Stocks
WLK WESTLAKE CORP

WLK

WESTLAKE CORP

Company with tickers: WLK

CIK

1262823

CUSIP

960413102

Shares Outstanding

127,910,338

Price Holdings Short Volume Short Interest Fails to Deliver SEC Filings Earnings Calls Insider Trading Congress Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-04-02	Powers Brian John	SVP, PEM Segment Head	Award	1,961	—	—	1,961
2026-04-02	Powers Brian John	SVP, PEM Segment Head	Other	0	—	—	0
2026-04-02	Powers Brian John	SVP, PEM Segment Head	Other	0	—	—	0
2026-03-27	Buesinger Robert F.	EVP, PEM Segment Head	Sell	4,000	$115.25	$461,000	34,482
2026-03-27	Bender Mark Steven	Director, SVP, CFO	Sell	16,413	$112.54	$1,847,037	28,015
2026-02-27	Bender Mark Steven	Director, SVP, CFO	Sell	16,988	$100.91	$1,714,259	44,854
2026-02-27	Bender Mark Steven	Director, SVP, CFO	Other	12,693	$98.20	$1,246,453	61,842
2026-02-27	Bender Mark Steven	Director, SVP, CFO	Convert	6,199	—	—	0
2026-02-27	Bender Mark Steven	Director, SVP, CFO	Convert	6,199	$65.81	$407,972	68,041
2026-02-20	Patel Bhavesh V.	Director	Award	1,852	—	—	1,852
2026-02-20	Bender Mark Steven	Director, SVP, CFO	Tax	445	$94.10	$41,874	61,842
2026-02-20	Bender Mark Steven	Director, SVP, CFO	Award	7,747	—	—	7,747
2026-02-20	Bender Mark Steven	Director, SVP, CFO	Award	28,389	—	—	28,389
2026-02-20	Szwejbka Scott Thomas	SVP, HIP Segment Head	Tax	91	$94.10	$8,563	13,773
2026-02-20	Szwejbka Scott Thomas	SVP, HIP Segment Head	Award	3,983	—	—	3,983
2026-02-20	Szwejbka Scott Thomas	SVP, HIP Segment Head	Award	14,595	—	—	14,595
2026-02-20	Holy Jeffrey Adam	VP and CAO	Award	1,199	—	—	1,199
2026-02-20	Holy Jeffrey Adam	VP and CAO	Tax	81	$94.10	$7,622	5,124
2026-02-20	Holy Jeffrey Adam	VP and CAO	Award	4,394	—	—	4,394
2026-02-20	Gilson Jean-Marc	Director, President and CEO	Award	29,784	—	—	29,784
2026-02-20	Gilson Jean-Marc	Director, President and CEO	Award	109,139	—	—	109,139
2026-02-20	Ederington L. Benjamin	Director, VP, General Counsel	Award	25,656	—	—	25,656
2026-02-20	Ederington L. Benjamin	Director, VP, General Counsel	Tax	357	$94.10	$33,594	80,158
2026-02-20	Ederington L. Benjamin	Director, VP, General Counsel	Award	7,002	—	—	7,002
2026-02-20	Buesinger Robert F.	EVP, PEM Segment Head	Award	5,281	—	—	5,281
2026-02-20	Buesinger Robert F.	EVP, PEM Segment Head	Award	19,351	—	—	19,351
2026-02-20	Buesinger Robert F.	EVP, PEM Segment Head	Tax	326	$94.10	$30,677	38,482
2026-02-20	Chao John Tsung-chen	Director	Award	1,104	—	—	1,104
2026-02-20	Chao John Tsung-chen	Director	Tax	91	$94.10	$8,563	7,888
2026-02-20	Chao John Tsung-chen	Director	Award	4,044	—	—	4,044
2026-02-20	Chao Albert	Director, President & CEO, 10% Owner	Award	54,763	—	—	54,763
2026-02-20	Chao Albert	Director, President & CEO, 10% Owner	Award	14,945	—	—	14,945
2026-02-20	Chao Albert	Director, President & CEO, 10% Owner	Tax	2,501	$94.10	$235,347	642,880
2026-02-20	Chao James	Director, Senior Chairman	Award	27,382	—	—	27,382
2026-02-20	Chao James	Director, Senior Chairman	Award	7,472	—	—	7,472
2026-02-20	Chao James	Director, Senior Chairman	Tax	1,569	$94.10	$147,644	49,774
2026-02-20	Patel Bhavesh V.	Director	Other	0	—	—	0
2026-02-19	Bender Mark Steven	Director, SVP, CFO	Award	1,777	—	—	62,287
2026-02-19	Szwejbka Scott Thomas	SVP, HIP Segment Head	Award	365	—	—	13,864
2026-02-19	Holy Jeffrey Adam	VP and CAO	Award	264	—	—	5,205
2026-02-19	Ederington L. Benjamin	Director, VP, General Counsel	Award	1,425	—	—	80,515
2026-02-19	Buesinger Robert F.	EVP, PEM Segment Head	Award	1,301	—	—	38,808
2026-02-19	Chao John Tsung-chen	Director	Award	213	—	—	7,979
2026-02-19	Chao Albert	Director, President & CEO, 10% Owner	Award	6,193	—	—	645,381
2026-02-19	Chao James	Director, Senior Chairman	Award	3,884	—	—	51,343
2026-02-18	Buesinger Robert F.	EVP, PEM Segment Head	Tax	903	$98.95	$89,352	37,507
