SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Donnini David (Last) (First) (Middle) C/O SYNIVERSE HOLDINGS, INC. 8125 HIGHWOODS PALM WAY (Street) TAMPA FL 33647 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol SYNIVERSE HOLDINGS INC [ SVR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 08/20/2008
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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	08/20/2008		S		107,526(1)	D	$17.57(2)	367,431	I	See footnotes(3)(4)
Common Stock, par value $0.001 per share	08/21/2008		S		74,224(1)	D	$17.36(2)	293,207	I	See footnotes(3)(4)
Common Stock, par value $0.001 per share	08/20/2008		S		286(5)	D	$17.57(6)	976	I	See footnotes(3)(7)
Common Stock, par value $0.001 per share	08/21/2008		S		197(5)	D	$17.36(6)	779	I	See footnotes(3)(7)
Common Stock, par value $0.001 per share	08/20/2008		S		1,212(8)	D	$17.57(9)	4,144	I	See footnotes(3)(10)
Common Stock, par value $0.001 per share	08/21/2008		S		837(8)	D	$17.36(9)	3,307	I	See footnotes(3)(10)
Common Stock, par value $0.001 per share								2,619,083	I	See footnotes(3)(11)
Common Stock, par value $0.001 per share								1,307,756	I	See footnotes(3)(12)
Common Stock, par value $0.001 per share								35,950	I	See footnotes(3)(13)
Common Stock, par value $0.001 per share								66,250	I	See footnotes(3)(14)

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Reflects shares received by GTCR Partners VII, L.P. ("GTCR Partners VII") as a result of pro rata distributions from GTCR Fund VII, L.P. ("Fund VII") and GTCR Fund VII/A, L.P. ("Fund VII/A") that were exempt from Section 16 of the Securities Exchange Act of 1934, as amended, pursuant to Rule 16a-13 promulgated thereunder.

2. Represents the weighted average price of the shares sold. The prices actually received ranged from (i) $17.24 to $17.80 for sales occurring on August 20, 2008 and (ii) $17.20 to $17.54 for sales occurring on August 21, 2008. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

3. The Reporting Person expressly disclaims beneficial ownership of the shares reported in Table I, except to the extent of his pecuniary interest therein. The filing of this form shall not be deemed an admission that the Reporting Person is, for Section 16 purposes or otherwise, the beneficial owner of such shares.

4. Reflects shares held directly by GTCR Partners VII. GTCR Golder Rauner, L.L.C. ("GTCR") is the general partner of GTCR Partners VII. As such, GTCR may be deemed to be the beneficial owner of such shares. GTCR is managed by its members. The Reporting Person is a member of GTCR and may be deemed to have an indirect pecuniary interest in the shares owned by GTCR Partners VII to the extent of the Reporting Person's indirect proportionate interest in GTCR Partners VII.

5. 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.

6. Represents the weighted average price of the shares sold. The prices actually received ranged from (i) $17.25 to $17.77 for sales occurring on August 20, 2008 and (ii) $17.20 to $17.54 for sales occurring on August 21, 2008. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

7. Reflects shares held directly by Mezzanine Partners. GTCR Partners VI, L.P. ("GTCR Partners VI") is the general partner of Mezzanine Partners. GTCR is the general partner of GTCR Partners VI. As such, GTCR may be deemed to be the beneficial owner of such shares. GTCR is managed by its members. The Reporting Person is a member of GTCR and may be deemed to have an indirect pecuniary interest in the shares owned by Mezzanine Partners to the extent of the Reporting Person's indirect proportionate interest in Mezzanine Partners.

8. Reflects shares received by GTCR as a result of pro rata distributions from GTCR Co-Invest, L.P. ("Co-Invest") that were exempt from Section 16 of the Securities Exchange Act of 1934, as amended, pursuant to Rule 16a-13 promulgated thereunder.

9. Represents the weighted average price of the shares sold. The prices actually received ranged from (i) $17.24 to $17.80 for sales occurring on August 20, 2008 and (ii) $17.20 to $17.54 for sales occurring on August 21, 2008. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

10. Reflects shares held directly by GTCR. GTCR is managed by its members. The Reporting Person is a member of GTCR and may be deemed to have an indirect pecuniary interest in the shares owned by GTCR to the extent of the Reporting Person's indirect proportionate interest in GTCR.

11. Fund VII is the direct beneficial owner of such shares. GTCR Partners VII is the general partner of Fund VII and GTCR is the general partner of GTCR Partners VII. As such, GTCR Partners VII and GTCR may be deemed to be beneficial owners of such shares. GTCR is managed by its members. The Reporting Person is a member of GTCR and GTCR Partners VII and may be deemed to have an indirect pecuniary interest in the shares owned by Fund VII to the extent of the Reporting Person's indirect proportionate interest in Fund VII.

12. Fund VII/A is the direct beneficial owner of such shares. GTCR Partners VII is the general partner of Fund VII/A and GTCR is the general partner of GTCR Partners VII. As such, GTCR Partners VII and GTCR may be deemed to be beneficial owners of such shares. GTCR is managed by its members. The Reporting Person is a member of GTCR and GTCR Partners VII and may be deemed to have an indirect pecuniary interest in the shares owned by Fund VII/A to the extent of the Reporting Person's indirect proportionate interest in Fund VII/A.

13. Co-Invest is the direct beneficial owner of such shares. GTCR is the general partner of Co-Invest. As such, GTCR may be deemed to be a beneficial owner of such shares. GTCR is managed by its members. The Reporting Person is a member of GTCR and may be deemed to have an indirect pecuniary interest in the shares owned by Co-Invest to the extent of the Reporting Person's indirect proportionate interest in Co-Invest.

14. Capital Partners is the direct beneficial owner of such shares. Mezzanine Partners is the general partner of Capital Partners. GTCR Partners VI is the general partner of Mezzanine Partners. 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 such shares. GTCR is managed by its members. The Reporting Person is a member of GTCR, Mezzanine Partners and GTCR Partners VI and may be deemed to have an indirect pecuniary interest in the shares owned by Capital Partners to the extent of the Reporting Person's indirect proportionate interest in Capital Partners.

	/s/ Jody S. Gale under a Power of Attorney	08/22/2008
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.