NYSE · CIK 0001621434
BSM Black Stone Minerals, L.P.
Insider trading from SEC Form 4. Last filing 8 d ago. Close $14.81 on Oct 9, 2026, +30% from the 52-week low and -2% from the high.
Black Stone Minerals, L.P. (BSM) has 111 SEC Form 4 filings on file from 15 insiders, the latest filed on Oct 5, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 1 open-market sell worth $28M, net -$28M.
18 open-market trades have been scored at BSM. The newest: James Whitehead (director) sold $28M of stock on Aug 6, 2026, filed Aug 10, 2026, scored 70 (notable). 2 insiders sold within 14 days of each other around May 12, 2026.
BSM closed at $14.81 on Oct 9, 2026, 30% above its 52-week low and 2% below its 52-week high.
7 Form 144 notices of planned sales are on file, the latest filed Aug 6, 2026.
Last 90 days
Net insider value
-$28M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
1
$28M by 1 insider
Insiders on file
15
with a Form 4 at this company
Price and insider trades, last year
BSMOct 9, 2026 · close 14.81
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Black Stone Minerals, L.P., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 70Notable | James Whitehead director sell | $28M 2,127,105 shares | -427% | +30% from low-4% from high | |
| 48Moderate | D Mark DeWalch director buy | $985k 72,726 shares | +13% | +24% from low-10% from high | |
| 36Weak | D Mark DeWalch director buy | $497k 37,650 shares | +10% | +21% from low-12% from high | |
| 20Weak | Thomas L Carter Jr Executive Chairman buy | $15k 1,120 shares | +0% | +23% from low-10% from high | |
| 34Weak | Ashley J Longmaid director sell | $150k 11,128 shares | -7% | +23% from low-10% from high | |
| 44Moderate | Thomas L Carter Jr Executive Chairman buy | $909k 67,758 shares | +2% | +21% from low-12% from high | |
| 19Weak | Luke Stevens Putman SVP, General Counsel, and Sec sell | $404k 29,386 shares | -4% | +22% from low-11% from high | |
| 12Weak | Luke Stevens Putman SVP, General Counsel, and Sec sell | $462k 30,276 shares | -4% | +38% from low0% from high | |
| 11Weak | Luke Stevens Putman SVP, General Counsel, and Sec sell | $425k 29,386 shares | -4% | +29% from low-6% from high | |
| 31Weak | Luke Stevens Putman SVP, General Counsel, and Sec sell | $425k 29,386 shares | -4% | +29% from low-6% from high | |
| 12Weak | Luke Stevens Putman SVP, General Counsel, and Sec sell | $462k 30,276 shares | -4% | +38% from low0% from high | |
| 37Weak | Thomas L Carter Jr CEO, President, and Chairman buy | $192k 15,300 shares | +0% | - | |
| 39Weak | Thomas L Carter Jr CEO, President, and Chairman buy | $307k 25,370 shares | +1% | - | |
| 48Moderate | Thomas L Carter Jr CEO, President, and Chairman buy | $492k 41,000 shares | +1% | - | |
| 35Weak | Thomas L Carter Jr CEO, President, and Chairman buy | $114k 9,200 shares | +0% | - | |
| 53Moderate | Thomas L Carter Jr CEO, President, and Chairman buy | $879k 72,210 shares | +2% | - | |
| 38Weak | Carrie Pearson Clark SVP, Chief Commercial Officer sell | $500k 36,900 shares | -18% | - | |
| 32Weak | Thomas L Carter Jr CEO, President, and Chairman buy | $196k 14,500 shares | +0% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Aug 6, 2026 | LACY PROPERTIES, LTD. Director | 1,628,762 0.77% of outstanding | $22M | Aug 6, 2026 | none |
| Aug 6, 2026 | EAGLE GATHERING SYSTEM Director | 498,343 0.23% of outstanding | $6.6M | Aug 6, 2026 | none |
| May 12, 2026 | ASHLEY J LONGMAID Director | 11,128 0.01% of outstanding | $150k | May 12, 2026 | none |
