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

                                February 14, 2013

Securities and Exchange Commission
100 F Street NE
Washington, DC  20549

Gentlemen:

     Enclosed herewith for filing is one Form 13F for the Quarter ended
December 31, 2012.


                                                     Yours truly,

                                                     BERKSHIRE HATHAWAY INC.

                                                     /s/ Marc D. Hamburg
                                                     ---------------------------
                                                     Marc D. Hamburg
                                                     Senior 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: December 31, 2012


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:   3555 Farnam Street
           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:     Senior Vice President
Phone:     402-346-1400


Signature, Place, and Date of Signing:

   /s/ Marc D. Hamburg                Omaha, NE                February 14, 2013
--------------------------    -------------------------        -----------------
       [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:                        14

Form 13F Information Table Entry Total:                  123

Form 13F Information Table Value Total:       $   75,313,620
                                                     (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   NAME
     NUMBER

1.   28-2226         Berkshire Hathaway Homestate Insurance Company
2.   28-5678         Berkshire Hathaway Life Insurance Co. of Nebraska
3.   28-14389        BH Finance LLC
4.   28-554          Buffett, Warren E.
5.   28-1517         Columbia Insurance Co.
6.   28-06102        Cypress Insurance Company
7.   28-11217        Fechheimer Brothers Company
8.   28-852          GEICO Corp.
9.   28-12941        Medical Protective Corp.
10.  28-1066         National Fire & Marine
11.  28-718          National Indemnity Co.
12.  28-5006         National Liability & Fire Ins. Co.
13.  28-11222        Nebraska Furniture Mart
14.  28-12947        U.S. Investment Corp.






                            Berkshire Hathaway Inc.
                          Form 13F Information Table
                               December 31, 2012



                                                            Shares or                                 Voting Authority
                                             Market Value   Principal    Investment    Other    ----------------------------
Name of Issuer    Title of Class  CUSIP     (In Thousands)   Amount      Discretion   Managers     Sole      Shared     None
                                                                                          
AMERICAN
  EXPRESS CO        COM           025816109      112,209     1,952,142 Shared-Defined 4           1,952,142       -        -
AMERICAN
  EXPRESS CO        COM           025816109      990,116    17,225,400 Shared-Defined 4, 5       17,225,400       -        -
AMERICAN
  EXPRESS CO        COM           025816109       48,274       839,832 Shared-Defined 4, 7          839,832       -        -
AMERICAN
  EXPRESS CO        COM           025816109      111,689     1,943,100 Shared-Defined 4, 8, 11    1,943,100       -        -
AMERICAN
  EXPRESS CO        COM           025816109      459,532     7,994,634 Shared-Defined 4, 10       7,994,634       -        -
AMERICAN
  EXPRESS CO        COM           025816109    6,912,308   120,255,879 Shared-Defined 4, 11     120,255,879       -        -
AMERICAN
  EXPRESS CO        COM           025816109       80,456     1,399,713 Shared-Defined 4, 13       1,399,713       -        -
ARCHER DANIELS
  MIDLAND CO        COM           039483102      163,151     5,956,600 Shared-Defined 4, 5        5,956,600       -        -
BANK OF NEW
  YORK MELLON
  CORP              COM           064058100      206,661     8,041,300 Shared-Defined 4           8,041,300       -        -
BANK OF NEW
  YORK MELLON
  CORP              COM           064058100       46,104     1,793,915 Shared-Defined 2, 4, 11    1,793,915       -        -
BANK OF NEW
  YORK MELLON
  CORP              COM           064058100      251,827     9,798,700 Shared-Defined 4, 8, 11    9,798,700       -        -
COCA COLA CO        COM           191216100       29,000       800,000 Shared-Defined 4             800,000       -        -
COCA COLA CO        COM           191216100    2,910,266    80,283,200 Shared-Defined 4, 5       80,283,200       -        -
COCA COLA CO        COM           191216100       66,120     1,824,000 Shared-Defined 4, 6        1,824,000       -        -
COCA COLA CO        COM           191216100      522,406    14,411,200 Shared-Defined 4, 8, 11   14,411,200       -        -
COCA COLA CO        COM           191216100      662,592    18,278,400 Shared-Defined 4, 10      18,278,400       -        -
COCA COLA CO        COM           191216100   10,146,056   279,891,200 Shared-Defined 4, 11     279,891,200       -        -
COCA COLA CO        COM           191216100      128,760     3,552,000 Shared-Defined 4, 12       3,552,000       -        -
COCA COLA CO        COM           191216100       34,800       960,000 Shared-Defined 4, 13         960,000       -        -
CONOCOPHILLIPS      COM           20825C104       58,858     1,014,974 Shared-Defined 4, 8, 11    1,014,974       -        -
CONOCOPHILLIPS      COM           20825C104      115,939     1,999,300 Shared-Defined 4, 10       1,999,300       -        -
CONOCOPHILLIPS      COM           20825C104    1,224,148    21,109,637 Shared-Defined 4, 11      21,109,637       -        -
COSTCO WHSL
  CORP NEW          COM           22160K105      427,833     4,333,363 Shared-Defined 4, 11       4,333,363       -        -
DAVITA
  HEALTHCARE
  PARTNERS I        COM           23918K108      840,905     7,607,935 Shared-Defined 4           7,607,935       -        -
DAVITA
  HEALTHCARE
  PARTNERS I        COM           23918K108      663,180     6,000,000 Shared-Defined 4, 8, 11    6,000,000       -        -
DEERE & CO          COM           244199105      144,002     1,666,300 Shared-Defined 4           1,666,300       -        -
DEERE & CO          COM           244199105      199,843     2,312,467 Shared-Defined 4, 8, 11    2,312,467       -        -
DIRECTV             COM           25490A309      553,661    11,037,900 Shared-Defined 4          11,037,900       -        -
DIRECTV             COM           25490A309    1,153,660    22,999,600 Shared-Defined 4, 8, 11   22,999,600       -        -
GANNETT INC         COM           364730101       31,342     1,740,231 Shared-Defined 4, 11       1,740,231       -        -
GENERAL
  DYNAMICS CORP     COM           369550108      268,568     3,877,122 Shared-Defined 4, 8, 11    3,877,122       -        -






