STOCK TITAN

Black Stone Minerals (BSM) director takes units as board retainer compensation

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Stuart Alexander D. reported acquisition or exercise transactions in this Form 4 filing.

Black Stone Minerals, L.P. director Stuart Alexander D. received a grant of 1,570 common units representing limited partner interests on April 2, 2026 at $15.12 per unit. He elected units instead of a cash retainer for Board service and now holds 2,054,275 units directly, plus additional indirect holdings through various trusts and entities, including 2,112,711 units held by Topsfield Energy Ltd.

Positive

  • None.

Negative

  • None.
Insider Stuart Alexander D.
Role Director
Type Security Shares Price Value
Grant/Award Common units representing limited partner interests 1,570 $15.12 $24K
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
holding Common units representing limited partner interests -- -- --
Holdings After Transaction: Common units representing limited partner interests — 2,054,275 shares (Direct); Common units representing limited partner interests — 1,251,634 shares (Indirect, By RDS Investments, L.P.)
Footnotes (1)
  1. [object Object]
Units granted 1,570 common units Equity retainer grant on April 2, 2026
Grant price per unit $15.12 per unit Value used for the 1,570-unit award
Direct holdings after grant 2,054,275 units Common units directly owned following the transaction
Indirect holdings via Topsfield Energy Ltd. 2,112,711 units Common units held indirectly through Topsfield Energy Ltd.
Acquisition transactions 1 transaction coded A Grant, award, or other acquisition on Form 4
Holding entries 11 entries Indirect ownership holdings reported on the Form 4
Form 4 regulatory
"INSIDER FILING DATA (Form 4)"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
common units representing limited partner interests financial
"security_title: "Common units representing limited partner interests""
grant, award, or other acquisition financial
"transaction_code_description: "Grant, award, or other acquisition""
indirect ownership financial
"ownership_type: "indirect" with various trusts and entities"
Board of Directors regulatory
"cash retainer for service on the Board of Directors"
The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.
SEC Form 4
FORM 4UNITED 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
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
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*
Stuart Alexander D.

(Last)(First)(Middle)
1001 FANNIN STREET, SUITE 2020

(Street)
HOUSTON TEXAS 77002

(City)(State)(Zip)

UNITED STATES

(Country)
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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/02/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common units representing limited partner interests04/02/2026A1,570A(1)$15.122,054,275D
Common units representing limited partner interests1,251,634IBy RDS Investments, L.P.
Common units representing limited partner interests74,541IBy Alexander Douglas Stuart Primary Trust
Common units representing limited partner interests74,541IBy Marian Stuart Pillsbury Primary Trust
Common units representing limited partner interests159,901IBy UA R Douglas Stuart III Marital Trust
Common units representing limited partner interests74,541IBy Robert D. Stuart III Primary Trust
Common units representing limited partner interests74,541IBy James McClure Stuart Primary Trust
Common units representing limited partner interests239,333IBy Marian S. Pillsbury Family 2012 GST Trust
Common units representing limited partner interests286,976IBy Ann Peake Stuart 2011 Exempt Trust
Common units representing limited partner interests180,775IBy Robert D. Stuart, Jr. 1996 Marital Trust
Common units representing limited partner interests6,687IBy Barbara E Stuart GST Exempt Trust fbo Alexander D Stuart
Common units representing limited partner interests2,112,711IBy Topsfield Energy Ltd.
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Pursuant to a previous arrangement, the Reporting Person elected to receive common units in lieu of a cash retainer for service on the Board of Directors of the Partnership's General Partner.
Remarks:
/s/ Steve Putman, attorney-in-fact for Alexander D. Stuart04/06/2026
** Signature of Reporting PersonDate
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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did BSM director Stuart Alexander report on this Form 4?

BSM director Stuart Alexander reported receiving a grant of 1,570 common units representing limited partner interests. The units were received as compensation, reflecting his election to take equity instead of a cash retainer for serving on the Board of the Partnership’s general partner.

At what price were the Black Stone Minerals (BSM) units granted to the director?

The 1,570 common units were granted at a price of $15.12 per unit. This price is used to value the equity compensation award that the director received in lieu of a cash retainer for his Board service on the Partnership’s general partner.

How many Black Stone Minerals (BSM) units does the director hold directly after this grant?

Following the grant, the director directly holds 2,054,275 common units representing limited partner interests. This figure reflects his direct ownership position after adding the 1,570-unit compensation award he elected to receive instead of a cash retainer for Board service.

Is the BSM Form 4 transaction an open-market purchase or compensation grant?

The transaction is a compensation-related grant, not an open-market purchase. The Form 4 classifies it with code A, described as a grant, award, or other acquisition, and the footnote explains he elected to receive common units instead of a cash retainer for Board service.

What indirect ownership interests in Black Stone Minerals (BSM) are reported for the director?

The Form 4 lists multiple indirect holdings through entities such as RDS Investments, L.P., several family trusts, and Topsfield Energy Ltd. One example is 2,112,711 common units held indirectly through Topsfield Energy Ltd., reflecting additional ownership associated with the reporting person.

Does the BSM Form 4 indicate any insider sales or dispositions of units?

The Form 4 does not show any sales or dispositions. It reports one acquisition coded as a grant or award of 1,570 common units and several holding entries with indirect ownership, with transaction summary data showing no sell transactions or net buy-sell share changes.