Black Stone Minerals, L.P.

Except as described below, during the three months ended December 31, 2025, none of our directors or executive officers adopted orterminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K.

On December 4, 2025, Steve Putman, our Senior Vice President, General Counsel, and Secretary, adopted a trading arrangement for the sale of common units (a “Rule 10b5-1 Trading arrangement”) that is intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c). Mr. Putman’s Rule 10b5-1 Trading Plan provides for the sale of approximately 90,000 common units, subject to adjustment upon future settlement of certain outstanding unit-based awards and associated distribution equivalent rights, pursuant to the terms of the plan and will terminate on the earlier of (i)December 4, 2026, (ii) the first date on which all trades set forth in the plan have been executed or (iii) such date as the plan is otherwise terminated according to its terms.