                                                                                          
GENERAL
  ELECTRIC CO       COM           369604103       12,361       588,900 Shared-Defined 4             588,900       -        -
GENERAL MTRS CO     COM           37045V100      432,450    15,000,000 Shared-Defined 4          15,000,000       -        -
GENERAL MTRS CO     COM           37045V100      288,300    10,000,000 Shared-Defined 4, 8, 11   10,000,000       -        -
GLAXOSMITHKLINE     SPONSORED
  PLC               ADR           37733W105       65,661     1,510,500 Shared-Defined 4, 11       1,510,500       -        -
INTERNATIONAL
  BUSINESS MACHS    COM           459200101       16,182        84,480 Shared-Defined 4              84,480       -        -
INTERNATIONAL
  BUSINESS MACHS    COM           459200101      114,468       597,588 Shared-Defined 4, 5          597,588       -        -
INTERNATIONAL
  BUSINESS MACHS    COM           459200101       90,948       474,800 Shared-Defined 4, 8, 11      474,800       -        -
INTERNATIONAL
  BUSINESS MACHS    COM           459200101   12,825,923    66,958,616 Shared-Defined 4, 11      66,958,616       -        -
JOHNSON &
  JOHNSON           COM           478160104       22,930       327,100 Shared-Defined 4             327,100       -        -
KRAFT FOODS
  GROUP INC         COM           50076Q106        8,761       192,666 Shared-Defined 4             192,666       -        -
KRAFT FOODS
  GROUP INC         COM           50076Q106       67,116     1,476,048 Shared-Defined 4, 8, 11    1,476,048       -        -
LEE ENTERPRISES
  INC               COM           523768109          101        88,863 Shared-Defined 4, 5           88,863       -        -
LIBERTY MEDIA       LIB CAP
  CORPORATION       COM A         530322106      304,218     2,622,340 Shared-Defined 4           2,622,340       -        -
LIBERTY MEDIA       LIB CAP
  CORPORATION       COM A         530322106      348,030     3,000,000 Shared-Defined 4, 8, 11    3,000,000       -        -
M & T BK CORP       COM           55261F104       53,765       546,000 Shared-Defined 4, 8, 11      546,000       -        -
M & T BK CORP       COM           55261F104       16,227       164,795 Shared-Defined 4, 10         164,795       -        -
M & T BK CORP       COM           55261F104      459,977     4,671,245 Shared-Defined 4, 11       4,671,245       -        -
MASTERCARD INC      CL A          57636Q104      198,968       405,000 Shared-Defined 4, 8, 11      405,000       -        -
MEDIA GEN INC       CL A          584404107       19,979     4,646,220 Shared-Defined 4           4,646,220       -        -
MONDELEZ INTL
  INC               CL A          609207105       14,712       578,000 Shared-Defined 4             578,000       -        -
MONDELEZ INTL
  INC               CL A          609207105      103,065     4,049,200 Shared-Defined 4, 5        4,049,200       -        -
MONDELEZ INTL
  INC               CL A          609207105      180,392     7,087,200 Shared-Defined 4, 8, 11    7,087,200       -        -
MONDELEZ INTL
  INC               CL A          609207105       28,662     1,126,050 Shared-Defined 4, 11       1,126,050       -        -
MOODYS CORP         COM           615369105      791,000    15,719,400 Shared-Defined 4, 8, 11   15,719,400       -        -
MOODYS CORP         COM           615369105      638,855    12,695,850 Shared-Defined 4, 11      12,695,850       -        -
NATIONAL
  OILWELL VARCO
  INC               COM           637071101      214,031     3,131,400 Shared-Defined 4           3,131,400       -        -
NATIONAL
  OILWELL VARCO
  INC               COM           637071101      147,868     2,163,400 Shared-Defined 4, 8, 11    2,163,400       -        -
PHILLIPS 66         COM           718546104      344,927     6,495,800 Shared-Defined 4           6,495,800       -        -
PHILLIPS 66         COM           718546104      483,935     9,113,650 Shared-Defined 4, 8, 11    9,113,650       -        -
PHILLIPS 66         COM           718546104       53,081       999,650 Shared-Defined 4, 10         999,650       -        -
PHILLIPS 66         COM           718546104      560,461    10,554,818 Shared-Defined 4, 11      10,554,818       -        -
PRECISION
  CASTPARTS CORP    COM           740189105      224,413     1,184,735 Shared-Defined 4           1,184,735       -        -
PRECISION
  CASTPARTS CORP    COM           740189105      150,134       792,601 Shared-Defined 4, 8, 11      792,601       -        -
PROCTER &
  GAMBLE CO         COM           742718109       21,413       315,400 Shared-Defined 4             315,400       -        -
PROCTER &
  GAMBLE CO         COM           742718109    1,376,809    20,280,000 Shared-Defined 4, 5       20,280,000       -        -
PROCTER &
  GAMBLE CO         COM           742718109      105,908     1,560,000 Shared-Defined 4, 6        1,560,000       -        -
PROCTER &
  GAMBLE CO         COM           742718109      423,634     6,240,000 Shared-Defined 4, 8, 11    6,240,000       -        -
PROCTER &
  GAMBLE CO         COM           742718109      423,634     6,240,000 Shared-Defined 4, 10       6,240,000       -        -
PROCTER &
  GAMBLE CO         COM           742718109    1,179,771    17,377,678 Shared-Defined 4, 11      17,377,678       -        -
PROCTER &
  GAMBLE CO         COM           742718109       52,954       780,000 Shared-Defined 4, 12         780,000       -        -






