| $126M | ||
| $85M | ||
| $34M | ||
| $33M | ||
| $32M | ||
| $27M |
Buys | $0 | 0 | 0 |
Sells | $10,190,182 | 5 | 100 |
| Buesinger Robert F. | EVP, PEM Segment Head | 0 | $0 | 1 | $461,000 | $-461,000 |
| Bender Mark Steven | EVP & CFO | 0 | $0 | 2 | $3.6M | $-3.6M |
| Chao Albert | Executive Chairman | 0 | $0 | 2 | $6.13M | $-6.13M |
Westlake Corporation operates as a global producer and supplier of petrochemicals, polymers, and a diverse range of building materials. Its business activities are structured into two main divisions: Performance and Essential Materials, and Housing and Infrastructure Products. The Performance and Essential Materials segment focuses on the manufacture and distribution of various chemical components, including polyethylene, styrene monomer, ethylene co-products, PVC, VCM, ethylene dichloride chlor-alkali, and related chlorinated derivatives. …
Over the last 12 months, insiders at Westlake Corporation have bought $0 and sold $10.19M worth of Westlake Corporation stock.
On average, over the past 5 years, insiders at Westlake Corporation have bought $7,751 and sold $6.56M worth of stock each year.
There was no buying activity among insiders over the last 12 months.
The last purchase of 83 shares for transaction amount of $7,751 was made by Buesinger Robert F. (EVP, PEM Segment Head) on 2025‑04‑22.
| 2026-08-11 | Sale | Chao Albert | Executive Chairman | 38,873 0.0301% | $80.28 | $3.12M | -14.71% | |
| 2026-03-27 | Sale | Buesinger Robert F. | EVP, PEM Segment Head | 4,000 0.0032% | $115.25 | $461,000 | -31.59% | |
| 2026-03-27 | Sale | Bender Mark Steven | EVP & CFO | 16,413 0.0127% | $112.53 | $1.85M | -31.59% | |
| 2026-02-27 | Sale | Bender Mark Steven | EVP & CFO | 17,409 0.013% | $100.92 | $1.76M | -24.42% | |
| 2025-12-22 | Sale | Chao Albert | Executive Chairman | 40,836 0.0315% | $73.57 | $3M | +9.80% | |
| 2025-05-27 | Sale | Buesinger Robert F. | EVP, PEM Segment Head | 83 <0.0001% | $72.70 | $6,034 | +14.56% | |
| 2025-04-22 | Buesinger Robert F. | EVP, PEM Segment Head | 83 <0.0001% | $93.39 | $7,751 | -11.61% | ||
| 2024-11-29 | Sale | Chao David Tsung-Hung | director | 1,750 0.0014% | $129.08 | $225,888 | -32.55% | |
| 2024-11-22 | Sale | Chao David Tsung-Hung | director | 1,750 0.0014% | $130.00 | $227,500 | -33.19% | |
| 2024-05-09 | Sale | Buesinger Robert F. | EVP, HIP, IT & Digital | 3,500 0.0027% | $158.50 | $554,750 | -15.56% | |
| 2024-05-03 | Sale | Bender Mark Steven | EVP & CFO | 4,950 0.0039% | $152.19 | $753,341 | -12.23% | |
| 2024-03-15 | Sale | Buesinger Robert F. | EVP, HIP, IT & Digital | 3,878 0.003% | $144.50 | $560,371 | -2.25% | |
| 2024-03-13 | Sale | Buesinger Robert F. | EVP, HIP, IT & Digital | 122 <0.0001% | $144.50 | $17,629 | -0.39% | |
| 2024-03-06 | Sale | Bender Mark Steven | EVP & CFO | 4,804 0.0037% | $141.02 | $677,455 | +1.83% | |
