CALGARY, ALBERTA--(Marketwired - May 19, 2015) - GRANITE OIL CORP. ("Granite", formerly DeeThree Exploration Ltd.) (TSX:GXO) announces that effective at the opening of trading on Thursday, May 21, 2015, the common shares of Granite will be listed and posted for trading on the Toronto Stock Exchange under the stock symbol of "GXO" in substitution for the common shares of DeeThree Exploration Ltd. (TSX:DTX) which will be delisted at that time.

The foregoing results from a recently completed plan of arrangement (the "Arrangement") involving Granite and Boulder Energy Ltd. ("Boulder") (TSX:BXO). For additional information and further discussion regarding the Arrangement, Granite and Boulder, please see the information circular of DeeThree Exploration Ltd. dated effective April 9, 2015, a copy of which is available for review on Granite's SEDAR profile at www.sedar.com.

Contact Information:

Granite Oil Corp.
Michael Kabanuk
Chief Executive Officer and President
(403) 984-6335

Granite Oil Corp.
Jonathan Fleming
Executive Vice President
(403) 984-6328