 TSX: GPR NYSE American: GPL This news release constitutes a designated news release for the purposes of Great Panthers prospectus supplement dated July 9, 2019, to its short form base shelf prospectus dated July 2, 2019 VANCOUVER, BC, June 2, 2021 PRNewswire - Great Panther Mining Limited TSX: GPR NYSE-A: GPL Great Panther or the Company, a growing gold and silver producer focused on the Americas, is pleased to announce the appointment of Sandra Daycock as Chief Financial Officer CFO and Fernando Cornejo as Chief Operating Officer COO. Neil Hepworth will be retiring as COO, effective June 30, 2021. 