BERKSHIRE HATHAWAY INC.

1440 KIEWIT PLAZA
OMAHA, NEBRASKA 68131
TELEPHONE (402) 346-1400
FAX (402) 346-3375

May 14, 2008

Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, DC 20549

Gentlemen:

Enclosed herewith for filing is one Form 13F for the Quarter ended March
31, 2008.

Yours truly,

BERKSHIRE HATHAWAY INC. 

/s/ Marc D. Hamburg
-----------------------------------
Marc D. Hamburg
Vice President

Enclosures

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, 2008

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 14, 2008
[Signature] [City, State] [Date]

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: 21
Form 13F Information Table Entry Total: 105
Form 13F Information Table Value Total: $66,461,224
xt (thousands)

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. 28-10388 BH Columbia Inc.
 3. 28-719 Blue Chip Stamps
 4. 28-554 Buffett, Warren E.
 5. 28-1517 Columbia Insurance Co.
 6. 28-2226 Cornhusker Casualty Co.
 7. 28-06102 Cypress Insurance Company
 8. 28-11217 Fechheimer Brothers Company
 9. 28- GEC Investment Managers
10. 28-852 GEICO Corp.
11. 28-101 Government Employees Ins. Corp.
12. 28- Medical Protective Corp.
13. 28-1066 National Fire & Marine
14. 28-718 National Indemnity Co.
15. 28-5006 National Liability & Fire Ins. Co.
16. 28-11222 Nebraska Furniture Mart
17. 28-717 OBH Inc.
18. 28- U.S. Investment Corp.
19. 28-1357 Wesco Financial Corp.
20. 28-3091 Wesco Financial Ins. Co.
21. 28-3105 Wesco Holdings Midwest, Inc.

BERKSHIRE HATHAWAY INC.
Form 13F Information Table
March 31, 2008 

 Column 6
 Investment
 Column 4 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 9 753,094 17,225,400 X 4, 2, 5, 17 17,225,400
 349,525 7,994,634 X 4, 13, 17 7,994,634
 5,257,587 120,255,879 X 4, 14, 17 120,255,879
 84,952 1,943,100 X 4, 3, 17, 19, 20, 21 1,943,100
 61,195 1,399,713 X 4, 16, 17 1,399,713
 36,717 839,832 X 4, 8, 17 839,832
 85,348 1,952,142 X 4, 17 1,952,142
Anheuser Busch
Cos. Inc. Com 035229 10 3 1,678,354 35,371,000 X 4, 14, 17 35,371,000
 9,120 192,200 X 4, 18 192,200
Bank of America
Corp. Com 060505 10 4 344,981 9,100,000 X 4, 9, 10, 11, 14, 17 9,100,000
Burlington
Northern Santa Fe Com 12189T 10 4 5,882,291 63,785,418 X 4, 14, 17 63,785,418
Carmax Inc. Com 143130 10 2 413,646 21,300,000 X 4, 9, 10, 11, 14, 17 21,300,000
Coca Cola Com 191216 10 0 24,348 400,000 X 4, 17 400,000
 108,105 1,776,000 X 4, 15, 17 1,776,000
 438,605 7,205,600 X 4, 3, 17, 19, 20, 21 7,205,600
 2,443,419 40,141,600 X 4, 2, 5, 17 40,141,600
 8,518,489 139,945,600 X 4, 14, 17 139,945,600
 556,303 9,139,200 X 4, 13, 17 9,139,200
 29,218 480,000 X 4, 16, 17 480,000
 55,513 912,000 X 4, 7, 17 912,000
Comcast Corp CLA SPL 20030N 20 0 227,640 12,000,000 X 4, 9, 10, 11, 14, 17 12,000,000
Comdisco Holding
Co. Com 200334 10 0 11,813 1,217,795 X 4, 14, 17 1,217,795
 2,938 302,862 X 4, 2, 5, 17 302,862
 167 17,209 X 4, 13, 17 17,209
ConocoPhillips Com 20825C 10 4 1,334,338 17,508,700 X 4, 14, 17 17,508,700
Costco Wholesale
Corp. Com 22160K 10 5 341,352 5,254,000 X 4, 14, 17 5,254,000
Gannett Inc. Com 364730 10 1 100,153 3,447,600 X 4, 14, 17 3,447,600
General Electric
Co. Com 369604 10 3 287,860 7,777,900 X 4 7,777,900
GlaxoSmithKline ADR 37733W 10 5 64,091 1,510,500 X 4, 14, 17 1,510,500
Home Depot Inc. Com 437076 10 2 116,943 4,181,000 X 4, 9, 10, 11, 14, 17 4,181,000
Ingersoll-Rd
Company LTD. CLA G4776G 10 1 28,353 636,600 X 4 636,000
 13,374 300,000 X 4, 9, 10, 11, 14, 17 300,000
Iron Mountain
Inc. Com 462846 10 6 89,161 3,372,200 X 4, 9, 10, 11, 14, 17 3,372,200
 ----------
 29,748,993
 ----------

