X0306 4 2015-12-11 0001621434 Black Stone Minerals, L.P. BSM 0001639921 Stuart Alexander D. 1001 FANNIN STREET, SUITE 2020 HOUSTON TX 77002 true false false false Preferred units representing limited partner interests 2015-12-11 4 D false 1500 1019.45 D Common and subordinated unitsrepresenting LP interests 0 D Preferred units representing limited partner interests 2015-12-11 4 D false 1125 1019.45 D Common and subordinated units representing LP interests 0 I By North Star Oil & Gas Preferred units representing limited partner interests 2015-12-11 4 D false 750 1019.45 D Common and subordinated units representing LP interests 0 I By Topsfield Energy Company Preferred units representing limited partner interests 2015-12-11 4 D false 1125 1019.45 D Common and subordinated units representing LP interests 0 I By RDS Investments, L.P. Preferred units representing limited partner interests 2015-12-11 4 D false 1500 1019.45 D Common and subordinated units representing LP interests 0 I By R D Stuart Jr 1996 Trust Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, on January 1 of each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate, as described in the Issuer's Registration Statement on Form S-1, as amended (File No. 333-202875). Disposed of pursuant to the Issuer's offer to purchase up to 100% of the 117,963 outstanding Series A Preferred Units from its preferred unitholders at the units' par value of $1,000.00 per preferred unit, plus unpaid accrued yield. Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, on January 1 of each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875). /s/Steve Putman, Attorney-in-Fact for Alexander D.Stuart 2015-12-15