Black Stone (NYSE: BSM) director granted 14,255 common units

Rhea-AI Filing Summary

Black Stone Minerals director Ashley J. Longmaid reported an equity award. On 01/13/2026, Longmaid acquired 14,255 common units representing limited partner interests at a price of $0 per unit. After this grant, Longmaid directly beneficially owned 148,463 common units. This filing reflects a change in insider holdings rather than company operating performance.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Longmaid Ashley J

(Last) (First) (Middle)

1001 FANNIN ST., SUITE 2020

(Street)

HOUSTON TX 77002

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Black Stone Minerals, L.P. [ BSM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/13/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common units representing limited partner interests	01/13/2026		A		14,255	A	$0	148,463	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Steve Putman, attorney-in-fact for Ashley J. Longmaid	01/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transaction did BSM report for Ashley J. Longmaid?

The Form 4 reports that director Ashley J. Longmaid acquired 14,255 common units of Black Stone Minerals, L.P. on 01/13/2026.

At what price were the Black Stone Minerals (BSM) units acquired?

The 14,255 common units were acquired at a reported price of $0 per unit, indicating a grant or award rather than an open-market purchase.

How many Black Stone Minerals units does Ashley J. Longmaid own after this transaction?

Following the reported transaction, Ashley J. Longmaid directly beneficially owned 148,463 common units of Black Stone Minerals, L.P.

What is Ashley J. Longmaid’s relationship to Black Stone Minerals?

Ashley J. Longmaid is reported as a director of Black Stone Minerals, L.P. and is not listed as an officer or 10% owner in this filing.

Was this BSM insider transaction reported as direct or indirect ownership?

The Form 4 lists the ownership form for the reported holdings as Direct (D), with no separate indirect ownership entity noted.

Does the Form 4 indicate any derivative securities for Ashley J. Longmaid at BSM?

Table II for derivative securities is present but shows no derivative securities transactions or holdings reported for this Form 4.