Robert F. Buesinger, EVP and PEM Segment Head at Westlake Corp ($WLK), made one open market purchase of shares in the last year, totaling $7,751, with the most recent on April 22, 2025. This ranks 4,436th out of 4,983 insiders, well below the average of $1.5 million across 3.29 transactions. He also sold shares once for $6,034, most recently on May 27, 2025, ranking 11,375th among 11,678 insiders versus an average of $8.6 million over 6.37 trades.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 27, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | S | Common Stock | 4000 | $115.25 | 34,482.0000 | 128,265,950 | 10.39% | 0.00% |
| Feb. 19, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | A | Common Stock | 1301 | $0.00 | 38,808.0000 | 128,265,950 | 3.47% | 0.00% |
| Feb. 20, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | A | Restricted Stock Units | 5281 | $0.00 | 5,281.0000 | 128,265,950 | 9999.99% | 0.00% |
| Feb. 20, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | A | Employee Option (right to buy) | 19351 | $0.00 | 19,351.0000 | 128,265,950 | 9999.99% | 0.02% |
| Feb. 20, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | F | Common Stock | 326 | $94.10 | 38,482.0000 | 128,265,950 | 0.84% | 0.00% |
| Feb. 17, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | M | Restricted Stock Units | 3478 | $0.00 | 0.0000 | 128,265,950 | 100.00% | 0.00% |
| Feb. 18, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | F | Common Stock | 903 | $98.95 | 37,507.0000 | 128,265,950 | 2.35% | 0.00% |
| Feb. 17, 2026 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | M | Common Stock | 3478 | $0.00 | 38,410.0000 | 128,265,950 | 9.96% | 0.00% |
| April 22, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | P | Common Stock | 83 | $93.39 | 35,015.0000 | 129,206,922 | 0.24% | 0.00% |
| May 27, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM Segment Head | S | Common Stock | 83 | $72.70 | 34,932.0000 | 129,206,922 | 0.24% | 0.00% |
| April 11, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, PEM | A | Restricted Stock Units | 17101 | $0.00 | 17,101.0000 | 129,206,922 | 9999.99% | 0.01% |
| Feb. 21, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | A | Employee Option (right to buy) | 13141 | $0.00 | 13,141.0000 | 129,206,922 | 9999.99% | 0.01% |
| Feb. 20, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | A | Common Stock | 6839 | $0.00 | 37,670.0000 | 129,206,922 | 22.18% | 0.01% |
| Feb. 21, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 2738 | $110.54 | 34,932.0000 | 129,206,922 | 7.27% | 0.00% |
| Feb. 21, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | A | Restricted Stock Units | 4356 | $0.00 | 4,356.0000 | 129,206,922 | 9999.99% | 0.00% |
| Feb. 19, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 3851 | $111.46 | 30,995.0000 | 129,206,922 | 11.05% | 0.00% |
| Feb. 19, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 164 | $112.76 | 30,831.0000 | 129,206,922 | 0.53% | 0.00% |
| Feb. 18, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Restricted Stock Units | 12923 | $0.00 | 0.0000 | 129,206,922 | 100.00% | 0.01% |
| Feb. 18, 2025 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Common Stock | 12923 | $0.00 | 34,846.0000 | 129,206,922 | 58.95% | 0.01% |
| Aug. 13, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Common Stock | 7051 | $0.00 | 24,695.0000 | 128,598,441 | 39.96% | 0.01% |
| Aug. 13, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Restricted Stock Units | 7051 | $0.00 | 0.0000 | 128,598,441 | 100.00% | 0.01% |
| Aug. 14, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 2772 | $145.44 | 21,923.0000 | 128,598,441 | 11.22% | 0.00% |
| May 9, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | S | Common Stock | 3500 | $158.50 | 17,644.0000 | 128,598,441 | 16.55% | 0.00% |
| May 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Common Stock | 3133 | $122.65 | 24,277.0000 | 128,598,441 | 14.82% | 0.00% |
| May 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | D | Common Stock | 3133 | $157.50 | 21,144.0000 | 128,598,441 | 12.91% | 0.00% |
| May 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Employee Option (right to buy) | 3133 | $0.00 | 6,362.0000 | 128,598,441 | 33.00% | 0.00% |
| March 15, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | S | Common Stock | 3878 | $144.50 | 21,144.0000 | 128,598,441 | 15.50% | 0.00% |
| March 13, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | S | Common Stock | 122 | $144.50 | 25,022.0000 | 128,598,441 | 0.49% | 0.00% |
| March 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Employee Option (right to buy) | 5005 | $0.00 | 0.0000 | 128,598,441 | 100.00% | 0.00% |
| March 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Common Stock | 7665 | $108.12 | 37,814.0000 | 128,598,441 | 25.42% | 0.01% |
| March 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Common Stock | 5005 | $86.54 | 30,149.0000 | 128,598,441 | 19.91% | 0.00% |
| March 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | D | Common Stock | 12670 | $142.55 | 25,144.0000 | 128,598,441 | 33.51% | 0.01% |
| March 7, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Employee Option (right to buy) | 7665 | $0.00 | 3,950.0000 | 128,598,441 | 65.99% | 0.01% |
| Feb. 16, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | A | Common Stock | 8592 | $0.00 | 25,346.0000 | 128,598,441 | 51.28% | 0.01% |
| Feb. 20, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 4083 | $129.92 | 25,546.0000 | 128,598,441 | 13.78% | 0.00% |
| Feb. 20, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 3 | $135.32 | 25,543.0000 | 128,598,441 | 0.01% | 0.00% |
| Feb. 20, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | F | Common Stock | 399 | $137.38 | 25,144.0000 | 128,598,441 | 1.56% | 0.00% |
| Feb. 19, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Restricted Stock Units | 4283 | $0.00 | 0.0000 | 128,598,441 | 100.00% | 0.00% |
| Feb. 19, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | EVP, HIP, IT & Digital | M | Common Stock | 4283 | $0.00 | 29,629.0000 | 128,598,441 | 16.90% | 0.00% |
| Feb. 16, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | SVP, Ops - PEM & Corp Logistic | A | Restricted Stock Units | 3073 | $0.00 | 3,073.0000 | 128,598,441 | 9999.99% | 0.00% |
| Feb. 16, 2024 | WESTLAKE CORP | $WLK | Buesinger Robert F. | SVP, Ops - PEM & Corp Logistic | A | Employee Option (right to buy) | 8509 | $0.00 | 8,509.0000 | 128,598,441 | 9999.99% | 0.01% |