Catherine T. Chao

Date	Company	Security	Transaction	Code	Indirect	10b5-1	#Shares	#Remaining
11 Aug 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	1,136	4,452
11 Aug 24	WLK Westlake	RSU Common Stock	Option exercise	Dispose M	No	No	1,136	0
9 Aug 24	WLK Westlake	RSU Common Stock	Grant	Acquire A	No	No	1,128	1,128
12 May 24	WLK Westlake	Common Stock	Option exercise	Acquire M	No	No	1,316	3,316
12 May 24	WLK Westlake	RSU Common Stock	Option exercise	Dispose M	No	No	1,316	0
31 Aug 23	WLK Westlake	Common Stock	Gift	Acquire G	Yes	No	19,423	19,423
11 Aug 23	WLK Westlake	RSU Common Stock	Grant	Acquire A	No	No	1,136	1,136

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