Black Stone Minerals: $8.67M share sale proposed

The shares are associated with a private cash acquisition from the issuer dated May 24, 2019.

Available on EDGAR 11/09/2026 - 04:25 PM EST Accepted by SEC EDGAR 11/09/2026 - 04:25 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Black Stone Minerals, L.P. (BSM) lists 646,058 common shares to be sold for Lacy Properties, Ltd., which is listed with the issuer relationship “Director.” The approximate sale date is November 9, 2026. The notice gives an aggregate market value of $8,670,550.60 and reports 212,861,806 common shares outstanding. Morgan Stanley Smith Barney LLC is named as broker. The shares were acquired from the issuer in a private acquisition on May 24, 2019, with cash payment. The notice is signed by James Walter Whitehead.

Key Figures

Common shares to be sold: 646,058 shares Aggregate Market Value: $8,670,550.60 Common shares outstanding: 212,861,806 shares +2 more

5 metrics

Common shares to be sold 646,058 shares Listed for sale by Lacy Properties, Ltd.

Aggregate Market Value $8,670,550.60 For the securities to be sold

Common shares outstanding 212,861,806 shares Reported in the securities information

Approximate sale date November 9, 2026 Proposed sale

Acquisition date May 24, 2019 Private acquisition from the issuer; payment was cash

Key Terms

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

3 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.

Private Acquisition from Issuer/Affiliate financial

"Nature of Acquisition Transaction: Private Acquisition from Issuer/Affiliate"

Number of Shares or Other Units Outstanding financial

"Number of Shares or Other Units Outstanding"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many BSM shares does Lacy Properties, Ltd. propose to sell?

Lacy Properties, Ltd. lists 646,058 common shares to be sold. The approximate sale date is November 9, 2026.

When is the proposed BSM share sale and which broker is named?

The approximate sale date is November 9, 2026, and Morgan Stanley Smith Barney LLC is named as broker.

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	LACY PROPERTIES, LTD.
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	646058	8670550.60	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			646058	05/24/2019	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)