"Larry is an outstanding leader and business professional who brings an impressive portfolio of experience and expertise to our company," said Mr. Niederauer. "He has a complete understanding of financial markets, trading technology and operations, and our customers. This will enable him to contribute quickly and substantially to our strategic business goals, our rapidly evolving market model, our ability to serve customers, and our business growth."

"This is a very exciting and challenging time for financial markets and for NYSE Euronext," Mr. Leibowitz said. "The opportunities ahead for NYSE Euronext, our customers and all our constituents are virtually limitless, and there's an outstanding base to build upon. I look forward to being part of this dynamic organization."

Mr. Leibowitz, who most recently served as Chief Operating Officer of UBS Americas Equities, joined UBS as a Managing Director in November 2004 when the firm acquired Schwab Capital Markets. He was responsible for several areas including Market Structure, Strategic Planning, Business Analysis, Regulatory Control, and the Broker Services functions for the Equities Division. At Schwab, Leibowitz was Co-Head of Schwab Capital Markets. Before joining Schwab in October 2001, he co-founded Bunker Capital, a quantitative hedge fund in 1996. He also served as CEO of REDIBook ECN and as Managing Director and Head of Program and Quantitative Trading at Credit Suisse First Boston.

In addition to chairing the NASDAQ Quality of Market Committee and serving on the Securities Industry and Financial Markets Association's (SIFMA) Market Structure Committee, Mr. Leibowitz has been a featured speaker at numerous industry forums related to market structure issues. Mr. Leibowitz graduated from Princeton University with a degree in Economics.