// company-profile
Black Stone Minerals, L.P.
BSM// activity-summary
Recent insider activity is bullish. Over the last 30 days, 3 insiders purchased shares (net $1.5M). Buying was led by DeWalch D Mark.
// 90-day insight
Over the last 90 days, Black Stone Minerals, L.P. insiders bought $2.5M (12 transactions) and sold $150K (1 transaction).
- Most active insider: DeWalch D Mark with 4 transactions totaling $1.5M.
- Largest single purchase: $497K by DeWalch D Mark on May 28, 2026.
- 67% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Black Stone Minerals, L.P. as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 1, 2026 | DeWalch D Mark | BSM | Purchase | 36,363 | $13.62 | $495K |
| May 29, 2026 | DeWalch D Mark | BSM | Purchase | 36,363 | $13.48 | $490K |
| May 28, 2026 | DeWalch D Mark | BSM | Purchase | 37,650 | $13.21 | $497K |
| May 13, 2026 | Carter Thomas L Jr | BSM | Purchase | 1,120 | $13.50 | $15K |
| May 12, 2026 | Carter Thomas L Jr | BSM | Purchase | 19,154 | $13.48 | $258K |
45 more transactions hidden
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