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

                                    Form 13F

                               FORM 13F COVER PAGE


Report for the Calendar Year or Quarter Ended:    06/30/08

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:             SC X Management, LLC
Address:          3000 Sand Hill Road
                  Bldg 4, Suite 180
                  Menlo Park, CA  94025

Form 13F File Number:      28-12108

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:    Michael Moritz
Title:   Managing Member
Phone:   (650) 854-3927

Signature, Place, and Date of Signing:

Michael Moritz             Menlo Park, California             08/07/08

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).)









                              FORM 13F SUMMARY PAGE


Report Summary:

Number of Other Included Managers:                           0
Form 13F Information Table Entry Total:                      4
Form 13F Information Table Value Total:              $ 121,781
(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.

NONE







                                      SC X MANAGEMENT, LLC
                                  FORM 13F INFORMATION TABLE
                                         AS OF 06/30/08




                       TITLE                 VALUE    SHARES/    SH/  PUT/  INVSTMT  OTHER      VOTING AUTHORITY
NAME OF ISSUER        OF CLASS   CUSIP     (X$1000)   PRN AMT    PRN  CALL  DSCRETN MANAGERS  SOLE    SHARED  NONE
- -------------------  ----------  ------    --------  --------    ---  ----  ------- --------  ------  ------  ----
                                                                             

ALCATEL		     ADR	 013904305      894     148,083   SH	      SOLE		 148,083
ARUBA NETWORKS INC.  COMMON	 043176106   69,120  13,216,047   SH	      SOLE	      13,216,047
ISILON SYSTEMS INC.  COMMON	 46432L104   51,733  11,651,603   SH	      SOLE	      11,651,603
OPNEXT		     COMMON	 68375V105       34	  6,362   SH	      SOLE	           6,362