| | | | | | | | |
| Subsidiary | | Jurisdiction of Organization |
| Aurora Pipeline Company Ltd. | | Canada |
| Bakersfield Crude Terminal LLC | | Delaware |
| Cactus II Pipeline LLC | | Delaware |
| Capline Pipeline Company LLC | | Delaware |
| Eagle Ford Crude Terminal LLC | | Delaware |
| FM Midstream Holdings LLC | | Delaware |
| Niobrara Crude Terminal LLC | | Delaware |
| PAA Finance Corp. | | Delaware |
| PAA Luxembourg S.a.r.l. | | Luxembourg |
| PAA Midstream LLC | | Delaware |
| PAA Natural Gas Canada ULC | | Alberta |
| PAA Natural Gas Storage, LLC | | Delaware |
| PAA Natural Gas Storage, L.P. | | Delaware |
| PAA Service Corp. | | Texas |
| PAA/Vulcan Gas Storage, LLC | | Delaware |
| Pacific Pipeline System LLC | | Delaware |
| Pine Prairie Energy Center, LLC | | Delaware |
| Plains All American Emergency Relief Fund, Inc. | | Texas |
| Plains Capline LLC | | Delaware |
| Plains Gas Solutions, LLC | | Texas |
| Plains GP LLC | | Texas |
| Plains LPG Services GP LLC | | Delaware |
| Plains LPG Services, L.P. | | Texas |
| Plains Marketing Bondholder, LLC | | Delaware |
| Plains Marketing Canada LLC | | Delaware |
| Plains Marketing, L.P. | | Texas |
| Plains Midstream Canada ULC | | British Columbia |
| Plains Midstream Holdings Canada ULC | | British Columbia |
| Plains Midstream Luxembourg S.a.r.l. | | Luxembourg |
| Plains Midstream Superior LLC | | Texas |
| Plains Pipeline, L.P. | | Texas |
| Plains Pipeline Montana LLC | | Delaware |
| Plains Products Terminals LLC | | Delaware |
| Plains Rail Holdings LLC | | Delaware |
| Plains South Texas Gathering LLC | | Texas |
| PMC (Nova Scotia) Company | | Nova Scotia |
| PNGS GP LLC | | Delaware |
| PPEC Bondholder, LLC | | Delaware |
| Rancho LPG Holdings LLC | | Delaware |
| Red River Pipeline Company LLC | | Delaware |
| Rocky Mountain Pipeline Montana LLC | | Delaware |
| SG Resources Mississippi, L.L.C. | | Delaware |