Company: BSM
Filing Date: 2025-04-30
Form Type: DEF 14A
Source: 0001193125-25-107202
Chunk: 1

Company: Black Stone Minerals, L.P.
Filing Date: 2025-04-30
Form: DEF 14A
Chunk 1
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 transact such other business as may properly come before the Annual Meeting or any postponements or adjournments thereof. |

You may attend the Annual Meeting via the Internet at https://web.lumiconnect.com/255252993. Because the Annual Meeting is completely virtual and being conducted via the Internet, you will not be able to attend the meeting in person. The Board has fixed the close of business on April 14, 2025 as the record date for the Annual Meeting. Holders of record of the Partnership’s common units and preferred units as of the close of business on such date are entitled to notice of, and to vote at, the Annual Meeting. Pursuant to the rules adopted by the Securities and Exchange Commission (“SEC”), the Partnership is providing access to its proxy materials primarily via the Internet, rather than mailing paper copies of these materials to each unitholder. On or about April 30, 2025, the Partnership began mailing a Notice of Internet Availability of Proxy Materials to its unitholders of record detailing how to access the proxy materials electronically and how to submit a proxy by telephone, Internet, or mail or vote during the Annual Meeting. The Notice of Internet Availability of Proxy Materials also provides instructions on how to request and obtain paper copies of the proxy materials. If your units are held in street name, you will receive instructions from the holder of record detailing how to direct the voting of your units. Internet and/or telephone voting will also be offered to unitholders holding units in street name.

The Partnership urges you to review the proxy materials carefully and to submit your proxy or voting instructions as soon as possible so that your units will be represented at the Annual Meeting.

| By Order of the Board,                                                                   |
| /s/ Steve Putman                                                                         |
| Steve Putman                                                                             |
| Senior Vice President, General Counsel, and Secretary of Black Stone Minerals GP, L.L.C. |

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF LIMITED PARTNERS TO BE HELD ON JUNE 12, 2025 The Notice of Annual Meeting, the Proxy Statement, a form of proxy card, and the Partnership’s Annual Report on Form 10-Kfor the year ended December 31, 2024 are available at http://www.astproxyportal.com/ast/20065

Black Stone Minerals, L.P. 1001 Fannin Street Suite 2020 Houston, Texas 77002 PROXY STATEMENT FOR ANNUAL MEETING