UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2006 Check here if Amendment [ ]; Amendment Number: ______ This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Berkshire Hathaway Inc. Address: 1440 Kiewit Plaza Omaha, NE 68131 Form 13F File Number: 28- 4545 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Marc D. Hamburg Title: Vice President Phone: 402-346-1400 Signature, Place, and Date of Signing: (s) Marc D. Hamburg Omaha, NE May 12, 2006 ------------------------------------- [City, State] [Date] [Signature] Report Type (Check only one.): [ ] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [X] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) List of Other Managers Reporting for this Manager: Form 13F File Number Name -------------------- ----- 28-5194 General Re - New England Asset Management, Inc. Form 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 20 Form 13F Information Table Entry Total: 85 Form 13F Information Table Value Total: $45,757,184 (thousands) Confidential information has been omitted from the form 13F and filed separately with the commission. List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. [If there are no entries in this list, state "NONE" and omit the column headings and list entries.] NO. FORM 13F FILE NUMBER NAME --- -------------------- ---- 1. 28-5678 Berkshire Hathaway Life Insurance Co. of Nebraska 2. 28- BH Columbia Inc. 3. 28-5676 BHG Life Insurance Co. 4. 28-719 Blue Chip Stamps 5. 28-554 Buffett, Warren E. 6. 28-1517 Columbia Insurance Co. 7. 28-2226 Cornhusker Casualty Co. 8. 28- Cypress Insurance Company 9. 28- Fechheimer Brothers Company 10. 28-852 GEICO Corp. 11. 28-101 Government Employees Ins. Corp. 12. 28-1066 National Fire & Marine 13. 28-718 National Indemnity Co. 14. 28-5006 National Liability & Fire Ins. Co. 15. 28- Nebraska Furniture Mart 16. 28-717 OBH Inc. 17. 28-2740 Plaza Investment Managers 18. 28-1357 Wesco Financial Corp. 19. 28-3091 Wesco Financial Ins. Co. 20. 28-3105 Wesco Holdings Midwest, Inc. BERKSHIRE HATHAWAY INC. Form 13F Information Table March 31, 2006 Column 6 Column 4 Investment Discretion Column 8 Market Column 5 --------------------- Voting Authority Column 2 Column 3 Value Shares or (b) (c) Column 7 ----------------------- Column 1 Title of CUSIP (In Principal (a) Shared- Shared- Other (a) (b) (c) Name of Issuer Class Number Thousands) Amount $ Sole Defined Other Managers Sole Shared None -------------- -------- ----------- ---------- ----------- ---- ------- ------- --------------------- ----------- ------ ---- American Express Co. Com 025816 10 9 905,195 17,225,400 X 5, 2, 6, 16 17,225,400 420,118 7,994,634 X 5, 12, 16 7,994,634 6,319,446 120,255,879 X 5, 13, 16 120,255,879 102,110 1,943,100 X 5, 4, 16, 18, 19, 20 1,943,100 73,555 1,399,713 X 5, 15, 16 1,399,713 44,133 839,832 X 5, 9, 16 839,832 102,585 1,952,142 X 5, 