ARCH CAPITAL GROUP LTD. — Director's Dealing 2026

Feb 26, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ARCH CAPITAL GROUP LTD. (ACGL)
CIK: 0000947484
Period of Report: 2026-02-24

Reporting Person: PETRILLO LOUIS T (Officer of Subsidiary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-24	Common Shares, $.0011 par value per share	F	412	$99.18	Disposed	139807	Direct
2026-02-24	Common Shares, $.0011 par value per share	A	17136	—	Acquired	156943	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Shares, $.0011 par value per share	100	Indirect

Footnotes

F1: Amount includes 248 Common Shares acquired on May 30, 2025 under the Arch Capital Group Ltd. Employee Share Purchase Plan.

F2: These shares are owned by the reporting person's step sons, who share the reporting person's household.