Who
D. Mark DeWalch
Director
Company insider
Files Form 4 as: Director, Black Stone Minerals, L.P.
In numbers
- Trades disclosed
- 103
- Buys
- 12
- Sells
- 0
- Bought
- $5.0M
- Sold
- $0
- Companies
- 1
- Companies where not an officer
- 1
- First trade
- 6 May 2015
- Last trade
- 2 Oct 2026
- Last filed
- 5 Oct 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 2 Oct 2026filed 5 Oct 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,309 at $14.32 | filing |
| 2 Jul 2026filed 2 Jul 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,342 at $13.97 | filing |
| 2 Jul 2026filed 2 Jul 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,342 at $13.97 | filing |
| 1 Jun 2026filed 2 Jun 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Bought | $495K36,363 at $13.62 | filing |
| 1 Jun 2026filed 2 Jun 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Bought | $495K36,363 at $13.62 | filing |
| 29 May 2026filed 2 Jun 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Bought | $490K36,363 at $13.48 | filing |
| 29 May 2026filed 2 Jun 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Bought | $490K36,363 at $13.48 | filing |
| 28 May 2026filed 28 May 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Bought | $497K37,650 at $13.21 | filing |
| 28 May 2026filed 28 May 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Bought | $497K37,650 at $13.21 | filing |
| 2 Apr 2026filed 6 Apr 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,240 at $15.12 | filing |
| 2 Apr 2026filed 6 Apr 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,240 at $15.12 | filing |
| 13 Jan 2026filed 15 Jan 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | —14,255 at $0.00 | filing |
| 13 Jan 2026filed 15 Jan 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | —14,255 at $0.00 | filing |
| 2 Jan 2026filed 6 Jan 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,410 at $13.29 | filing |
| 2 Jan 2026filed 6 Jan 2026 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,410 at $13.29 | filing |
| 3 Oct 2025filed 7 Oct 2025 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,426 at $13.14 | filing |
| 3 Jul 2025filed 3 Jul 2025 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,433 at $13.08 | filing |
| 4 Apr 2025filed 7 Apr 2025 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,227 at $15.27 | filing |
| 13 Jan 2025filed 15 Jan 2025 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | —13,324 at $0.00 | filing |
| 3 Jan 2025filed 7 Jan 2025 | BSM Black Stone Minerals, L.POil & Gas E&P | SEC FORM 4 Code A | $19K1,284 at $14.60 | filing |
News
Black Stone Minerals (NYSE:BSM) Share Price Breaks Above 50 Day Moving Average on Analyst DowngradeBSM · dailypolitical.com · 22 Oct 2026
0 headlines in the last 90 days name D. Mark DeWalch; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.