STOCK TITAN

Executive chair of Black Stone Minerals (BSM) adds 1,120 common units

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

Rhea-AI Filing Summary

Black Stone Minerals, L.P. executive chairman and director Carter Thomas L Jr reported an open-market purchase of common units representing limited partner interests. He bought 1,120 common units at a weighted average price between $13.49 and $13.50 per unit. After this purchase, his direct ownership increased to 3,682,724 common units, with additional indirect holdings reported through various family-related entities and trusts.

Positive

  • None.

Negative

  • None.
Insider Carter Thomas L Jr
Role Executive Chairman
Bought 1,120 shs ($15K)
Type Security Shares Price Value
Purchase Common units representing limited partner interests 1,120 $13.4999 $15K
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 — 3,682,724 shares (Direct, null); Common units representing limited partner interests — 13,141 shares (Indirect, By Fowler Thomas Carter 1995 Trust)
Footnotes (1)
  1. [object Object]
Units purchased 1,120 common units Open-market purchase on 2026-05-13
Weighted average price $13.4999 per unit Open-market purchase price
Price range $13.49–$13.50 per unit Range of individual trade prices
Direct holdings after transaction 3,682,724 common units Direct ownership following purchase
Indirect holdings via Carter2221, Ltd. 11,481,503 common units Indirect ownership reported
Indirect holdings via spouse 167,155 common units Spouse-held units reported as indirect
open-market purchase financial
"transaction_action: "open-market purchase""
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
limited partner interests financial
"Common units representing limited partner interests"
An investor's ownership stake in a limited partnership that gives them rights to a share of profits and losses but not day-to-day control over the business, similar to being a silent partner in a project. For investors this matters because it defines how they earn returns, how much risk and liability they carry, and how easy it is to sell their position — all key factors when valuing and comparing investments.
indirect ownership financial
"direct_or_indirect: "I", nature_of_ownership: "By Carter2221, Ltd.""
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*
Carter Thomas L Jr

(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
XOfficer (give title below)Other (specify below)
Executive Chairman
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026
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 interests05/13/2026P1,120A$13.4999(1)3,682,724D
Common units representing limited partner interests13,141IBy Fowler Thomas Carter 1995 Trust
Common units representing limited partner interests37,741IBy Georgia Elizabeth Carter 1995 Trust
Common units representing limited partner interests167,155IBy spouse
Common units representing limited partner interests37,742IBy Molly Leachman Carter 1995 Trust
Common units representing limited partner interests37,741IBy Katherine Ross Carter 1995 Trust
Common units representing limited partner interests11,481,503IBy Carter2221, 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. The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $13.49 to $13.50, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.
Remarks:
/s/ Steve Putman, attorney-in-fact for Thomas L. Carter, Jr.05/14/2026
** 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 Carter Thomas L Jr report for Black Stone Minerals (BSM)?

Carter Thomas L Jr reported an open-market purchase of Black Stone Minerals common units. He acquired 1,120 common units representing limited partner interests, adding to his existing holdings and reflecting a direct investment in the partnership’s equity.

How many Black Stone Minerals (BSM) units did the executive chairman buy and at what price?

He bought 1,120 common units of Black Stone Minerals. The filing shows a weighted average purchase price between $13.49 and $13.50 per unit, based on multiple trades executed within that narrow price range on the same date.

What are Carter Thomas L Jr’s direct holdings in Black Stone Minerals (BSM) after this Form 4?

After the reported purchase, his direct holdings total 3,682,724 common units. This figure reflects only units held in his own name, separate from additional indirect interests held through family-related entities and trusts disclosed in the same filing.

What indirect ownership interests in Black Stone Minerals (BSM) does the Form 4 disclose?

The Form 4 lists several indirect holdings for Carter Thomas L Jr. These include units held by Carter2221, Ltd., his spouse, and multiple 1995 trusts, each shown with its own total common units following the reported date, indicating substantial family-related ownership.

How was the purchase price for the Black Stone Minerals (BSM) units calculated in the filing?

The filing states the reported price is a weighted average. The 1,120 common units were bought through multiple transactions, with individual trade prices ranging from $13.49 to $13.50 per unit, producing the weighted average listed in the transaction details.