William N. Thorndike Jr.

Sits on 2 boards. Last updated September 28, 2026

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.

3 years ยท Since 2023
3 years ยท Since 2023

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 โ€” โ€”
May 4, 2026 CNX Resources Corporation Option exercise +83,097 $13.19 $1,096,049
May 4, 2026 CNX Resources Corporation Open-market sale โˆ’28,800 $38.25 $1,101,600
Mar 11, 2026 Perimeter Solutions SA Open-market sale โˆ’100,000 $23.18 $2,318,000
Mar 10, 2026 Perimeter Solutions SA Open-market sale โˆ’100,000 $23.63 $2,363,000
Mar 9, 2026 Perimeter Solutions SA Open-market sale โˆ’90,043 $23.18 $2,087,197
Mar 9, 2026 Perimeter Solutions SA Open-market sale โˆ’34,957 $23.85 $833,724
Mar 6, 2026 Perimeter Solutions SA Open-market sale โˆ’100,000 $23.63 $2,363,000
Mar 5, 2026 Perimeter Solutions SA Open-market sale โˆ’100,000 $24.06 $2,406,000
Mar 4, 2026 Perimeter Solutions SA Open-market sale โˆ’125,000 $24.26 $3,032,500
Mar 3, 2026 Perimeter Solutions SA Grant or award +5,582,492 โ€” โ€”
Dec 9, 2025 Perimeter Solutions SA Gift โˆ’673,685 โ€” โ€”
Jun 20, 2025 Perimeter Solutions SA Other +746,767 โ€” โ€”
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 โ€” โ€”

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