EX-21 6 wtm10-k123115ex21.htm EXHIBIT 21
Exhibit 21
SUBSIDIARIES OF THE REGISTRANT
AS OF DECEMBER 31, 2015

FULL NAME OF SUBSIDIARY | PLACE OF INCORPORATION
SIRIUS INTERNATIONAL HOLDING COMPANY, INC. | NEW YORK, USA
SIRIUS AMERICA INSURANCE COMPANY | NEW YORK, USA
FUND AMERICAN HOLDINGS AB | SWEDEN
GUILFORD HOLDINGS, INC. | DELAWARE, USA
HOMELAND INSURANCE COMPANY OF DELAWARE | DELWARE, USA
LONE TREE HOLDINGS LTD. | BERMUDA
MILL SHARES HOLDINGS BERMUDA LIMITED | BERMUDA
ONEBEACON U.S. ENTERPRISES HOLDINGS, INC. | DELAWARE, USA
ONEBEACON U.S. FINANCIAL SERVICES, INC. | DELAWARE, USA
ONEBEACON U.S. HOLDINGS, INC. | DELAWARE, USA
ONEBEACON HOLDINGS (GIBRALTAR) LIMITED | GIBRALTAR
S.I. HOLDINGS (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
ATLANTIC SPECIALTY INSURANCE COMPANY | NEW YORK, USA
ONEBEACON INSURANCE GROUP LLC | DELAWARE, USA
ONEBEACON INSURANCE GROUP LTD. | BERMUDA
ONEBEACON INVESTMENTS (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
PSC HOLDINGS LTD. | BERMUDA
SIRIUS INSURANCE HOLDING SWEDEN AB | SWEDEN
SIRIUS INTERNATIONAL INSURANCE CORPORATION | SWEDEN
WHITE MOUNTAINS ADVISORS LLC | DELAWARE, USA
SIRIUS GROUP HOLDINGS (NL)B.V. | NETHERLANDS
WHITE MOUNTAINS HOLDINGS (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
SIRIUS GROUP INTERNATIONAL S.A.R.L. | LUXEMBOURG
WHITE MOUNTAINS INVESTMENTS BERMUDA LTD. | BERMUDA
WHITE MOUNTAINS LIFE REINSURANCE (BERMUDA) LTD. | BERMUDA
SIRIUS BERMUDA INSURANCE COMPANY LTD. | BERMUDA
SIRIUS INTERNATIONAL GROUP, LTD. | BERMUDA
SIRIUS RE HOLDINGS, INC. | DELAWARE, USA
SIRIUS INTERNATIONAL HOLDINGS, LTD. | BERMUDA
SIRIUS INTERNATIONAL INSURANCE GROUP, LTD. | BERMUDA
SIRIUS GROUP HOLDINGS (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WHITE SANDS HOLDINGS (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WM ALAMEDA (GIBRALTAR) LIMITED | GIBRALTAR
WM BELVAUX (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
SI CALETA (GIBRALTAR) LIMITED | GIBRALTAR
SI CUMBERLAND (GIBRALTAR) LIMITED | GIBRALTAR
WM FINDEL (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WM KEHLEN (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
SI LIMESTONE (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WM LINGER (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WM MERL (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WM OLM (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WM QUEENSWAY (GIBRALTAR) LIMITED | GIBRALTAR
SI VIANDEN (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
SI PHOENIX (LUXEMBOURG) S.A.R.L. | LUXEMBOURG
WHITE SHOALS RE LTD. | BERMUDA
SIRIUS INTERNATIONAL CORPORATE MEMBER LIMITED | UNITED KINGDOM
SIRIUS RE UNDERWRITING SERVICES AMERICA LLC. | NEW YORK, USA

SIRIUS GLOBAL SERVICES LLC. | DELAWARE, USA
SIRIUS GLOBAL SOLUTIONS HOLDINGS COMPANY | CONNECTICUT, USA
SIRIUS GLOBAL SOLUTIONS INC | CONNECTICUT, USA
SIRIUS INTERNATIONAL HOLDINGS (NL)B.V. | NETHERLANDS
STAR RE LTD | BERMUDA
BRIDGE HOLDINGS (BERMUDA) LTD | BERMUDA
WHITE MOUNTAINS CAPITAL, INC | DELAWARE, USA
WHITE MOUNTAINS FINANCIAL SERVICES LLC | DELAWARE, USA
WHITE MOUNTAINS SERVICES LLC | DELAWARE, USA
ONEBEACON SERVICES LLC | DELAWARE, USA
SYA INSURANCE HOLDINGS (NL)B.V. | NETHERLANDS
HG GLOBAL LTD | BERMUDA
HG HOLDINGS LTD | BERMUDA
HG SERVICES LTD | BERMUDA
HG RE LTD | BERMUDA
HG (GIBRALTAR) LIMITED | GIBRALTAR
HGR (GIBRALTAR) LIMITED | GIBRALTAR
HG ROOSEVELT (LUXEMBOURG) S.A.R.L | LUXEMBOURG
HGR PATTON (LUXEMBOURG) S.A.R.L | LUXEMBOURG
WHITE MOUNTAINS INVESTMENTS (LUXEMBOURG) S.A.R.L | LUXEMBOURG
TLP HOLDINGS (GIBRALTAR) LIMITED | GIBRALTAR
TLP HOLDINGS (LUXEMBOURG) S.A.R.L | LUXEMBOURG
OAKWOOD INSURANCE COMPANY | TENNESSEE, USA
EMPIRE INSURANCE COMPANY | NEW YORK, USA
ASHMERE INSURANCE COMPANY | ILLINOIS, USA
ALSTEAD REINSURANCE LTD | BERMUDA
WOBI INSURANCE AGENCY, LTD | ISRAEL
TRANZACT HOLDINGS LLC | DELAWARE, USA
QL HOLDINGS LLC | DELAWARE, USA
QUOTELAB, LLC | DELAWARE, USA
MEDIAALPHA VENTURES LLC | DELAWARE, USA
ABIAKA HOLDINGS LLC | DELAWARE, USA
STAR & SHIELD SERVICES LLC | DELAWARE, USA
STAR & SHIELD RISK MANAGEMENT LLC | FLORIDA, USA
STAR & SHIELD CLAIMS SERVICES LLC | FLORIDA, USA
WTM (BARBADOS) INTERNATIONAL SRL | BARBADOS
OB (BARBADOS) INTERNATIONAL SRL | BARBADOS
GRAND MARAIS CAPITAL LIMITED | UNITED KINGDOM
SPLIT ROCK INSURANCE, LTD | BERMUDA
TNUVA FINANCIT LTD | ISRAEL
TRAZUTARY HOLDINGS LLC | DELAWARE, USA

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