Chao John Tsung-chen 4

What Happened
John Tsung‑chen Chao, a director of Westlake Corp (WLK), had performance stock units (PSUs) vest and received several derivative equity awards. On Feb 19, 2026, 213 PSUs vested. To cover tax obligations arising from that vesting, 91 shares were withheld/disposed on Feb 20, 2026 at $94.10 per share for proceeds of $8,563. Separately on Feb 20, 2026 the filing shows additional equity awards/derivative grants of 4,044, 1,104 and 2,434 units (awarded at $0).

Key Details

• Transaction dates: PSUs vested 2026-02-19; tax-withholding / share disposition and additional awards reported 2026-02-20. Form filed 2026-02-23 (timely).
• Sale/withholding: 91 shares withheld/disposed at $94.10 each = $8,563.
• Vested award: 213 PSUs vested (per footnote F1). Shares otherwise issuable from that vesting were withheld to satisfy taxes (F2).
• Additional awards (derivative): 4,044; 1,104; and 2,434 units granted on 2026-02-20 (awarded at $0). Footnotes indicate some awards are RSUs (each RSU = 1 share) that vest on 2029-02-20 (F4, F5), and some awards/options have staged exercisability (F3).
• Shares owned after the transactions: not specified in the provided filing summary.
• Filing timeliness: Form 4 filed 2026-02-23 — within the required reporting window (timely).

Context

• The 91-share disposition is a routine tax-withholding event tied to PSU vesting (not a typical open-market sale indicating a change in sentiment).
• The filing shows both vested PSUs and newly granted derivative awards (RSUs/options) with future vesting/exercise schedules; RSUs generally convert to shares only upon vesting (here, many RSUs vest in 2029).
• For retail investors, awards and withholding are common compensation mechanics; purchases are generally more indicative of bullish insider conviction than routine vesting/withholding.