                                                                                          
SANOFI              SPONSORED
                    ADR           80105N105       23,145       488,500 Shared-Defined 4, 8, 11      488,500       -        -
SANOFI              SPONSORED
                    ADR           80105N105       24,152       509,742 Shared-Defined 4, 5, 9       509,742       -        -
SANOFI              SPONSORED
                    ADR           80105N105        8,021       169,300 Shared-Defined 4, 10         169,300       -        -
SANOFI              SPONSORED
                    ADR           80105N105      137,219     2,896,133 Shared-Defined 4, 11       2,896,133       -        -
TORCHMARK CORP      COM           891027104        6,011       116,326 Shared-Defined 2, 4, 11      116,326       -        -
TORCHMARK CORP      COM           891027104       34,856       674,592 Shared-Defined 4, 5          674,592       -        -
TORCHMARK CORP      COM           891027104       49,580       959,550 Shared-Defined 4, 10         959,550       -        -
TORCHMARK CORP      COM           891027104      128,418     2,485,350 Shared-Defined 4, 11       2,485,350       -        -
US BANCORP DEL      COM NEW       902973304       18,853       590,275 Shared-Defined 4             590,275       -        -
US BANCORP DEL      COM NEW       902973304      744,435    23,307,300 Shared-Defined 4, 5       23,307,300       -        -
US BANCORP DEL      COM NEW       902973304      404,977    12,679,300 Shared-Defined 4, 8, 11   12,679,300       -        -
US BANCORP DEL      COM NEW       902973304       69,438     2,174,000 Shared-Defined 4, 5, 9     2,174,000       -        -
US BANCORP DEL      COM NEW       902973304      663,353    20,768,726 Shared-Defined 4, 11      20,768,726       -        -
US BANCORP DEL      COM NEW       902973304       55,735     1,745,000 Shared-Defined 4, 14       1,745,000       -        -
U S G CORP          COM NEW       903293405      479,216    17,072,192 Shared-Defined 4, 11      17,072,192       -        -
UNITED PARCEL
  SERVICE INC       CL B          911312106        4,380        59,400 Shared-Defined 4              59,400       -        -
VERISIGN INC        COM           92343E102      143,079     3,685,700 Shared-Defined 4           3,685,700       -        -
VERISK ANALYTICS
  INC               CL A          92345Y106       79,688     1,563,434 Shared-Defined 4, 8, 11    1,563,434       -        -
VIACOM INC NEW      CL B          92553P201      208,534     3,954,000 Shared-Defined 4           3,954,000       -        -
VIACOM INC NEW      CL B          92553P201      192,670     3,653,200 Shared-Defined 4, 8, 11    3,653,200       -        -
VISA INC            COM CL A      92826C839      235,776     1,555,459 Shared-Defined 4, 8, 11    1,555,459       -        -
WABCO HLDGS INC     COM           92927K102      158,648     2,433,632 Shared-Defined 4           2,433,632       -        -
WABCO HLDGS INC     COM           92927K102      106,800     1,638,293 Shared-Defined 4, 8, 11    1,638,293       -        -
WAL MART STORES
  INC               COM           931142103       19,787       290,000 Shared-Defined 4             290,000       -        -
WAL MART STORES                                                                       1, 2, 4,
  INC               COM           931142103       11,599       170,000 Shared-Defined 11            170,000       -        -
WAL MART STORES
  INC               COM           931142103        2,013        29,500 Shared-Defined 2, 4, 11       29,500       -        -
WAL MART STORES
  INC               COM           931142103      286,566     4,200,000 Shared-Defined 3, 4, 5     4,200,000       -        -
WAL MART STORES
  INC               COM           931142103       71,508     1,048,040 Shared-Defined 4, 5        1,048,040       -        -
WAL MART STORES
  INC               COM           931142103       17,467       256,000 Shared-Defined 4, 6          256,000       -        -
WAL MART STORES
  INC               COM           931142103       64,546       946,000 Shared-Defined 4, 8, 11      946,000       -        -
WAL MART STORES
  INC               COM           931142103      122,063     1,789,000 Shared-Defined 4, 5, 9     1,789,000       -        -
WAL MART STORES
  INC               COM           931142103       57,927       849,000 Shared-Defined 4, 10         849,000       -        -
WAL MART STORES
  INC               COM           931142103    2,552,665    37,412,642 Shared-Defined 4, 11      37,412,642       -        -
WAL MART STORES
  INC               COM           931142103       34,866       511,000 Shared-Defined 4, 14         511,000       -        -
WASHINGTON POST                                                                       1, 2, 4,
  CO                CL B          939640108       54,165       148,311 Shared-Defined 11                  -       -  148,311
WASHINGTON POST
  CO                CL B          939640108      236,716       648,165 Shared-Defined 4, 10               -       -  648,165
WASHINGTON POST
  CO                CL B          939640108      326,609       894,304 Shared-Defined 4, 11               -       -  894,304
WASHINGTON POST
  CO                CL B          939640108       13,507        36,985 Shared-Defined 4, 12               -       -   36,985
WELLS FARGO &
  CO NEW            COM           949746101      355,472    10,400,000 Shared-Defined 4          10,400,000       -        -
WELLS FARGO &                                                                         1, 2, 4,
  CO NEW            COM           949746101      546,880    16,000,000 Shared-Defined 11         16,000,000       -        -






                                                                                          
WELLS FARGO &
  CO NEW            COM           949746101      181,274     5,303,500 Shared-Defined 2, 4, 11    5,303,500       -        -
WELLS FARGO &
  CO NEW            COM           949746101      232,863     6,812,857 Shared-Defined 3, 4, 5     6,812,857       -        -
WELLS FARGO &
  CO NEW            COM           949746101    2,307,812    67,519,371 Shared-Defined 4, 5       67,519,371       -        -
WELLS FARGO &
  CO NEW            COM           949746101       28,028       820,000 Shared-Defined 4, 6          820,000       -        -
WELLS FARGO &
  CO NEW            COM           949746101       58,106     1,700,000 Shared-Defined 4, 7        1,700,000       -        -
WELLS FARGO &
  CO NEW            COM           949746101    1,232,845    36,069,200 Shared-Defined 4, 8, 11   36,069,200       -        -
WELLS FARGO &
  CO NEW            COM           949746101      350,926    10,267,000 Shared-Defined 4, 5, 9    10,267,000       -        -
WELLS FARGO &
  CO NEW            COM           949746101    1,719,366    50,303,270 Shared-Defined 4, 10      50,303,270       -        -
WELLS FARGO &
  CO NEW            COM           949746101    7,802,096   228,264,943 Shared-Defined 4, 11     228,264,943       -        -
WELLS FARGO &
  CO NEW            COM           949746101       95,294     2,788,000 Shared-Defined 4, 12       2,788,000       -        -
WELLS FARGO &
  CO NEW            COM           949746101       55,020     1,609,720 Shared-Defined 4, 13       1,609,720       -        -
WELLS FARGO &
  CO NEW            COM           949746101       68,360     2,000,000 Shared-Defined 4, 14       2,000,000       -        -

                    Total                     75,313,620