🕵️ Black Stone Minerals, L.P. ($BSM)
SEC insider & ownership activity, last 12 months · CIK 1621434 · every row links its SEC filing
Over the last 12 months insiders sold $1.4M against $4.4M of open-market buying. Thomas L. Carter Jr. bought $2.9M (Aug–May). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $4.4M (18 lots) · 2 sellers, $1.4M (4 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Thomas L. Carter Jr. | 15 | $2.9M | 0 | – | May 13, 2026 |
| Dewalch D Mark | 3 | $1.5M | 0 | – | Jun 1, 2026 |
| Luke Stevens Putman | 0 | – | 3 | $1.3M | May 5, 2026 |
| Ashley J Longmaid | 0 | – | 1 | $150K | May 12, 2026 |
5%+ holders
No current 5%+ beneficial-ownership positions on file.
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Ashley J Longmaid | $150K | May 12, 2026 | filing ↗ |
| Luke Stevens Putman | $418K | May 5, 2026 | filing ↗ |
| Luke Stevens Putman | $431K | Apr 6, 2026 | filing ↗ |
| Luke Stevens Putman | $458K | Mar 5, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 11, 2026 | filing ↗ |
| Earnings (2.02) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |
| Earnings (2.02) | Feb 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 23, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Earnings (2.02) | Nov 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 3, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 30, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 30, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 16, 2025 | filing ↗ |
| Material agreement (1.01) | Aug 22, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Aug 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 22, 2025 | filing ↗ |
| Earnings (2.02) | Aug 4, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2025 | filing ↗ |