Exhibit 21 SUBSIDIARIES OF NAC Re CORP. Jurisdiction Name of Incorporation - ---- ---------------- NAC Reinsurance Corporation New York - Greenwich Insurance Company California - Indian Harbor Insurance Company North Dakota - NAC Re International Holdings Limited United Kingdom -- NAC Re International Services Company Limited United Kingdom -- NAC Reinsurance International Limited United Kingdom -- Stonebridge Underwriting, Ltd. United Kingdom NAC Re Financial Services, Inc. Delaware