| 2024-02-26 | Sale | Bender Mark Steven | EVP & CFO | 4,854 0.0038% | $137.57 | $667,765 | +4.98% | |
| 2023-11-15 | Sale | Buesinger Robert F. | EVP, HIP, IT & Digital | 4,215 0.0033% | $130.50 | $550,058 | +12.71% | |
| 2023-08-23 | Sale | Chao David Tsung-Hung | 1,000 0.0008% | $131.00 | $131,000 | +9.51% | ||
| 2022-08-31 | Sale | Buesinger Robert F. | EVP, HIP, IT & Digital | 1,000 0.0008% | $98.94 | $98,940 | +15.44% | |
| 2022-08-26 | Sale | Zoeller Johnathan Stevan | VP & Chief Accounting Officer | 542 0.0004% | $107.08 | $58,037 | +6.07% | |
| 2022-05-27 | Sale | Buesinger Robert F. | EVP, HIP, IT & Digital | 14,427 0.011% | $129.47 | $1.87M | -18.79% |
| Chao Albert | Executive Chairman | 642880 0.503% | $44.02M | 2 | 27 | +55.84% |
| Buesinger Robert F. | EVP, PEM Segment Head | 34482 0.027% | $2.36M | 1 | 26 | <0.0001% |
| TTWFGP LLC | 10 percent owner | 1395000 1.0916% | $95.52M | 9 | 1 | +79.25% |
| Jenkins Dorothy C | 67228 0.0526% | $4.6M | 1 | 2 | +94.94% | |
| Chao James | Chairman | 51492 0.0403% | $3.53M | 1 | 18 | +94.94% |
| Kearns Roger L. | COO and EVP - PEM | 26389 0.0206% | $1.81M | 1 | 2 | +111% |
| Morse Wayne D | Sr VP, Vinyls | 26009 0.0204% | $1.78M | 1 | 7 | +94.94% |
| Wallace Stephen | VP, General Counsel, Secretary | 25163 0.0197% | $1.72M | 1 | 8 | +94.94% |
| Taylor Jeffrey L | Sr VP, Polyethylene | 20206 0.0158% | $1.38M | 2 | 16 | +67.73% |
| Hansen David R | Sr VP Adminstration | 13440 0.0105% | $920,236.80 | 1 | 15 | +94.94% |
| Wilder Warren W | Senior Vice President | 2244 0.0018% | $153,646.68 | 1 | 2 | +94.94% |
| Keng Tai Li | Vice President and Treasurer | 1000 0.0008% | $68,470.00 | 1 | 0 | +94.94% |
| Increased Positions | 162 | +41.65% | 13M | +29.82% |
| Decreased Positions | 180 | -46.27% | 9M | -21.31% |
| New Positions | 66 | New | 4M | New |
| Sold Out Positions | 67 | Sold Out | 3M | Sold Out |
| Total Postitions | 371 | -4.63% | 46M | +8.52% |
| Orbis Allan Gray Ltd | $290,254.00 | 3.06% | 3.91M | +4M | New | 2025-09-30 |
| Vanguard Group Inc | $255,049.00 | 2.69% | 3.44M | -83,179 | -2.36% | 2025-09-30 |
| Blackrock, Inc. | $236,222.00 | 2.49% | 3.19M | -142,960 | -4.29% | 2025-09-30 |
| Victory Capital Management Inc | $212,541.00 | 2.24% | 2.87M | -855,382 | -22.98% | 2025-09-30 |
| Price T Rowe Associates Inc /Md/ | $163,734.00 | 1.73% | 2.21M | +149,555 | +7.26% | 2025-09-30 |
| Brandes Investment Partners, Lp | $114,836.00 | 1.21% | 1.55M | +91,823 | +6.3% | 2025-09-30 |
| Norges Bank | $101,868.00 | 1.07% | 1.37M | +967,104 | +237.79% | 2025-06-30 |
| Dimensional Fund Advisors Lp | $96,413.00 | 1.02% | 1.3M | +25,071 | +1.97% | 2025-09-30 |
| State Street Corp | $96,042.00 | 1.01% | 1.3M | -96,985 | -6.97% | 2025-09-30 |
| Citadel Advisors Llc | $89,043.00 | 0.94% | 1.2M | +1M | +9,658.26% | 2025-09-30 |