TMX Group Limited declares dividend of $0.40 per common share

        TMX Group Limited declares dividend of $0.40 per common share

PR Newswire

TORONTO, May 10, 2013

TORONTO, May 10, 2013 /PRNewswire/ - The Board of Directors of TMX Group
Limited declared a dividend of $0.40 on each common share outstanding, payable
on June 7, 2013 to shareholders of record at the close of business on May 24,
2013.

TMX Group hereby advises that this dividend is designated as an "eligible
dividend" for Canadian income tax purposes.

For the results of the quarter ended March 31, 2013 for TMX Group, please
click on the following link:
http://www.tmx.com/en/investor_relations/index.html.

About TMX Group (TSX-X) 

TMX Group's key subsidiaries operate cash and derivative markets and
clearinghouses for multiple asset classes including equities, fixed income and
energy. Toronto Stock Exchange, TSX Venture Exchange, TMX Select, Alpha Group,
The Canadian Depository for Securities, Montreal Exchange, Canadian
Derivatives Clearing Corporation, Natural Gas Exchange, BOX Options Exchange,
Shorcan, Shorcan Energy Brokers, Equicom and other TMX Group companies provide
listing markets, trading markets, clearing facilities, depository services,
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 (New York, Houston, Boston and
Chicago) as well as in London, Beijing and Sydney. For more information about
TMX Group, visit our website at www.tmx.com. Follow TMX Group on Twitter at
http://twitter.com/tmxgroup.

SOURCE TMX Group Inc.

Contact:

Shane Quinn
Manager, Communications and Public Affairs
TMX Group
416-947-4609
shane.quinn@tmx.com

Paul Malcolmson
Director, Investor Relations
TMX Group
416-947-4317
paul.malcolmson@tmx.com