| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| PETRILLO LOUIS T | Officer of Subsidiary | ARCH CAPITAL SERVICES LLC, 360 HAMILTON AVENUE, SUITE 600, WHITE PLAINS | /s/ Louis Petrillo | 02 Mar 2026 | 0001227095 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ACGL | Common Shares, $.0011 par value per share | Tax liability | $31,247 | -312 | -0.2% | $100.15 | 156,631 | 27 Feb 2026 | Direct | |
| holding | ACGL | Common Shares, $.0011 par value per share | 100 | 27 Feb 2026 | By Household | F1 |
| Id | Content |
|---|---|
| F1 | These shares are owned by the reporting person's step sons, who share the reporting person's household. |