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

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934


                          SPECIALTY LABORATORIES, INC.
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                                (Name of Issuer)

                                  Common Stock
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                         (Title of Class of Securities)

                                    84749R100
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                                 (CUSIP Number)

                                August 24, 2005
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             (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. 84749R100                                            Page 2 of 8 Pages
----------------------                                     ---------------------

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         NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY)
         Bridger Management, LLC
   1
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         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*              (a)[ ]
   2                                                                    (b)[X]
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         SEC USE ONLY
   3
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         CITIZENSHIP OR PLACE OF ORGANIZATION

         Delaware
   4
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                               SOLE VOTING POWER
     
                          5    0
                        --------------------------------------------------------
          
                               SHARED VOTING POWER
                                      
                          6    927,300            
      NUMBER OF         --------------------------------------------------------
       SHARES   
    BENEFICIALLY               SOLE DISPOSITIVE POWER
      OWNED BY  
        EACH              7    0
     REPORTING          --------------------------------------------------------
       PERSON   
        WITH                   SHARED DISPOSITIVE POWER
    
                          8    1,302,400
--------------------------------------------------------------------------------

         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   9                           1,302,400
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         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
         [ ]
  10
--------------------------------------------------------------------------------

         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  11     5.48%
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         TYPE OF REPORTING PERSON*

  12     OO
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                      *SEE INSTRUCTIONS BEFORE FILLING OUT!





                                  SCHEDULE 13G

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

CUSIP NO. 84749R100                                            Page 3 of 8 Pages
----------------------                                     ---------------------

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

         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*              (a)[ ]
   2                                                                    (b)[X]
--------------------------------------------------------------------------------

         SEC USE ONLY
   3
--------------------------------------------------------------------------------

         CITIZENSHIP OR PLACE OF ORGANIZATION

         United States
   4
--------------------------------------------------------------------------------

                               SOLE VOTING POWER
     
                          5    0
                        --------------------------------------------------------
          
                               SHARED VOTING POWER
                                      
                          6    927,300            
      NUMBER OF         --------------------------------------------------------
       SHARES   
    BENEFICIALLY               SOLE DISPOSITIVE POWER
      OWNED BY  
        EACH              7    0
     REPORTING          --------------------------------------------------------
       PERSON   
        WITH                   SHARED DISPOSITIVE POWER
    
                          8    1,302,400
--------------------------------------------------------------------------------

         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   9                           1,302,400
--------------------------------------------------------------------------------

         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
         [ ]
  10
--------------------------------------------------------------------------------

         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  11     5.48%
--------------------------------------------------------------------------------

         TYPE OF REPORTING PERSON*

  12     IN
--------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




                                                              Page 4 of 8 Pages



Item 1(a).        Name of Issuer: Specialty Laboratories, Inc.

Item 1(b).        Address of Issuer's Principal Executive Offices:
                        27027 Tourney Road, Valencia, CA 91355 United States.

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, no par value (the
                  "Common Stock")

Item 2(e).        CUSIP Number:  84749R100

Item 3.     Not Applicable.

Item 4.     Ownership.

            1.    Bridger Management, LLC:

                  (a)   Amount beneficially owned: 1,302,400 shares.
                  (b)   Percent of class: 5.48%. The percentage of Common Stock
                            reported as beneficially owned is based upon
                            23,747,092 shares outstanding as reported by the
                            Issuer on its Quarterly Report on Form 10-Q for the
                            quarter ended June 30, 2005.
                  (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:
                              927,300 shares
                        (iii) Sole power to dispose or to direct the disposition
                              of: 0
                        (iv)  Shared power to dispose or to direct the
                              disposition of: 1,302,400 shares.








                                                               Page 5 of 8 Pages


            2.    Roberto Mignone

                  (a)   Amount beneficially owned: 1,302,400 shares.
                  (b)   Percent of class (determined as set forth in paragraph
                        1(b) of this Item 4): 5.48%
                  (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:
                              927,300 shares
                        (iii) Sole power to dispose or to direct the disposition
                              of: 0
                        (iv)  Shared power to dispose or to direct the
                              disposition of: 1,302,400 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.

            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: August 31, 2005

                                               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: August 31, 2005
                                              By:  /s/ Roberto Mignone                                         
                                                 -------------------------------
                                              Roberto Mignone, individually and
                                              as the managing member of Bridger
                                              Management, LLC