In This Annual Report on Form 10-K, “NYSE Euronext,” “We,” “Us,” And

In this Annual Report on Form 10-K, “NYSE Euronext,” “we,” “us,” and “our” refer to NYSE Euronext, a Delaware corporation, and its subsidiaries, except where the context requires otherwise. “AEX»,” “AlternextTM,” “ArcaBook»,” “ArcaVision»,” “Archipelago»,” ‘‘Bclear»,” “CAC 40»,” “CscreenTM,” eGovDirect.com»,” “Euronext»,” “Euronext 100 Index»,” “Intellidex»,” “NYSE BlueTM,” “NSC»,” “NYFIX»,” “NYSE»,” “NYSE Bonds»,” “NYSE Broker Volume»,” “NYSE Composite Index»,” “NYSE LiffeTM,” “NYSE MACTM,” “NYSE MAC AlertsTM,” “NYSEnet»,” “NYSE OpenBook»,” “NYX»,” “SFTI»,” “SmartPoolTM,” “UTPTM” and “Wombat»,” among others, are trademarks or service marks of NYSE Euronext or its licensees or licensors with all rights reserved. “FINRA»” and “Trade Reporting Facility»” are trademarks of the Financial Industry Regulatory Authority (“FINRA”), with all rights reserved, and are used under license from FINRA. All other trademarks and servicemarks used herein are the property of their respective owners. About NYSE Euronext NYSE Euronext, a Delaware corporation, was organized on May 22, 2006 in anticipation of the combination of the businesses of NYSE Group, Inc., a Delaware corporation, and Euronext N.V., a company organized under the laws of the Netherlands. The combination was consummated on April 4, 2007. NYSE Group, Inc. was formed in connection with the March 7, 2006 merger between New York Stock Exchange, Inc., a New York Type A not-for-profit corporation, and Archipelago Holdings, Inc., a Delaware corporation. Euronext was the first cross-border exchange group, created with the 2000 merger of the Paris, Amsterdam and Brussels stock exchanges. The New York Stock Exchange traces its origins to the Buttonwood Agreement, signed in 1792 by a group of 24 traders gathered under a buttonwood tree in lower Manhattan. In 1817, the traders formed the New York Stock & Exchange Board, which in 1863 was renamed the New York Stock Exchange. The Amsterdam Stock Exchange, Euronext’s oldest constituent and the world’s first stock exchange, originated in 1602 in conjunction with a stock issuance by the Dutch East India Company. Our principal executive office is located at 11 Wall Street, New York, New York 10005 and our telephone number is (212) 656-3000. Our European headquarters are located at 39 rue Cambon, 75039 Paris, France, and our telephone number is +33 1 49 27 10 00. Our website is www.nyx.com. We are not incorporating the information on our website into this Annual Report on Form 10-K. We are required to file annual, quarterly and current reports, proxy statements and other information with the U.S. Securities and Exchange Commission (the “SEC”). The public may read and copy any materials that we file with the SEC at the SEC’s Public Reference Room at 100 F street, N.E., Washington, D.C. 20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC at http://www.sec.gov. We also make available free of charge, on or through our website, our proxy statements, Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to those reports, as soon as reasonably practicable after they are filed with, or furnished to, the SEC. Unless otherwise specified or the context otherwise requires: •“NYSE” refers to (1) prior to the completion of the merger between the New York Stock Exchange, Inc. and Archipelago Holdings, Inc. (“Archipelago”), which occurred on March 7, 2006, New York Stock Exchange, Inc., a New York Type A not-for-profit corporation, and (2) after completion of the merger, New York Stock Exchange LLC, a New York limited liability company, and, where the context requires, its subsidiaries, NYSE Market, Inc., a Delaware corporation, and NYSE Regulation, Inc., a New York not-for-profit corporation. New York Stock Exchange LLC is registered with the SEC under the U.S. Securities Exchange Act of 1934 (the “Exchange Act”) as a national securities exchange. •“NYSE Arca” refers collectively to NYSE Arca, L.L.C., a Delaware limited liability company, NYSE Arca, Inc., a Delaware corporation, and NYSE Arca Equities, Inc., a Delaware corporation. NYSE Arca, Inc. is registered with the SEC under the Exchange Act as a national securities exchange. •“NYSE Amex” refers to NYSE Amex LLC, a Delaware limited liability company (formerly known as the American Stock Exchange LLC). NYSE Amex LLC is registered with the SEC under the Exchange Act as a national securities exchange. ii.

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