Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 7 years
- Director since
- 2023
7 years of board service in total across 2 boards, counting each seat separately. Longest: Perimeter Solutions SA, 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Perimeter Solutions SA May 28, 202690.8%
-
Perimeter Solutions SA May 29, 202597.1%
-
Perimeter Solutions SA May 23, 202489.8%
-
Perimeter Solutions SA June 22, 202397.2%
-
CNX Resources Corporation May 4, 202398.2%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| May 7, 2026 | CNX Resources Corporation | Grant or award | +8,770 | — | — |
| May 4, 2026 | CNX Resources Corporation | Option exercise | +83,097 | $13.19 | $1,096,049 |
| May 4, 2026 | CNX Resources Corporation | Open-market sale | −28,800 | $38.25 | $1,101,600 |
| Mar 11, 2026 | Perimeter Solutions SA | Open-market sale | −100,000 | $23.18 | $2,318,000 |
| Mar 10, 2026 | Perimeter Solutions SA | Open-market sale | −100,000 | $23.63 | $2,363,000 |
| Mar 9, 2026 | Perimeter Solutions SA | Open-market sale | −90,043 | $23.18 | $2,087,197 |
| Mar 9, 2026 | Perimeter Solutions SA | Open-market sale | −34,957 | $23.85 | $833,724 |
| Mar 6, 2026 | Perimeter Solutions SA | Open-market sale | −100,000 | $23.63 | $2,363,000 |
| Mar 5, 2026 | Perimeter Solutions SA | Open-market sale | −100,000 | $24.06 | $2,406,000 |
| Mar 4, 2026 | Perimeter Solutions SA | Open-market sale | −125,000 | $24.26 | $3,032,500 |
| Mar 3, 2026 | Perimeter Solutions SA | Grant or award | +5,582,492 | — | — |
| Dec 9, 2025 | Perimeter Solutions SA | Gift | −673,685 | — | — |
| Jun 20, 2025 | Perimeter Solutions SA | Other | +746,767 | — | — |
| Nov 6, 2024 | Perimeter Solutions SA | Option exercise | +125,000 | $12.00 | $1,500,000 |
| May 2, 2024 | CNX Resources Corporation | Grant or award | +17,242 | — | — |
Questions about William N. Thorndike Jr.
What boards is William N. Thorndike Jr. on?
William N. Thorndike Jr. sits on the boards of CNX Resources Corporation and Perimeter Solutions SA.
How long has William N. Thorndike Jr. served on boards?
Our records show at least 7 years of board service across 2 boards, the earliest from 2023.
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