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NYSE Euronext, Inc. (formerly NYSE Group, Inc. and Euronext N.V.) (NYSE: NYX) is a Euro-American for-profit corporation that operates multiple securities exchanges, most notably Euronext, New York Stock Exchange (NYSE), and NYSE Arca (formerly known as ArcaEx). NYSE Group also operates NYSE Regulation, which is a non-profit Self-Regulatory Organization that oversees securities firms and companies listed on the New York Stock Exchange and NYSE Arca. list of major NYSE Euronext locations:

Amsterdam, Netherlands - Euronext Amsterdam
Paris, France - Euronext Paris
Lisbon, Portugal - Euronext Lisbon
London, United Kingdom - Euronext.liffe
Chicago, Illinois, United States of America - NYSE Arca (formerly Archipelago)
New York City, New York, United States of America - NYSE, Headquarters
New York City, New York, United States of America - AMEX (To be relocated to NYSE headquarters)
San Francisco, California, United States of America - NYSE Arca (formerly Pacific Exchange)
Belfast, Northern Ireland - part of NYSE Euronext Technologies (formerly Wombat Financial Software)
Brussels, Belgium - Euronext Brussels