Updated Jul 16, 2026
DeWalch D Mark has filed 3 SEC Form 4 filings across 1 company in the last 90 days — buying. Lifetime open-market purchases: $1.48M.

Based on the provided SEC filing context, Dewalch D Mark appears to serve as a Director of Black Stone Minerals, L.P. as of the filing date 2026-04-06. Black Stone Minerals, L.P. is an energy company involved in oil and natural gas operations. Public SEC filings list Mark in the director role, but there is limited publicly available information about other biographical details, prior positions, or education. Notwithstanding the limited data, the SEC context identifies him as a corporate insider with a governance role at the referenced partnership.
| Role | Director |
|---|---|
| Notability | 20/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-02 | BSM | Black Stone Minerals, L.P. | A — Grant or award | 1.3K | $13.97 | $19K |
| 2026-06-02 | BSM | Black Stone Minerals, L.P. | P — Open-market purchase | 36.4K | $13.62 | $495K |
| 2026-06-02 | BSM | Black Stone Minerals, L.P. | P — Open-market purchase | 36.4K | $13.48 | $490K |
| 2026-05-28 | BSM | Black Stone Minerals, L.P. | P — Open-market purchase | 37.6K | $13.21 | $497K |
| 2026-04-06 | BSM | Black Stone Minerals, L.P. | A — Grant or award | 1.2K | $15.12 | $19K |
| 2026-01-15 | BSM | Black Stone Minerals, L.P. | A — Grant or award | 14.3K | $0.00 | |
| 2025-10-03 | BSM | Black Stone Minerals, L.P. | A — Grant or award | 1.4K | $13.14 | $19K |
| 2025-07-03 | BSM | Black Stone Minerals, L.P. | A — Grant or award | 1.4K | $13.08 | $19K |
| 2024-10-08 | BSM | Black Stone Minerals, L.P. | A — Grant or award | 1.2K | $15.10 | $19K |
Based on the provided SEC filing context, Dewalch D Mark appears to serve as a Director of Black Stone Minerals, L.P. as of the filing date 2026-04-06. Black Stone Minerals, L.P. is an energy company involved in oil and natural gas operations. Public SEC filings list Mark in the director role, but there is limited publicly available information about other biographical details,…
3 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 3 open-market purchases ($1.48M) and 0 open-market sales () across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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