TMX Group Inc. today reported a 26% jump in its second-quarter profit, due in part to contributions from its May 1 acquisition of the Montreal Exchange.

The exchange operator said net income was $49.2 million, or 65¢ a share, in the three months ended June 30. That was up from profit of $39.1 million, or 57¢ a share, in the same 2007 period.

The second quarter included two months of results from Montreal Exchange, which contributed $3.9 million of total profit during this period.

In the cash equities and fixed income business, profit rose 15% to $43.8 million.

TMX said revenue rose 22% to $130.1 million in the quarter, while operating expenses climbed 27% to $54.3 million.

“We continued to see strong growth in both the market data and energy parts of our business and our results reflect a positive revenue contribution from MX,” CFO Michael Ptasznik said in a release.

“In the second half of 2008, we look forward to beginning to realize the benefits of the integration and to providing new solutions for customers,” TMX president and CEO Thomas Kloet said.

TMX Group’s key subsidiaries include Toronto Stock Exchange, TSX Venture Exchange, Montreal Exchange, and the Natural Gas Exchange.