| 2026-02-27 | FULL NAME OF SUBSIDIARY | PLACE OF INCORPORATION |
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| 2026-02-27 | ARK INSURANCE HOLDINGS LIMITED | BERMUDA |
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| 2026-02-27 | GROUP ARK INSURANCE HOLDINGS LIMITED | BERMUDA |
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| 2026-02-27 | GROUP ARK INSURANCE LIMITED | BERMUDA |
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| 2026-02-27 | HG GLOBAL LTD | BERMUDA |
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| 2026-02-27 | HG HOLDINGS LTD | BERMUDA |
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| 2026-02-27 | HG RE LTD | BERMUDA |
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| 2026-02-27 | HG SERVICES LTD | BERMUDA |
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| 2026-02-27 | PSC HOLDINGS LTD. | BERMUDA |
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| 2026-02-27 | WHITE MOUNTAINS HOLDINGS LTD | BERMUDA |
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| 2026-02-27 | WHITE MOUNTAINS INVESTMENTS (BERMUDA) LTD. | BERMUDA |
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| 2026-02-27 | WM HINSON (BERMUDA) LTD | BERMUDA |
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| 2026-02-27 | WM PAGET (BERMUDA) LTD | BERMUDA |
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| 2026-02-27 | AFSF V AIV PHOENIX AGGREGATOR LP | DELAWARE, USA |
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| 2026-02-27 | COPPER FUNDING, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED CAPITAL, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED GROUP, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED PRIZE INDEMNITY, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED PROGRAMS INS BROKERAGE, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED PROGRAMS, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED PROGRAMS RISK MANAGEMENT, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED SPECIALTY INS. BROKERAGE, LLC | DELAWARE, USA |
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| 2026-02-27 | DISTINGUISHED SPECIALTY RISK MANAGEMENT, LLC | DELAWARE, USA |
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| 2026-02-27 | DP D&O MANAGEMENT , LLC | DELAWARE, USA |
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| 2026-02-27 | DP FINE ART AND COLLECTIBLES, LLC | DELAWARE, USA |
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| 2026-02-27 | DP INLAND MARINE MANAGEMENT, LLC | DELAWARE, USA |
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| 2026-02-27 | DP SURETY MANAGEMENT, LLC | DELAWARE, USA |
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| 2026-02-27 | DEPI HOLDINGS, LLC | DELAWARE, USA |
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| 2026-02-27 | IDP HOSPITALITY GROUP, LLC | DELAWARE, USA |
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| 2026-02-27 | IDP HOLDINGS, LLC | DELAWARE, USA |
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| 2026-02-27 | KUDU INVESTMENT HOLDINGS, LLC | DELAWARE, USA |
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| 2026-02-27 | KUDU INVESTMENT MANAGEMENT LLC | DELAWARE, USA |
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| 2026-02-27 | KUDU INVESTMENT US, LLC | DELAWARE, USA |
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| 2026-02-27 | PHOENIX INTERMEDIATE, LLC | DELAWARE, USA |
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| 2026-02-27 | PHOENIX MERGER PARENT, LLC | DELAWARE, USA |
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| 2026-02-27 | TK PARTNERS, LLC | DELAWARE, USA |
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| 2026-02-27 | WHITE MOUNTAINS ADVISORS LLC | DELAWARE, USA |
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| 2026-02-27 | WHITE MOUNTAINS CAPITAL, LLC | DELAWARE, USA |
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| 2026-02-27 | WHITE MOUNTAINS PARTNERS, LLC | DELAWARE, USA |
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| 2026-02-27 | WHITE MOUNTAINS SERVICES LLC | DELAWARE, USA |
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| 2026-02-27 | WM ADAMS HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | WM CLAY HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | WM JEFFERSON HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | WM LAFAYETTE HOLDINGS, LLC | DELAWARE, USA |
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| 2026-02-27 | WM LINCOLN HOLDINGS, LLC | DELAWARE, USA |
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| 2026-02-27 | WM MADISON HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | WM MONROE HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | WM MONROE BLOCKER GP, LLC | DELAWARE, USA |
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| 2026-02-27 | WM MONROE BLOCKER, L.P. | DELAWARE, USA |
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| 2026-02-27 | WM PHOENIX BLOCKER GP, LLC | DELAWARE, USA |
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| 2026-02-27 | WM PHOENIX BLOCKER, L.P. | DELAWARE, USA |
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| 2026-02-27 | WM PHOENIX PARENT, L.P. | DELAWARE, USA |
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| 2026-02-27 | WM PORTFOLIO HOLDINGS, LLC | DELAWARE, USA |
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| 2026-02-27 | WMP INVESTMENTS I, INC | DELAWARE, USA |
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| 2026-02-27 | WM TAYLOR HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | WM WEBSTER HOLDINGS, INC | DELAWARE, USA |
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| 2026-02-27 | TNUVA FINANCIT LTD | ISRAEL |
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| 2026-02-27 | WOBI INSURANCE AGENCY, LTD | ISRAEL |
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| 2026-02-27 | WHITE MOUNTAINS INVESTMENTS (LUXEMBOURG) S.A.R.L | LUXEMBOURG |
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| 2026-02-27 | ENTERPRISE ELECTRIC, LLC | TENNESSEE, USA |
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| 2026-02-27 | ACCIDENT & HEALTH UNDERWRITING LIMITED | UNITED KINGDOM |
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| 2026-02-27 | ACCIDENT & HEALTH CLAIMS LLP | UNITED KINGDOM |
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| 2026-02-27 | ARK CORPORATE MEMBER LIMITED | UNITED KINGDOM |
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| 2026-02-27 | ARK CORPORATE MEMBER NO. 2 LIMITED | UNITED KINGDOM |
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| 2026-02-27 | ARK CORPORATE MEMBER NO. 3 LIMITED | UNITED KINGDOM |
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| 2026-02-27 | ARK CORPORATE MEMBER NO. 4 LIMITED | UNITED KINGDOM |
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| 2026-02-27 | ARK SYNDICATE MANAGEMENT LIMITED | UNITED KINGDOM |
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| 2026-02-27 | KFO HOLDINGS LTD | UNITED KINGDOM |
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| 2026-02-27 | KWCP HOLDINGS UK LTD | UNITED KINGDOM |
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| 2026-02-27 | SYNDICATE ARK 4020 | UNITED KINGDOM |
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| 2026-02-27 | SYNDICATE NOA 3902 | UNITED KINGDOM |
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| 2026-02-27 | WM BIRKDALE LTD | UNITED KINGDOM |
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| 2026-02-27 | WM CAPITAL HOLDINGS LTD | UNITED KINGDOM |
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| 2026-02-27 | WM INTERNATIONAL HOLDINGS LTD | UNITED KINGDOM |
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| 2026-02-27 | WM REGENT, LTD | UNITED KINGDOM |
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| 2026-02-27 | RICHMOND RISK MANAGEMENT, INC | VIRGINIA, USA |
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