FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * GTCR MEZZANINE PARTNERS LP   2. Issuer Name and Ticker or Trading Symbol SYNIVERSE HOLDINGS INC [SVR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) __X__ Other (specify below) See remarks below (Last) (First) (Middle) C/O GTCR GOLDER RAUNER, L.L.C., SEARS TOWER #6100 3. Date of Earliest Transaction (Month/Day/Year) 08/18/2008 (Street) CHICAGO, IL 60606-6402 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.001 per share 08/19/2008   S   10 (1) D $ 17.13 1,301 D   Common Stock, par value $0.001 per share 08/19/2008   S   8 (1) D $ 17.12 1,293 D   Common Stock, par value $0.001 per share 08/19/2008   S   5 (1) D $ 17.11 1,288 D   Common Stock, par value $0.001 per share 08/19/2008   S   7 (1) D $ 17.1 1,281 D   Common Stock, par value $0.001 per share 08/19/2008   S   12 (1) D $ 17.09 1,269 D   Common Stock, par value $0.001 per share 08/19/2008   S   3 (1) D $ 17.07 1,266 D   Common Stock, par value $0.001 per share 08/19/2008   S   1 (1) D $ 17.06 1,265 D   Common Stock, par value $0.001 per share 08/19/2008   S   3 (1) D $ 17.05 1,262 D   Common Stock, par value $0.001 per share               66,250 I See footnote (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
GTCR MEZZANINE PARTNERS LP C/O GTCR GOLDER RAUNER, L.L.C. SEARS TOWER #6100 CHICAGO, IL 60606-6402				See remarks below
GTCR PARTNERS VI L P C/O GTCR GOLDER RAUNER, L.L.C. SEARS TOWER #6100 CHICAGO, IL 60606-6402				See remarks below
GTCR GOLDER RAUNER LLC C/O GTCR GOLDER RAUNER, LLC SEARS TOWER #6100 CHICAGO, IL 60606-6402				See remarks below

Signatures

/s/ Jody S. Gale under a Power of Attorney		08/20/2008
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Reflects shares received by GTCR Mezzanine Partners, L.P. ("Mezzanine Partners") as a result of pro rata distributions from GTCR Capital Partners, L.P. ("Capital Partners") that were exempt from Section 16 of the Securities Exchange Act of 1934, as amended, pursuant to Rule 16a-13 promulgated thereunder.
(2)	Reflects 66,250 shares held directly by Capital Partners. Mezzanine Partners is the general partner of Capital Partners. GTCR Partners VI, L.P. ("GTCR Partners VI") is the general partner of Mezzanine Partners and GTCR Golder Rauner, L.L.C. ("GTCR") is the general partner of GTCR Partners VI. As such, Mezzanine Partners, GTCR Partners VI and GTCR may be deemed to be beneficial owners of the 66,250 shares reported in Table I. Mezzanine Partners, GTCR Partners VI and GTCR expressly disclaim beneficial ownership of such shares reported in Table I, except to the extent of their pecuniary interest therein. The filing of this form shall not be deemed an admission that Mezzanine Partners, GTCR Partners VI or GTCR is, for Section 16 purposes or otherwise, the beneficial owner of such shares, except to the extent of their pecuniary interest therein.
Remarks: The Reporting Person may be deemed a director by virtue of its members serving on the board of directors of Syniverse Holdings, Inc. This is 2 of 2 reports relating to sale transactions occurring on August 18, 2008 and August 19, 2008.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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