Bender Mark Steven, EVP and CFO of Westlake Corp (WLK), sold shares on the open market twice in the last year for a total of $1.76 million. His most recent sale occurred on February 27, 2026. These sales rank 3,742nd among 11,678 individual insiders in our database, where the average is $8.6 million across about 6.4 transactions per insider. He made no open market purchases during this period.
| 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 | Bender Mark Steven | EVP & CFO | S | Common Stock | 16413 | $112.54 | 28,015.0000 | 128,265,950 | 36.94% | 0.01% |
| Feb. 16, 2022 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 1171 | $104.96 | 25,608.0000 | 0 | 4.37% | 0.00% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Common Stock | 6494 | $86.54 | 74,535.0000 | 128,265,950 | 9.54% | 0.01% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | D | Common Stock | 12693 | $98.20 | 61,842.0000 | 128,265,950 | 17.03% | 0.01% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Employee Option (right to buy) | 6494 | $0.00 | 0.0000 | 128,265,950 | 100.00% | 0.01% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Employee Option (right to buy) | 6199 | $0.00 | 0.0000 | 128,265,950 | 100.00% | 0.00% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | S | Common Stock | 16988 | $100.91 | 44,854.0000 | 128,265,950 | 27.47% | 0.01% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | S | Common Stock | 421 | $101.52 | 44,433.0000 | 128,265,950 | 0.94% | 0.00% |
| Feb. 27, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Common Stock | 6199 | $65.81 | 68,041.0000 | 128,265,950 | 10.02% | 0.00% |
| Feb. 20, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 445 | $94.10 | 61,842.0000 | 128,265,950 | 0.71% | 0.00% |
| Feb. 20, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Restricted Stock Units | 7747 | $0.00 | 7,747.0000 | 128,265,950 | 9999.99% | 0.01% |
| Feb. 20, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Employee Option (right to buy) | 28389 | $0.00 | 28,389.0000 | 128,265,950 | 9999.99% | 0.02% |
| Feb. 19, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Common Stock | 1777 | $0.00 | 62,287.0000 | 128,265,950 | 2.94% | 0.00% |
| Feb. 17, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Common Stock | 4751 | $0.00 | 61,719.0000 | 128,265,950 | 8.34% | 0.00% |
| Feb. 18, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 1209 | $98.95 | 60,510.0000 | 128,265,950 | 1.96% | 0.00% |
| Feb. 17, 2026 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Restricted Stock Units | 4751 | $0.00 | 0.0000 | 128,265,950 | 100.00% | 0.00% |
| Feb. 20, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Common Stock | 8819 | $0.00 | 60,498.0000 | 129,206,922 | 17.06% | 0.01% |
| Feb. 21, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 3530 | $110.54 | 56,968.0000 | 129,206,922 | 5.83% | 0.00% |
| Feb. 21, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Employee Option (right to buy) | 19279 | $0.00 | 19,279.0000 | 129,206,922 | 9999.99% | 0.01% |
| Feb. 21, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Restricted Stock Units | 6391 | $0.00 | 6,391.0000 | 129,206,922 | 9999.99% | 0.00% |
| Feb. 18, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Restricted Stock Units | 13987 | $0.00 | 0.0000 | 129,206,922 | 100.00% | 0.01% |
| Feb. 18, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Common Stock | 13987 | $0.00 | 56,125.0000 | 129,206,922 | 33.19% | 0.01% |
| Feb. 19, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 4264 | $111.46 | 51,861.0000 | 129,206,922 | 7.60% | 0.00% |
| Feb. 19, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 50 | $112.46 | 51,811.0000 | 129,206,922 | 0.10% | 0.00% |
| Feb. 19, 2025 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 132 | $112.76 | 51,679.0000 | 129,206,922 | 0.25% | 0.00% |
| Aug. 14, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 1156 | $145.44 | 42,138.0000 | 128,598,441 | 2.67% | 0.00% |
| Aug. 13, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Common Stock | 2938 | $0.00 | 43,294.0000 | 128,598,441 | 7.28% | 0.00% |
| Aug. 13, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Restricted Stock Units | 2938 | $0.00 | 0.0000 | 128,598,441 | 100.00% | 0.00% |
| May 3, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | S | Common Stock | 4950 | $152.19 | 40,356.0000 | 128,598,441 | 10.93% | 0.00% |
| March 6, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | S | Common Stock | 4804 | $141.02 | 45,306.0000 | 128,598,441 | 9.59% | 0.00% |
| Feb. 26, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | S | Common Stock | 4854 | $137.57 | 50,110.0000 | 128,598,441 | 8.83% | 0.00% |
| Feb. 19, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Common Stock | 5558 | $0.00 | 61,108.0000 | 128,598,441 | 10.01% | 0.00% |
| Feb. 20, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 5597 | $129.92 | 55,511.0000 | 128,598,441 | 9.16% | 0.00% |
| Feb. 20, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | F | Common Stock | 547 | $138.68 | 54,964.0000 | 128,598,441 | 0.99% | 0.00% |
| Feb. 16, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Common Stock | 11150 | $0.00 | 55,550.0000 | 128,598,441 | 25.11% | 0.01% |
| Feb. 19, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | M | Restricted Stock Units | 5558 | $0.00 | 0.0000 | 128,598,441 | 100.00% | 0.00% |
| Feb. 16, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Restricted Stock Units | 4459 | $0.00 | 4,459.0000 | 128,598,441 | 9999.99% | 0.00% |
| Feb. 16, 2024 | WESTLAKE CORP | $WLK | Bender Mark Steven | EVP & CFO | A | Employee Option (right to buy) | 12344 | $0.00 | 12,344.0000 | 128,598,441 | 9999.99% | 0.01% |