GLP's three largest insider shareholders as of September 29, 2026 are Eric Slifka (Vice Chairman, President Ceo, 570.41K shares), Gp Llc Global (Other, 171.58K shares), Mark Romaine (Chief Operating Officer, 169.11K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mark Romaine | Chief Operating Officer | 308,218 | 0 | 308,218 | 30.9% | 26 Mar, 2026 |
| 2 | Gp Llc Global | Other | 304,846 | 0 | 304,846 | 30.6% | 21 Sep, 2026 |
| 3 | Eric Slifka | Chairman, President Ceo | 97,751 | 0 | 97,751 | 9.8% | 27 Feb, 2026 |
| 4 | Gregory B. Hanson | Chief Financial Officer | 87,085 | 0 | 87,085 | 8.7% | 27 Feb, 2026 |
| 5 | Matthew Spencer | Chief Accounting Officer | 55,437 | 0 | 55,437 | 5.6% | 27 Feb, 2026 |
| 6 | Sean T. Geary | Chief Legal Officer Sec. | 48,333 | 0 | 48,333 | 4.8% | 06 May, 2025 |
| 7 | Robert J Mccool | Director | 45,018 | 0 | 45,018 | 4.5% | 09 Jan, 2024 |
| 8 | Jaime Pereira | Director | 13,814 | 0 | 13,814 | 1.4% | 07 Jan, 2026 |
| 9 | Robert W Owens | Director | 13,314 | 0 | 13,314 | 1.3% | 07 Jan, 2026 |
| 10 | John T Hailer | Director | 13,314 | 0 | 13,314 | 1.3% | 07 Jan, 2026 |
| 11 | Clare Mcgrory Kelly | Director | 8,813 | 0 | 8,813 | 0.9% | 07 Jan, 2026 |
| 12 | Kristin K. Seabrook | Chief Legal Officer Secy. | 1,753 | 0 | 1,753 | 0.2% | 15 Apr, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 17 Sep, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $51.08 | $255.40K | 166,584 | Direct |
| 21 Sep, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $49.63 | $248.15K | 171,584 | Direct |
| 17 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $43.28 | $216.40K | 141,584 | Direct |
| 18 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $42.81 | $214.05K | 146,584 | Direct |
| 12 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $46.50 | $232.50K | 131,584 | Direct |
| 15 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $46.69 | $233.45K | 136,584 | Direct |
| 09 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $49.44 | $247.20K | 121,584 | Direct |
| 10 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $50.17 | $250.85K | 126,584 | Direct |
| 04 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $49.50 | $247.50K | 111,584 | Direct |
| 08 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $49.29 | $246.45K | 116,584 | Direct |
| 01 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $48.41 | $242.05K | 96,584 | Direct |
| 02 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $49.19 | $245.95K | 101,584 | Direct |
| 03 Jun, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $49.42 | $247.10K | 106,584 | Direct |
| 27 May, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $48.94 | $244.70K | 81,584 | Direct |
| 28 May, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $48.35 | $241.75K | 86,584 | Direct |
| 29 May, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $47.22 | $236.10K | 91,584 | Direct |
| 21 May, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $51.28 | $256.40K | 67,400 | Direct |
| 22 May, 2026 | Gp Llc Global | Other | Acquired P | 4,184 | $50.05 | $209.41K | 71,584 | Direct |
| 26 May, 2026 | Gp Llc Global | Other | Acquired P | 5,000 | $48.92 | $244.60K | 76,584 | Direct |
| 18 May, 2026 | Gp Llc Global | Other | Acquired P | 7,500 | $48.86 | $366.45K | 44,900 | Direct |