Bender Mark Steven 4

What Happened
Mark Steven Bender, EVP & CFO of Westlake Corp (WLK), had 13,164 restricted stock units (RSUs) convert into common shares on May 12, 2026. To cover tax obligations, 5,284 of those shares were withheld (disposed) at $97.34 per share for a withholding value of $514,345. The vesting left Bender with approximately 7,880 net shares (13,164 − 5,284), worth roughly $767,039 at the same $97.34 price.

Key Details

• Transaction dates: RSU conversion/vesting on 2026-05-12; tax withholding recorded 2026-05-13.
• Prices and values: withholding price $97.34; 5,284 shares withheld = $514,345. Net shares ≈7,880 (approx. $767k at $97.34).
• Transaction codes: M = conversion of derivative (RSU vesting); F = shares withheld to pay tax liability.
• Footnotes: RSUs convert one-for-one; the RSUs were granted on May 12, 2023 and vested on the third anniversary (May 12, 2026). Shares were withheld to satisfy tax obligations (cashless withholding).
• Filing: Form 4 filed 2026-05-14 for a 2026-05-12 vesting—appears timely based on the filing date.
• Shares owned after transaction: not specified in the provided excerpt of the filing.

Context
This was an RSU vesting event with routine tax withholding, not an open-market sale or purchase. For retail investors, vesting and withholding are administrative — they do not necessarily signal the insider’s view on the stock. The M code indicates conversion of the award into shares; the F code indicates shares were surrendered to cover taxes.