Westlake WLK SEC Filings

NYSE WLK
$60.77 -1.92 (-3.06%)
As of: Oct 21, 2026 · 3:59 PM EDT
EDGAR Disclosures

SEC Filings

Source SEC EDGAR

Every SEC filing Westlake Corp (WLK) has made, as reported on EDGAR — annual and quarterly reports, current reports, insider transactions and ownership disclosures. Filter by form group, form type or period, and open any filing or its index directly.

Form Type
# Form Type Form Group Accession Date Filing Index
18-KCurrent Report0001262823-26-000067Sep 29, 2026 6:06 AM
24Insider Transaction0001193125-26-377500Sep 1, 2026 11:14 AM
33Insider Transaction0001193125-26-377110Aug 31, 2026 9:30 PM
48-KCurrent Report0001193125-26-376996Aug 31, 2026 9:00 PM
5CERTOthers0000876882-26-000021Aug 21, 2026 2:55 PM
68-A12BOthers0001262823-26-000060Aug 21, 2026 2:00 PM
74Insider Transaction0001193125-26-353632Aug 17, 2026 4:28 PM
84Insider Transaction0001193125-26-353631Aug 17, 2026 4:28 PM
94Insider Transaction0001193125-26-353630Aug 17, 2026 4:27 PM
104Insider Transaction0001193125-26-353629Aug 17, 2026 4:27 PM
114Insider Transaction0001193125-26-353628Aug 17, 2026 4:27 PM
124Insider Transaction0001193125-26-353626Aug 17, 2026 4:26 PM
134Insider Transaction0001193125-26-353625Aug 17, 2026 4:26 PM
144Insider Transaction0001193125-26-353624Aug 17, 2026 4:25 PM
154Insider Transaction0001193125-26-353623Aug 17, 2026 4:25 PM
164Insider Transaction0001193125-26-353621Aug 17, 2026 4:25 PM
174Insider Transaction0001193125-26-345140Aug 11, 2026 9:45 PM
18144Insider Transaction0001950047-26-007941Aug 11, 2026 8:14 PM
194Insider Transaction0001193125-26-342011Aug 10, 2026 5:54 PM
204Insider Transaction0001193125-26-342010Aug 10, 2026 5:53 PM
214Insider Transaction0001193125-26-342008Aug 10, 2026 5:53 PM
224Insider Transaction0001193125-26-342006Aug 10, 2026 5:52 PM
234Insider Transaction0001193125-26-342004Aug 10, 2026 5:52 PM
244Insider Transaction0001193125-26-342001Aug 10, 2026 5:51 PM
254Insider Transaction0001193125-26-341999Aug 10, 2026 5:51 PM
264Insider Transaction0001193125-26-341997Aug 10, 2026 5:50 PM
274Insider Transaction0001193125-26-341996Aug 10, 2026 5:50 PM
2810-QQuarterly & Annual Report0001262823-26-000032Aug 5, 2026 6:27 PM
298-KCurrent Report0001262823-26-000026Aug 4, 2026 7:27 AM
308-KCurrent Report0001193125-26-324110Jul 29, 2026 4:45 PM
314Insider Transaction0001193125-26-272102Jun 16, 2026 3:25 PM
328-KCurrent Report0001193125-26-271206Jun 15, 2026 8:45 PM
333Insider Transaction0001193125-26-270921Jun 15, 2026 7:00 PM
34SDOthers0001193125-26-229097May 18, 2026 5:00 PM
358-KCurrent Report0001193125-26-229093May 18, 2026 5:00 PM
364Insider Transaction0001193125-26-223323May 14, 2026 4:33 PM
3710-QQuarterly & Annual Report0001262823-26-000022May 6, 2026 5:49 PM
3810-QQuarterly & Annual Report0001262823-26-000022May 6, 2026 5:49 PM
3910-QQuarterly & Annual Report0001262823-26-000022May 6, 2026 5:49 PM
408-KCurrent Report0001262823-26-000019May 5, 2026 11:30 AM
418-KCurrent Report0001262823-26-000019May 5, 2026 11:30 AM
428-KCurrent Report0001262823-26-000019May 5, 2026 7:30 AM
438-KCurrent Report0001193125-26-199067May 1, 2026 11:08 AM
448-KCurrent Report0001193125-26-164225Apr 20, 2026 9:05 PM
458-KCurrent Report0001193125-26-153703Apr 14, 2026 10:01 AM
464Insider Transaction0002126961-26-000004Apr 6, 2026 12:02 PM
474Insider Transaction0002126961-26-000004Apr 6, 2026 12:02 PM
484Insider Transaction0002126961-26-000004Apr 6, 2026 12:02 PM
498-KCurrent Report0001193125-26-142822Apr 6, 2026 10:02 AM
503Insider Transaction0002126961-26-000002Apr 2, 2026 7:13 PM
...

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