Amex(R)) today listed common shares of Dyadic International, Inc., under the ticker symbol DIL. Dyadic International, Inc., is engaged in the development, manufacture and sale of biological products (proteins, enzymes, peptides and other bio- molecules), as well as the licensing of its enabling proprietary technology to business collaborators for the discovery, development and manufacture of biological products from genes. Dyadic markets its products and services for applications in the textile, chemical, agricultural, pulp & paper, pharmaceutical, biotechnology and other industries, using its proprietary C1 Host Technology and C1 Expression and Screening Systems for the discovery, development and production of biological products. "We are very pleased to welcome Dyadic International, Inc., to the American Stock Exchange," said John McGonegal, senior vice president of the Amex Equities Group. "In listing at the Amex, we will be able to offer Dyadic International the value-added services that a growing company needs to succeed in today's competitive market." "This is an important day in Dyadic's history," said Mark Emalfarb, Dyadic's Chief Executive Officer. "We are pleased to join one of the most significant stock exchanges in the world and look forward to expanding our reach into the investment community as we continue to grow Dyadic as a company." The specialist in Dyadic International, Inc., will be Weiskopf, Silver & Co. For more information on DIL 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 156 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: The American Stock Exchange CONTACT: Mary Chung of the American Stock Exchange, +1-212-306-1641, Web site: http://www.amex.com/

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