News Release

TMX Group Obtains Interim Order for Plan of Arrangement Involving London Stock Exchange Group

May 25, 2011

May 25, 2011 (TORONTO) TMX Group Inc. announced today that it has obtained an interim order of the Ontario Superior Court of Justice. The interim order provides for, among other things, the holding of a special meeting of holders of common shares of TMX Group to approve the previously announced plan of arrangement under the Business Corporations Act (Ontario) regarding the proposed merger with London Stock Exchange Group plc.

The annual and special meeting of shareholders is scheduled to be held at The Design Exchange, located at 234 Bay Street, Toronto, Ontario on June 30, 2011 at 10:00 a.m. (Eastern Time).

TMX Group will mail the meeting materials, including the Notice of Annual and Special Meeting, Management Information Circular and form of proxy to shareholders of record as of May 20, 2011. The meeting materials will also be available at www.sedar.com and on TMX Group's website at www.tmx.com once they are posted on SEDAR.

Completion of the arrangement is subject to certain conditions, including the receipt of requisite approval by TMX Group's shareholders, the final approval of the Ontario Superior Court of Justice, and approvals by provincial securities regulators and by Industry Canada under the Investment Canada Act. If all necessary approvals are obtained and the conditions of the completion of the arrangement are satisfied or waived, it is expected that the arrangement will be completed in the Fall of 2011.


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, Canadian Derivatives Clearing Corporation, Natural Gas Exchange, Boston Options Exchange (BOX), Shorcan, Shorcan Energy, Equicom and other TMX Group companies provide listing markets, trading markets, clearing facilities, data products and other services to the global financial community. TMX Group is headquartered in Toronto and operates offices across Canada (Montreal, Calgary and Vancouver), in key U.S. markets (Houston, Boston and Chicago) as well as in London. For more information about TMX Group, visit our website at www.tmx.com.

For more information please contact:
Carolyn Quick
Director, Corporate Communications
TMX Group
416-947-4597
carolyn.quick@tmx.com