| May 5, 2026 | LUKE STEVENS PUTMAN Officer | 29,386 0.01% of outstanding | $418k | May 5, 2026 | $886k |
| Apr 6, 2026 | LUKE STEVENS PUTMAN Officer | 29,386 0.01% of outstanding | $431k | Apr 6, 2026 | $462k |
| Mar 5, 2026 | LUKE STEVENS PUTMAN Officer | 30,276 0.01% of outstanding | $458k | Mar 5, 2026 | none |
| May 29, 2025 | CARRIE P CLARK Officer | 36,900 0.02% of outstanding | $500k | May 29, 2025 | none |
Transactions
The newest 50 of 133 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Alexander D. Stuart director | AGrant or award Common units representing limited partner interests | +1,658 | $14.32 | $24k | 2,041,733 | 8 d ago |
| Oct 2, 2026 | Jerry V. Kyle Jr. director | AGrant or award Common units representing limited partner interests | +1,309 | $14.32 | $19k | 323,798 | 8 d ago |
| Oct 2, 2026 | Anne Lenoir Hamman director | AGrant or award Common units representing limited partner interests | +1,309 | $14.32 | $19k | 9,737 | 8 d ago |
| Oct 2, 2026 | William E. Randall director | AGrant or award Common units representing limited partner interests | +1,571 | $14.32 | $22k | 194,955 | 8 d ago |
| Oct 2, 2026 | D Mark DeWalch director | AGrant or award Common units representing limited partner interests | +1,309 | $14.32 | $19k | 434,146 | 8 d ago |
| Aug 18, 2026 | Alexander D. Stuart director | GGift Common units representing limited partner interests | -15,900 | $0.00 | $0 | 2,040,075 | Aug 19, 2026 |
| Aug 6, 2026 | James Whitehead director | SOpen-market sale Common units representing limited partner interestsindirect: By Eagle Gathering System Ltd. | -498,343 | $13.21 | $6.6M | 0 | Aug 10, 2026 |
| Aug 6, 2026 | James Whitehead director | SOpen-market sale Common units representing limited partner interestsindirect: By Lacy Properties Ltd. | -1,628,762 | $13.21 | $22M | 646,058 | Aug 10, 2026 |
| Jul 31, 2026 | Jerry V. Kyle Jr. director | JOther Common units representing limited partner interestsindirect: By trust | +7,665 | - | - | 7,665 | Aug 4, 2026 |
| Jul 2, 2026 | Jerry V. Kyle Jr. director | AGrant or award Common units representing limited partner interests | +1,342 | $13.97 | $19k | 322,489 | Jul 2, 2026 |
| Jul 2, 2026 | D Mark DeWalch director | AGrant or award Common units representing limited partner interests | +1,342 | $13.97 | $19k | 432,837 | Jul 2, 2026 |
| Jul 2, 2026 | Alexander D. Stuart director | AGrant or award Common units representing limited partner interests | +1,700 | $13.97 | $24k | 2,055,975 | Jul 2, 2026 |
| Jul 2, 2026 | William E. Randall director | AGrant or award Common units representing limited partner interests | +1,610 | $13.97 | $22k | 193,384 | Jul 2, 2026 |
| Jul 2, 2026 | Anne Lenoir Hamman director | AGrant or award Common units representing limited partner interests | +1,342 | $13.97 | $19k | 8,428 | Jul 2, 2026 |
| May 29, 2026 | D Mark DeWalch director | POpen-market purchase Common units representing limited partner interestsindirect: By DeWalch Diversified LP | +36,363 | $13.48 | $490k | 594,885 | Jun 2, 2026 |
| Jun 1, 2026 | D Mark DeWalch director | POpen-market purchase Common units representing limited partner interestsindirect: By DeWalch Diversified LP | +36,363 | $13.62 | $495k | 631,248 | Jun 2, 2026 |
| May 28, 2026 | D Mark DeWalch director | POpen-market purchase Common units representing limited partner interests | +37,650 | $13.21 | $497k | 431,495 | May 28, 2026 |
| May 13, 2026 | Thomas L Carter Jr Executive Chairman | POpen-market purchase Common units representing limited partner interests | +1,120 | $13.50 | $15k | 3,682,724 | May 14, 2026 |
