WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

CSS LLC/IL's Holding History (CIK: 0001103646)

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

Q4 2023

Shares 2,500 Value ($000) $350 Avg Close $121.60 Range $107.83 - $137.84

Q3 2023

Shares 2,500 Value ($000) $312 Avg Close $122.44 Range $108.80 - $131.81

Q1 2023

Shares 2,500 Value ($000) $290 Avg Close $109.37 Range $92.83 - $119.59

Q4 2022

Shares 2,500 Value ($000) $256 Avg Close $95.20 Range $80.55 - $107.11

Q3 2022

Shares 3,000 Value ($000) $261 Avg Close $90.33 Range $76.70 - $104.08

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2023	2,500	$350	$121.60	$107.83 - $137.84
Q3 2023	2,500	$312	$122.44	$108.80 - $131.81
Q1 2023	2,500	$290	$109.37	$92.83 - $119.59
Q4 2022	2,500	$256	$95.20	$80.55 - $107.11
Q3 2022	3,000	$261	$90.33	$76.70 - $104.08