16 1,952,142 American Standard Companies Com 029712 10 6 474,147 11,062,700 X 5, 10, 11, 13, 16, 17 11,062,700 Ameriprise Financial, Inc. Com 03076C 10 6 155,235 3,445,080 X 5, 2, 6, 16 3,445,080 72,048 1,598,926 X 5, 12, 16 1,598,926 795,362 17,651,175 X 5, 13, 16 17,651,175 17,511 388,620 X 5, 4, 16, 18, 19, 20 388,620 12,614 279,942 X 5, 15, 16 279,942 7,569 167,966 X 5, 9, 16 167,966 17,593 390,428 X 5, 16 390,428 Anheuser Busch Cos. Inc. Com 035229 10 3 1,875,644 43,854,200 X 5, 13, 16 43,854,200 Block H & R Com 093671 10 5 347,723 16,061,100 X 5, 13, 16 16,061,100 Coca Cola Com 191216 10 0 16,748 400,000 X 5, 16 400,000 74,361 1,776,000 X 5, 14, 16 1,776,000 301,698 7,205,600 X 5, 4, 16, 18, 19, 20 7,205,600 1,680,728 40,141,600 X 5, 2, 6, 16 40,141,600 5,859,522 139,945,600 X 5, 13, 16 139,945,600 382,658 9,139,200 X 5, 12, 16 9,139,200 20,098 480,000 X 5, 15, 16 480,000 38,185 912,000 X 5, 8, 16 912,000 Comcast Corp CLA SPL 20030N 20 0 290,198 11,110,200 X 5, 10, 11, 13, 16, 17 11,110,200 Comdisco Holding Co. Com 200334 10 0 14,947 1,206,369 X 5, 13, 16 1,206,369 3,717 300,028 X 5, 2, 6, 16 300,028 211 17,049 X 5, 12, 16 17,049 ConocoPhillips Com 20825C 10 4 1,132,791 17,938,100 X 5, 13, 16 17,938,100 Costco Wholesale Corp. Com 22160K 10 5 284,557 5,254,000 X 5, 13, 16 5,254,000 First Data Corporation Com 319963 10 4 468,200 10,000,000 X 5, 10, 11, 13, 16, 17 10,000,000 Gannett Inc. Com 364730 10 1 206,580 3,447,600 X 5, 13, 16 3,447,600 Gap Inc. Com 364760 10 8 186,800 10,000,000 X 5, 10, 11, 13, 16, 17 10,000,000 General Electric Co. Com 369604 10 3 270,515 7,777,900 X 5 7,777,900 ---------- 22,975,102 ---------- BERKSHIRE HATHAWAY INC. Form 13F Information Table March 31, 2006 Column 6 Column 4 Investment Discretion Column 8 Market Column 5 --------------------- Voting Authority Column 2 Column 3 Value Shares or (b) (c) Column 7 ------------------------- Column 1 Title of CUSIP (In Principal (a) Shared- Shared- Other (a) (b) (c) Name of Issuer Class Number Thousands) Amount $ Sole Defined Other Managers Sole Shared None -------------- -------- ----------- ---------- ---------- ---- ------- ------- --------------------- ---------- ------ ------- Home Depot Inc. Com 437076 10 2 176,856 4,181,000 X 5, 10, 11, 13, 16, 17 4,181,000 Iron Mountain Inc. Com 462846 10 6 141,910 3,483,300 X 5, 10, 11, 13, 16, 17 3,483,300 Lexmark International, Inc. Cl A 529771 10 7 114,408 2,521,100 X 5, 10, 11, 13, 16, 17 2,521,100 Lowes Companies Inc. Com 548661 10 7 25,132 390,000 X 5, 10, 11, 13, 16, 17 390,000 M & T Bank Corporation Com 55261F 10 4 684,504 5,997,060 X 5, 13, 16 5,997,060 62,320 546,000 X 5, 10, 11, 13, 16, 17 546,000 18,913 165,700 X 5, 12, 16 165,700 Moody's Com 615369 10 5 2,306,772 32,280,600 X 5, 13, 16 32,280,600 1,123,308 15,719,400 X 5, 10, 11, 13, 16, 17 15,719,400 Nike Inc. Com 654106 10 3 210,588 2,474,600 