| May 12, 2026 | Ashley J Longmaid director | SOpen-market sale Common units representing limited partner interests | -11,128 | $13.45 | $150k | 137,335 | May 13, 2026 |
| May 8, 2026 | Thomas L Carter Jr Executive Chairman | POpen-market purchase Common units representing limited partner interests | +23,604 | $13.32 | $314k | 3,637,450 | May 12, 2026 |
| May 11, 2026 | Thomas L Carter Jr Executive Chairman | POpen-market purchase Common units representing limited partner interests | +25,000 | $13.47 | $337k | 3,662,450 | May 12, 2026 |
| May 12, 2026 | Thomas L Carter Jr Executive Chairman | POpen-market purchase Common units representing limited partner interests | +19,154 | $13.48 | $258k | 3,681,604 | May 12, 2026 |
| Mar 5, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | SOpen-market sale Common units representing limited partner interests10b5-1 | -30,276 | $15.25 | $462k | 761,417 | May 6, 2026 |
| May 5, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | SOpen-market sale Common units representing limited partner interests10b5-1 | -29,386 | $13.75 | $404k | 702,645 | May 6, 2026 |
| Apr 6, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | SOpen-market sale Common units representing limited partner interests10b5-1 | -29,386 | $14.45 | $425k | 732,031 | May 6, 2026 |
| Apr 6, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | SOpen-market sale Common units representing limited partner interests | -29,386 | $14.45 | $425k | 732,031 | Apr 7, 2026 |
| Apr 2, 2026 | Jerry V. Kyle Jr. director | AGrant or award Common units representing limited partner interests | +1,240 | $15.12 | $19k | 321,147 | Apr 6, 2026 |
| Apr 2, 2026 | D Mark DeWalch director | AGrant or award Common units representing limited partner interests | +1,240 | $15.12 | $19k | 393,845 | Apr 6, 2026 |
| Apr 2, 2026 | Alexander D. Stuart director | AGrant or award Common units representing limited partner interests | +1,570 | $15.12 | $24k | 2,054,275 | Apr 6, 2026 |
| Apr 2, 2026 | William E. Randall director | AGrant or award Common units representing limited partner interests | +1,488 | $15.12 | $22k | 191,774 | Apr 6, 2026 |
| Apr 2, 2026 | Anne Lenoir Hamman director | AGrant or award Common units representing limited partner interests | +473 | $15.12 | $7,152 | 7,086 | Apr 6, 2026 |
| Mar 11, 2026 | Anne Lenoir Hamman director | AGrant or award Common units representing limited partner interests | +6,613 | $0.00 | $0 | 6,613 | Mar 12, 2026 |
| Mar 5, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | SOpen-market sale Common units representing limited partner interests10b5-1 | -30,276 | $15.25 | $462k | 761,417 | Mar 6, 2026 |
| Feb 24, 2026 | Thomas L Carter Jr Executive Chairman | AGrant or award Common units representing limited partner interests | +136,315 | $0.00 | $0 | 3,667,487 | Feb 26, 2026 |
| Feb 24, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | AGrant or award Common units representing limited partner interests | +68,853 | $0.00 | $0 | 816,995 | Feb 26, 2026 |
| Feb 24, 2026 | Taylor DeWalch Co-CEO and President | AGrant or award Common units representing limited partner interests | +1,958 | $0.00 | $0 | 141,847 | Feb 26, 2026 |
| Feb 24, 2026 | Chris Bonner SVP, CFO, and Treasurer | AGrant or award Common units representing limited partner interests | +1,447 | $0.00 | $0 | 51,108 | Feb 26, 2026 |
| Feb 24, 2026 | Fowler Carter Co-CEO and President | AGrant or award Common units representing limited partner interests | +1,330 | $0.00 | $0 | 125,704 | Feb 26, 2026 |
