Form 4 Filing for Black Stone Minerals, L.P.

Anne Lenoir Hamman, a director of Black Stone Minerals, L.P., acquired 473 common units on April 2, 2026, in lieu of a cash retainer for her services. The transaction, valued at $15.12 per unit, brings her total post-transaction shares to 7,086. This acquisition is part of a previous arrangement where the reporting person elected to receive common units instead of cash. Ms. Hamman disclaims beneficial ownership of these securities except to the extent of her pecuniary interest. Following this transaction, her total holdings in common units, held indirectly through a family limited partnership, amount to 502,703 units.