Black Stone Minerals, L.P.
Black Stone Minerals, L.P. (BSM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BSM · as of Mar 31, 2025
Ownership Breakdown
182
Institutional Holders
▼ 5 vs Q4
$514.65M
Total Inst. Value
▲ $27.78M vs Q4
212.50M
Shares Outstanding
freeFloat 80.35%
33.73M
13F Shares Held
▲ 421,367 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BSM largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
WILLIAM MARSH RICE UNIVERSITY crude petroleum & natural gas | 5.66M | 2.68% | 2.68% | $86.48B | Apr 15, 2025 | — held |
MORGAN STANLEY crude petroleum & natural gas | 4.11M | 1.94% | 1.94% | $62.73B | May 15, 2025 | ▼ 1.43M |
BANK OF AMERICA CORP /DE/ crude petroleum & natural gas | 2.53M | 1.20% | 1.20% | $38.58B | May 15, 2025 | ▲ 579.1K |
PENN DAVIS MCFARLAND INC crude petroleum & natural gas | 1.86M | 88.13% | 88.13% | $28.43B | Apr 23, 2025 | ▲ 260.6K |
INVESTMENT MANAGEMENT ASSOCIATES INC /ADV crude petroleum & natural gas | 1.54M | 72.68% | 72.68% | $23.44B | Apr 30, 2025 | ▼ 8.8K |
NATIXIS crude petroleum & natural gas | 1.48M | 69.95% | 69.95% | $22.53B | Jul 18, 2025 | — held |
UBS GROUP AG crude petroleum & natural gas | 970.5K | 45.94% | 45.94% | $14.82B | May 13, 2025 | ▲ 314.2K |
MIRAE ASSET GLOBAL ETFS HOLDINGS LTD. crude petroleum & natural gas | 913.5K | 43.24% | 43.24% | $13.95B | May 15, 2025 | ▲ 885.3K |
BROWN ADVISORY INC crude petroleum & natural gas | 896.9K | 42.46% | 42.46% | $13.70B | Apr 30, 2025 | ▼ 1.0K |
MUDITA ADVISORS LLP crude petroleum & natural gas | 760.9K | 36.02% | 36.02% | $11.62B | May 19, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
19
Increased
+3.19M shares1
New Positions
first time holders16
Decreased
−2.12M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.07M
+3.19M / −2.12M
Net new holders
+4
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BSM insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
12
Buy transactions
3
Sell transactions
4.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
DeWalch D Mark director | Jun 1, 2026 | Purchase | 36,363 | $13.62 | $495.3K | 631.2K | Form 4 ↗ |
DeWalch D Mark director | May 29, 2026 | Purchase | 36,363 | $13.48 | $490.0K | 594.9K | Form 4 ↗ |
DeWalch D Mark director | May 28, 2026 | Purchase | 37,650 | $13.21 | $497.3K | 431.5K | Form 4 ↗ |
Carter Thomas L Jr Executive Chairman | May 13, 2026 | Purchase | 1,120 | $13.50 | $15.1K | 3.68M | Form 4 ↗ |
Longmaid Ashley J director | May 12, 2026 | Sale | 11,128 | $13.45 | $149.7K | 137.3K | Form 4 ↗ |
Carter Thomas L Jr Executive Chairman | May 12, 2026 | Purchase | 19,154 | $13.48 | $258.1K | 3.68M | Form 4 ↗ |
Carter Thomas L Jr Executive Chairman | May 11, 2026 | Purchase | 25,000 | $13.47 | $336.9K | 3.66M | Form 4 ↗ |
Carter Thomas L Jr Executive Chairman | May 8, 2026 | Purchase | 23,604 | $13.32 | $314.4K | 3.64M | Form 4 ↗ |
Putman Luke Stevens SVP, General Counsel, and Sec | May 5, 2026 | Sale | 29,386 | $13.75 | $404.0K | 702.6K | Form 4 ↗ |
Putman Luke Stevens SVP, General Counsel, and Sec | Apr 6, 2026 | Sale | 29,386 | $14.45 | $424.7K | 732.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Black Stone Minerals, L.P. (BSM) is primarily owned by institutional investors, who hold approximately 15.9% of total shares outstanding. Company insiders own approximately 19.65%, while retail and public investors account for the remaining 64.47%.
The largest institutional shareholder of Black Stone Minerals, L.P. is WILLIAM MARSH RICE UNIVERSITY, holding approximately 5.66 million shares — equal to 2.68% of outstanding shares — as of March 31, 2025.
A total of 182 institutional investors currently hold BSM stock, with a combined institutional value of approximately $514,650,924 as of the most recent 13F filing period.
Frequently asked questions
BSM ownershipBlack Stone Minerals, L.P. (BSM) is primarily owned by institutional investors, who hold approximately 15.9% of shares. The largest shareholder is WILLIAM MARSH RICE UNIVERSITY with a 2.68% stake. Company insiders hold 19.65%. Data sourced from SEC Form 13F as of March 31, 2025.