Perimeter Solutions's top three insider shareholders as of March 23, 2026 are Partnership Master Fund, Lp Windacre (TenPercentOwner, 21.85Mn shares), William N Jr Thorndike (Director, 8.54Mn shares), Haitham Khouri (Chief Executive Officer, 2.10Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Partnership Master Fund, Lp Windacre | 21,854,600 | 0 | 01 Jul, 2025 | |
| William N Jr Thorndike | 8,535,656 | 0 | 11 Mar, 2026 | |
| W Nicholas Howley | 5,086,840 | 0 | 05 Mar, 2026 | |
| Haitham Khouri | Chief Executive Officer | 2,104,150 | 0 | 05 Mar, 2026 |
| Haitham Khouri | Chief Executive Officer | 0 | 1,225,385 | 05 Aug, 2024 |
| Vivek Raj | 677,560 | 0 | 05 Mar, 2026 | |
| Shannon Horn | Business Director | 445,695 | 0 | 10 Nov, 2021 |
| Tracy Britt Cool | 250,493 | 0 | 05 Mar, 2026 | |
| Edward D. Goldberg | Chief Executive Officer | 222,957 | 0 | 10 Nov, 2021 |
| Barry Lederman | Chief Financial Officer | 196,416 | 0 | 10 Nov, 2021 |
| Kevin M Stein | 0 | 115,000 | 10 Nov, 2021 | |
| Sean P Hennessy | 100,000 | 0 | 10 Nov, 2021 | |
| Noriko Yokozuka | General Counsel | 47,157 | 0 | 16 Dec, 2025 |
| Stephen Cornwall | Chief Commercial Officer | 42,087 | 0 | 23 Nov, 2021 |
| Jorge Valladares | 0 | 14,000 | 13 Jun, 2024 | |
| Tracy Britt Cool | 0 | 6,200 | 16 May, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 09 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 90,043 | $23.18 | 8,770,613 | D | S |
| 09 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 34,957 | $23.85 | 8,735,656 | D | S |
| 10 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 100,000 | $23.63 | 8,635,656 | D | S |
| 11 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 100,000 | $23.18 | 8,535,656 | D | S |
| 04 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 125,000 | $24.26 | 9,060,656 | D | S |
| 05 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 100,000 | $24.06 | 8,960,656 | D | S |
| 06 Mar, 2026 | William N Jr Thorndike | Common Stock | D | 100,000 | $23.63 | 8,860,656 | D | S |
| 03 Mar, 2026 | Tracy Britt Cool | Common Stock | A | 65,843 | $0.00 | 250,493 | D | A |
| 03 Mar, 2026 | Haitham Khouri | Common Stock | A | 1,600,317 | $0.00 | 2,104,150 | D | A |
| 03 Mar, 2026 | Vivek Raj | Common Stock | A | 555,859 | $0.00 | 677,560 | D | A |
| 03 Mar, 2026 | W Nicholas Howley | Common Stock | A | 5,582,492 | $0.00 | 6,188,692 | D | A |
| 03 Mar, 2026 | William N Jr Thorndike | Common Stock | A | 5,582,492 | $0.00 | 9,185,656 | D | A |
| 03 Mar, 2026 | W Nicholas Howley | Common Stock | D | 1,101,852 | $0.00 | 5,086,840 | D | G |
| 26 Feb, 2026 | Tracy Britt Cool | Stock Option (right to buy) | A | 6,194 | $0.00 | 6,194 | D | A |
| 26 Feb, 2026 | Kyle Sable | Stock Option (right to buy) | A | 50,000 | $0.00 | 100,000 | D | A |
| 26 Feb, 2026 | Haitham Khouri | Stock Option (right to buy) | A | 88,489 | $0.00 | 88,489 | D | A |
| 26 Feb, 2026 | Grant Bowman | Stock Option (right to buy) | A | 100,000 | $0.00 | 200,000 | D | A |
| 26 Feb, 2026 | Noriko Yokozuka | Stock Option (right to buy) | A | 120,000 | $0.00 | 360,000 | D | A |
| 26 Feb, 2026 | Vivek Raj | Stock Option (right to buy) | A | 6,194 | $0.00 | 6,194 | D | A |
| 26 Feb, 2026 | Iii Jorge L. Valladares | Stock Option (right to buy) | A | 6,194 | $0.00 | 6,194 | D | A |