Beta4% was sold under disclosed trading plans, 96% with no plan disclosed. The largest seller, James Whitehead (Director), sold $28.1M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why
A share of stake is shown for 0 of the 3 officers and directors who sold. 17 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: Thomas Carter Jr., Alexander Stuart, James Whitehead, William Mathis, Mark DeWalch, Jerry Kyle Jr., Luke Putman, Anne Hamman, Michael Linn, William Randall, Carrie Clark, Ashley Longmaid, Carin Barth, Taylor DeWalch, Fowler Carter, Chris Bonner and Erin Phillips (share of stake is being verified).
Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.
Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
No officer or director trades were reported for the past 30 days. The most recent before that:
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Alexander Stuart Director | 15,900 | n/a | n/a | n/a | Aug 18, 2026 | Aug 19, 2026 |
No. Taylor DeWalch reported no open-market sales in the past 12 months.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 4% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 96% had no disclosed plan. A trading plan schedules sales in advance.
Yes. 2 officers or directors reported 7 purchases in the past 12 months (Form 4 code P; rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust are not counted).
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| James Whitehead Director | $28.1M 2.13M shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Luke Putman SVP, General Counsel, and Sec | $1.3M 89K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Ashley Longmaid Director | $150K 11K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Oct 16, 2025 | Sold | Held Oct 16, 2026 | Still held |
|---|---|---|---|---|
Thomas Carter Jr.!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Thomas Carter Jr. are complete. Executive Chairman, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Thomas Carter Jr.Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Thomas Carter Jr. are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −89Kwithheld by the company for taxes | ||||
Alexander Stuart!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Alexander Stuart are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Alexander StuartHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Alexander Stuart are complete; balances and unit counts will be added when the check is finished. −16Kgifted (net of own trusts) | ||||
James Whitehead!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for James Whitehead are complete. Director | n/a | −2.13M | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for James WhiteheadHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for James Whitehead are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
William Mathis!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for William Mathis are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for William MathisHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for William Mathis are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Mark DeWalch!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Mark DeWalch are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Mark DeWalchHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mark DeWalch are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jerry Kyle Jr.!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jerry Kyle Jr. are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jerry Kyle Jr.Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jerry Kyle Jr. are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Luke Putman!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Luke Putman are complete. SVP, General Counsel, and Sec | n/a | −89K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Luke PutmanHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Luke Putman are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −40Kwithheld by the company for taxes | ||||
Anne Hamman!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Anne Hamman are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Anne HammanHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Anne Hamman are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Michael Linn!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Michael Linn are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Michael LinnHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Michael Linn are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
William Randall!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for William Randall are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for William RandallHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for William Randall are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Carrie Clark!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Carrie Clark are complete. SVP, Chief Commercial Officer | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Carrie ClarkHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Carrie Clark are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Ashley Longmaid!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ashley Longmaid are complete. Director | n/a | −11K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Ashley LongmaidHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ashley Longmaid are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Carin Barth!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Carin Barth are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Carin BarthHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Carin Barth are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Taylor DeWalch!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Taylor DeWalch are complete. Co-CEO and President, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Taylor DeWalchHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Taylor DeWalch are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −5.9Kwithheld by the company for taxes | ||||
Fowler Carter!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Fowler Carter are complete. Co-CEO and President, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Fowler CarterHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Fowler Carter are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −2.8Kwithheld by the company for taxes | ||||
Chris Bonner!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Chris Bonner are complete. SVP, CFO, and Treasurer | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Chris BonnerHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chris Bonner are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −1.1Kwithheld by the company for taxes | ||||
Erin Phillips!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Erin Phillips are complete. Controller (PAO) | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Erin PhillipsHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Erin Phillips are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −211withheld by the company for taxes | ||||
Holdings and share of stake for Black Stone Minerals, L.P. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.
Officer and director open-market sales: $29.5M across 2,227,281 shares. Plan status and stated purpose are separate questions, and a sale can have both.
The lighter segment is sales with no plan disclosed in the filing ($28.2M), including tax-related sales outside a plan.
Sales with no 10b5-1 plan and no tax reference in the filing. $28.1M of it is James Whitehead. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: James Whitehead, Aug 6, 2026
138,851 shares ($2.0M) were withheld by the company for taxes, which isn't a market sale.
2 officers and directors bought shares in this period, in 7 trades(Form 4 code P, leaving out rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust). Across all their filings on record there are 98 purchase trades.
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| James Whitehead Director | 2.13M | $28.1M | 0% | 95% | Aug 6, 2026 to Aug 6, 2026 |
| Luke Putman SVP, General Counsel, and Sec | 89K | $1.3M | 100% | 4% | Mar 5, 2026 to May 5, 2026 |
| Ashley Longmaid Director | 11K | $150K | 0% | 0.5% | May 12, 2026 to May 12, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $0 | $0 | $0 | $0 |
| Dec 2025 | $0 | $0 | $0 | $0 |
| Jan 2026 | $0 | $0 | $0 | $0 |
| Feb 2026 | $0 | $0 | $0 | $0 |
| Mar 2026 | $462K | $462K | $0 | $0 |
| Apr 2026 | $425K | $425K | $0 | $0 |
| May 2026 | $554K | $404K | $0 | $150K |
| Jun 2026 | $0 | $0 | $0 | $0 |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $28.1M | $0 | $0 | $28.1M |
| Sep 2026 | $0 | $0 | $0 | $0 |
| Oct 2026 | $0 | $0 | $0 | $0 |
More than usual: $29.5M sold, after almost none in the past 5 years. 3 insiders sold; the average is 2 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 16, 2026 Latest 12 months | 2.23M | 3 | $29.5M |
| Oct 16, 2025 1 year earlier | 37K | 1 | $500K |
| Oct 16, 2024 2 years earlier | 19K | 1 | $275K |
| Oct 17, 2023 3 years earlier | 105K | 2 | $1.6M |
| Oct 17, 2022 4 years earlier | 100K | 2 | $1.2M |
| Oct 17, 2021 5 years earlier | 108K | 3 | $1.1M |
Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.
Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Black Stone Minerals, L.P. are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 654 Forms 3, 4 and 5 on record for Black Stone Minerals, L.P. (SEC CIK 1621434), filed from Apr 30, 2015 to Oct 5, 2026; 60 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".
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