List of insiders holdings for WESTLAKE CORP:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | Jenkins Dorothy C Director 10% Owner | 2022-08-15 15:23:58 | 75,224 93,405,554 | 93,480,778 | Form 4 |
| 2 | TTWF LP 10% Owner | 2024-02-14 16:15:51 | 93,405,554 0 | 93,405,554 | Form 13G |
| 3 | TTWFGP LLC 10% Owner | 2020-08-20 14:09:23 | 1,395,000 92,010,554 | 93,405,554 | Form 4/A |
| 4 | Chao Albert Executive Chairman | 2026-02-23 14:40:20 | 712,588 0 | 712,588 | Form 4 |
| 5 | Gilson Jean-Marc President and CEO | 2026-02-23 14:44:53 | 138,923 0 | 138,923 | Form 4 |
| 6 | Ederington L. Benjamin EVP, Legal & External Affairs | 2026-02-23 14:44:36 | 112,816 0 | 112,816 | Form 4 |
| 7 | Chao James Senior Chairman | 2026-02-23 14:39:04 | 84,628 0 | 84,628 | Form 4 |
| 8 | Buesinger Robert F. EVP, PEM Segment Head | 2026-02-23 14:43:11 | 63,114 0 | 63,114 | Form 4 |
| 9 | Kearns Roger L. COO and EVP, PEM | 2023-03-15 15:22:23 | 39,849 0 | 39,849 | Form 4/A |
| 10 | Morse Wayne D Sr VP, Vinyls | 2010-03-15 10:03:20 | 35,265 0 | 35,265 | Form 4/A |
| 11 | Szwejbka Scott Thomas SVP, HIP Segment Head | 2026-02-23 14:45:33 | 32,351 0 | 32,351 | Form 4 |
| 12 | Chao David Tsung-Hung Director | 2025-08-11 10:17:51 | 11,080 19,423 | 30,503 | Form 4 |
| 13 | Chao Catherine T. Director | 2025-08-11 10:18:08 | 7,748 19,423 | 27,171 | Form 4 |
| 14 | Teel Lawrence E. EVP and Special Advisor to CEO | 2021-02-26 08:36:37 | 25,860 0 | 25,860 | Form 4 |
| 15 | Taylor Jeffrey L Sr VP, Polyethylene | 2015-05-27 16:26:10 | 25,714 0 | 25,714 | Form 4 |
| 16 | Bender Mark Steven EVP & CFO | 2026-03-06 15:16:14 | 25,608 0 | 25,608 | Form 4/A |
| 17 | Wallace Stephen VP, General Counsel, Secretary | 2013-08-05 16:51:37 | 25,163 200 | 25,363 | Form 4 |
| 18 | Janssens Thomas J. SVP, Ops - PEM & Corp Logistic | 2025-02-24 14:13:57 | 24,944 0 | 24,944 | Form 4 |
| 19 | Wilder Warren W Senior Vice President | 2008-03-18 17:04:59 | 24,085 0 | 24,085 | Form 4 |
| 20 | NORTHCUTT R BRUCE Director | 2025-08-11 10:17:13 | 23,351 0 | 23,351 | Form 4 |
| 21 | Graff Michael J Director | 2025-08-11 10:18:24 | 23,310 0 | 23,310 | Form 4 |
| 22 | RILEY H JOHN JR Director | 2019-03-20 14:06:28 | 22,652 0 | 22,652 | Form 4 |
| 23 | Condon Donald Marion Jr Sr VP, Corp Bus Dev | 2013-03-15 17:07:50 | 17,647 0 | 17,647 | Form 4 |
| 24 | Chao John Tsung-chen Director | 2026-02-23 14:41:33 | 15,470 0 | 15,470 | Form 4 |
| 25 | Bates Simon VP, Building Products | 2016-09-12 16:58:19 | 14,930 0 | 14,930 | Form 4 |
| 26 | Sheets Jeffrey Wayne Director | 2025-08-11 10:15:45 | 14,927 0 | 14,927 | Form 4 |
| 27 | Schubert Lawrence Vice President, Polyethylene | 2017-03-08 16:02:37 | 14,093 0 | 14,093 | Form 3 |
| 28 | Lubel Kimberly S Director | 2025-08-11 10:16:23 | 13,821 0 | 13,821 | Form 4 |
| 29 | Holy Jeffrey Adam VP and CAO | 2026-02-23 14:45:18 | 13,257 0 | 13,257 | Form 4 |
| 30 | Haas Marius Director | 2024-08-12 11:24:27 | 12,759 0 | 12,759 | Form 4 |
| 31 | MCCOLLUM MARK A Director | 2025-08-11 10:16:40 | 11,824 0 | 11,824 | Form 4 |
| 32 | LUKENS MAX L Director | 2019-08-19 09:42:56 | 11,509 0 | 11,509 | Form 4 |
| 33 | BARNETT E WILLIAM Director | 2012-12-03 16:56:24 | 11,447 0 | 11,447 | Form 4 |
| 34 | BLAKELY ROBERT T Director | 2018-08-22 09:29:25 | 10,989 0 | 10,989 | Form 4 |
| 35 | Hansen David R Sr VP Adminstration | 2015-02-24 16:26:40 | 9,814 0 | 9,814 | Form 4 |
| 36 | Kenner Andrew SVP, Operations | 2022-02-22 07:07:59 | 9,229 0 | 9,229 | Form 4 |
| 37 | Keng Tai Li Vice President and Treasurer | 2004-08-18 14:37:45 | 7,800 0 | 7,800 | Form 4 |
| 38 | DREESSEN RUTH I Senior Vice President and CFO | 2005-09-13 12:30:21 | 7,435 0 | 7,435 | Form 4 |
| 39 | Zoeller Johnathan Stevan VP and CAO | 2024-03-22 14:55:01 | 6,751 0 | 6,751 | Form 4 |
| 40 | Mattina Michael J. Sr. VP, Polyethylene | 2017-02-16 16:15:16 | 6,506 0 | 6,506 | Form 4 |
| 41 | Sabat Carolyn Chao Director | 2025-08-11 10:16:56 | 5,748 0 | 5,748 | Form 4 |
| 42 | Mangieri George J VP & Chief Accounting Officer | 2020-02-19 15:34:14 | 4,671 0 | 4,671 | Form 4 |
| 43 | GIBBONS JOHN D Senior Vice President & CFO | 2006-05-17 16:36:31 | 4,249 0 | 4,249 | Form 4 |
| 44 | Whitaker Gilbert R Jr Director | 2006-08-23 16:22:57 | 2,957 0 | 2,957 | Form 4 |
| 45 | Johannesen Andrew Vice President & Treasurer | 2011-01-06 16:03:22 | 2,780 0 | 2,780 | Form 4 |
| 46 | Patel Bhavesh V. Director | 2026-02-24 06:51:33 | 1,852 0 | 1,852 | Form 4 |
| 47 | CREGG ROGER A Director | 2025-12-10 14:47:38 | 1,339 0 | 1,339 | Form 4 |