D. Mark DeWalch Acquires Black Stone Minerals Units

D. Mark DeWalch, a director at Black Stone Minerals, L.P., acquired 1,309 common units representing limited partner interests 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, valued at $14.32 per unit, brings his post-transaction direct ownership to 434,146 units. Following this transaction, his total indirect ownership, held through various trusts and entities, includes 631,248 units held by DeWalch Diversified LP, 40,809 units by the Donald Mark DeWalch Trust, and 6,749 units held by his wife.