FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Mathis William N.
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)
(Last)          (First)          (Middle)

1001 FANNIN STREET, SUITE 2020
3. Date of Earliest Transaction (MM/DD/YYYY)

10/1/2021
(Street)

HOUSTON, TX 77002
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 10/1/2021  A(1)  1498 A$12.05 169618 D  
Common units representing limited partner interests         178913 I By Conti Street Partners, L.P. 
Common units representing limited partner interests         842637 (2)I By WM Capital Partners, L.P. 
Common units representing limited partner interests         270073 I By Travis A. Mathis Special Trust 
Common units representing limited partner interests         295573 I By Travis Mathis 2012 Trust 
Common units representing limited partner interests         10437 I By Travis Mathis 2012 GSTE 
Common units representing limited partner interests         295574 I By William Mathis 2012 Trust 
Common units representing limited partner interests         10436 I By William Mathis 2012 GSTE 

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. 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 of Derivative Security: 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.
(2) Prior to the date of this report, a pro rata distribution of common units was made from WM Capital to one if its partners in a transaction exempt from reporting.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Mathis William N.
1001 FANNIN STREET, SUITE 2020
HOUSTON, TX 77002
X



Signatures
/s/ Steve Putman, attorney-in-fact for William N. Mathis10/5/2021
**Signature of Reporting PersonDate

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