Kastner Janeen B. 4

What Happened
Janeen B. Kastner, Vice President — Corporate Benefits & Risk Management at RPM International (RPM), exercised stock-based awards for 30,000 shares on April 17, 2026 (acquired at $50.99/share; total cost $1,529,700). On the same day she disposed of 13,931 shares to the issuer at $109.81/share for $1,529,763 and surrendered 5,452 shares for tax withholding at $109.81/share (value $598,684). The filing also shows a related derivative disposition for 30,000 shares at $0.00, reflecting the mechanics of the award exercise/settlement.

Key Details

• Transaction date: April 17, 2026. Filing date: April 21, 2026 (filed within the typical two-business-day window).
• Exercise (code M): 30,000 shares acquired @ $50.99 = $1,529,700.
• Disposition to issuer (code D): 13,931 shares sold @ $109.81 = $1,529,763.
• Tax withholding (code F): 5,452 shares surrendered @ $109.81 = $598,684.
• Shares owned after transaction: total post-transaction holdings are not stated as a single number in the filing; footnotes list holdings components (see below).
• Footnotes: F1 notes 401(k) account holdings with Fidelity Trust Management Co.; F2 breaks down restricted and performance shares (7,837 unvested restricted, 16,121 vested restricted held in escrow until retirement, and 5,540 performance-earned shares). F3/F4 note Stock Appreciation Rights vesting history and that SARs were granted under Rule 16b-3 with standard vesting and 10-year expirations.

Context
This appears to be a cashless-style exercise/settlement: the insider exercised awards and a portion of the resulting shares were sold or withheld to cover the exercise cost and tax obligations. Transaction codes: M = exercise/conversion of derivative, D = disposition to issuer, F = payment of exercise price or tax liability. These types of sell-to-cover transactions are common and do not necessarily indicate a directional view on the company stock.