EX-21 5 a11-1984_1ex21.htm EX-21

Exhibit 21

SUBSIDIARIES OF THE REGISTRANT

AS OF DECEMBER 31, 2010

FULL NAME OF SUBSIDIARY |  | PLACE OF INCORPORATION
ANSWER FINANCIAL INC. |  | DELAWARE, USA
CENTRAL NATIONAL INSURANCE COMPANY OF OMAHA |  | NEBRASKA, USA
ESURANCE INSURANCE SERVICES, INC. |  | DELAWARE, USA
ESURANCE HOLDINGS BERMUDA LTD. |  | BERMUDA
ESURANCE HOLDINGS INC. |  | DELAWARE, USA
ESURANCE INSURANCE COMPANY |  | WISCONSIN, USA
WHITE MOUNTAINS HOLDING COMPANY, INC. |  | NEW YORK, USA
WHITE MOUNTAINS REINSURANCE COMPANY OF AMERICA |  | NEW YORK, USA
FUND AMERICAN HOLDINGS AB |  | SWEDEN
GUILFORD HOLDINGS, INC. |  | DELAWARE, USA
HOMELAND INSURANCE COMPANY OF NEW YORK |  | NEW YORK, USA
INSURANCE ANSWER CENTER, LLC |  | DELAWARE, USA
LONE TREE HOLDINGS LTD. |  | BERMUDA
LONE TREE INSURANCE GROUP LTD. |  | BERMUDA
MILL SHARES HOLDINGS BERMUDA LIMITED |  | BERMUDA
MORTGAGE ANSWER CENTER, INC. |  | DELAWARE, USA
ONEBEACON U.S. ENTERPRISES HOLDINGS, INC. |  | DELAWARE, USA
ONEBEACON U.S. FINANCIAL SERVICES, INC. |  | DELAWARE, USA
ONEBEACON U.S. HOLDINGS, INC. |  | DELAWARE, USA
ONEBEACON AMERICA INSURANCE COMPANY |  | MASSACHUSETTS, USA
ONEBEACON HOLDINGS (GIBRALTAR) LIMITED |  | GIBRALTAR
ONEBEACON HOLDINGS (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
ONEBEACON INSURANCE COMPANY |  | PENNSYLVANIA, USA
ONEBEACON INSURANCE GROUP LLC |  | DELAWARE, USA
ONEBEACON INSURANCE GROUP LTD. |  | BERMUDA
ONEBEACON INVESTMENT (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
PSC HOLDINGS LTD. |  | BERMUDA
PENNSYLVANIA GENERAL INSURANCE COMPANY |  | PENNSYLVANIA, USA
SCANDINAVIAN REINSURANCE COMPANY LTD. |  | BERMUDA
SIRIUS INSURANCE HOLDING SWEDEN AB |  | SWEDEN
SIRIUS INTERNATIONAL INSURANCE CORPORATION |  | SWEDEN
THE NORTHERN ASSURANCE COMPANY OF AMERICA |  | MASSACHUSETTS, USA
WHITE MOUNTAINS ADVISORS LLC |  | DELAWARE, USA
WHITE MOUNTAINS HOLDING (NL)B.V. |  | NETHERLANDS
WHITE MOUNTAINS HOLDINGS (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WHITE MOUNTAINS INC. |  | DELAWARE, USA
WHITE MOUNTAINS INTERNATIONAL S.A.R.L. |  | LUXEMBOURG
WHITE MOUNTAINS INVESTMENTS BERMUDA LTD. |  | BERMUDA
WHITE MOUNTAINS LIFE REINSURANCE (BERMUDA) LTD. |  | BERMUDA
WHITE MOUNTAINS RE BERMUDA LTD. |  | BERMUDA
WHITE MOUNTAINS RE FINANCIAL SERVICES LTD. |  | BERMUDA
WHITE MOUNTAINS RE (GIBRALTAR) LIMITED |  | GIBRALTAR
WHITE MOUNTAINS RE GROUP, LTD. |  | BERMUDA
WHITE MOUNTAINS RE HOLDINGS, INC. |  | DELAWARE, USA
WHITE MOUNTAINS RE HOLDINGS, LTD. |  | BERMUDA
WHITE MOUNTAINS RE, LTD. |  | BERMUDA
WHITE MOUNTAINS RE UNDERWRITING SERVICES LTD. |  | BERMUDA
WHITE ROCK HOLDINGS (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WHITE SANDS HOLDINGS (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM ALAMEDA (GIBRALTAR) LIMITED |  | GIBRALTAR
WM BECH (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM BELVAUX (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM CALETA (GIBRALTAR) LIMITED |  | GIBRALTAR
WM CLAY (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM CUMBERLAND (GIBRALTAR) LIMITED |  | GIBRALTAR
WM FINDEL (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM KAOLIN (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM KEHLEN (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM LAGUNA (GIBRALTAR) LIMITED |  | GIBRALTAR

WM LIMESTONE (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM LINGER (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM MERL (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM MONTAGU (GIBRALTAR) LIMITED |  | GIBRALTAR
WM OLM (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM QUEENSWAY (GIBRALTAR) LIMITED |  | GIBRALTAR
WM REULER (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG
WM VIANDEN (LUXEMBOURG) S.A.R.L. |  | LUXEMBOURG

Certain other subsidiaries of the Company have been omitted since, in the aggregate, they would not constitute a significant subsidiary.