Company: BSM
Filing Date: 2025-04-30
Form Type: DEF 14A
Source: 0001193125-25-107202
Chunk: 103

Company: Black Stone Minerals, L.P.
Filing Date: 2025-04-30
Form: DEF 14A
Chunk 103
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 must vote by using the proxy card rather than voting by telephone or the Internet. |

| Signature of Unitholder |     | Date: |     | Signature of Unitholder |     | Date: |

| Note: |     | Please sign exactly as your name or names appear on this Proxy. When units are held jointly, each holder should sign. When signing as executor, administrator, attorney, trustee or guardian, please give full title as such. If the signer is a corporation, please sign full corporate name by duly authorized officer, giving full title as such. If signer is a partnership, please sign in partnership name by authorized person. |

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BLACK STONE MINERALS, L.P. Proxy for Annual Meeting of Limited Partners on June 12, 2025 Solicited on Behalf of the Board of Directors The undersigned hereby appoints Thomas L. Carter, Jr. and L. Steve Putman, and each of them, with full power of substitution and power to act alone, as proxies to vote all the units which the undersigned would be entitled to vote if personally present and acting at the Annual Meeting of Limited Partners of Black Stone Minerals, L.P., to be held on June 12, 2025 at 12:00 p.m., Central Time, via live webcast at https://web.lumiconnect.com/255252993 (password: bsmvirt25), and at any adjournments or postponements thereof, as follows: (Continued and to be signed on the reverse side.)

| 1.1 |     | 14475 |