WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

GAMCO INVESTORS, INC. ET AL's Holding History (CIK: 0000807249)

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

Q4 2025

Shares 3,941 Value ($000) $291 Avg Close $70.79 Range $55.84 - $82.75

Q3 2025

Shares 4,141 Value ($000) $319 Avg Close $82.33 Range $73.94 - $91.41

Q2 2025

Shares 11,566 Value ($000) $878 Avg Close $80.28 Range $67.52 - $99.92

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,941	$291	$70.79	$55.84 - $82.75
Q3 2025	4,141	$319	$82.33	$73.94 - $91.41
Q2 2025	11,566	$878	$80.28	$67.52 - $99.92