| Feb 24, 2026 | Thomas L Carter Jr Executive Chairman | FTax withholding Common units representing limited partner interests | -53,641 | $15.23 | $817k | 3,613,846 | Feb 26, 2026 |
| Feb 24, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | FTax withholding Common units representing limited partner interests | -25,302 | $15.23 | $385k | 791,693 | Feb 26, 2026 |
| Feb 24, 2026 | Taylor DeWalch Co-CEO and President | FTax withholding Common units representing limited partner interests | -478 | $15.23 | $7,280 | 141,369 | Feb 26, 2026 |
| Feb 24, 2026 | Chris Bonner SVP, CFO, and Treasurer | FTax withholding Common units representing limited partner interests | -430 | $15.23 | $6,549 | 50,678 | Feb 26, 2026 |
| Feb 24, 2026 | Fowler Carter Co-CEO and President | FTax withholding Common units representing limited partner interests | -325 | $15.23 | $4,950 | 125,379 | Feb 26, 2026 |
| Feb 4, 2026 | Thomas L Carter Jr Executive Chairman | AGrant or award Common units representing limited partner interests | +53,404 | $0.00 | $0 | 3,531,172 | Feb 6, 2026 |
| Feb 4, 2026 | Luke Stevens Putman SVP, General Counsel, and Sec | AGrant or award Common units representing limited partner interests | +65,420 | $0.00 | $0 | 748,142 | Feb 6, 2026 |
| Feb 4, 2026 | Taylor DeWalch Co-CEO and President | AGrant or award Common units representing limited partner interests | +80,106 | $0.00 | $0 | 139,889 | Feb 6, 2026 |
| Feb 4, 2026 | Chris Bonner SVP, CFO, and Treasurer | AGrant or award Common units representing limited partner interests | +42,723 | $0.00 | $0 | 49,661 | Feb 6, 2026 |
| Feb 4, 2026 | Fowler Carter Co-CEO and President | AGrant or award Common units representing limited partner interests | +80,106 | $0.00 | $0 | 124,374 | Feb 6, 2026 |
| Feb 4, 2026 | Erin Leah Phillips Controller (PAO) | AGrant or award Common units representing limited partner interests | +2,002 | $0.00 | $0 | 3,911 | Feb 6, 2026 |
| Jan 13, 2026 | Carin Marcy Barth director | AGrant or award Common units representing limited partner interests | +14,255 | $0.00 | $0 | 142,447 | Jan 15, 2026 |
50 of 133 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- Carin Marcy Barthdirector
- Chris BonnerSVP, CFO, and Treasurer
- Fowler CarterCo-CEO and President
- Thomas L Carter JrExecutive Chairman
- Carrie Pearson ClarkSVP, Chief Commercial Officer
- D Mark DeWalchdirector
- Taylor DeWalchCo-CEO and President
- Anne Lenoir Hammandirector
- Jerry V. Kyle Jr.director
- Ashley J Longmaiddirector
- Erin Leah PhillipsController (PAO)
- Luke Stevens PutmanSVP, General Counsel, and Sec
- William E. Randalldirector
- Alexander D. Stuartdirector
- James Whiteheaddirector
Questions about BSM
Answered from the filings on this page, as of the latest one.
Are insiders buying BSM?
As of Oct 5, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 1 open-market sell worth $28M by 1 insider at Black Stone Minerals, L.P. in the last 90 days, net -$28M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade BSM on the open market?
James Whitehead (director) sold $28M of BSM on Aug 6, 2026 and filed the Form 4 on Aug 10, 2026. InsiderTell scored 70 (notable).
How many insiders file Form 4 at Black Stone Minerals, L.P.?
15 people have filed a Form 4 at Black Stone Minerals, L.P., among them Carin Marcy Barth (director), Chris Bonner (SVP, CFO, and Treasurer), Fowler Carter (Co-CEO and President). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.