2026-02-18	Bender Mark Steven	Director, SVP, CFO	Tax	1,209	$98.95	$119,631	60,510
2026-02-18	Szwejbka Scott Thomas	SVP, HIP Segment Head	Tax	295	$98.95	$29,190	13,499
2026-02-18	Holy Jeffrey Adam	VP and CAO	Tax	213	$98.95	$21,076	4,941
2026-02-18	Ederington L. Benjamin	Director, VP, General Counsel	Tax	978	$98.95	$96,773	79,090
2026-02-18	Chao James	Director, Senior Chairman	Tax	2,664	$98.95	$263,603	47,459
2026-02-18	Chao John Tsung-chen	Director	Tax	242	$98.95	$23,946	7,766
2026-02-18	Chao Albert	Director, President & CEO, 10% Owner	Tax	5,089	$98.95	$503,557	639,188
2026-02-17	Buesinger Robert F.	EVP, PEM Segment Head	Convert	3,478	—	—	38,410
2026-02-17	Buesinger Robert F.	EVP, PEM Segment Head	Convert	3,478	—	—	0
2026-02-17	Bender Mark Steven	Director, SVP, CFO	Convert	4,751	—	—	0
2026-02-17	Bender Mark Steven	Director, SVP, CFO	Convert	4,751	—	—	61,719
2026-02-17	Szwejbka Scott Thomas	SVP, HIP Segment Head	Convert	977	—	—	0
2026-02-17	Szwejbka Scott Thomas	SVP, HIP Segment Head	Convert	977	—	—	13,794
2026-02-17	Holy Jeffrey Adam	VP and CAO	Convert	706	—	—	5,154
2026-02-17	Holy Jeffrey Adam	VP and CAO	Convert	706	—	—	0
2026-02-17	Ederington L. Benjamin	Director, VP, General Counsel	Convert	3,809	—	—	0
2026-02-17	Ederington L. Benjamin	Director, VP, General Counsel	Convert	3,809	—	—	80,068
2026-02-17	Chao James	Director, Senior Chairman	Convert	10,382	—	—	0
2026-02-17	Chao James	Director, Senior Chairman	Convert	10,382	—	—	50,123
2026-02-17	Chao John Tsung-chen	Director	Convert	570	—	—	0
2026-02-17	Chao John Tsung-chen	Director	Convert	570	—	—	7,608
2026-02-17	Chao Albert	Director, President & CEO, 10% Owner	Convert	16,555	—	—	0
2026-02-17	Chao Albert	Director, President & CEO, 10% Owner	Convert	16,555	—	—	644,277
2025-12-22	Chao Albert	Director, President & CEO, 10% Owner	Convert	81,673	—	—	0
2025-12-22	Chao Albert	Director, President & CEO, 10% Owner	Convert	81,673	$44.42	$3,627,915	668,558
2025-12-22	Chao Albert	Director, President & CEO, 10% Owner	Sell	9,711	$72.82	$707,136	658,847
2025-12-10	CREGG ROGER A	Director	Convert	1,339	—	—	0
2025-12-10	CREGG ROGER A	Director	Convert	1,339	—	—	1,339
2025-10-02	Szwejbka Scott Thomas	SVP, HIP Segment Head	Tax	3,842	$76.70	$294,681	12,817
2025-10-01	Szwejbka Scott Thomas	SVP, HIP Segment Head	Convert	10,840	—	—	0
2025-10-01	Szwejbka Scott Thomas	SVP, HIP Segment Head	Convert	10,840	—	—	16,659
2025-08-28	Chao James	Director, Senior Chairman	Gift	15,140	—	—	39,741
2025-08-09	Chao David Tsung-Hung	Director	Convert	1,128	—	—	8,912
2025-08-09	Chao David Tsung-Hung	Director	Convert	1,128	—	—	0
2025-08-09	Chao Catherine T.	Director	Convert	1,128	—	—	0
2025-08-09	Chao Catherine T.	Director	Convert	1,128	—	—	5,580
2025-08-09	Sabat Carolyn Chao	Director	Convert	1,128	—	—	0
2025-08-09	Sabat Carolyn Chao	Director	Convert	1,128	—	—	3,580
2025-08-09	MCCOLLUM MARK A	Director	Convert	1,128	—	—	9,656
2025-08-09	MCCOLLUM MARK A	Director	Convert	1,128	—	—	0
2025-08-09	Lubel Kimberly S	Director	Convert	1,128	—	—	0
2025-08-09	Lubel Kimberly S	Director	Convert	1,128	—	—	11,653
2025-08-09	Graff Michael J	Director	Convert	1,128	—	—	0
2025-08-09	Graff Michael J	Director	Convert	1,128	—	—	21,142
2025-08-09	NORTHCUTT R BRUCE	Director	Convert	1,128	—	—	0
2025-08-09	NORTHCUTT R BRUCE	Director	Convert	1,128	—	—	21,183
2025-08-09	Sheets Jeffrey Wayne	Director	Convert	1,128	—	—	12,759
2025-08-09	Sheets Jeffrey Wayne	Director	Convert	1,128	—	—	0
2025-08-08	Chao David Tsung-Hung	Director	Other	19,423	—	—	19,423
2025-08-08	Chao David Tsung-Hung	Director	Award	2,168	—	—	2,168
2025-08-08	Chao Catherine T.	Director	Award	2,168	—	—	2,168
2025-08-08	Chao Catherine T.	Director	Other	19,423	—	—	19,423
2025-08-08	Sabat Carolyn Chao	Director	Award	2,168	—	—	2,168
2025-08-08	MCCOLLUM MARK A	Director	Award	2,168	—	—	2,168