Exhibit 99.1 Plains All American Reports First-Quarter 2024 Results Provides Update on Permian Long-Haul Contracting & Announces Bolt-on Acquisitions Houston, TX – May 3, 2024 – Plains All American Pipeline, L.P. (Nasdaq: PAA) and Plains GP Holdings (Nasdaq: PAGP) today reported first-quarter 2024 results and reaffirmed full-year 2024 Adjusted EBITDA guidance. Plains also provided updates on Permian long-haul contracting and announced two bolt-on acquisitions. First-Quarter Results • Reported Net income att ...