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

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934


                                SINA CORPORATION
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    G81477104
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                  July 5, 2006
--------------------------------------------------------------------------------
             (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 filed 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
disclosures provided in a prior cover page.

The information required on 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

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

CUSIP NO. G81477104                                           Page 2 of 8 Pages
----------------------------------------   -------------------------------------


--------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY).

     Bridger Management, LLC
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) |_|
                                                                         (b) |X|
--------------------------------------------------------------------------------
3    SEC USE ONLY


--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware
--------------------------------------------------------------------------------
               5    SOLE VOTING POWER

                    0
               -----------------------------------------------------------------
  NUMBER OF    6    SHARED VOTING POWER
   SHARES
BENEFICIALLY        2,747,600
  OWNED BY     -----------------------------------------------------------------
    EACH       7    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON           0
    WITH       -----------------------------------------------------------------
               8    SHARED DISPOSITIVE POWER

                    2,747,600
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     2,747,600
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*   |_|

--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     5.13%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*

     OO
--------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




                                  SCHEDULE 13G

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

CUSIP NO. G81477104                                           Page 3 of 8 Pages
----------------------------------------   -------------------------------------


--------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY).

     Roberto  Mignone
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) |_|
                                                                         (b) |X|
--------------------------------------------------------------------------------
3    SEC USE ONLY


--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     United States
--------------------------------------------------------------------------------
               5    SOLE VOTING POWER

                    0
               -----------------------------------------------------------------
  NUMBER OF    6    SHARED VOTING POWER
   SHARES
BENEFICIALLY        2,747,600
  OWNED BY     -----------------------------------------------------------------
    EACH       7    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON           0
    WITH       -----------------------------------------------------------------
               8    SHARED DISPOSITIVE POWER

                    2,747,600
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     2,747,600
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*   |_|

--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     5.13%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*

     IN
--------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




                                                               Page 4 of 8 Pages



Item 1(a).        Name of Issuer: SINA Corporation

Item 1(b).        Address of Issuer's Principal Executive Offices:
                        Room 1802, United Plaza, 1468 Nan Jing Road West,
                        Shanghai 200040, China

Item 2(a, b, c).  Name of Persons Filing, Address of Principal Business Office,
                  Citizenship:

                  Bridger Management, LLC, a Delaware limited liability company
                  and Mr. Roberto Mignone ("Mr. Mignone"), each having offices
                  at 101 Park Avenue - 48th Floor, New York, NY 10178. Mr.
                  Mignone is a United States citizen.

Item 2(d).        Title of Class of Securities:  Common Stock, par value $0.133
                  per share (the "Common Stock")

Item 2(e).        CUSIP Number:  G81477104

Item 3.     Not Applicable.

Item 4.     Ownership.

            1.    Bridger Management, LLC:

                  (a)   Amount beneficially owned: 2,747,600 shares.
                  (b)   Percent of class: 5.13%. The percentage of Common Stock
                        reported as beneficially owned is based upon 53,529,031
                        shares outstanding as reported by the Issuer on its
                        Quarterly Report on Form 10-Q for the quarter ended
                        March 31, 2006.
                  (c)   Number of shares as to which such person  has:
                        (i)   Sole power to vote or to direct the vote: 0
                        (ii)  Shared  power  to  vote  or to  direct  the  vote:
                              2,747,600 shares
                        (iii) Sole power to dispose or to direct the disposition
                              of: 0
                        (iv)  Shared   power  to   dispose   or  to  direct  the
                              disposition of: 2,747,600 shares.




                                                               Page 5 of 8 Pages

            2.    Roberto Mignone

                  (a)   Amount beneficially owned: 2,747,600 shares.
                  (b)   Percent of class (determined as set forth in paragraph
                        1(b) of this Item 4): 5.13%
                  (c)   Number of shares as to which such person has:
                        (i)   Sole power to vote or to direct the vote: 0
                        (ii)  Shared power to vote or to direct the vote:
                              2,747,600 shares
                        (iii) Sole power to dispose or to direct the disposition
                              of: 0
                        (iv)  Shared power to dispose or to direct the
                              disposition of: 2,747,600 shares.


The  Common  Stock  reported  herein  is  beneficially  owned as a result of the
purchase of such shares by certain accounts managed by Bridger Management,  LLC.
Mr. Mignone is the managing member of Bridger Management, LLC.



Item 5.     Ownership of Five Percent or less of a Class:

            If this  statement  is being filed to report the fact that as of the
            date  hereof the  reporting  person has ceased to be the  beneficial
            owner of more than five  percent of the class of  securities,  check
            the following |_|.

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

            The Common Stock reported herein is held by certain accounts managed
            by Bridger Management, LLC. No such interest relates to more than 5%
            of the class.

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

            Not Applicable.

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

            Not applicable.

Item 9.     Notice of Dissolution of Group.

            Not Applicable.


                                                               Page 6 of 8 Pages


Item 10.    Certification.

                  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.

                            [SIGNATURE PAGE FOLLOWS:]




                                                               Page 7 of 8 Pages



                                    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: July 12, 2006

                                        BRIDGER MANAGEMENT LLC

                                        By:  /s/ Roberto Mignone
                                           ----------------------------------
                                        Roberto Mignone, Managing Member



                                         /s/ Roberto Mignone
                                         ------------------------------------
                                        Roberto Mignone, Individually





                                                               Page 8 of 8 Pages


EXHIBIT 1

JOINT ACQUISITION STATEMENT PURSUANT TO RULE 13d-1(k)

      The  undersigned  acknowledge  and agree that the  foregoing  statement on
Schedule  13G is  filed  on  behalf  of each of the  undersigned  and  that  all
subsequent amendments to this statement on Schedule 13G shall be filed on behalf
of each of the  undersigned  without the  necessity of filing  additional  joint
acquisition   statements.   The  undersigned  acknowledge  that  each  shall  be
responsible for the timely filing of such  amendments,  and for the completeness
and accuracy of the  information  concerning  him or it contained  therein,  but
shall not be responsible  for the  completeness  and accuracy of the information
concerning the others, except to the extent that he or it knows or has reason to
believe that such information is inaccurate.



DATED: July 12, 2006
                                              By:  /s/ Roberto Mignone
                                                 -------------------------------

                                              Roberto Mignone, individually and
                                              as the managing member of Bridger
                                              Management, LLC