Calgary, Alberta--(Newsfile Corp. - September 21, 2022) - TransGlobe Energy Corporation (AIM: TGL) (TSX: TGL) ( NASDAQ: TGA ) ("TransGlobe" or the "Company") is pleased to note the updated report issued by a leading proxy advisor, Institutional Shareholder Services ("ISS"), recommends its institutional clients vote FOR the proposed business combination ("Proposed Transaction") of TransGlobe and VAALCO Energy, Inc. ( NYSE: EGY ) (LSE: EGY) ("VAALCO") to create a world-class African-focused E&P company supporting sustainable shareholder returns and growth.