Exhibit 21

SUBSIDIARIES OF REGISTRANT

Name	Jurisdiction of Incorporation
Alternative Re Holdings Ltd.	Bermuda
Alternative Re Limited	Bermuda
Alternative Underwriting Services, Ltd.	Bermuda
Alwyn Insurance Company Limited	Gibraltar
Arch Capital Group (U.S.) Inc.	Delaware
Arch Capital Holdings Ltd.	Bermuda
Arch Capital Services Inc.	Delaware
Arch Capital UK Ltd.	United Kingdom
Arch Europe Insurance Services Ltd.	United Kingdom
Arch Excess & Surplus Insurance Company	Nebraska
Arch Financial Holdings B.V.	Netherlands
Arch Financial Holdings Europe I Limited	Ireland
Arch Financial Holdings Europe II Limited	Ireland
Arch Indemnity Insurance Company	Nebraska
Arch Insurance Canada Ltd.	Canada
Arch Insurance Company	Missouri
Arch Insurance Company (Europe) Limited	United Kingdom
Arch Insurance Group Inc.	Delaware
Arch International Services Inc.	Delaware
Arch Investments I LLC	Delaware
Arch Investment Holdings I Ltd.	Bermuda
Arch Investments Holdings II Ltd.	Bermuda

Arch Investment Holdings III Ltd.	Bermuda
Arch Investment Holdings IV Ltd.	Bermuda
Arch Investment Management Ltd.	Bermuda
Arch Mortgage Insurance Limited	Ireland
Arch Re Accident & Health ApS	Denmark
Arch Re Facultative Underwriters Inc.	Delaware
Arch Reinsurance Company	Nebraska
Arch Reinsurance Europe Underwriting Limited	Ireland
Arch Reinsurance Ltd.	Bermuda
Arch Risk Partners Ltd.	United Kingdom
Arch Risk Transfer Services Ltd.	Bermuda
Arch Specialty Insurance Agency Inc.	Missouri
Arch Specialty Insurance Company	Nebraska
Arch Syndicate Investments Ltd.	United Kingdom
Arch Underwriting Agency LLC	Delaware
Arch Underwriting at Lloyd’s Ltd.	United Kingdom
Arch Underwriting at Lloyd’s (Australia) Pty Ltd.	Australia
Arch Underwriting Managers at Lloyd’s (South Africa) (Pty) Limited	Republic of South Africa
First American Services Corporation	Missouri
Insurance Technology Services Inc.	Philippines