William Porteous

Sits on 1 board. Last updated September 28, 2026

Time on boards

Boards served
1
Current seats
1
Board service
4 years
Director since
2023

4 years of board service in total across 1 board, counting each seat separately. Longest: Spire Global Inc., 3 years.

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
Jul 1, 2026 Spire Global Inc. Grant or award +1,516 $18.38 $27,864
May 28, 2026 Spire Global Inc. Grant or award +7,261 โ€” โ€”
Apr 1, 2026 Spire Global Inc. Grant or award +1,896 $13.38 $25,368
Jan 2, 2026 Spire Global Inc. Grant or award +3,249 $7.81 $25,375
Oct 1, 2025 Spire Global Inc. Grant or award +2,136 $11.29 $24,115
Jul 1, 2025 Spire Global Inc. Grant or award +2,065 $11.30 $23,335
Jun 5, 2025 Spire Global Inc. Grant or award +15,909 โ€” โ€”
Apr 1, 2025 Spire Global Inc. Grant or award +2,880 $7.94 $22,867
Jan 2, 2025 Spire Global Inc. Grant or award +1,578 $14.49 $22,865
Oct 1, 2024 Spire Global Inc. Grant or award +2,289 $9.99 $22,867
Jul 1, 2024 Spire Global Inc. Grant or award +2,216 $10.32 $22,869
Jun 5, 2024 Spire Global Inc. Grant or award +17,207 โ€” โ€”
Apr 1, 2024 Spire Global Inc. Grant or award +1,971 $11.60 $22,864
Jan 2, 2024 Spire Global Inc. Grant or award +2,955 $7.74 $22,872
Oct 2, 2023 Spire Global Inc. Grant or award +4,877 $4.69 $22,873

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