WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

CAPSTONE INVESTMENT ADVISORS, LLC's Holding History (CIK: 0001426196)

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

Q4 2025

Shares 3,119 Value ($000) $231 Avg Close $70.79 Range $55.84 - $82.75

Q2 2024

Shares 3,499 Value ($000) $507 Avg Close $148.16 Range $138.77 - $156.68

Q1 2024

Shares 6,195 Value ($000) $947 Avg Close $135.33 Range $113.88 - $147.53

Q4 2023

Shares 3,416 Value ($000) $478 Avg Close $121.60 Range $107.83 - $137.84

Q3 2023

Shares 1,653 Value ($000) $206 Avg Close $122.44 Range $108.80 - $131.81

Q1 2016

Shares 7,900 Value ($000) $365 Avg Close $39.11 Range $34.33 - $46.52

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,119	$231	$70.79	$55.84 - $82.75
Q2 2024	3,499	$507	$148.16	$138.77 - $156.68
Q1 2024	6,195	$947	$135.33	$113.88 - $147.53
Q4 2023	3,416	$478	$121.60	$107.83 - $137.84
Q3 2023	1,653	$206	$122.44	$108.80 - $131.81
Q1 2016	7,900	$365	$39.11	$34.33 - $46.52