Gilson Jean-Marc 4

What Happened

• Jean‑Marc Gilson, President and CEO of Westlake Corp (WLK), received equity awards on February 20, 2026 totaling 138,923 units: 109,139 stock options (derivative) and 29,784 restricted stock units (RSUs). Both awards were granted with an exercise/grant price of $0.00, so there was no cash paid by the insider at grant.

Key Details

• Transaction date: 2026-02-20; Filing date: 2026-02-23 (timely).
• Options: 109,139 granted at $0.00 (derivative). Vesting/exercise schedule: exercisable in three installments of 33%, 33% and 34% on Feb 20, 2027, 2028 and 2029 (Footnote F1).
• RSUs: 29,784 RSUs granted; each RSU converts to one share upon vesting. All RSUs vest on Feb 20, 2029 (Footnotes F2, F3).
• Shares owned after transaction: not disclosed in the Form 4 filing.
• Transaction type code: A = award/grant (not a purchase or sale).

Context

• These awards are compensation grants, not open‑market purchases or sales. RSUs represent a contingent right to receive shares at vesting (multi‑year retention), and the options provide the right to acquire shares according to the stated vesting/exercise schedule. Such grants are common executive compensation and do not by themselves signal immediate buying or selling of stock.