Black Stone Minerals Ownership & Insider Activity

Black Stone Minerals (BSM) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 5.8% of shares outstanding. Institutional investors hold 3.6%.

Shares Outstanding

212.711M

Shares Float

175.660M

Insider Shares Owned

12.287M

Insider % Owned

5.8%

Institutional Shares Held

7.623M

Institutional % Held

3.6%

Ownership Breakdown

Net Insider Activity by Month

Black Stone Minerals Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 6, 2026	James Whitehead	DIRECTOR	SELL	2.127M	$13.21	$28.1M
May 29, 2026	D. Mark DeWalch	DIRECTOR	BUY	72.726K	$13.55	$985K
May 28, 2026	D. Mark DeWalch	DIRECTOR	BUY	37.650K	$13.21	$497K
May 13, 2026	Thomas L. Carter, Jr.	EXECUTIVE CHAIRMAN	BUY	1.120K	$13.50	$15K
May 12, 2026	Ashley J Longmaid	DIRECTOR	SELL	11.128K	$13.45	$150K

Date	Member	Party	Chamber	Action	Amount
Feb 21, 2023	Thomas R. Carper	D	Senate	Purchase	$1,001 - $15,000