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

Anne Lenoir Hamman, a director at Black Stone Minerals, L.P., acquired 1309 common units on October 2, 2026, valued at $14.32 per unit, as part of a previous arrangement where she elected to receive common units in lieu of a cash retainer for her services. Following this transaction, her total holdings in common units increased to 502,703, with the additional units now held through a family limited partnership. The filing, dated October 5, 2026, was signed by her representative, Steve Putman. It is noted that Ms. Hamman disclaims beneficial ownership of these securities except to the extent of her pecuniary interest.