Thomas J. Janssens

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
23 Aug 24	WLK Westlake	Common Stock	Sale back to company	Dispose D	No	No	149.484	14,864	2.22 mm	12,063
23 Aug 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	86.5379	4,020	347.88 k	26,927
23 Aug 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	65.8125	6,507	428.24 k	22,907
23 Aug 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	79.83	4,337	346.22 k	16,400
23 Aug 24	WLK Westlake	Employee Option Common Stock	Option exercise	Dispose M	No	No	86.5379	4,020	347.88 k	0
23 Aug 24	WLK Westlake	Employee Option Common Stock	Option exercise	Dispose M	No	No	65.8125	6,507	428.24 k	0
23 Aug 24	WLK Westlake	Employee Option Common Stock	Option exercise	Dispose M	No	No	79.83	4,337	346.22 k	0
20 Feb 24	WLK Westlake	Common Stock	Payment of exercise	Dispose F	No	No	138.65	88	12.20 k	12,063
20 Feb 24	WLK Westlake	Common Stock	Payment of exercise	Dispose F	No	No	129.92	896	116.41 k	12,151
19 Feb 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	0	1,170	0.00	13,047

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.