BERKSHIRE HATHAWAY INC.
Form 13F Information Table
March 31, 2008 

 Column 6
 Investment
 Column 4 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
----------------- -------- ------------ ----------- ----------- ---- ------- ------- -------------------- ----------- ------ -------
Johnson & Johnson Com 478160 10 4 280,401 4,322,500 X 4 4,322,500
 1,314,675 20,266,300 X 4, 2, 5, 17 20,266,300
 1,711,669 26,386,148 X 4, 14, 17 26,386,148
 21,102 325,300 X 4, 3, 17, 19, 20, 21 325,300
 589,487 9,087,200 X 4, 13, 17 9,087,200
 51,377 792,000 X 4, 2, 5, 12, 17 792,000
 37,300 575,000 X 4, 18 575,000
Kraft Foods Inc. Com 50075N 10 4 2,766,787 89,222,400 X 4, 14, 17 89,222,400
 954,807 30,790,300 X 4, 2, 5, 17 30,790,300
 310,100 10,000,000 X 4, 3, 17, 19, 20, 21 10,000,000
 8,056 259,800 X 4, 2, 5, 12, 17 259,800
 248,080 8,000,000 X 4 8,000,000
Lowes Companies
Inc. Com 548661 10 7 160,580 7,000,000 X 4, 9, 10, 11, 14, 17 7,000,000
M & T Bank
Corporation Com 55261F 10 4 483,150 6,003,360 X 4, 14, 17 6,003,360
 43,942 546,000 X 4, 9, 10, 11, 14, 17 546,000
 13,336 165,700 X 4, 13, 17 165,700
Moody's Com 615369 10 5 1,124,333 32,280,600 X 4, 14, 17 32,280,600
 547,507 15,719,400 X 4, 9, 10, 11, 14, 17 15,719,400
Nike Inc. Com 654106 10 3 519,588 7,641,000 X 4, 9, 10, 11, 14, 17 7,641,000
Norfolk Southern
Corp. Com 655844 10 8 105,001 1,933,000 X 4, 2, 5, 17 1,933,000
Procter & Gamble
Co. Com 742718 10 9 4,099,095 58,500,000 X 4, 14, 17 58,500,000
 1,524,163 21,752,000 X 4, 2, 5, 17 21,752,000
 437,237 6,240,000 X 4, 13, 17 6,240,000
 501,316 7,154,500 X 4, 3, 17, 19, 20, 21 7,154,500
 54,655 780,000 X 4, 15, 17 780,000
 109,309 1,560,000 X 4, 7, 17 1,560,000
 384,369 5,485,500 X 4, 9, 10, 11, 14, 17 5,485,500
 306,556 4,375,000 X 4 4,375,000
Sanofi Aventis ADR 80105N 10 5 18,338 488,500 X 4, 9, 10, 11, 14, 17 488,500
 96,813 2,578,933 X 4, 14, 17 2,578,933
 6,356 169,300 X 4, 13, 17 169,300
 13,139 350,000 X 4, 2, 5, 12, 17 350,000
Sun Trusts Banks
Inc. Com 867914 10 3 129,281 2,344,600 X 4, 14, 17 2,344,600
 47,420 860,000 X 4, 2, 5, 17 860,000
Torchmark Corp. Com 891027 10 4 4,662 77,551 X 1, 4, 14, 17 77,551
 27,033 449,728 X 4, 2, 5, 17 449,728
 99,596 1,656,900 X 4, 14, 17 1,656,900
 38,452 639,700 X 4, 13, 17 639,700
 ----------
 19,189,068
 ----------

