 CALGARY, AB, July 13, 2021 PRNewswire - TransAlta Corporation TransAlta TSX: TA NYSE: TAC will release its second quarter 2021 results before markets open on Tuesday, August 10, 2021. A conference call and webcast to discuss the results will be held for investors, analysts, members of the media and other interested parties the same day beginning at 9:00 a.m. 