News Release

TMX Group Inc. to Discuss merger with London Stock Exchange Group plc

February 9, 2011

February 9, 2011 (TORONTO) - TMX Group Inc. will hold a press conference at TMX headquarters in Toronto at 10:00 EST on February 9, 2011.

WHAT: London Stock Exchange Group and TMX Group Join Forces in Merger of Equals

WHERE: TMX Broadcast Centre
Exchange Tower
130 King Street W.
Toronto, ON

WHO: Xavier Rolet, CEO of LSEG
Thomas Kloet, CEO of TMX
Chris Gibson-Smith, Chairman of LSEG
Wayne Fox, Chairman of TMX

WHEN: Wednesday, February 9, 2011, 10 a.m. (EST)

HOW: You will be able to participate in this call using the following details:

Conference name: TMX / London Stock Exchange
Conference ID # 43256526

+1 888 241 0394 North America Toll-Free
+1 647 427 3413 International Dial-in
+44 0800 051 7107 UK Freephone

A webcast of the press conference will be available at

http://www.snwebcastcenter.com/custom_events/tmx-20110209/site/index.php

About TMX Group (TSX-X)

TMX Group's key subsidiaries operate cash and derivative markets for multiple asset classes including equities, fixed income and energy. Toronto Stock Exchange, TSX Venture Exchange, Montreal Exchange, Natural Gas Exchange, Boston Options Exchange (BOX), Shorcan, Equicom and other TMX Group companies provide trading markets, clearing facilities, data products and other services to the global financial community. TMX Group is headquartered in Toronto with offices in Montreal, Calgary and Vancouver. For more information about TMX Group, visit our website at www.tmx.com.

For more information please contact:

Carolyn Quick
Director, Corporate Communications
416-947-4597
carolyn.quick@tmx.com