STUART ALEXANDER D. reported 1 transaction at BLACK STONE MINERALS, L.P.

Review the transaction codes below to understand the nature of each event.

STUART ALEXANDER D.

Filed: 8/19/2026ACC: 0001639921-26-000011

InsiderSTUART ALEXANDER D.CIK 1639921

→

IssuerBLACK STONE MINERALS, L.P.CIK 1621434

Director

Since Jul 2018

-15.90K

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

15.90K disposed

Non-Derivative Transactions1

Common units representing limited partner interests

Direct

G · Gift

−15.90K

Price / share

—

Trade value

—

% of position

0.8%

8/18/2026

2.06M→2.04M

Total

Net shares

−15.90K

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common units representing limited partner interests Direct	8/18/2026	G · Gift	−15.90K	—	—	0.8%	2.06M	2.04M
Total			−15.90K		$0.00

Derivative Transactions0

No derivative transactions reported

Non-Derivative Holdings (Post-Transaction)11

Common units representing limited partner interests

Indirect

Shares owned286.98K

Common units representing limited partner interests

Indirect

Shares owned74.54K

Common units representing limited partner interests

Indirect

Shares owned239.33K

Common units representing limited partner interests

Indirect

Shares owned1.25M

Common units representing limited partner interests

Indirect

Shares owned74.54K

Common units representing limited partner interests

Indirect

Shares owned74.54K

Common units representing limited partner interests

Indirect

Shares owned2.11M

Common units representing limited partner interests

Indirect

Shares owned159.90K

Common units representing limited partner interests

Indirect

Shares owned74.54K

Common units representing limited partner interests

Indirect

Shares owned180.78K

Common units representing limited partner interests

Indirect

Shares owned6.69K

Total

4.54M indirect4.54M

Security Title	Shares Owned	Ownership Type
Common units representing limited partner interests	286.98K	Indirect
Common units representing limited partner interests	74.54K	Indirect
Common units representing limited partner interests	239.33K	Indirect
Common units representing limited partner interests	1.25M	Indirect
Common units representing limited partner interests	74.54K	Indirect
Common units representing limited partner interests	74.54K	Indirect
Common units representing limited partner interests	2.11M	Indirect
Common units representing limited partner interests	159.90K	Indirect
Common units representing limited partner interests	74.54K	Indirect
Common units representing limited partner interests	180.78K	Indirect
Common units representing limited partner interests	6.69K	Indirect
Total	4.54M	4.54M indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported