UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F INFORMATION REQUIRED OF INSTITUTIONAL INVESTMENT MANAGERS PURSUANT TO SECTION 13(f) OF THE SECURITIES EXCHANGE ACT OF 1934 AND RULES THEREUNDER Report for the Calendar Year or Quarter Ended March 31 , 2000. --------- (PLEASE READ INSTRUCTIONS BEFORE PREPARING FORM.) If amended report, check here: / / White Mountains Insurance Group, Ltd. - -------------------------------------------------------------------------------- Name of Institutional Investment Manager 80 South Main Street Hanover New Hampshire 03755-2053 - -------------------------------------------------------------------------------- Business Address (Street) (City) (State) (Zip) Michael S. Paquette (603) 640-2205 Senior Vice President and Controller - -------------------------------------------------------------------------------- Name, Phone No., and Title of Person Duly Authorized to Submit This Report. ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACTS CONSTITUTE FEDERAL CRIMINAL VIOLATIONS. SEE 18 U.S.C. 1001 AND 15 U.S.C. 78FF(a). The institutional investment manager submitting this Form and its attachments are the person by whom it is signed represent hereby that all information contained therein is true, correct and complete. It is understood that all required items, statements and schedules are considered integral parts of this Form and that the submission of any amendment represents that all unamended items, statements and schedules remain true, correct and complete as previously submitted. Pursuant to the requirements of Securities Exchange Act of 1934, the undersigned institutional investment manager has caused this report to be signed on its behalf in the City of Hanover and State of New Hampshire on the 11th day of May , 2000. ------ ------------- ---- White Mountains Insurance Group, Ltd. -------------------------------------------- (Name of Institutional Investment Manager) -------------------------------------------- (Manual Signature of Person Duly Authorized to Submit This Report) Name and 13F file numbers of ALL Institutional Investment Managers with respect to which this schedule is filled (other than the one filing this report): (LIST IN ALPHABETICAL ORDER). 13F File Numbers will be assigned to Institutional Investment Managers after they file their first report. Name: 13F File No.: Name: 13F File No.: - -------------------------------------------- ----------------- ---------------------- ---------------- 1. Folksamerica Holding Company, Inc. 028-07388 - -------------------------------------------- ----------------- ---------------------- ---------------- 2. White Mountains Facilities, Ltd.. - -------------------------------------------- ----------------- ---------------------- ---------------- 3. White Mountains Services Corp. 028-04947 - -------------------------------------------- ----------------- ---------------------- ---------------- - -------------------------------------------- ----------------- ---------------------- ----------------

WHITE MOUNTAINS INSURANCE GROUP, LTD. FORM 13F FOR MARCH 31, 2000 - -------------------------------------------------------------------------------------------------------------------------------- Title CUSIP Fair Market Number of Investment Discretion Name of Issuer of class Number Value Shares Sole Shared Other Managers * - -------------------------------------------------------------------------------------------------------------------------------- ACE, Ltd. ORD G0070K103 4,368,416 190,969 x ** 3 Affiliated Computer Services CL A 008190100 226,256 6,800 x ** 1 AMBAC Financial Group, Inc. COM 023139108 390,406 7,750 x ** 1 America Online, Inc. COM 02364J104 950,250 14,000 x ** 1 American International Group, Inc. COM 026874107 3,148,125 28,750 x ** 1 Aon Corp. COM 037389103 480,525 14,900 x ** 1 Berkley, W.R. Corp COM 084423102 136,069 5,900 x ** 1 Berkshire Hathaway Inc. CL A 084670108 5,720,000 100 x 2 Berkshire Hathaway Inc. CL A 084670108 16,874,000 295 x ** 1 Berkshire Hathaway Inc. CL B 084670207 950,040 522 x ** 1 Berkshire Hathaway Inc. CL B 084670207 15,542,800 8,540 x ** 1 Bisys Group, Inc. COM 055472104 1,323,350 19,900 x ** 1 Bristol Myers Squibb Co. COM 110122108 2,215,875 38,000 x ** 1 Carnival Corp. COM 143658102 230,976 9,600 x ** 1 Cisco Systems, Inc. COM 17275R102 7,731,250 100,000 x ** 1 Citigroup Inc. COM 172967101 