GPMT's three largest insider shareholders as of September 05, 2026 are Lazar Nikolic (Director, 655.79K shares), John A Taylor (President And Ceo, 651.74K shares), Stephen Alpart (Chief Investment Officer, 324.38K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | John A Taylor | President And Ceo | 651,736 | 0 | 651,736 | 25.2% | 16 Mar, 2026 |
| 2 | Stephen Alpart | Chief Investment Officer | 324,375 | 0 | 324,375 | 12.5% | 16 Mar, 2026 |
| 3 | Steven Plust | Chief Operating Officer | 279,280 | 0 | 279,280 | 10.8% | 17 Mar, 2025 |
| 4 | Stephen G Kasnet | Director | 178,723 | 0 | 178,723 | 6.9% | 09 Jun, 2026 |
| 5 | Hope B Woodhouse | Director | 138,222 | 0 | 138,222 | 5.3% | 09 Jun, 2026 |
| 6 | Patrick Gregory Halter | Director | 135,209 | 0 | 135,209 | 5.2% | 09 Jun, 2026 |
| 7 | William Reid Sanders | Director | 134,067 | 0 | 134,067 | 5.2% | 04 Jun, 2024 |
| 8 | Peter M. Morral | Chief Development Officer | 131,423 | 0 | 131,423 | 5.1% | 16 Mar, 2026 |
| 9 | Michael J. Karber | General Counsel And Secretary | 123,371 | 0 | 123,371 | 4.8% | 16 Mar, 2026 |
| 10 | Lazar Nikolic | Director | 98,148 | 16,929 | 115,077 | 4.4% | 09 Jun, 2026 |
| 11 | Tanuja M Dehne | Director | 109,632 | 0 | 109,632 | 4.2% | 09 Jun, 2026 |
| 12 | Marcin Urbaszek | Chief Financial Officer | 109,364 | 0 | 109,364 | 4.2% | 15 Mar, 2024 |
| 13 | Sheila K. Mcgrath | Director | 107,416 | 0 | 107,416 | 4.2% | 09 Jun, 2026 |
| 14 | Ethan Lebowitz | Chief Operating Officer | 31,298 | 0 | 31,298 | 1.2% | 16 Mar, 2026 |
| 15 | Blake Johnson | Chief Financial Officer | 17,868 | 0 | 17,868 | 0.7% | 02 Mar, 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 |
|---|---|---|---|---|---|---|---|---|
| 05 Jun, 2026 | Patrick Gregory Halter | Director | Acquired M | 40,846 | — | — | 135,209 | Direct |
| 05 Jun, 2026 | Stephen G Kasnet | Director | Acquired M | 66,929 | — | — | 205,495 | Direct |
| 05 Jun, 2026 | Hope B Woodhouse | Director | Acquired M | 43,799 | — | — | 138,222 | Direct |
| 05 Jun, 2026 | Lazar Nikolic | Director | Acquired M | 40,846 | — | — | 93,648 | Direct |
| 05 Jun, 2026 | Tanuja M Dehne | Director | Acquired M | 43,307 | — | — | 120,459 | Direct |
| 05 Jun, 2026 | Sheila K. Mcgrath | Director | Acquired M | 42,814 | — | — | 107,416 | Direct |
| 08 Jun, 2026 | Stephen G Kasnet | Director | Disposed S | 26,772 | $1.48 | $39.62K | 178,723 | Direct |
| 05 Jun, 2026 | Patrick Gregory Halter | Director | Disposed M | 40,846 | $0.00 | $0 | 0 | Direct |
| 08 Jun, 2026 | Tanuja M Dehne | Director | Disposed S | 10,827 | $1.48 | $16.02K | 109,632 | Direct |
| 05 Jun, 2026 | Sheila K. Mcgrath | Director | Disposed M | 42,814 | $0.00 | $0 | 0 | Direct |
| 05 Jun, 2026 | Hope B Woodhouse | Director | Disposed M | 43,799 | $0.00 | $0 | 0 | Direct |
| 05 Jun, 2026 | Tanuja M Dehne | Director | Disposed M | 43,307 | $0.00 | $0 | 0 | Direct |
| 05 Jun, 2026 | Stephen G Kasnet | Director | Disposed M | 66,929 | $0.00 | $0 | 0 | Direct |
| 05 Jun, 2026 | Lazar Nikolic | Director | Disposed M | 40,846 | $0.00 | $0 | 0 | Direct |
| 04 Jun, 2026 | Tanuja M Dehne | Director | Acquired A | 38,961 | $0.00 | $0 | 38,961 | Direct |
| 04 Jun, 2026 | Hope B Woodhouse | Director | Acquired A | 39,772 | $0.00 | $0 | 39,772 | Direct |
| 04 Jun, 2026 | Lazar Nikolic | Director | Acquired A | 34,902 | $0.00 | $0 | 34,902 | Direct |
| 04 Jun, 2026 | Stephen G Kasnet | Director | Acquired A | 58,441 | $0.00 | $0 | 58,441 | Direct |
| 04 Jun, 2026 | Patrick Gregory Halter | Director | Acquired A | 34,902 | $0.00 | $0 | 34,902 | Direct |
| 04 Jun, 2026 | Sheila K. Mcgrath | Director | Acquired A | 38,149 | $0.00 | $0 | 38,149 | Direct |