BROWN OSCAR K exercised options at WESTERN MIDSTREAM PARTNERS, LP

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise

BROWN OSCAR K

Filed: 2/13/2026ACC: 0001423902-26-000019

InsiderBROWN OSCAR KCIK 1715126

→

IssuerWESTERN MIDSTREAM PARTNERS, LPCIK 1423902

Director

Since Aug 2019

+178.39K

Net shares

Net buyer

$445.1K

Total sold

Open market trades

0B · 0S

Total transactions

212.93K acquired · 34.53K disposed

Non-Derivative Transactions2

Common Units representing limited partner interests

Direct

M · Option Exercise

+24.02K

Price / share

—

Trade value

—

% of position

33.4%

2/12/2026

71.93K→95.95K

Common Units representing limited partner interests

Direct

F · Tax Withholding

−10.51K

Price / share

$42.35

Trade value

$445.10K

% of position

11.0%

2/12/2026

95.95K→85.44K

Total

Net shares

+13.51K

Net value

-$445.10K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Units representing limited partner interests Direct	2/12/2026	M · Option Exercise	+24.02K	—	—	33.4%	71.93K	95.95K
Common Units representing limited partner interests Direct	2/12/2026	F · Tax Withholding	−10.51K	$42.35	$445.10K	11.0%	95.95K	85.44K
Total			+13.51K		-$445.10K

Derivative Transactions4

2025 Phantom Units

Direct

M · Option Exercise

Converts to

Common Units representing limited partner interests

24.02K shares

−24.02K

Strike price

Held after

48.04K

Exercisable

—

2/12/2026

2026 Phantom Units

Direct

A · Award

Converts to

Common Units representing limited partner interests

94.45K shares

+94.45K

Strike price

Held after

94.45K

Exercisable

—

2/12/2026

2026 Performance Unit - TUR

Direct

A · Award

Converts to

Common Units representing limited partner interests

47.23K shares

+47.23K

Strike price

Held after

47.23K

Exercisable

—

2/12/2026

2026 Performance Unit - ROA

Direct

A · Award

Converts to

Common Units representing limited partner interests

47.23K shares

+47.23K

Strike price

Held after

47.23K

Exercisable

—

2/12/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
2025 Phantom Units Direct	Common Units representing limited partner interests24.02K shares	2/12/2026	M · Option Exercise	−24.02K	—	48.04K
2026 Phantom Units Direct	Common Units representing limited partner interests94.45K shares	2/12/2026	A · Award	+94.45K	—	94.45K
2026 Performance Unit - TUR Direct	Common Units representing limited partner interests47.23K shares	2/12/2026	A · Award	+47.23K	—	47.23K
2026 Performance Unit - ROA Direct	Common Units representing limited partner interests47.23K shares	2/12/2026	A · Award	+47.23K	—	47.23K

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)3

2025 Performance Unit-ROA

Direct

Underlying security

Common Units representing limited partner interests

Underlying shares

36.03K

Shares owned

36.03K

Exercise price

Expiration

—

Exercise window

—

2025 Performance Unit-TUR

Direct

Underlying security

Common Units representing limited partner interests

Underlying shares

36.03K

Shares owned

36.03K

Exercise price

Expiration

—

Exercise window

—

2024 Phantom Units

Direct

Underlying security

Common Units representing limited partner interests

Underlying shares

105.32K

Shares owned

105.32K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

177.38K

Owned

177.38K

Security	Underlying	Exercise Window	Expiration	Underlying Shares	Shares Owned
2025 Performance Unit-ROA Direct	Common Units representing limited partner interests	—	—	36.03K	36.03K
2025 Performance Unit-TUR Direct	Common Units representing limited partner interests	—	—	36.03K	36.03K
2024 Phantom Units Direct	Common Units representing limited partner interests	—	—	105.32K	105.32K
Total				177.38K	177.38K