X 5, 10, 11, 13, 16, 17 2,474,600 Outback Steakhouse Inc. Com 689899 10 2 80,027 1,818,800 X 5, 10, 11, 13, 16, 17 1,818,800 Petrochina Co LTD ADR 71646E 10 0 7,651 72,900 X 5, 13, 16 72,900 61,511 586,100 X 5, 10, 11, 13, 16, 17 586,100 Pier 1 Imports Inc. Com 720279 10 8 38,197 3,290,000 X 5, 10, 11, 13, 16, 17 3,290,000 Proctor & Gamble Co. Com 742718 10 9 3,371,355 58,500,000 X 5, 13, 16 58,500,000 1,168,736 20,280,000 X 5, 2, 6, 16 20,280,000 359,611 6,240,000 X 5, 12, 16 6,240,000 412,314 7,154,500 X 5, 4, 16, 18, 19, 20 7,154,500 44,951 780,000 X 5, 14, 16 780,000 89,903 1,560,000 X 5, 8, 16 1,560,000 316,129 5,485,500 X 5, 10, 11, 13, 16, 17 5,485,500 Sealed Air Corporation Com 81211K 10 0 42,702 737,900 X 5, 13, 16 737,900 Servicemaster Company Com 81760N 10 9 57,523 4,384,400 X 5, 10, 11, 13, 16, 17 4,384,400 Sun Trusts Banks Inc. Com 867914 10 3 170,593 2,344,600 X 5, 13, 16 2,344,600 62,574 860,000 X 5, 2, 6, 16 860,000 Torchmark Corp. Com 891027 10 4 4,428 77,551 X 1, 5, 13, 16 77,551 25,679 449,728 X 5, 2, 6, 16 449,728 94,609 1,656,900 X 5, 13, 16 1,656,900 36,527 639,700 X 5, 12, 16 639,700 Tyco International LTD Com 902124 10 6 268,800 10,000,000 X 5, 10, 11, 13, 16, 17 10,000,000 USG Corporation Com 903293 40 5 617,240 6,500,000 X 5, 13, 16 6,500,000 United Parcel Service Inc. Com 911312 10 6 113,450 1,429,200 X 5 1,429,200 Wal-Mart Stores, Inc. Com 931142 10 3 897,480 18,998,300 X 5, 13, 16 18,998,300 44,689 946,000 X 5, 10, 11, 16, 17 946,000 Washington Post Co. Cl B 939640 10 8 694,651 894,304 X 5, 13, 16 894,304 115,201 148,311 X 5, 1, 3, 7, 13, 16 148,311 503,462 648,165 X 5, 12, 16 648,165 28,728 36,985 X 5, 14, 16 36,985 ---------- 14,593,432 ---------- BERKSHIRE HATHAWAY INC. Form 13F Information Table March 31, 2006 Column 6 Column 4 Investment Discretion Column 8 Market Column 5 --------------------- Voting Authority Column 2 Column 3 Value Shares or (b) (c) Column 7 ------------------------- Column 1 Title of CUSIP (In Principal (a) Shared- Shared- Other (a) (b) (c) Name of Issuer Class Number Thousands) Amount $ Sole Defined Other Managers Sole Shared None -------------- -------- ----------- ----------- ---------- ---- ------- ------- --------------------- ---------- ------ ------- Wells Fargo & Co. Del Com 949746 10 1 1,265,910 19,820,110 X 5, 2, 6, 16 19,820,110 65,250 1,021,600 X 5, 4, 16, 18, 19, 20 1,021,600 970,509 15,195,070 X 5, 12, 16 15,195,070 89,035 1,394,000 X 5, 14, 16 1,394,000 163,503 2,560,000 X 5, 16 2,560,000 2,452,886 38,404,360 X 5, 13, 16 38,404,360 38,632 604,860 X 5, 15, 16 604,860 54,289 850,000 X 5, 9, 16 850,000 9,581 150,000 X 5, 8, 16 150,000 638,700 10,000,000 X 5, 10, 11, 13, 16, 17 10,000,000 164,823 2,580,600 X 5 2,580,600 Wesco Finl Corp. Com 950817 10 6 2,275,532 5,703,087 X 5, 4, 16 5,703,087 ----------- 8,188,650 ----------- GRAND TOTAL $45,757,184 ===========