Schedule 13G

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No.    )*

SYNIVERSE HOLDINGS, INC.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
87163F106
(CUSIP Number)
March 16, 2009
(Date of Event Which Requires Filing of this Statement)

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

     o Rule 13d-1(b)

     þ Rule 13d-1(c)

     o 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).

 
 

 

                     
CUSIP No.
  
87163F106 
  

 

           
1   NAMES OF REPORTING PERSONS
Highside Capital Management, L.P.
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)   o
  (b)   þ
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   4,300,000
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   4,300,000
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  4,300,000
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  6.3%
     
12   TYPE OF REPORTING PERSON
   
  PN/IA

 

                     
CUSIP No.
  
87163F106 
  

 

           
1   NAMES OF REPORTING PERSONS
Highside Management, LLC
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)   o
  (b)   þ
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   4,300,000
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   4,300,000
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  4,300,000
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  6.3%
     
12   TYPE OF REPORTING PERSON
   
  OO

 

                     
CUSIP No.
  
87163F106 
  

 

           
1   NAMES OF REPORTING PERSONS
H. Lee S. Hobson
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)   o
  (b)   þ
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  United States
       
  5   SOLE VOTING POWER
     
NUMBER OF   4,300,000
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   4,300,000
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  4,300,000
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  6.3%
     
12   TYPE OF REPORTING PERSON
   
  IN

 

Item 1.
(a) Name of Issuer
SYNIVERSE HOLDINGS, INC.
(b) Address of Issuer’s Principal Executive Offices
8125 Highwoods Palm Way, Tampa, Florida 33647
Item 2.
(a) Name of Person Filing
This statement is jointly filed by and on behalf of Highside Capital Management, L.P., Highside Management, LLC, and H. Lee S. Hobson. Highside Capital serves as an investment adviser and/or manager to other persons. Highside Capital may be deemed to beneficially own securities owned and/or held by and/or for the account and/or benefit of other persons. Highside Management is the general partner of Highside Capital. Highside Management may be deemed to beneficially own securities owned and/or held by and/or for the account and/or benefit of Highside Capital. Mr. Hobson is the President and managing member of Highside Management. Mr. Hobson may be deemed to beneficially own securities owned and/or held by and/or for the account and/or benefit of Highside Management.
Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, the beneficial owner of any securities covered by this statement.
Each reporting person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for the purposes of Section 13(d) or 13(g) of the Act. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the issuer or otherwise with respect to the issuer or any securities of the issuer or (ii) a member of any group with respect to the issuer or any securities of the issuer.
(b) Address of Principal Business Office or, if none, Residence
The address of the principal business office of each reporting person is 100 Crescent Court, Suite 860, Dallas, Texas 75201.
(c) Citizenship
See Item 4 on the cover page(s) hereto.
(d) Title of Class of Securities
Common Stock
(e) CUSIP Number
87163F106

 

 

 

Item 3.  
If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is:
  (a) o
A Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o).
 
  (b) o
A Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c).
 
  (c) o
An insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c).
 
  (d) o
An investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
 
  (e) o
An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
 
  (f) o
An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
 
  (g) o
A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);
 
  (h) o
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
 
  (i) o
A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
 
  (j) o
A group, in accordance with §240.13d-1(b)(1)(ii)(J).
Item 4. Ownership.
(a) Amount beneficially owned: See Item 9 on the cover page(s) hereto.
(b) Percent of class: See Item 11 on the cover page(s) hereto.
(c) Number of shares as to which such person has:
  (i)  
Sole power to vote or to direct the vote: See Item 5 on the cover page(s) hereto.
 
  (ii)  
Shared power to vote or to direct the vote: See Item 6 on the cover page(s) hereto.
 
  (iii)  
Sole power to dispose or to direct the disposition of: See Item 7 on the cover page(s) hereto.
 
  (iv)  
Shared power to dispose or to direct the disposition of: See Item 8 on the cover page(s) hereto.
Item 5. Ownership of 5% 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 o.

 

 

 

Item 6. Ownership of More than 5 Percent on Behalf of Another Person.
Other persons are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities covered by this statement.
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
Item 10. Certifications.
(a) Not Applicable
(b) 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
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.
         
  Highside Capital Management, L.P.
 		  
  By:   Highside Management, LLC    
    Title: General Partner   
     
  By:   /s/ H. Michael Reese    
    Name:   H. Michael Reese   
    Title:  
Date:		 Vice President
March 26, 2009		  
 
  Highside Management, LLC
 		  
  By:   /s/ H. Michael Reese    
    Name:   H. Michael Reese   
    Title:  
Date:		 Vice President
March 26, 2009		  
 
  H. Lee S. Hobson
 		  
  By:   /s/ H. Lee S. Hobson    
    Name:   H. Lee S. Hobson   
    Date:  March 26, 2009  

 

 

 

         
EXHIBIT INDEX
         
Exhibit   Description of Exhibit
  99.1    
Joint Filing Agreement (furnished herewith)