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Westlake (WLK) SEC Filings & 10K Form

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Recent Westlake SEC Filings

DateFilerForm TypeView
08/26/2025
3:46 PM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/11/2025
9:15 AM
Sheets Jeffrey Wayne (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:16 AM
CREGG ROGER A (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:16 AM
Lubel Kimberly S (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:16 AM
MCCOLLUM MARK A (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:16 AM
Sabat Carolyn Chao (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:17 AM
NORTHCUTT R BRUCE (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:17 AM
Chao David Tsung-Hung (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:18 AM
Chao Catherine T. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025
9:18 AM
Graff Michael J (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/05/2025
6:25 AM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/17/2025
5:01 AM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/09/2025
12:59 PM
Buesinger Robert F. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
05/23/2025
4:00 PM
Westlake (Filer)
Form SD
Specialized Disclosure Report  
05/12/2025
3:45 PM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/02/2025
2:18 PM
Westlake (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
05/02/2025
6:25 AM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/15/2025
5:00 PM
Szwejbka Scott Thomas (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
04/15/2025
5:00 PM
Buesinger Robert F. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
04/14/2025
5:00 PM
Szwejbka Scott Thomas (Reporting)
Westlake (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
03/28/2025
7:23 AM
Westlake (Filer)
Form DEF 14A
03/28/2025
7:27 AM
Westlake (Filer)
Form DEFA14A
03/28/2025
7:30 AM
Westlake (Filer)
Form ARS
03/07/2025
6:00 AM
Chao John Tsung-chen (Reporting)
Westlake (Issuer)
Form 4/A
03/06/2025
8:05 AM
Chao John Tsung-chen (Reporting)
Westlake (Issuer)
Form 4/A
03/04/2025
4:30 PM
Gilson Jean-Marc (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2025
3:16 PM
Westlake (Filer)
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
02/24/2025
1:10 PM
Bender Mark Steven (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:10 PM
Buesinger Robert F. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:10 PM
Chao Albert (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:11 PM
Chao James (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:13 PM
Janssens Thomas J. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:14 PM
Ederington L. Benjamin (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:14 PM
Holy Jeffrey Adam (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:14 PM
Chao John Tsung-chen (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
1:14 PM
Gilson Jean-Marc (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2025
6:28 AM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/20/2025
1:36 PM
Holy Jeffrey Adam (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2025
1:38 PM
Janssens Thomas J. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2025
1:39 PM
Bender Mark Steven (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2025
1:39 PM
Buesinger Robert F. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
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02/20/2025
1:40 PM
Ederington L. Benjamin (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2025
1:41 PM
Chao John Tsung-chen (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2025
1:30 PM
Chao Albert (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2025
1:34 PM
Chao James (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/19/2025
8:18 AM
Ederington L. Benjamin (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
02/19/2025
8:19 AM
Janssens Thomas J. (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
12/10/2024
6:24 PM
CREGG ROGER A (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
12/10/2024
6:05 PM
CREGG ROGER A (Reporting)
Westlake (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
12/02/2024
6:49 AM
Chao David Tsung-Hung (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
11/26/2024
6:12 PM
Chao David Tsung-Hung (Reporting)
Westlake (Subject)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/25/2024
7:21 AM
Chao David Tsung-Hung (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
11/21/2024
3:58 PM
Chao David Tsung-Hung (Reporting)
Westlake (Subject)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/06/2024
9:49 AM
Westlake (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
11/05/2024
6:26 AM
Westlake (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/03/2024
8:39 AM
Chao James (Reporting)
Westlake (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
(Data available from 1/1/2016 forward)


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This page (NYSE:WLK) was last updated on 8/29/2025 by MarketBeat.com Staff
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