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11th company to be listed on NYSE Alternext in Brussels
Brussels - 22 February 2011 – NYSE Euronext (NYX) today announced the cross-listing of STS Group, software publisher and European leader in the digital trust area, on NYSE Alternext in Brussels under the symbol ALSTS.

Founded in 2000, STS Group specializes in Digital Trust. Digital trust includes the authentication, exchange and "probative value" storage of any digital object. The group's product, STS Suite, allows private and business users to securely exchange, track, conserve and consult all of their digital material via the Internet or through the company's own network, guaranteeing the legal value of these digital documents.

STS Group was admitted to NYSE Euronext in Brussels through the listing of 6,217,884 existing shares representing the outstanding capital of the company. These shares have been listed on NYSE Alternext in Paris since 30 September 2010. Market capitalization of STS Group at yesterday’s closing was €94.7 million.

“We extend a warm welcome to STS Group on NYSE Alternext in Brussels. We are very pleased to accompany the company in this new phase in its development, fuelling growth and extending its reach to the Belgian financial community”, said Vincent Van Dessel, CEO NYSE Euronext Brussels.

“We are delighted to welcome STS Group to NYSE Alternext in Brussels,” said Ronald Kent, Group Executive Vice President of International Listing at NYSE Euronext.’ NYSE Alternext is a market well suited to innovative business seeking outstanding visibility as they pursue their growth strategies.”

Bernard Calvignac, Chairman and CEO of STS Group, added: “This dual listing is an important stage in our development as it will help to further enhance the international reach of our company and our software.”

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