UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                               (Amendment No. __)*

                            Insight Enterprises, Inc.
                         -------------------------------
                                (Name of Issuer)

                          Common Stock, $.01 par value
                         ------------------------------
                         (Title of Class of Securities)

                                    45765U103
                                  -------------
                                 (CUSIP Number)

                                February 21, 2003
             -------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

         Check the  appropriate box to designate the rule pursuant to which this
Schedule is filed:

                                [ ] Rule 13d-1(b)

                                [X] Rule 13d-1(c)

                                [ ] Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).






SCHEDULE 13G
Insight Enterprise, Inc.

CUSIP No. 45765U103

--------------------------------------------------------------------------------
1) NAME OF REPORTING PERSONS
             S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

                    Ahmet H. Okumus
--------------------------------------------------------------------------------
2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                           (a) (b)
--------------------------------------------------------------------------------
3) SEC USE ONLY
--------------------------------------------------------------------------------
4) CITIZENSHIP OR PLACE OR ORGANIZATION

                     Republic of Turkey
--------------------------------------------------------------------------------
NUMBER OF                  5)       SOLE VOTING POWER
SHARES                                                0
BENEFICIALLY            --------------------------------------------------------
OWNED BY                   6)       SHARED VOTING POWER
EACH                                                    2,564,600
REPORTING               --------------------------------------------------------
PERSON                     7)       SOLE DISPOSITIVE POWER
WITH                                                     0
                        --------------------------------------------------------
                           8)       SHARED DISPOSITIVE POWER
                                                        2,564,600
--------------------------------------------------------------------------------
9)       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                    2,564,600
--------------------------------------------------------------------------------
10)      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

--------------------------------------------------------------------------------
11)      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
                                            5.6%
--------------------------------------------------------------------------------
12) TYPE OF REPORTING PERSON*
                                       IN



                                      -2-



NOTE:  Issuer  reported  46,072,383  shares of  common  stock,  $.01 par  value,
outstanding  in its Quarterly  Report on Form 10-Q filed with the Securities and
Exchange Commission on November 14, 2002.

Item 1(a).  Name of Issuer:

         Insight Enterprises, Inc.

Item 1(b).  Address of Issuer's Principal Executive Offices:

         1305 West Auto Drive
         Tempe, AZ 85284

Item 2(a).  Name of Person Filing:

         This statement is filed by:

         Ahmet H. Okumus  ("Okumus") with respect to the shares of Common Stock,
par value $.01 per share  ("Common  Stock") of Insight  Enterprises,  Inc.  (the
"Company") also beneficially  owned by (a) (i) Okumus Opportunity Fund, Ltd., an
international  business company incorporated in the British Virgin Islands, (ii)
Okumus   Technology  Value  Fund,   Ltd.,  an  international   business  company
incorporated  in the British Virgin  Islands,  (iii) Okumus Market Neutral Fund,
Ltd., an  international  business  company  incorporated  in the British  Virgin
Islands, and (iv) Okumus Diversified Value Fund, Ltd., an international business
company  incorporated in the British Virgin  Islands,  for which Okumus Capital,
LLC, a Delaware limited liability company ("OC") of which Okumus is the managing
member, serves as the investment manager, (b) Okumus Opportunity Partners, LP, a
Delaware limited partnership, for which Okumus Advisors, LLC, a Delaware limited
liability  company of which  Okumus is the  managing  member,  serves as general
partner and investment  advisor,  (c) Okumus  Technology  Value Partners,  LP, a
Delaware  limited  partnership,  for which Okumus  Technology  Advisors,  LLC, a
Delaware  limited  liability  company of which  Okumus is the  managing  member,
serves as general  partner and  investment  advisor,  (d) Okumus Market  Neutral
Partners,  LP, a Delaware limited  partnership,  for which Okumus Market Neutral
Advisors,  LLC,  a Delaware  limited  liability  company of which  Okumus is the
managing  member,  serves as general  partner and  investment  advisor,  and (e)
Okumus  Diversified Value Partners,  L.P., a Delaware limited  partnership,  for
which Okumus Diversified Advisors,  LLC, a Delaware limited liability company of
which Okumus is the managing  member,  serves as general  partner and investment
advisor. In addition, OC manages on a discretionary basis a separate account for
an unrelated entity, Daiwa Super Hedge Fund Ltd.

         Okumus is hereinafter referred to as the "Reporting Person."

Item 2(b).   Address of Principal Business Office or, if None, Residence:

         The principal business office of the Reporting Person is as follows:

                  850 Third Avenue, 10th Floor
                  New York, New York  10022

Item 2(c).   Citizenship:

         Okumus is a citizen of the Republic of Turkey.


                                      -3-


Item 2(d).   Title of Class of Securities:

         Common Stock, $.01 par value

Item 2(e).   CUSIP Number:

         45765U103

Item 4.  Ownership.



         A. Okumus
                                        
            (a) Amount beneficially owned: 2,564,600
            (b) Percent of class:               5.6%
            (c) (i)      Sole power to vote or direct the vote:                               0
                (ii)     Shared power to vote or direct the vote:                     2,564,600
                (iii)    Sole power to dispose or direct the disposition:                     0
                (iv)     Shared power to dispose or direct the disposition:           2,564,600


Item 5.  Ownership of Five Percent or Less of a Class.

         N.A.

Item 6.  Ownership of More than Five Percent on Behalf of Another Person.

         N.A.

Item 7.  Identification  and Classification of the Subsidiary Which Acquired
         the Security Being Reported on by the Parent Holding Company or Control
         Person.

         N.A.

Item 8.  Identification and Classification of Members of the Group.

         N.A.

Item 9.  Notice of Dissolution of Group.

         N.A.

Item 10. Certifications.

         By  signing  below I  certify  that,  to the best of my  knowledge  and
belief, the securities  referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing  the control of the
issuer of the  securities  and were not acquired and are not held in  connection
with or as a participant in any transaction having that purpose or effect.





                                      -4-



                                    SIGNATURE

             After  reasonable  inquiry  and to the  best  of my  knowledge  and
belief,  I certify  that the  information  set forth in this  statement is true,
complete and correct.

Dated:  March 27, 2003

                                            /s/ Ahmet H. Okumus
                                            -----------------------------------
                                            Ahmet H. Okumus












                                      -5-