Westlake Ownership & Insider Activity

Westlake (WLK) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 1.1% of shares outstanding. Institutional investors hold 20.8%.

Shares Outstanding

128.489M

Shares Float

33.377M

Insider Shares Owned

1.378M

Insider % Owned

1.1%

Institutional Shares Held

26.530M

Institutional % Held

20.8%

Ownership Breakdown

Net Insider Activity by Month

Westlake Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 11, 2026	Albert Chao	EXECUTIVE CHAIRMAN	SELL-OPTIONS	—	$71.07	$716K

Date	Member	Party	Chamber	Action	Amount
Jun 10, 2021	Susie Lee	D	House	Sale	$1,001 - $15,000