D. Mark DeWalch - 02 Jul 2026 Form 4 Insider Report for Black Stone Minerals, L.P. (BSM)

Reporting relationship: Director
Issuer ticker: BSM
Reported as of: 02 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Jul 2026, 16:55:45 UTC
Prior SEC filing: 02 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Steve Putman, attorney-in-fact for D. Mark DeWalch

Key filing fact

D. Mark DeWalch filed Form 4 for Black Stone Minerals, L.P. (BSM) on 02 Jul 2026.

Key facts

This page summarizes D. Mark DeWalch's Form 4 filing for Black Stone Minerals, L.P. (BSM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Jul 2026, 16:55.

Change

Previous filing in this sequence was filed on 02 Jun 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001638259 Primary reporting owner

DeWalch D Mark

Relationship: Director
Address: 1001 FANNIN STREET, SUITE 2020, HOUSTON
Signature: /s/ Steve Putman, attorney-in-fact for D. Mark DeWalch
Signature date: 02 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BSM transaction

Common units representing limited partner interests

Award

Transaction value
Shares: +1,342
Change %: +0.31%
Price: $13.97^*
Shares after: 432,837
Date: 02 Jul 2026
Ownership: Direct
Footnotes: F1

BSM holding

Common units representing limited partner interests

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 631,248
Date: 02 Jul 2026
Ownership: By DeWalch Diversified LP

BSM holding

Common units representing limited partner interests

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 40,809
Date: 02 Jul 2026
Ownership: By Donald Mark DeWalch Trust

BSM holding

Common units representing limited partner interests

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 6,749
Date: 02 Jul 2026
Ownership: By wife

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

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.