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Black Stone Minerals, L.P. stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+16.3% to $13.98
Black Stone Minerals, L.P. (BSM) stock rose 16% over the last 252 sessions, to $13.98. On the way it reported 4 quarters, its insiders filed 10 open-market trades and 2 Form 144 notices of planned sales, and the company filed 2 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 2, 2026 | Earnings | Earnings: beat the EPS estimate by 34.0% | −0.7% (−0.3% vs SPY) | −3.6% (−0.8% vs SPY) | — |
| Aug 6, 2026 | Form 144 | Form 144: Lacy Properties, Ltd. plans to sell $21.5M | −0.3% (−0.2% vs SPY) | +1.7% (+1.3% vs SPY) | +3.1% (+2.7% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Eagle Gathering System plans to sell $6.6M | −0.3% (−0.2% vs SPY) | +1.7% (+1.3% vs SPY) | +3.1% (+2.7% vs SPY) |
| Aug 6, 2026 | Insider sale | Whitehead James sold $28.1M | −0.3% (−0.2% vs SPY) | +1.7% (+1.3% vs SPY) | +3.1% (+2.7% vs SPY) |
| Aug 3, 2026 | Earnings | Earnings: beat the EPS estimate by 20.0% | +0.7% (−0.7% vs SPY) | −3.6% (−7.1% vs SPY) | +1.8% (−0.9% vs SPY) |
| Jun 1, 2026 | Insider buy | DeWalch D Mark bought $495K | +0.7% (+0.5% vs SPY) | +2.4% (+4.9% vs SPY) | +3.0% (+4.0% vs SPY) |
| May 29, 2026 | Insider buy | DeWalch D Mark bought $490K | +1.9% (+1.6% vs SPY) | +4.2% (+3.9% vs SPY) | +4.8% (+6.4% vs SPY) |
| May 28, 2026 | Insider buy | DeWalch D Mark bought $497K | +0.2% (−0.3% vs SPY) | +4.7% (+4.2% vs SPY) | +6.0% (+8.6% vs SPY) |
| May 13, 2026 | Insider buy | Carter Thomas L Jr bought $15K | +0.2% (−0.3% vs SPY) | +4.6% (+5.2% vs SPY) | +2.2% (+2.2% vs SPY) |
| May 12, 2026 | Insider sale | Longmaid Ashley J sold $150K | +1.0% (+1.2% vs SPY) | +5.0% (+5.0% vs SPY) | +3.1% (+5.0% vs SPY) |
| May 12, 2026 | Insider buy | Carter Thomas L Jr bought $258K | +1.0% (+1.2% vs SPY) | +5.0% (+5.0% vs SPY) | +3.1% (+5.0% vs SPY) |
| May 11, 2026 | Insider buy | Carter Thomas L Jr bought $337K | +0.6% (+0.4% vs SPY) | +5.2% (+5.0% vs SPY) | +2.9% (+3.0% vs SPY) |
| May 8, 2026 | Insider buy | Carter Thomas L Jr bought $314K | +1.7% (+0.9% vs SPY) | +5.3% (+3.0% vs SPY) | +5.8% (+4.7% vs SPY) |
| May 4, 2026 | Earnings | Earnings: beat the EPS estimate by 20.0% | 0.0% (+0.4% vs SPY) | −4.6% (−6.9% vs SPY) | −2.4% (−7.6% vs SPY) |
| Apr 6, 2026 | Insider sale | Putman Luke Stevens sold $425K | −1.3% (−1.8% vs SPY) | −4.0% (−7.5% vs SPY) | −2.8% (−11.9% vs SPY) |
| Feb 23, 2026 | Earnings | Earnings: missed the EPS estimate by -19.3% | −1.4% (−0.4% vs SPY) | +0.2% (+0.7% vs SPY) | −0.6% (+4.2% vs SPY) |
| Feb 10, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.3% (+0.3% vs SPY) | −0.1% (+0.8% vs SPY) | +3.0% (+6.8% vs SPY) |
| Jan 7, 2026 | 8-K | Directors and officers: departures, appointments, pay | +2.7% (+2.7% vs SPY) | +5.9% (+5.8% vs SPY) | +11.4% (+11.3% vs SPY) |
Insiders’ record here
In the year on the chart, Black Stone Minerals, L.P.'s insiders reported 7 open-market buys ($2.4M) and 3 sales ($28.7M). Of the 10 old enough to score, 8 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was +3.3% and after a sale +2.4%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Black Stone Minerals, L.P.: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.