Western Copper and Gold and Mitsubishi Materials Strengthen Strategic Partnership

About this update from Western Copper And Gold Corporation

Vancouver, British Columbia--(Newsfile Corp. - June 15, 2026) - Western Copper and Gold Corporation (TSX: WRN) (NYSE American: WRN) ("Western" or the "Company") is pleased to announce a further strengthening of its strategic partnership with Mitsubishi Materials Corporation ("Mitsubishi Materials").Further to its news release dated June 4, 2026, Western has entered into an amended and restated investor rights agreement with Mitsubishi Materials, most notably extending the rights and obligations thereunder until November 30, 2028, subject to Mitsubishi Materials acquiring 1.2 million common shares of the Company through open market purchases. These purchases will be non-dilutive to existing shareholders, as no new shares will be issued by the Company. Upon completion, Mitsubishi Materials' ownership in Western will return to approximately 5%."Mitsubishi Materials continues to demonstrate their long-term conviction in Western and the Casino Project," said Sandeep Singh, President & CEO. "We greatly value their involvement and feel it is mutually beneficial to extend the relationship."About Western Copper and Gold CorporationWestern Copper and Gold Corporation is advancing the Casino Project, Canada's premier copper-gold mine in the Yukon and one of the most economic greenfield copper-gold mining projects in the world. The Company is committed to working collaboratively with First Nations and local communities to progress the Casino Project, using internationally recognized responsible mining technologies and practices.For more information, visit www.westerncopperandgold.com.On behalf of the board, "Sandeep Singh"Sandeep SinghPresident and CEOWestern Copper and Gold Corporation For more information, please contact:Cameron MageeDirector, Investor Relations & Corporate DevelopmentWestern Copper and Gold Corporation437-219-5576 or [email protected] Note Regarding Forward-Looking Statements This news release includes certain "forward-looking information" and "forward-looking statements" (collectively "forward-looking statements") within the meaning of applicable Canadian and United States securities legislation including the United States Private Securities Litigation Reform Act of 1995. These forward-looking statements are made as of the date of this news release. Forward-looking statements are frequently, but not alway...

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