Form 4 for BSM Black Stone Minerals, L.P.

Accepted 2026-06-02 16:32:59 ET · period of report 2026-05-29 · accession 0001638259-26-000010 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
MI	2026-06-02 16:32	2026-05-29+	BSM	DeWalch D Mark	Dir	P - Purchase	$13.55	+72.7K	631.2K	+13%	+$985.4K

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common units representing limited partner interests	2026-05-29	P	A	36,363	$13.48	594,885	I By DeWalch Diversified LP	—	—	(F1) The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $13.42 to $13.56, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.
2	Common	Common units representing limited partner interests	2026-06-01	P	A	36,363	$13.62	631,248	I By DeWalch Diversified LP	—	—	(F2) The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $13.54 to $13.695, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.