 CALGARY, AB, May 25, 2021 PRNewswire - TransAlta Corporation TransAlta or the Company TSX: TA NYSE: TAC today announced that the Toronto Stock Exchange TSX has accepted the notice filed by the Company to implement a normal course issuer bid NCIB for a portion of its common shares Common Shares. Pursuant to the NCIB, TransAlta may repurchase up to a maximum of 14,000,000 Common Shares, representing approximately 7.16 of its public float of Common Shares as at May 18, 2021. 