Black Stone Minerals: $338K share sale proposed

The notice names Morgan Stanley Smith Barney LLC as broker and gives November 9, 2026 as the approximate sale date.

Available on EDGAR 11/09/2026 - 04:26 PM EST Accepted by SEC EDGAR 11/09/2026 - 04:26 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Black Stone Minerals, L.P. (BSM) is the issuer named in a notice of a proposed sale of 25,152 common shares for the account of R. Lacy Services, Ltd. Ret. Plan, with an aggregate market value of $337,557.45. The proposed sale date is approximately November 9, 2026. The notice lists “Director” as the relationship to the issuer and is signed by James Walter Whitehead. It lists the shares as acquired from the issuer in private transactions for cash: 14,263 on May 24, 2019 and 10,889 on May 6, 2015.

Key Figures

Common shares proposed for sale: 25,152 shares Aggregate market value: $337,557.45 Common shares outstanding: 212,861,806 shares +2 more

5 metrics

Common shares proposed for sale 25,152 shares Proposed sale for the account of R. Lacy Services, Ltd. Ret. Plan

Aggregate market value $337,557.45 Proposed sale

Common shares outstanding 212,861,806 shares Number reported in the securities information

Shares acquired 14,263 shares May 24, 2019; private acquisition from the issuer for cash

Shares acquired 10,889 shares May 6, 2015; private acquisition from the issuer for cash

Key Terms

Aggregate Market Value, Number of Shares or Other Units Outstanding, Private Acquisition from Issuer/Affiliate, Approximate Date of Sale

4 terms

Aggregate Market Value financial

"Aggregate Market Value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Number of Shares or Other Units Outstanding financial

"Number of Shares or Other Units Outstanding"

Private Acquisition from Issuer/Affiliate financial

"Private Acquisition from Issuer/Affiliate"

Approximate Date of Sale financial

"Approximate Date of Sale"

FAQ

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How many BSM shares are proposed for sale, and what is their stated value?

R. Lacy Services, Ltd. Ret. Plan is listed for a proposed sale of 25,152 BSM common shares, with an aggregate market value of $337,557.45. The approximate sale date is November 9, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001987724
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	BLACK STONE MINERALS, L.P.
SEC File Number	001-37362
Address of Issuer	1001 FANNIN STREET, SUITE 2020 HOUSTON TEXAS 77022
Phone	(713)658-0647
Name of Person for Whose Account the Securities are To Be Sold	R. LACY SERVICES, LTD. RET. PLAN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	25152	337557.45	212861806	11/09/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/24/2019	Private Acquisition from Issuer/Affiliate	Issuer			14263	05/24/2019	Cash
Common	05/06/2015	Private Acquisition from Issuer/Affiliate	Issuer			10889	05/06/2015	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	11/09/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ James Walter Whitehead
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)