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, 2010

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 Partners LLC
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Address:    200 Clarendon Street, 35th Floor
            ------------------------------------
            Boston, MA 02116
            ------------------------------------

            ------------------------------------


Form 13F File Number: 028-________________

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:             Robert J. Small
                  -----------------------
Title:            Managing Director
                  -----------------------
Phone:            617-227-0050
                  -----------------------

Signature, Place, and Date of Signing:

 /s/ Robert J. Small             Boston, MA               February 14, 2011
- ----------------------          ------------           ---------------------
   [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 re- port, 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 Reportingt for this Manager:
[If there are no entries in this list, omit this section.]

Form 13F File Number                 Name

28-_______________                   Stockbridge Partners LLC
- ----------------------               --------------------------
[Repeat as necessary.]




                             Form 13F SUMMARY PAGE


Report Summary:


Number of Other Included Managers:                         0
                                                 -----------
Form 13F Information Table Entry Total:                    2
                                                 -----------
Form 13F Information Table Value Total:             $491,744
                                                 -----------
                                                   (thousands)


List of Other Included Managers:

NONE

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

____    28-________________________  ______________________________________
[Repeat as necessary.]







                                                              FORM 13F INFORMATION TABLE
                                                FOR QUARTER ENDED DECEMBER 31, 2010

ITEM 1      ITEM 2    ITEM 3     ITEM 4              ITEM 5             ITEM 6      ITEM 7           ITEM 8
- ------      ------    ------     ------     ---------------------     ----------    ------    --------------------
NAME        TITLE)                          SHRS
OF          OF                   VALUE      OR        SH/    PUT/     INVESTMENT    OTHER           VOTING AUTHORITY
ISSUER      CLASS     CUSIP     (x$1000)    PRN AMT   PRN    CALL     DISCRETION    MANAGER   SOLE        SHARED        NONE
- ------      ------    ------     ------     -------   ---    ----     ----------    -------   ----        ------        ----
                                                                                       
CARTER
INC.        COMMON    146229109  $194,484   6,590,432 SH     --       SOLE            --      6,590,432   --            --
- ----------------------------------------------------------------------------------------------------------------------------
TRANSDIGM
GROUP INC.  COMMON    893641100  $297,260   4,128,032  SH    --       SOLE            --      4,128,032   --            --