Kastner Janeen B. 4

What Happened Janeen B. Kastner, Vice President, Corporate Benefits & Risk Management at RPM International (RPM), disposed of 1,137 shares of common stock on July 19, 2026. The shares were surrendered back to the issuer at $105.08 per share to satisfy tax obligations tied to vested performance stock units, resulting in a value of approximately $119,476. This was a tax-withholding/cashless disposition (transaction code F), not an open-market sale.

Key Details

• Transaction date: July 19, 2026; filing date: July 21, 2026 (timely within the Form 4 reporting window).
• Shares disposed: 1,137 at $105.08 each; total ≈ $119,476.
• Reason: Shares were withheld/disposed to satisfy taxes on vested Performance Stock Units granted in 2023 (Footnote F1).
• Reported holdings after transaction: the filing does not state a single total beneficial-ownership figure. Footnotes note 7,168 unvested restricted shares and 4,040 performance-earned restricted shares, plus additional holdings in a 401(k) account (Footnotes F2–F3).
• Other footnotes: Form notes outstanding Stock Appreciation Rights granted under the plan (vesting schedule and expirations) (F5). F4 indicates some prior holdings/transactions reported on earlier forms.

Context This was a routine tax-withholding disposition associated with vested equity (a common administrative action when awards vest). It should not be interpreted as a deliberate market sale signaling a change in insider sentiment. Transaction code F denotes shares surrendered or withheld to cover taxes rather than an open-market sale.