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BSM

Black Stone Minerals (BSM) stock: insider trades, news & valuation

Net selling
Close · Oct 9, 2026 $14.81 +0.4% on the day +22.8% over 12 months 52-week range $11.38 – $15.17

Share price and insider trades

BSM closeInsider buyInsider sale
10121416NovDecJan 2026FebMarAprMayJunJulAugSepOctBought $15,120 on 2026-05-13 · Thomas L Carter Jr.Sold $149,672 on 2026-05-12 · Ashley J LongmaidBought $258,196 on 2026-05-12 · Thomas L Carter Jr.Bought $314,405 on 2026-05-08 · Thomas L Carter Jr.Bought $336,750 on 2026-05-11 · Thomas L Carter Jr.Sold $404,058 on 2026-05-05 · Luke Stevens PutmanBought $490,173 on 2026-05-29 · D Mark DewalchBought $495,264 on 2026-06-01 · D Mark DewalchBought $497,356 on 2026-05-28 · D Mark DewalchSold $849,255 on 2026-04-06 · Luke Stevens PutmanSold $923,418 on 2026-03-05 · Luke Stevens PutmanSold $28,099,057 on 2026-08-06 · James Whitehead
Bought, 12 months$2.4M
Sold, 12 months$30.4M
Insiders buying2
Insiders selling3

Black Stone Minerals insider trading at a glance (Oct 9, 2026): in the past 12 months, 2 insiders bought $2.4M and 3 sold $30.4M of BSM stock on the open market.

BSM insider buying and selling by quarter

Open-market purchases (green, above the line) and sales (red, below), by trade date.

Q1 2026: $923K sold (2 trades)Q1 2026Q2 2026: $2.4M bought (7 trades)$2.4MQ2 2026: $1.4M sold (4 trades)Q2 2026Q3 2026: $28.1M sold (2 trades)Q3 2026Q4 2026
QuarterBoughtPurchasesSoldSales
Q4 2026—0—0
Q3 2026—0$28.1M2
Q2 2026$2.4M7$1.4M4
Q1 2026—0$923K2

Valuation, profit and volume

P/E (trailing)n/aSector median —
Market value— 
Profit margin—Revenue growth —
Volume vs. 50-day0.5×Last 5 sessions
Insiders' paper profit+$247KOn all tracked purchases +10.3%

Summary

Over the past 12 months, 2 Black Stone Minerals, L.P. insiders reported open-market purchases totaling $2.4M, while 3 insiders reported sales totaling $30.4M. Among insiders with enough purchase history to measure, D Mark Dewalch (Director) has the highest Insider Score at 68. 4 of 8 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.

Insider transactions

Open-market purchases and sales.

Filed Insider Type Shares Price Value Since Score
Aug 10SEC James WhiteheadDirector Sell 1,628,762646,058 held (−72%) $13.21 $21.5M +12.1% —
Aug 10SEC James WhiteheadDirector Sell 498,343 $13.21 $6.6M +12.1% —
Jun 2SEC D Mark DewalchDirector Buy 36,363631,248 held (+6%) $13.62 $495K +8.7% 68
Jun 2SEC D Mark DewalchDirector Buy 36,363594,885 held (+7%) $13.48 $490K +9.9% 68
May 28SEC D Mark DewalchDirector Buy 37,650431,495 held (+10%) $13.21 $497K +12.1% 68
May 14SEC Thomas L Carter Jr.Chair Buy 1,1203,682,724 held (+0%) $13.50 $15K +9.7% 56
May 13SEC Ashley J LongmaidDirector Sell 11,128137,335 held (−7%) $13.45 $150K +10.1% —
May 12SEC Thomas L Carter Jr.Chair Buy 25,0003,662,450 held (+1%) $13.47 $337K +9.9% 56
May 12SEC Thomas L Carter Jr.Chair Buy 23,6043,637,450 held (+1%) $13.32 $314K +11.2% 56
May 12SEC Thomas L Carter Jr.Chair Buy 19,1543,681,604 held (+1%) $13.48 $258K +9.9% 56
May 6SEC Luke Stevens PutmanGeneral Counsel Sell Plan 30,276761,417 held (−4%) $15.25 $462K -2.9% —
May 6SEC Luke Stevens PutmanGeneral Counsel Sell Plan 29,386732,031 held (−4%) $14.45 $425K +2.5% —
May 6SEC Luke Stevens PutmanGeneral Counsel Sell Plan 29,386702,645 held (−4%) $13.75 $404K +7.7% —
Apr 7SEC Luke Stevens PutmanGeneral Counsel Sell 29,386732,031 held (−4%) $14.45 $425K +2.5% —
Mar 6SEC Luke Stevens PutmanGeneral Counsel Sell Plan 30,276761,417 held (−4%) $15.25 $462K -2.9% —

Insiders at Black Stone Minerals, L.P.

InsiderBoughtSoldLast filingScore
James WhiteheadDirector — $28.1M Aug 10, 2026 —
D Mark DewalchDirector $1.5M — Jun 2, 2026 68
Thomas L Carter Jr.Chair $924K — May 14, 2026 56
Luke Stevens PutmanGeneral Counsel — $2.2M May 6, 2026 —
Ashley J LongmaidDirector — $150K May 13, 2026 —

BSM stock: common questions

Are Black Stone Minerals, L.P. insiders buying BSM stock?

In the past 12 months, 2 insiders reported open-market purchases of BSM worth $2.4M. The latest was Director D Mark Dewalch bought $495K of BSM at $13.62.

Are Black Stone Minerals, L.P. insiders selling BSM stock?

3 insiders reported sales worth $30.4M over the same period.

Where does this data come from?

Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.

What is BSM's 52-week range?

Over the past year BSM has traded between $11.38 and $15.17. It last closed at $14.81 on Oct 9, 2026.