Exhibit 99.1 Plains All American Reports Second-Quarter 2025 Results Houston, TX – August 8, 2025 – Plains All American Pipeline, L.P. (Nasdaq: PAA) and Plains GP Holdings (Nasdaq: PAGP) today reported solid second-quarter 2025 results and provided the following highlights: Second-Quarter Results Highlights and Recent Announcements "We continue to advance our strategic initiatives and delivered solid second-quarter performance in a volatile macro environment," said Willie Chiang, Chairman, CEO and President ...