BSM
Black Stone Minerals L.P.
$2.26M
Cluster buy
Discretionary Insider Activity
Date:
05/08/2026
Insiders:
Carter Thomas L Jr, director, and 2 others
Prior trend:
8 months of no clear discretionary insider activity

Summary

A $2.26M cluster buy for Black Stone Minerals L.P. (BSM) on 05/08/2026 after 8 months of no clear discretionary insider activity trend.

Reports

Action Amount Date Insider Role(s) SEC Filing No
Buy $909K 05/12/2026 Carter Thomas L Jr Director, Executive Chairman 0001319960-26-000010
Sell $150K 05/13/2026 Longmaid Ashley J Director 0002017596-26-000004
Buy $15K 05/14/2026 Carter Thomas L Jr Director, Executive Chairman 0001319960-26-000012
Buy $497K 05/28/2026 DeWalch D Mark Director 0001638259-26-000008
Buy $985K 06/02/2026 DeWalch D Mark Director 0001638259-26-000010

Stake Changes

Action Insider Role(s) Total Change % Change
Buy Carter Thomas L Jr Director, Executive Chairman $924K 1.9%
Sell Longmaid Ashley J Director $150K 7.5%
Buy DeWalch D Mark Director $1.48M 60.3%

Transactions

Action Amount Date Insider Security Type SEC Code
Buy $314K 05/08/2026 Carter Thomas L Jr Common units representing limited partner interests Discretionary Purchase
Buy $337K 05/11/2026 Carter Thomas L Jr Common units representing limited partner interests Discretionary Purchase
Buy $258K 05/12/2026 Carter Thomas L Jr Common units representing limited partner interests Discretionary Purchase
Sell $150K 05/12/2026 Longmaid Ashley J Common units representing limited partner interests Discretionary Sale
Buy $15K 05/13/2026 Carter Thomas L Jr Common units representing limited partner interests Discretionary Purchase
Buy $497K 05/28/2026 DeWalch D Mark Common units representing limited partner interests Discretionary Purchase
Buy $490K 05/29/2026 DeWalch D Mark Common units representing limited partner interests Discretionary Purchase
Buy $495K 06/01/2026 DeWalch D Mark Common units representing limited partner interests Discretionary Purchase

Stats

Prior max multiple:
4.5
Prior median multiple:
4.5

Metadata

Signal ID:
6kHZ8bxbIPCj29TS
Scanned on:
06/02/2026
Status:
Current