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WLK • CIK 0001262823
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People and entities that have reported ownership via Form 3, 3/A, 4, 4/A, 5, 5/A
Parsed transactions from Form 4 (and 3/5) filings (past year)
0 transactions · 0 shares
— total value
3 transactions · 40.84K shares
$3.00M total value
10 transactions · 101.64K shares
| Filing Date | Insiders | Transactions | Filing |
|---|---|---|---|
| Sep 1, 2026 | Darby Tommy | Grant/Award: 1.79K shares | View |
| Aug 17, 2026 | Sheets Jeffrey Wayne | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | Sabat Carolyn Chao | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | Patel Bhavesh V. | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | NORTHCUTT R BRUCE | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | MCCOLLUM MARK A | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | Lubel Kimberly S | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | Graff Michael J | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | CREGG ROGER A | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | Chao David Tsung-Hung | Grant/Award: 2.18K shares | View |
| Aug 17, 2026 | Chao Catherine T. | Grant/Award: 2.18K shares | View |
| Aug 10, 2026 | MCCOLLUM MARK A | Exercised 2.17K options | View |
| Aug 10, 2026 | CREGG ROGER A | Exercised 2.17K options | View |
| Feb 24, 2026 | — | — | View |
| Feb 23, 2026 | Szwejbka Scott Thomas | Grant/Award: 365 shares Tax Withholding: 91 @ $94.10 ($8.56K) | View |
| Feb 23, 2026 | Holy Jeffrey Adam | Grant/Award: 264 shares Tax Withholding: 81 @ $94.10 ($7.62K) | View |
| Feb 23, 2026 | — | — | View |
| Feb 23, 2026 | Ederington L. Benjamin | Grant/Award: 1.43K shares Tax Withholding: 357 @ $94.102 ($33.59K) | View |
| Feb 23, 2026 | Buesinger Robert F. | Grant/Award: 1.30K shares Tax Withholding: 326 @ $94.101 ($30.68K) | View |
| Feb 23, 2026 | Bender Mark Steven | Grant/Award: 1.78K shares Tax Withholding: 445 @ $94.099 ($41.87K) | View |
| Feb 23, 2026 | Chao John Tsung-chen | Grant/Award: 213 shares Tax Withholding: 91 @ $94.10 ($8.56K) | View |
| Feb 23, 2026 | Chao James | Grant/Award: 3.88K shares Tax Withholding: 1.57K @ $94.101 ($147.64K) | View |
| Feb 19, 2026 | Szwejbka Scott Thomas | Exercised 977 options Tax Withholding: 295 @ $98.95 ($29.19K) | View |
| Feb 19, 2026 | Holy Jeffrey Adam | Exercised 706 options Tax Withholding: 213 @ $98.95 ($21.08K) | View |
| Feb 19, 2026 | Ederington L. Benjamin | Exercised 3.81K options Tax Withholding: 978 @ $98.95 ($96.77K) | View |
| Feb 19, 2026 | Chao John Tsung-chen | Exercised 570 options Tax Withholding: 242 @ $98.95 ($23.95K) | View |
| Feb 19, 2026 | Buesinger Robert F. | Exercised 3.48K options Tax Withholding: 903 @ $98.95 ($89.35K) | View |
| Feb 19, 2026 | Bender Mark Steven | Exercised 4.75K options Tax Withholding: 1.21K @ $98.95 ($119.63K) | View |
| Dec 23, 2025 | Chao Albert | Exercised 81.67K options @ $44.42/share; sold 40.84K @ $73.5717/share ($3.00M) | View |
| Dec 10, 2025 | CREGG ROGER A | Exercised 1.34K options | View |