Bender Mark Steven 4

What Happened

• Mark Steven Bender, EVP & CFO of Westlake Corp (WLK), exercised stock options for 12,693 shares and sold a total of 30,102 shares on February 27, 2026. He paid approximately $969,949 to exercise (two option lots at $65.81 and $86.54) and received roughly $3,003,450 from sales (including a disposition to the issuer and open-market sales).
• Breakdown: exercised 6,199 shares at $65.81 ($407,972) and 6,494 shares at $86.54 ($561,977); disposition to issuer 12,693 shares at $98.20 ($1,246,453); open-market sales 16,988 shares at a weighted avg ~$100.91 ($1,714,259) and 421 shares at $101.52 ($42,738). Two derivative-line entries at $0.00 reflect conversion/cancellation of the option instruments.

Key Details

• Transaction date: 2026-02-27; Form 4 filed 2026-03-02 (timely filing).
• Options exercised: 12,693 shares (payments totaling ~$969,949).
• Shares sold: 30,102 total; sale proceeds ≈ $3,003,450.
• Sale price range (open-market): $100.38–$101.36 per footnote (weighted average noted).
• Vesting notes: the exercised options vest in installments (see footnotes F2 and F3 for original vesting schedule).
• Shares owned after the transactions: not specified in the details provided here (see the filed Form 4 for total beneficial ownership).

Context

• This was effectively an exercise-plus-sale activity: shares were exercised (derivative conversion) and many of the resulting shares were surrendered/ sold — including a disposition to the issuer (commonly used to cover exercise cost and taxes) plus additional open-market sales. That pattern is a routine liquidity/cashless exercise for executives and does not, by itself, indicate a change in company outlook.
• The filing is not marked late; the Form 4 was submitted within required reporting time.