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

SecurityBSM / Black Stone Minerals, L.P. - Limited Partnership
InstitutionNatixis
Latest Disclosed Ownership1,579,900 shares
Latest Disclosed Value $ 23,888,088
Natixis ownership in BSM / Black Stone Minerals, L.P. - Limited Partnership

On May 14, 2026 - Natixis filed a 13F-HR form disclosing ownership of 1,579,900 shares of Black Stone Minerals, L.P. - Limited Partnership (US:BSM) valued at $23,888,088 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,579,900 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 $21,992,208 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)
2026-05-14 2026-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,579,900 0 0.00 23,888 13.77 0.0773
2026-02-13 2025-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,579,900 122,900 8.44 20,997 9.67 0.0746
2025-11-14 2025-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,457,000 0 0.00 19,145 0.46 0.0888
2025-08-13 2025-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,457,000 -20,700 -1.40 19,058 -15.43 0.0845
2025-07-18 2025-03-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 1,477,700 0 0.00 22,535 4.45 0.1227
2025-05-14 2025-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,477,700 0 22,535 0.1236
2025-02-13 2024-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,477,700 0 0.00 21,574 -3.31 0.1318
2024-11-13 2024-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,477,700 -386,800 -20.75 22,313 -23.63 0.1258
2024-08-13 2024-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,864,500 0 0.00 29,217 -1.94 0.1672
2024-05-13 2024-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,864,500 0 0.00 29,795 0.12 0.1549
2024-02-13 2023-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,864,500 200,900 12.08 29,757 3.82 0.2162
2023-11-14 2023-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,663,600 896,700 116.93 28,664 134.33 0.2194
2023-08-11 2023-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 766,900 62,100 8.81 12,232 10.62 0.0993
2023-05-12 2023-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 704,800 -704,800 -50.00 11,058 -53.50 0.0997
2023-02-24 2022-12-31 13F/A-1 BLACK STONE MINERALS L P COM 09225M101 1,409,600 697,400 97.92 23,780 113.34 0.1334
2023-02-13 2022-12-31 13F Black Stone Minerals COM UNIT 09225M101 704,800 -7,400 11,890 0.0000
2022-11-14 2022-09-30 13F Black Stone Minerals COM UNIT 09225M101 712,200 22,500 3.26 11,146 18.05 0.0522
2022-08-12 2022-06-30 13F Black Stone Minerals COM UNIT 09225M101 689,700 -403,200 -36.89 9,442 -35.81 0.0342
2022-05-13 2022-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,092,900 0 0.00 14,710 30.29 0.0513
2022-02-14 2021-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,092,900 90,000 8.97 11,290 -6.58 0.0385
2021-11-12 2021-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,002,900 0 0.00 12,085 12.10 0.0418
2021-08-13 2021-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 1,002,900 0 0.00 10,781 23.28 0.0471
2021-05-14 2021-03-31 13F BLACK STONE MINERALS L P COM UNI 09225M101 1,002,900 1,002,900 8,745 0.0286
2020-08-13 2020-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 0 -109,600 -100.00 0 -100.00
2020-05-14 2020-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 109,600 52,200 90.94 513 -30.11 0.0040
2020-02-14 2019-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 57,400 -402,900 -87.53 734 -88.80 0.0045
2019-11-13 2019-09-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 460,300 402,900 701.92 6,555 636.52 0.0422
2019-08-13 2019-06-30 13F BLACK STONE MINERALS L P COM UNIT 09225M101 57,400 0 0.00 890 -11.62 0.0070
2019-05-15 2019-03-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 57,400 46,400 421.82 1,007 492.35 0.0063
2019-02-14 2018-12-31 13F/A-1 BLACK STONE MINERALS L P COM UNIT 09225M101 11,000 11,000 170 0.0014
2019-02-14 2018-12-31 13F BLACK STONE MINERALS L P COM UNIT 09225M101 11,000 170 0.0014
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.