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

SecurityBSM / Black Stone Minerals, L.P. - Limited Partnership
InstitutionMraz, Amerine & Associates, Inc.
Latest Disclosed Ownership133,651 shares
Latest Disclosed Value $ 2,020,803
Mraz, Amerine & Associates, Inc. ownership in BSM / Black Stone Minerals, L.P. - Limited Partnership

On May 5, 2026 - Mraz, Amerine & Associates, Inc. filed a 13F-HR form disclosing ownership of 133,651 shares of Black Stone Minerals, L.P. - Limited Partnership (US:BSM) valued at $2,020,803 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 133,651 shares of Black Stone Minerals, L.P. - Limited Partnership. This represents a change in shares of 0.00% during the quarter. The current value of the position is $1,856,412 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)
2026-05-05 2026-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 133,651 0 0.00 2,021 13.74 0.2979
2026-02-06 2025-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 133,651 -1,043 -0.77 1,776 0.40 0.2639
2025-11-06 2025-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 134,694 2,096 1.58 1,770 2.02 0.2757
2025-07-23 2025-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 132,598 9,338 7.58 1,734 -7.62 0.2782
2025-07-24 2025-03-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 123,260 -145 -0.12 1,877 4.22 0.3226
2025-04-30 2025-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 123,260 -145 1,877 0.3226
2025-07-24 2024-12-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 123,405 -1,882 -1.50 1,802 -4.76 0.3210
2025-01-31 2024-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 123,405 -1,882 1,802 0.3210
2025-07-24 2024-09-30 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 125,287 -558 -0.44 1,892 -4.06 0.3421
2024-10-23 2024-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 125,287 -558 1,892 0.3421
2025-07-24 2024-06-30 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 125,845 -4,973 -3.80 1,972 -5.69 0.4052
2024-08-01 2024-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 125,845 -4,973 1,972 0.4052
2025-07-24 2024-03-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 130,818 -2,325 -1.75 2,090 -1.60 0.3951
2024-05-15 2024-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 130,818 -2,325 2,090 0.3951
2025-07-24 2023-12-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 133,143 -121 -0.09 2,125 -7.49 0.4451
2024-01-31 2023-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 133,143 -121 2,125 0.4451
2025-07-24 2023-09-30 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 133,264 -955 -0.71 2,296 7.29 0.5174
2023-11-13 2023-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 133,264 -955 2,296 0.5174
2025-07-24 2023-06-30 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 134,219 -428 -0.32 2,141 1.33 0.5030
2023-07-25 2023-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 134,219 -428 2,141 0.5030
2025-07-24 2023-03-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 134,647 1,892 1.43 2,113 -5.67 0.5198
2023-04-20 2023-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 134,647 1,892 2,113 0.5198
2023-01-12 2022-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 132,755 -966 -0.72 2,240 6.98 0.5277
2022-10-25 2022-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 133,721 87 0.07 2,093 14.43 0.5620
2022-07-27 2022-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 133,634 727 0.55 1,829 2.24 0.4699
2022-04-22 2022-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 132,907 6,992 5.55 1,789 37.51 0.4254
2022-01-14 2021-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 125,915 24,024 23.58 1,301 5.94 0.3342
2021-11-08 2021-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 101,891 75,348 283.87 1,228 330.88 0.3355
2021-08-03 2021-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 26,543 11,343 74.62 285 114.29 0.0773
2021-04-26 2021-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 15,200 0 0.00 133 30.39 0.0387
2021-02-11 2020-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 15,200 0 0.00 102 9.68 0.0339
2020-11-03 2020-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 15,200 -2,000 -11.63 93 -16.96 0.0346
2020-07-29 2020-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 17,200 0 0.00 112 40.00 0.0416
2020-05-06 2020-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 17,200 2,000 13.16 80 -58.55 0.0314
2020-02-10 2019-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 15,200 15,200 193 0.0551
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.