Black Stone Minerals enters voting and standstill agreement with preferred unitholder AP Basileia

Black Stone Minerals, L.P.

AP Basileia holds 14.7M preferred units; agrees to vote with Board on ordinary matters, standstill until Nov 2027.
BSM agrees not to redeem preferred units during same period (through Nov 27, 2027).
Standstill caps AP Basileia ownership at below 11% of common units on an as-converted basis.
Transfers of preferred units require transferee to be bound by agreement, with exceptions for open-market sales of acquired common.

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