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 * OBRIEN MICHAEL J   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 __X__ Officer (give title below) _____ Other (specify below) SVP, Bus. Devpt. (Last) (First) (Middle) C/O SYNIVERSE HOLDINGS, INC., 8125 HIGHWOODS PALM WAY 3. Date of Earliest Transaction (Month/Day/Year) 01/13/2011 (Street) TAMPA, FL 33647 4. If Amendment, Date 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 (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 01/13/2011   D(1)   19,766 D (1) 0 D

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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

Employee stock option (right to buy)

$ 16.35

01/13/2011

D(2)

5,000

(3)

04/25/2018

Common Stock

5,000

$ 0

0

D

Employee stock option (right to buy)

$ 12.98

01/13/2011

D(2)

5,000

(4)

04/27/2019

Common Stock

5,000

$ 0

0

D

Employee stock option (right to buy)

$ 14.84

01/13/2011

D(2)

13,850

(5)

08/10/2016

Common Stock

13,850

$ 0

0

D

Employee stock option (right to buy)

$ 16.68

01/13/2011

D(2)

7,800

(6)

02/17/2017

Common Stock

7,800

$ 0

0

D

Employee stock option (right to buy)

$ 21.65

01/13/2011

D(2)

6,510

(7)

08/05/2017

Common Stock

6,510

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
OBRIEN MICHAEL J C/O SYNIVERSE HOLDINGS, INC. 8125 HIGHWOODS PALM WAY TAMPA, FL 33647			SVP, Bus. Devpt.

Signatures

/s/ Laura E. Binion, under a power of attorney		01/14/2011
**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)	The shares of common stock, including restricted stock, were cancelled pursuant to the Agreement and Plan of Merger with Buccaneer Holdings, Inc. and Buccaneer Merger Sub, Inc., dated as of October 28, 2010 (the "Merger Agreement"), in exchange for a cash payment in the amount of $31.00 per share.
(2)	The options, whether vested or unvested, were cancelled pursuant to the Merger Agreement in exchange for a cash payment in the amount of $31.00 per share less the exercise price of the option.
(3)	The options vest in three equal annual installments on each of April 25, 2009, April 25, 2010 and April 25, 2011.
(4)	The options vest in three equal annual installments on each of April 25, 2010, April 25, 2011 and April 25, 2012.
(5)	The options vest in three equal annual installments on each of August 10, 2010, August 10, 2011 and August 10, 2012.
(6)	The options vest in three equal annual installments on each of February 17, 2011, February 17, 2012 and February 17, 2013.
(7)	The option vests in three equal installments on each of August 5, 2011, August 5, 2012 and August 5, 2013.

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