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: Black Stone Minerals L.P., 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Black Stone Minerals L.P. June 11, 202684.1%
-
Black Stone Minerals L.P. June 12, 202592.7%
-
Black Stone Minerals L.P. June 13, 202497.8%
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Black Stone Minerals L.P. June 15, 202399.0%
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 |
|---|---|---|---|---|---|
| Oct 2, 2026 | Black Stone Minerals L.P. | Grant or award | +1,309 | $14.32 | $18,745 |
| Jul 2, 2026 | Black Stone Minerals L.P. | Grant or award | +1,342 | $13.97 | $18,748 |
| Jun 1, 2026 | Black Stone Minerals L.P. | Open-market purchase | +36,363 | $13.62 | $495,264 |
| May 29, 2026 | Black Stone Minerals L.P. | Open-market purchase | +36,363 | $13.48 | $490,173 |
| May 28, 2026 | Black Stone Minerals L.P. | Open-market purchase | +37,650 | $13.21 | $497,357 |
| Apr 2, 2026 | Black Stone Minerals L.P. | Grant or award | +1,240 | $15.12 | $18,749 |
| Jan 13, 2026 | Black Stone Minerals L.P. | Grant or award | +14,255 | — | — |
| Jan 2, 2026 | Black Stone Minerals L.P. | Grant or award | +1,410 | $13.29 | $18,739 |
| Oct 3, 2025 | Black Stone Minerals L.P. | Grant or award | +1,426 | $13.14 | $18,738 |
| Jul 3, 2025 | Black Stone Minerals L.P. | Grant or award | +1,433 | $13.08 | $18,744 |
| Apr 4, 2025 | Black Stone Minerals L.P. | Grant or award | +1,227 | $15.27 | $18,736 |
| Jan 13, 2025 | Black Stone Minerals L.P. | Grant or award | +13,324 | — | — |
| Jan 3, 2025 | Black Stone Minerals L.P. | Grant or award | +1,284 | $14.60 | $18,746 |
| Oct 4, 2024 | Black Stone Minerals L.P. | Grant or award | +1,241 | $15.10 | $18,739 |
| Aug 15, 2024 | Black Stone Minerals L.P. | Open-market purchase | +34,200 | $14.62 | $500,004 |
Questions about D. Mark DeWalch
What boards is D. Mark DeWalch on?
D. Mark DeWalch sits on the board of Black Stone Minerals L.P.
How long has D. Mark DeWalch served on boards?
Our records show at least 4 years of board service across 1 board, the earliest from 2023.
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