Plains Gp Holdings's three largest insider shareholders as of September 29, 2026 are Greg L Armstrong (Chairman Of The Board Ceo, 1.77Mn shares), John T Raymond (Director, 322.79K shares), Willie Cw Chiang (Chairman Ceo, 318.70K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Greg L Armstrong | Chairman Of The Board Ceo | 1,765,812 | 0 | 1,765,812 | 57.7% | 12 Aug, 2025 |
| 2 | John T Raymond | Director | 322,794 | 0 | 322,794 | 10.5% | 17 Aug, 2026 |
| 3 | Willie Cw Chiang | Chairman Ceo | 318,704 | 0 | 318,704 | 10.4% | 29 Sep, 2023 |
| 4 | Kevin S Mccarthy | Director | 156,091 | 0 | 156,091 | 5.1% | 17 Aug, 2026 |
| 5 | Alexandra Pruner | Director | 109,678 | 0 | 109,678 | 3.6% | 17 Aug, 2026 |
| 6 | Lawrence Michael Ziemba | Director | 95,180 | 0 | 95,180 | 3.1% | 17 Aug, 2026 |
| 7 | Bobby S Shackouls | Director | 80,801 | 0 | 80,801 | 2.6% | 17 Aug, 2026 |
| 8 | Gary R Petersen | Director | 75,544 | 0 | 75,544 | 2.5% | 17 Aug, 2026 |
| 9 | Victor Burk | Director | 50,323 | 0 | 50,323 | 1.6% | 17 Aug, 2026 |
| 10 | Ellen Desanctis | Director | 44,500 | 0 | 44,500 | 1.5% | 17 Aug, 2026 |
| 11 | Chris Temple | Director | 40,249 | 0 | 40,249 | 1.3% | 16 Aug, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 14 Aug, 2026 | Kevin S Mccarthy | Director | Acquired M | 7,400 | $0.00 | $0 | 156,091 | Direct |
| 14 Aug, 2026 | Gary R Petersen | Director | Acquired M | 7,400 | $0.00 | $0 | 75,544 | Direct |
| 14 Aug, 2026 | John T Raymond | Director | Acquired M | 7,400 | $0.00 | $0 | 322,794 | Direct |
| 14 Aug, 2026 | Victor Burk | Director | Acquired M | 7,400 | $0.00 | $0 | 50,323 | Direct |
| 14 Aug, 2026 | Lawrence Michael Ziemba | Director | Acquired M | 7,400 | $0.00 | $0 | 95,180 | Direct |
| 14 Aug, 2026 | Alexandra Pruner | Director | Acquired M | 7,400 | $0.00 | $0 | 88,294 | Direct |
| 14 Aug, 2026 | Bobby S Shackouls | Director | Acquired M | 7,400 | $0.00 | $0 | 80,801 | Direct |
| 14 Aug, 2026 | Ellen Desanctis | Director | Acquired M | 7,400 | $0.00 | $0 | 44,500 | Direct |
| 13 Aug, 2026 | Cindy B Taylor | Director | Acquired A | 7,700 | $0.00 | $0 | 7,700 | Direct |
| 14 Aug, 2026 | Ellen Desanctis | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | John T Raymond | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Gary R Petersen | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Kevin S Mccarthy | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Lawrence Michael Ziemba | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Victor Burk | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Bobby S Shackouls | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Alexandra Pruner | Director | Disposed M | 7,400 | $0.00 | $0 | 0 | Direct |
| 13 Aug, 2026 | Kevin S Mccarthy | Director | Acquired A | 6,150 | $0.00 | $0 | 6,150 | Direct |
| 13 Aug, 2026 | Lawrence Michael Ziemba | Director | Acquired A | 6,150 | $0.00 | $0 | 6,150 | Direct |
| 13 Aug, 2026 | Victor Burk | Director | Acquired A | 6,150 | $0.00 | $0 | 6,150 | Direct |