Buesinger Robert F. 4

What Happened

• Robert F. Buesinger, EVP and PEM Segment Head at Westlake Corp (WLK), had performance stock units (PSUs) vest and sold shares to cover taxes, while also receiving new derivative awards. Specifically, 1,301 shares vested on Feb 19, 2026 (PSUs). On Feb 20, 2026 he disposed of 326 shares (tax withholding/sale) producing proceeds of $30,677 (weighted average price $94.10; sale prices ranged $94.10–$94.29). On Feb 20, 2026 he was also granted derivative awards totaling 24,632 shares (19,351 + 5,281) as new long‑term equity incentives (awarded at $0.00).

Key Details

• Transaction dates: PSUs vested 2026-02-19; tax‑withholding sale and new awards on 2026-02-20. Form 4 filed 2026-02-23 (timely).
• Sale details: 326 shares sold to satisfy tax withholding; weighted average price $94.10; sales occurred at prices between $94.10 and $94.29; proceeds ≈ $30,677.
• Grants: Two derivative awards granted 2026-02-20 totaling 24,632 shares (19,351 and 5,281). These are compensatory awards (stock options and/or RSUs) issued at $0.00.
• Vesting/exercise notes: The filing indicates stock options (if applicable) are exercisable in three installments (Feb 20, 2027; Feb 20, 2028; Feb 20, 2029). The RSUs (each convertible to one share) vest on Feb 20, 2029.
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Filing timeliness: Report filed Feb 23, 2026 for transactions through Feb 20, 2026—within the Form 4 timing requirements (timely).

Context

• The 326‑share sale was to satisfy tax withholding on vested PSUs (routine corporate practice) and does not necessarily signal a trading view. The larger new awards are long‑term compensation: RSUs convert to shares at vesting and stock options (if part of the grant) become exercisable over 2027–2029, indicating retention/longer‑term alignment rather than immediate market exposure.