UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 13F

                               FORM 13F COVER PAGE

Report for the Calendar Year or Quarter Ended:  June 30, 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:      Insight Holdings Group LLC
Address:   680 Fifth Avenue, 8th Floor
           New York, NY  10019


Form 13F File Number: 28-12516
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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:      BLAIR FLICKER.
Title:     MANAGING DIRECTOR
Phone:     212-230-9200

Signature, Place, and Date of Signing:

       Blair Flicker                  New York                August 8, 2008
- --------------------------      -------------------       --------------------
        [Signature]                [City, State]                  [Date]


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).)


List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]

     Form 13F File Number           Name

     28-12516
        -------                     --------------------------------------------
     [Repeat as necessary.]






                              FORM 13F SUMMARY PAGE


Report Summary:


Number of Other Included Managers:          3

Form 13F Information Table Entry Total:     2

Form 13F Information Table Value Total:     $10,202
                                            ---------------------------
                                                   (thousands)


List of Other Included Managers:

1. Insight Venture Associates V, L.L.C.
2. Insight Venture Associates IV, L.L.C.
3. Insight Venture Associates III, L.L.C.

The filing of this report shall not be deemed an admission, for purposes of
Section 13(f), 13(d), 13(g), or 16(a) under the Securities Exchange Act of 1934,
as amended, and the rules thereunder, or for any other purpose, that the
Reporting Manager or any Other Included Manager exercises investment discretion
or is a member of such a group with respect to such securities. Reference is
made to reports filed under Sections 13(d), 13(g), and 16(a) for additional
information with respect to such beneficial ownership and/or pecuniary interest
of the Reporting Manager, any Other Included Manager and related entities.

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
                  28-12516
        ------    --------------------             -----------------------------

        [Repeat as necessary.]





                                                      FORM 13F INFORMATION TABLE



   COLUMN 1          COLUMN 2     COLUMN 3  COLUMN 4           COLUMN 5           COLUMN 6     COLUMN 7          COLUMN 8
- --------------    --------------  --------  --------   ----------------------    ----------    --------    ----------------------
NAME OF ISSUER    TITLE OF CLASS    CUSIP    VALUE     SHRS OR    SH/    PUT/    INVESTMENT     OTHER
                                           (x$1000)    PRN AMT    PRN    CALL    DISCRETION    MANAGERS    SOLE    SHARED    NONE
- --------------    --------------  --------  --------   ----------------------    ----------    --------    ----------------------
                                                                                           
CallWave, Inc.         Com                   7,878    3,029,996   Sh              Defined         2              3,029,996
- ---------------------------------------------------------------------------------------------------------------------------------
DivX, Inc.             Com                   2,324      316,632   Sh              Defined         1                316,632
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[Repeat as necessary]