PETRILLO LOUIS T 4

What Happened

• Louis T. Petrillo, an officer of an Arch Capital subsidiary, had 312 shares withheld on February 27, 2026 to satisfy a tax liability related to an option exercise. The shares were valued at $100.15 each for a total of approximately $31,247. This was a tax-withholding disposition (Form 4 code F), not an open-market sale.

Key Details

• Transaction date: 2026-02-27
• Transaction type/code: Payment of exercise price or tax liability (F) — shares disposed/withheld
• Shares withheld: 312 at $100.15 per share; total value ≈ $31,247
• Shares owned after transaction: not specified in the provided filing
• Filing date: 2026-03-02 (reported on Form 4)
• Footnote: The shares withheld are owned by the reporting person's step sons, who share the reporting person's household

Context

• Code F transactions are typically tax-withholding or exercise-price payments tied to option exercises; withheld shares are an administrative action to meet tax obligations rather than an open-market sale. Such disposals are generally routine and should not be read as a direct buy/sell signal about the company's outlook.