Company: BSM
Filing Date: 2025-04-30
Form Type: DEF 14A
Source: 0001193125-25-107202
Chunk: 5

Company: Black Stone Minerals, L.P.
Filing Date: 2025-04-30
Form: DEF 14A
Chunk 5
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 in the pre-addressed envelope. If you wish to cumulate your votes, you must vote by using the proxy card rather than voting by telephone or the Internet. |

| • |     | During the Annual Meeting. You may vote your units during the Annual Meeting, virtually via the Internet. Please read “— Attending the Annual Meeting.” |

If you submit an executed proxy but do not give voting instructions as to how your units should be voted on a particular proposal at the Annual Meeting, your units will be voted in accordance with the recommendation of the Board as stated in this Proxy Statement. If you are a registered holder and you do not submit a proxy or vote virtually during the Annual Meeting, your units will not be voted on the proposals or counted for the purpose of establishing a quorum at the Annual Meeting. If you receive more than one Notice of Internet Availability of Proxy Materials, it is because your units are registered in more than one name or are registered in different accounts. Please follow the instructions on each Notice of Internet Availability of Proxy Materials received to ensure that all your units are voted. Beneficial Owners If you hold units in an account with a brokerage firm, bank, or other nominee, then you are a beneficial owner with respect to these units and hold such units in “street name.” If you are a beneficial owner of units on the Record Date, the brokerage firm, bank, or other nominee (the “intermediary”) will provide instructions detailing how to direct the voting of your units through the intermediary. The intermediary that holds your units is considered the holder of record for purposes of voting at the Annual Meeting. Internet and/or telephone voting is also generally offered to unitholders holding units in street name, but you must follow the instructions provided by the intermediary. As a beneficial owner, you are also invited to attend the Annual Meeting virtually. However, since you are not the holder of record, you may not vote your units during the Annual Meeting unless you follow your intermediary’s procedures for obtaining a legal proxy. 3

After obtaining a valid legal proxy from your intermediary, to then register to vote at the Annual Meeting virtually, you must submit proof of your legal proxy reflecting the number of your units along with your name and email address to Equiniti. Requests for registration should be directed to proxy@equiniti.com or to facsimile number 718-765-8730. Written requests can be mailed to:

<div align='center'>Equiniti Trust Company LLC

Attn: Proxy Tabulation Department

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