It has been a mixed year for Black Stone Minerals, L.P. insiders: $2.4 million bought by two people and $30.4 million sold by three, so more selling than buying overall.
The largest purchase came from DeWalch D Mark (Director), about $497,000.
Looking at the quarterly pattern: Last full quarter: net selling by insiders. Insiders bought in 3 of the last 7 full quarters. On the institutional side, 200 funds reported holding BSM at the end of Q2 2026, and more funds bought than sold.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Aug 10, 2026 | Whitehead James | Director | Sell | 498,343 | $13.21 | $6.6M | SEC |
| Aug 10, 2026 | Whitehead James | Director | Sell | 1,628,762 | $13.21 | $21.5M | SEC |
| Jun 2, 2026 | DeWalch D Mark | Director | Buy | 36,363 | $13.48 | $490K | SEC |
| Jun 2, 2026 | DeWalch D Mark | Director | Buy | 36,363 | $13.62 | $495K | SEC |
| May 28, 2026 | DeWalch D Mark | Director | Buy | 37,650 | $13.21 | $497K | SEC |
| May 14, 2026 | Carter Thomas L Jr | Chair | Buy | 1,120 | $13.50 | $15K | SEC |
| May 13, 2026 | Longmaid Ashley J | Director | Sell | 11,128 | $13.45 | $150K | SEC |
| May 12, 2026 | Carter Thomas L Jr | Chair | Buy | 25,000 | $13.47 | $337K | SEC |
| May 12, 2026 | Carter Thomas L Jr | Chair | Buy | 19,154 | $13.48 | $258K | SEC |
| May 12, 2026 | Carter Thomas L Jr | Chair | Buy | 23,604 | $13.32 | $314K | SEC |
| May 6, 2026 | Putman Luke Stevens | Executive Officer | Sell | 29,386 | $14.45 | $425K | SEC |
| May 6, 2026 | Putman Luke Stevens | Executive Officer | Sell | 29,386 | $13.75 | $404K | SEC |
| May 6, 2026 | Putman Luke Stevens | Executive Officer | Sell | 30,276 | $15.25 | $462K | SEC |
| Apr 7, 2026 | Putman Luke Stevens | Executive Officer | Sell | 29,386 | $14.45 | $425K | SEC |
| Mar 6, 2026 | Putman Luke Stevens | Executive Officer | Sell | 30,276 | $15.25 | $462K | SEC |
In the last 12 months Black Stone Minerals, L.P. insiders made open-market purchases worth about $2.4 million and sales worth about $30.4 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in BSM was filed on 2026-08-10.
200 investment managers reported holding BSM in SEC Form 13F filings for Q2 2026.
No congressional trades in BSM were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).