Form 4 Filing for Stuart Alexander D.

Stuart Alexander D., a director at Black Stone Minerals, L.P. (BSM), acquired 1,658 common units on October 2, 2026. This acquisition was made in lieu of a cash retainer for his services on the Board of Directors, as per a previous arrangement. The transaction code 'A' indicates an acquisition, and the price per share was $14.32. Following this transaction, the total number of shares owned by Stuart Alexander D. is 2,041,733. The filing also details various holdings under different trusts and entities, including RDS Investments, L.P. and Topsfield Energy Ltd., all of which are indirectly owned.