3,592,500 60,000 x ** 1 Coca Cola Co. COM 191216100 1,361,188 29,000 x ** 1 Concord EFS Inc. COM 206197105 183,500 8,000 x ** 1 Dell Computer COM 247025109 3,236,250 60,000 x ** 1 EMC Corporation COM 268648102 5,040,000 40,000 x ** 1 Federal National Mortgage Association COM 313586109 774,906 13,700 x ** 1 Financial Security Assurance Holdings, Ltd. COM 31769P100 509,899,769 6,943,316 x ** 3 Fidelity National Financial, Inc. COM 316326107 5,193,501 376,000 x ** 1 First Data Corp. COM 319963104 508,094 11,450 x ** 1 General Electric Co. COM 369604103 5,913,750 38,000 x ** 1 Gillette Company COM 375766102 3,957,188 105,000 x ** 1 Home Depot Inc. COM 437076102 3,670,050 56,900 x ** 1 IMS Health COM 449934108 348,400 20,200 x ** 1 Intel Corp. COM 458140100 1,319,375 10,000 x ** 1 Intuit Inc. COM 461202103 1,636,688 30,100 x ** 1 John Hancock Financials COM 41014S106 568,969 31,500 x ** 1 Johnson & Johnson COM 478160104 2,669,500 38,000 x ** 1 Lasalle Re Holdings Ltd. ORD G5383Q101 153,180 11,040 x ** 1 Lexmark International CL A 529771107 2,696,625 25,500 x ** 1 Loral Space & Communications Ltd COM G56462107 961,875 95,000 x ** 1 Lucent Technologies COM 549463107 2,824,875 46,500 x ** 1 Marsh & McLennan Cos., Inc. COM 571748102 761,156 6,900 x ** 1 MCI Worldcom, Inc. COM 55268B106 2,832,031 62,500 x ** 1 Microsoft Corp COM 594918104 2,868,750 27,000 x ** 1 Motorola COM 620076109 2,920,000 20,000 x ** 1 Nordstrom Inc. COM 655664100 1,475,000 50,000 x ** 1 Partner Re Ltd. COM G6852T105 456,475 12,400 x ** 1 Pfizer Inc. COM 717081103 2,193,750 60,000 x ** 1 PXRE Group, Ltd. COM G73018106 1,844,500 108,500 x 2 PXRE Group, Ltd. COM G73018106 4,115,700 242,100 x ** 4 PXRE Group, Ltd. COM G73018106 238,000 14,000 x ** 1 Qualcomm, Inc. COM 747525103 2,986,250 20,000 x ** 1 Reinsurance Group America Inc. COM 759351109 147,995 6,215 x ** 1 Schering-Plough Corp. COM 806605101 2,745,225 74,700 x ** 1 Torchmark Corp. COM 891027104 $272,875 11,800 x ** 1 Travelers Property and Casualty CL A 893939108 96,938 2,350 x ** 1 Waddell & Reed Financial Inc. CL A 930059100 1,074,738 25,400 x ** 1 Wal-Mart Stores, Inc. COM 931142103 2,983,200 52,800 x ** 1 Walt Disney Co. COM DISNEY 254687106 4,001,250 97,000 x ** 1 XL Capital Ltd. CL A G98255105 831,456 15,015 x ** 1 -------------- $ 651,643,806 ============== - ------------------------------------------------------------------------------ Voting Authority (Shares) Name of Issuer Sole Shared - ------------------------------------------------------------------------------ ACE, Ltd. 190,969 Affiliated Computer Services 6,800 AMBAC Financial Group, Inc. 7,750 America Online, Inc. 14,000 American International Group, Inc. 28,750 Aon Corp. 14,900 Berkley, W.R. Corp 5,900 Berkshire Hathaway Inc. 100 Berkshire Hathaway Inc. 295 Berkshire Hathaway Inc. 522 Berkshire Hathaway Inc. 8,540 Bisys Group, Inc. 19,900 Bristol Myers Squibb Co. 38,000 Carnival Corp. 9,600 Cisco Systems, Inc. 100,000 Citigroup Inc. 60,000 Coca Cola Co. 29,000 Concord EFS Inc. 8,000 Dell Computer 60,000 EMC Corporation 40,000 Federal National Mortgage Association 13,700 Financial Security Assurance Holdings, Ltd. 6,943,316 Fidelity National Financial, Inc. 376,000 First Data Corp. 11,450 General Electric Co. 38,000 Gillette Company 105,000 Home Depot Inc. 56,900 IMS Health 20,200 Intel Corp. 10,000 Intuit Inc. 30,100 John Hancock Financials 31,500 Johnson & Johnson 38,000 Lasalle Re Holdings Ltd. 11,040 Lexmark International 25,500 Loral Space & Communications Ltd 95,000 Lucent Technologies 46,500 Marsh & McLennan Cos., Inc. 6,900 MCI Worldcom, Inc. 62,500 Microsoft Corp 27,000 Motorola 20,000 Nordstrom Inc. 50,000 Partner Re Ltd. 12,400 Pfizer Inc. 60,000 PXRE Group, Ltd. 108,500 PXRE Group, Ltd. 242,100 PXRE Group, Ltd. 14,000 Qualcomm, Inc. 20,000 Reinsurance Group America Inc. 6,215 Schering-Plough Corp. 74,700 Torchmark Corp. 11,800 Travelers Property and Casualty 2,350 Waddell & Reed Financial Inc. 25,400 Wal-Mart Stores, Inc. 52,800 Walt Disney Co. 97,000 XL Capital Ltd. 15,015 * MANAGERS 1 = Folksamerica Holding Company, Inc. (FORM 13F filed separately) 2 = White Mountains Insurance Group, Ltd. (FORM 13F filed separately) 3 = White Mountains Services Corporation (FORM 13F filed separately) 4 = White Mountains Facilities, Ltd. (FORM 13F filed separately) ** Investment discretion shared with indirect wholly owned insurance subsidiaries