Oscar K. Brown - 28 Oct 2025 Form 4 Insider Report for Western Midstream Partners, LP (WES)

Role: President & CEO, Director
Signature: /s/ Philip C. Neisel, as attorney-in-fact
Issuer symbol: WES
Transactions as of: 28 Oct 2025
Net transactions value: -$803,599
Form type: 4
Filing time: 29 Oct 2025, 16:06:46 UTC
Previous filing: 21 Feb 2025
Next filing: 13 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Brown Oscar K	President & CEO, Director	9950 WOODLOCH FOREST DR., THE WOODLANDS	/s/ Philip C. Neisel, as attorney-in-fact	29 Oct 2025	0001715126

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WES	Common Units representing limited partner interests	Options Exercise	$0	+52,660	+132%	$0.000000	92,650	28 Oct 2025	Direct
transaction	WES	Common Units representing limited partner interests	Tax liability	$803,599	-20,722	-22%	$38.78	71,928	28 Oct 2025	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WES	2024 Phantom Units	Options Exercise	$0	-52,660	-33%	$0.000000	105,318	28 Oct 2025	Common Units representing limited partner interests	52,660		Direct	F1, F2
holding	WES	2025 Phantom Units						72,063	28 Oct 2025	Common Units representing limited partner interests	72,063		Direct	F1, F3
holding	WES	2025 Performance Unit-ROA						36,032	28 Oct 2025	Common Units representing limited partner interests	36,032		Direct	F4
holding	WES	2025 Performance Unit-TUR						36,032	28 Oct 2025	Common Units representing limited partner interests	36,032		Direct	F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each Phantom Unit is the economic equivalent of one WES Common Unit representing limited partnership interests, and upon vesting, will entitle the holder to receive a common unit or, at the discretion of the Board of Directors of the General Partner, cash equal to the Fair Market Value of a Common Unit.
F2	These Phantom Units vest ratably over a three-year period on October 28th each year, and will pay distribution equivalent rights in cash on a current basis.
F3	These Phantom Units vest ratably over a three-year period on February 12th of each year, and will pay distribution equivalent rights in cash on a current basis.
F4	Each performance-based unit represents the right to receive, following vesting, between 0% and 200% of one WES Common Unit based upon the achievement of pre-established performance metrics over a 3-year performance period.