BERKSHIRE HATHAWAY INC.
Form 13F Information Table
March 31, 2008 

 Column 6
 Investment
 Column 4 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
----------------- -------- ------------ ----------- ----------- ---- ------- ------- -------------------- ----------- ------ -------
Trane Inc. Com 892893 10 8 500,397 10,901,900 X 4, 9, 10, 11, 14, 17 10,901,900
US Bancorp Com 902973 30 4 754,224 23,307,300 X 4, 2, 5, 17 23,307,300
 911,692 28,173,426 X 4, 14, 17 28,173,426
 270,691 8,365,000 X 4 8,365,000
 157,473 4,866,300 X 4, 3, 17, 19, 20, 21 4,866,300
 70,351 2,174,000 X 4, 2, 5, 12, 17 2,174,000
 56,468 1,745,000 X 4, 18 1,745,000
USG Corporation Com 903293 40 5 628,598 17,072,192 X 4, 14, 17 17,072,192
Union Pacific
Corp. Com 907818 10 8 558,317 4,453,000 X 4, 2, 5, 17 4,453,000
United Parcel
Service Inc. Com 911312 10 6 104,360 1,429,200 X 4 1,429,200
United Health
Group Inc. Com 91324P 10 2 219,904 6,400,000 X 4, 9, 10, 11, 14, 17 6,400,000
Wabco Holdings
Inc. Com 92927K 10 2 123,174 2,700,000 X 4, 9, 10, 11, 14, 17 2,700,000
Wal-Mart Stores,
Inc. Com 931142 10 3 1,000,830 18,998,300 X 4, 14, 17 18,998,300
 49,835 946,000 X 4, 9, 10, 11, 14, 17 946,000

Washington Post
Co. Cl B 939640 10 8 591,582 894,304 X 4, 14, 17 894,304
 98,108 148,311 X 4, 5, 1, 6, 14, 17 148,311
 428,761 648,165 X 4, 13, 17 648,165
 24,466 36,985 X 4, 15, 17 36,985
Wells Fargo & Co.
Del Com 949746 10 1 1,556,542 53,489,420 X 4, 2, 5, 17 53,489,420
 367,917 12,643,200 X 4, 3, 17, 19, 20, 21 12,643,200
 1,114,909 38,313,040 X 4, 13, 17 38,313,040
 81,131 2,788,000 X 4, 15, 17 2,788,000
 29,100 1,000,000 X 4, 17 1,000,000
 3,771,112 129,591,488 X 4, 14, 17 129,591,488
 46,842 1,609,720 X 4, 16, 17 1,609,720
 49,470 1,700,000 X 4, 8, 17 1,700,000
 23,862 820,000 X 4, 7, 17 820,000
 582,000 20,000,000 X 4, 9, 10, 11, 14, 17 20,000,000
 465,600 16,000,000 X 4, 1, 6, 14, 17 16,000,000
 232,806 8,000,000 X 4 8,000,000
 78,570 2,700,000 X 4, 2, 5, 12, 17 2,700,000
 58,200 2,000,000 X 4, 18 2,000,000
Wellpoint Inc. Com 949773V 10 7 211,824 4,800,000 X 4, 9, 10, 11, 14, 17 4,800,000
Wesco Finl Corp. Com 950817 10 6 2,304,047 5,703,087 X 4, 3, 17 5,703,087
 -----------
 17,523,163
 -----------
 GRAND TOTAL $66,461,224
 ===========