Chao Albert

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
16 Aug 24	WLK Westlake	Common Stock	Sale back to company	Dispose D	No	No	147.04	7	1.03 k	554,916
16 Aug 24	WLK Westlake	Common Stock	Sale back to company	Dispose D	No	No	146.613	45,291	6.64 mm	554,923
16 Aug 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	68.09	45,298	3.08 mm	600,214
16 Aug 24	WLK Westlake	Employee Option Common Stock	Option exercise	Dispose M	No	No	68.09	45,298	3.08 mm	0
20 Feb 24	WLK Westlake	Common Stock	Payment of exercise	Dispose F	No	No	137.369	2,207	303.17 k	554,916
20 Feb 24	WLK Westlake	Common Stock	Payment of exercise	Dispose F	No	No	135.43	12	1.63 k	557,123
20 Feb 24	WLK Westlake	Common Stock	Payment of exercise	Dispose F	No	No	129.92	22,561	2.93 mm	557,135
19 Feb 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	0	19,810	0.00	579,696
19 Feb 24	WLK Westlake	RSU Common Stock	Option exercise	Dispose M	No	No	0	19,810	0.00	0
16 Feb 24	WLK Westlake	RSU Common Stock	Grant	Acquire A	No	No	0	16,010	0.00	16,010

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