Black Stone Minerals, L.P. - Limited Partnership
US ˙ NYSE ˙ US09225M1018

SecurityBSM / Black Stone Minerals, L.P. - Limited Partnership
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership21,769 shares
Latest Disclosed Value $ 329,140
Advisor Group Holdings, Inc. reports 4.70% decrease in ownership of BSM / Black Stone Minerals, L.P. - Limited Partnership

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 21,769 shares of Black Stone Minerals, L.P. - Limited Partnership (US:BSM) valued at $329,147 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 22,843 shares of Black Stone Minerals, L.P. - Limited Partnership. This represents a change in shares of -4.70% during the quarter. The current value of the position is $302,371 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 21,769 -1,074 -4.70 329 8.58 0.0003
2026-02-17 2025-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 22,843 -10,402 -31.29 304 -26.28 0.0004
2025-11-14 2025-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 33,245 -322 -0.96 412 -6.38 0.0006
2025-09-04 2025-06-30 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 33,567 -8,398 -20.01 439 -31.41 0.0008
2025-08-13 2025-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 40,406 -1,559 582 0.0007
2025-05-12 2025-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 41,965 5,694 15.70 641 20.98 0.0014
2025-06-06 2024-12-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 36,271 -13,375 -26.94 530 -29.37 0.0012
2025-02-07 2024-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 38,282 -11,364 578 0.0015
2024-11-13 2024-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 49,646 -1,399 -2.74 750 -6.26 0.0017
2024-08-13 2024-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 51,045 -33,737 -39.79 800 -40.99 0.0019
2024-05-10 2024-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 84,782 -68,766 -44.78 1,355 -44.73 0.0030
2024-02-12 2023-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 153,548 -50,047 -24.58 2,451 -30.16 0.0043
2023-11-13 2023-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 203,595 81,339 66.53 3,508 79.99 0.0052
2023-08-21 2023-06-30 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 122,256 31,725 35.04 1,950 37.25 0.0035
2023-08-10 2023-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 122,256 31,725 1,950 0.0005
2023-05-12 2023-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 90,531 18,566 25.80 1,420 17.07 0.0027
2023-02-10 2022-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 71,965 55,243 330.36 1,213 362.98 0.0025
2022-11-14 2022-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 16,722 5,174 44.80 262 64.78 0.0006
2022-08-10 2022-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 11,548 106 0.93 159 3.92 0.0004
2022-05-04 2022-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 11,442 -3,110 -21.37 153 2.00 0.0003
2022-02-03 2021-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 14,552 -585 -3.86 150 -18.03 0.0003
2021-11-05 2021-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 15,137 2,460 19.41 183 33.58 0.0004
2021-08-02 2021-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 12,677 -775 -5.76 137 17.09 0.0003
2021-05-13 2021-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 13,452 200 1.51 117 32.95 0.0003
2021-02-10 2020-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 13,252 3,835 40.72 88 49.15 0.0002
2020-11-12 2020-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 9,417 -3,362 -26.31 59 -28.92 0.0002
2020-08-14 2020-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 12,779 -346 -2.64 83 33.87 0.0003
2020-05-18 2020-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 13,125 13,125 62 0.0003
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.