BSM
Black Stone Minerals, L.P. · Energy
Insiders sold $26.6M net in the last 90 days ·1 seller, 1 buyer· latest Form 4 filed Aug 10, 2026
Insider Buying
$2.9M
reported purchases (SEC code P)
Insider Selling
$29.5M
reported sales (SEC code S)
Unique Insiders
5
in the rolling window
Latest filing
Aug 19, 2026
Whitehead James
Black Stone Minerals, L.P. (BSM) has 60 SEC Form 4 filings (72 transaction rows) in the rolling window, disclosed by 5 distinct insiders. Most recent filing: Aug 19, 2026.
Inside the rolling window, 5 insiders at Black Stone Minerals, L.P. reported 12 open-market purchases totaling $2.9M and 5 open-market sales totaling $29.5M. The most active filer is Executive Chairman Carter Thomas L Jr with 9 filings. Insiders have net sold $27.1M over the trailing 6 months. The most recent open-market filing is a sale of 2,127,105 shares by Director Whitehead James, dated Aug 6, 2026, worth $28.1M.
- Industry:Oil & Gas Exploration & Production
- CEO:H. Taylor DeWalch
- Employees:129
- HQ:Houston, TX, US
- IPO:2015-04-30
| Source | |||||||
|---|---|---|---|---|---|---|---|
Whitehead JamesFirst filing | Director | Sale | 2,127,105 | $28.1M | Aug 10 | +3.2% | SEC ↗ |
| Director | Purchase | 36,363 | $490K | Jun 2 | +9.1% | SEC ↗ | |
| Director | Purchase | 36,363 | $495K | Jun 2 | +9.1% | SEC ↗ | |
DeWalch D MarkFirst filing | Director | Purchase | 37,650 | $497K | May 28 | +11.5% | SEC ↗ |
| Executive Chairman | Purchase | 1,120 | $15K | May 14 | +7.7% | SEC ↗ | |
Longmaid Ashley JFirst filing | Director | Sale | 11,128 | $150K | May 13 | +9.5% | SEC ↗ |
Carter Thomas L JrFirst in 8 months | Executive Chairman | Purchase | 23,604 | $314K | May 12 | +9.8% | SEC ↗ |
Carter Thomas L JrFirst in 8 months | Executive Chairman | Purchase | 25,000 | $337K | May 12 | +9.8% | SEC ↗ |
Carter Thomas L JrFirst in 8 months | Executive Chairman | Purchase | 19,154 | $258K | May 12 | +9.8% | SEC ↗ |
| SVP, General Counsel, and Sec | Sale | 29,386 | $425K | May 6 | — | SEC ↗ | |
| SVP, General Counsel, and Sec | Sale | 30,276 | $462K | May 6 | — | SEC ↗ | |
| SVP, General Counsel, and Sec | Sale | 29,386 | $404K | May 6 | — | SEC ↗ | |
| CEO, President, and Chairman | Purchase | 1,300 | $16K | Sep 12 | — | SEC ↗ | |
| CEO, President, and Chairman | Purchase | 14,000 | $176K | Sep 12 | — | SEC ↗ | |
Carter Thomas L JrFirst filing | CEO, President, and Chairman | Purchase | 13,527 | $161K | Sep 10 | — | SEC ↗ |
Carter Thomas L JrFirst filing | CEO, President, and Chairman | Purchase | 1,307 | $16K | Sep 10 | — | SEC ↗ |
Carter Thomas L JrFirst filing | CEO, President, and Chairman | Purchase | 10,536 | $130K | Sep 10 | — | SEC ↗ |
Congress trading BSM 2 all-time
- DSen. Thomas Richard CarperPurchase$1,001 - $15,0002023-02-21
- DSen. Thomas Richard CarperPurchase$1,001 - $15,0002023-01-11
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does BSM have?
Black Stone Minerals, L.P. (BSM) has 60 SEC Form 4 filings (72 transaction rows) in the rolling 365-day window, disclosed by 5 distinct insiders. Most recent filing: Aug 19, 2026.
When was the most recent SEC Form 4 filing for BSM?
The most recent Form 4 filing for BSM on Tracefour is dated Aug 19, 2026.
Who is the most active insider at BSM?
The most active SEC Form 4 filer at BSM in the rolling window is Executive Chairman Carter Thomas L Jr, with 9 filings.
What is the net insider flow at BSM over the last 6 months?
Over the trailing 180 days, insiders at BSM have net sold $27.1M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at BSM in the current window?
Inside the rolling window, insiders at BSM bought $2.9M and sold $29.5M based on SEC Form 4 filings.
Can I get alerts for BSM insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Black Stone Minerals, L.P. (BSM). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Black Stone Minerals, L.P. is in the Energy sector.