Black Stone Minerals, L.p. insider trading
Every open-market purchase and sale by Black Stone Minerals, L.p.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.
| Date | Insider | Trade | Shares | Price | Value | 1M after | 3M after | 6M after |
|---|
Does following Black Stone Minerals, L.p.’s insiders pay?
From June 15, 2015 to August 10, 2026, 15 insiders reported 55 open-market purchases and 17 sales not made under a pre-set plan in Black Stone Minerals, L.p. Twelve months after each purchase was reported, the shares were −6.0% against the S&P 500 on average (median −5.4%), over 51 purchases with a full year of prices; 47% beat the index. After sales, the shares moved +7.8% against the index over 12 months (a negative figure means selling was the right call). Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on June 16, 2015 into $9,529 by November 2, 2026, −0.4% a year. It held shares 81% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $31,610 (+10.7% a year), and held throughout $43,473 (+13.8%).
| Insider | Role | Purchases | 12 months after their purchases | Beat the S&P 500 | Sales | 12 months after their sales | Latest report |
|---|---|---|---|---|---|---|---|
| Carter Thomas L Jr | Executive Chairman | 32 | −5.3% (30) | 50% | 0 | — | May 14, 2026 |
| Dewalch D Mark | Director | 8 | −30.9% (6) | 0% | 0 | — | June 2, 2026 |
| Putman Luke Stevens | SVP, General Counsel, and Sec | 0 | — | — | 5 | +15.2% (4) | April 7, 2026 |
| Stuart Alexander D. | Director | 5 | +1.6% (5) | 60% | 0 | — | March 6, 2018 |
| Haeflinger Ricky J. | Director | 4 | −5.2% (4) | 25% | 0 | — | March 8, 2017 |
| Mathis William N. | Director | 3 | −4.0% (3) | 67% | 0 | — | November 13, 2018 |
| Morris Brock | SVP, Engineering and Geology | 0 | — | — | 3 | −22.0% (3) | March 8, 2019 |
| Smajstrla Dawn | VP, Chief Accounting Officer | 0 | — | — | 3 | +18.4% (3) | November 9, 2022 |
| Clark Carrie Pearson | SVP, Chief Commercial Officer | 0 | — | — | 2 | −20.5% (2) | May 30, 2025 |
| Wood Jeffrey P. | President, CFO | 0 | — | — | 2 | +50.1% (2) | March 3, 2022 |
| Bardel William G | Director | 1 | +30.1% (1) | 100% | 0 | — | November 16, 2015 |
| Kyle Jerry V. JR. | Director | 1 | +5.1% (1) | 100% | 0 | — | August 25, 2015 |
| Longmaid Ashley J | Director | 0 | — | — | 1 | — | May 13, 2026 |
| Longmaid John H. | Director | 1 | +30.1% (1) | 100% | 0 | — | November 16, 2015 |
| Whitehead James | Director | 0 | — | — | 1 | — | August 10, 2026 |
When several insiders traded Black Stone Minerals, L.p.
Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Black Stone Minerals, L.p. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 8 buying crowds with six months of prices, it averaged +0.4% against the index. One company's history is too short to judge by; the test across every company is the better guide.
| Month | Crowd | 3 months on, vs S&P 500 | 6 months | 12 months |
|---|---|---|---|---|
| July 31, 2026 | 2 buying | −2.0% | not yet | not yet |
| September 30, 2024 | 2 buying | −5.5% | +7.9% | −21.7% |
| November 30, 2023 | 2 buying | −23.7% | −21.3% | −35.6% |
| March 31, 2023 | 2 buying | −4.7% | +10.7% | −10.0% |
| November 30, 2018 | 2 buying | +5.5% | −1.9% | −37.3% |
| March 29, 2018 | 2 buying | +10.4% | +2.9% | +5.7% |
| March 31, 2017 | 3 buying | −5.9% | +1.2% | −3.7% |
| May 31, 2016 | 2 buying | +1.1% | +21.2% | −3.7% |
| August 31, 2015 | 4 buying | −1.5% | −17.5% | −1.1% |