WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

Note: Option positions (PUT/CALL) are excluded.

Q1 2022

Shares 2,324 Value ($000) $287 Avg Close $102.15 Range $87.54 - $119.36

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2022	2,324	$287	$102.15	$87.54 - $119.36