WLK

Westlake Corp

Company with tickers: WLK

Market Cap

$9.81B

Shares Outstanding

128,122,944

CIK

1262823

CUSIP

960413102

13F Activity (30d)

29 filings 5 filers

Website

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Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.

Date	Insider	Role	Type	Shares	Price	Value	After
2026-06-15	Baksht Jonathan	Executive Vice President & CFO	Other	0	—	—	0
2026-06-15	Baksht Jonathan	Executive Vice President & CFO	Award	20,580	—	—	20,580
2026-05-13	Bender Mark Steven	Director, SVP, CFO	Tax	5,284	$97.34	$514,345	35,895
2026-05-12	Bender Mark Steven	Director, SVP, CFO	Convert	13,164	—	—	0
2026-05-12	Bender Mark Steven	Director, SVP, CFO	Convert	13,164	—	—	41,179
2026-04-02	Powers Brian John	SVP, PEM Segment Head	Award	1,961	—	—	1,961
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	Convert	6,199	$65.81	$407,972	68,041
2026-02-27	Bender Mark Steven	Director, SVP, CFO	Sell	421	$101.52	$42,738	44,433
2026-02-27	Bender Mark Steven	Director, SVP, CFO	Convert	6,494	—	—	0
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	6,494	$86.54	$561,977	74,535
2026-02-20	Chao John Tsung-chen	Director	Award	4,044	—	—	4,044
2026-02-20	Gilson Jean-Marc	Director, President and CEO	Award	29,784	—	—	29,784
2026-02-20	Buesinger Robert F.	EVP, PEM Segment Head	Award	5,281	—	—	5,281
2026-02-20	Gilson Jean-Marc	Director, President and CEO	Award	109,139	—	—	109,139
2026-02-20	Chao James	Director, Senior Chairman	Tax	1,569	$94.10	$147,644	49,774
2026-02-20	Chao James	Director, Senior Chairman	Award	7,472	—	—	7,472
2026-02-20	Chao John Tsung-chen	Director	Award	2,434	—	—	2,434
2026-02-20	Ederington L. Benjamin	Director, VP, General Counsel	Tax	357	$94.10	$33,594	80,158
2026-02-20	Patel Bhavesh V.	Director	Other	0	—	—	0
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	Chao James	Director, Senior Chairman	Award	27,382	—	—	27,382
2026-02-20	Holy Jeffrey Adam	VP and CAO	Award	2,540	—	—	2,540
2026-02-20	Holy Jeffrey Adam	VP and CAO	Tax	81	$94.10	$7,622	5,124
2026-02-20	Chao Albert	Director, President & CEO, 10% Owner	Tax	2,501	$94.10	$235,347	642,880
2026-02-20	Ederington L. Benjamin	Director, VP, General Counsel	Award	7,002	—	—	7,002
2026-02-20	Ederington L. Benjamin	Director, VP, General Counsel	Award	25,656	—	—	25,656
2026-02-20	Buesinger Robert F.	EVP, PEM Segment Head	Award	19,351	—	—	19,351
2026-02-20	Chao Albert	Director, President & CEO, 10% Owner	Award	54,763	—	—	54,763
2026-02-20	Buesinger Robert F.	EVP, PEM Segment Head	Tax	326	$94.10	$30,677	38,482
2026-02-20	Bender Mark Steven	Director, SVP, CFO	Tax	445	$94.10	$41,874	61,842
2026-02-20	Holy Jeffrey Adam	VP and CAO	Award	4,394	—	—	4,394
2026-02-20	Patel Bhavesh V.	Director	Award	1,852	—	—	1,852
2026-02-20	Szwejbka Scott Thomas	SVP, HIP Segment Head	Tax	91	$94.10	$8,563	13,773
2026-02-20	Bender Mark Steven	Director, SVP, CFO	Award	28,389	—	—	28,389
2026-02-20	Chao John Tsung-chen	Director	Tax	91	$94.10	$8,563	7,888
2026-02-20	Chao Albert	Director, President & CEO, 10% Owner	Award	14,945	—	—	14,945
2026-02-20	Bender Mark Steven	Director, SVP, CFO	Award	7,747	—	—	7,747
2026-02-20	Chao John Tsung-chen	Director	Award	1,104	—	—	1,104
2026-02-19	Chao John Tsung-chen	Director	Award	213	—	—	7,979
2026-02-19	Buesinger Robert F.	EVP, PEM Segment Head	Award	1,301	—	—	38,808
2026-02-19	Ederington L. Benjamin	Director, VP, General Counsel	Award	1,425	—	—	80,515
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

Showing 1–50 of 962 transactions