WLK
Westlake Corporation
NYSE · Basic Materials · Chemicals - Specialty · US
$74.44
−0.21%0
Insider buys (3m)
2
Insider sells (3m)
-$3.1M
Net value (3m)
-10.9%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Sep 1, 2026 | Darby Tommy · officer: VP and CAO | A-Award | 1,791 | $0.00 |
| Aug 17, 2026 | Patel Bhavesh V. · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | NORTHCUTT R BRUCE · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | Sabat Carolyn Chao · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | CREGG ROGER A · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | Chao David Tsung-Hung · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | Lubel Kimberly S · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | Sheets Jeffrey Wayne · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | Chao Catherine T. · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | Graff Michael J · director | A-Award | 2,184 | $0.00 |
| Aug 17, 2026 | MCCOLLUM MARK A · director | A-Award | 2,184 | $0.00 |
| Aug 11, 2026 | Chao Albert · director, officer: Executive Chairman | M-Exempt | 38,873 | $62 |
| Aug 11, 2026 | Chao Albert · director, officer: Executive Chairman | Sale | 7,489 | $80 |
| Aug 11, 2026 | Chao Albert · director, officer: Executive Chairman | Sale | 31,384 | $80 |
| Aug 10, 2026 | Graff Michael J · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | Chao Catherine T. · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | NORTHCUTT R BRUCE · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | Lubel Kimberly S · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | CREGG ROGER A · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | MCCOLLUM MARK A · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | Sabat Carolyn Chao · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | Sheets Jeffrey Wayne · director | M-Exempt | 2,168 | $0.00 |
| Aug 10, 2026 | Chao David Tsung-Hung · director | M-Exempt | 2,168 | $0.00 |
| Jun 16, 2026 | Baksht Jonathan · officer: SVP and CFO | A-Award | 20,580 | $0.00 |
| May 14, 2026 | Bender Mark Steven · officer: EVP & CFO | M-Exempt | 13,164 | $0.00 |
| May 14, 2026 | Bender Mark Steven · officer: EVP & CFO | F-InKind | 5,284 | $97 |
| Apr 6, 2026 | Powers Brian John · officer: SVP, PEM Segment Head | A-Award | 1,961 | $0.00 |
| Mar 31, 2026 | Buesinger Robert F. · officer: EVP, PEM Segment Head | Sale | 4,000 | $115 |
| Mar 30, 2026 | Bender Mark Steven · officer: EVP & CFO | Sale | 16,413 | $113 |
| Mar 6, 2026 | Bender Mark Steven · officer: EVP & CFO | F-InKind | 1,171 | $105 |
Institutional positioning
13F filings over the trailing two quarters
New 176Increased 226Reduced 212Sold out 64
| Filer | Action | Shares | Filed |
|---|---|---|---|
| ORBIS ALLAN GRAY LTD | Increased | 5,293,519 | May 15, 2026 |
| CAPITAL WORLD INVESTORS | Increased | 4,211,006 | May 13, 2026 |
| BlackRock, Inc. | Increased | 3,294,162 | Aug 7, 2026 |
| BLACKROCK, INC. | Reduced | 3,079,087 | May 13, 2026 |
| Capital World Investors | Reduced | 2,842,348 | Aug 12, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 2,407,457 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 2,206,676 | Aug 14, 2026 |
| Orbis Allan Gray Ltd | Reduced | 2,084,364 | Aug 14, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Increased | 2,051,554 | Aug 11, 2026 |
| BRANDES INVESTMENT PARTNERS, LP | Increased | 1,842,650 | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 1,793,517 | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 1,769,808 | May 8, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 1,752,627 | Aug 13, 2026 |
| BRANDES INVESTMENT PARTNERS, LP | Reduced | 1,572,939 | Aug 14, 2026 |
| AQR CAPITAL MANAGEMENT LLC | Increased | 1,570,453 | Aug 14, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Sep 1, 2026