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, 2013

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:    Steel Partners Holdings L.P.
Address: 590 Madison Avenue, 32nd Floor
         New York, New York 10022

Form 13F File Number: 28-14001

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:  Jack L. Howard
Title: President of General Partner of Reporting Manager
Phone: 212-520-2300

Signature, Place, and Date of Signing:

       /s/ Jack L. Howard, New York, NY, May 14, 2013

Report Type (Check only one):

|X|  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).)

|_|  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).)


<PAGE>

                             FORM 13F SUMMARY PAGE

Report Summary:


Number of Other Included Managers:                                3
                                                    ---------------

Form 13F Information Table Entry Total:                          18
                                                    ---------------

Form 13F Information Table Value Total:                     $278485
                                                    ---------------
                                                        (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.

         No.       Form 13F File Number       Name

          1        28-14563                   SPH Group Holdings LLC

          2        28-14887                   SPH Group LLC

          3        28-14886                   Steel Partners Holdings GP Inc.


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<CAPTION>
                                                     FORM 13F INFORMATION TABLE

   COLUMN 1                   COLUMN 2        COLUMN 3   COLUMN 4         COLUMN 5        COLUMN 6   COLUMN 7        COLUMN 8
--------------                --------        --------   --------    ------------------  ----------  --------  ---------------------
                                                                                                                  VOTING AUTHORITY
                                                          VALUE      SHRS OR   SH/ PUT/  INVESTMENT   OTHER    ---------------------
NAME OF ISSUER                TITLE OF CLASS    CUSIP   (X$1,000)    PRN AMT   PRN CALL  DISCRETION  MANAGERS  SOLE    SHARED   NONE
--------------                --------------    -----   ---------    -------   --- ----  ----------  --------  ----    ------   ----
<S>                           <C>             <C>           <C>      <C>       <C>       <C>         <C>       <C>     <C>       <C>
C&J ENERGY SERVICES           COM             12467B304        234     10200   SH        OTHER       1, 2, 3   0         10200   0
CHIMERA INVESTMENT CORP       COM             16934Q109       2902    909700   SH        OTHER       1, 2, 3   0        909700   0
CINCINNATI BELL               COM             171871106        326    100000   SH        OTHER       1, 2, 3   0        100000   0
DIGITAL GENERATION            COM             25400B108        449     70000   SH        OTHER       1, 2, 3   0         70000   0
FORBES ENERGY SERVICES        COM             345143101      10532   2861932   SH        OTHER       1, 2, 3   0       2861932   0
GENCORP INC                   COM             368682100      55607   4180997   SH        OTHER       1, 2, 3   0       4180997   0
HANDY & HARMAN LTD            COM             410315105     111250   7228735   SH        OTHER       1, 2, 3   0       7228735   0
LYDALL INC DEL                COM             550819106       2024    131887   SH        OTHER       1, 2, 3   0        131887   0
MODUSLINK GLOBAL SOLUTIONS I  COM             60786L107      21388   6481185   SH        OTHER       1, 2, 3   0       6481185   0
NATHANS FAMOUS INC NEW        COM             632347100      18821    445456   SH        OTHER       1, 2, 3   0        445456   0
PARKER DRILLING CO            COM             701081101        856    200000   SH        OTHER       1, 2, 3   0        200000   0
S L INDS INC                  COM             784413106      18036    994840   SH        OTHER       1, 2, 3   0        994840   0
SELECTICA INC                 COM NEW         816288203       3808    420768   SH        OTHER       1, 2, 3   0        420768   0
STEEL PARTNERS HLDGS L P      LTD PRTRSHIP U  85814R107      25568   1877207   SH        OTHER       1, 2, 3   0       1877207   0
SUPERIOR ENERGY SERVICES      COM             868157108       1948     75000   SH        OTHER       1, 2, 3   0         75000   0
TIMKEN CO                     COM             887389104       2263     40000   SH        OTHER       1, 2, 3   0         40000   0
TRANSOCEAN LTD                COM             H8817H100       1039     20000   SH        OTHER       1, 2, 3   0         20000   0
UNISYS CORP                   COM NEW         909214306       1433     63000   SH        OTHER       1, 2, 3   0         63000   0
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