6 institutions reported holding $114.8M of PLAINS ALL AMERN PIPELINE L (PAAPU) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($66.9M), IMC-Chicago, LLC ($25.2M), SIMPLEX TRADING, LLC ($20.4M), CenterStar Asset Management, LLC ($2.4M), SUMMIT SECURITIES GROUP LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $66.9M | 3.0M | Trimmed |
| 2 | IMC-Chicago, LLC | $25.2M | 1.1M | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $20.4M | 913,600 | Added |
| 4 | CenterStar Asset Management, LLC | $2.4M | 105,900 | New |
| 5 | SUMMIT SECURITIES GROUP LLC | $0 | 0 | Exited |
| 6 | JPMORGAN CHASE & CO | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31