Columbia Pipeline Group, Inc. (NYSE: CPGX) ("CPG") today announced that CPG's stockholders approved the proposals identified in the definitive proxy statement, datedMay 17, 2016, at a special meeting of stockholders held earlier today relating to the proposed acquisition of CPG by TransCanada Corporation (TSX: TRP) (NYSE: TRP) ("TransCanada"). Holders of 95.33 percent of CPG shares present and voting at the meeting voted in favor of the proposal to adopt the agreement and plan of merger with TransCanada, dated March 17, 2016, with 77.48 percent of CPG's outstanding shares present and voting at the meeting.

As announced on March 17, 2016, CPG and TransCanada entered into a definitive merger agreement pursuant to which TransCanada will acquire CPG for $25.50 per share in cash. CPG's stockholder approval is a condition to the closing of the merger. The completion of the transaction remains subject to certain other customary closing conditions, but CPG and TransCanada anticipate that the closing of the transaction will be effective on July 1, 2016.

About Columbia Pipeline Group, Inc.

Columbia Pipeline Group, Inc. operates approximately 15,000 miles of strategically located interstate pipeline, gathering and processing assets extending from New York to the Gulf of Mexico, including an extensive footprint in the Marcellus and Utica shale production areas. CPG also operates one of the nation's largest underground natural gas storage systems. CPG is listed on the NYSE under the ticker symbol CPGX.