FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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

OMB APPROVAL OMB Number: 3235-0104 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person *   KRUPKA MICHAEL A 2. Date of Event Requiring Statement (Month/Day/Year) 05/23/2006 3. Issuer Name and Ticker or Trading Symbol VONAGE HOLDINGS CORP [VG] (Last) (First) (Middle) C/O BAIN CAPITAL VENTURE PARTNERS, LLC, 111 HUNTINGTON AVE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) BOSTON, MA 02199 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
	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 control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
1) Series E Convertible Preferred Stock	  (1)	  (1)	Common stock, par value $0.001 per share	2,001,647 (5)	$ (1)	I	See Footnotes (2) (3) (4)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
KRUPKA MICHAEL A C/O BAIN CAPITAL VENTURE PARTNERS, LLC 111 HUNTINGTON AVE BOSTON, MA 02199	Â	  X	Â	Â
BAIN CAPITAL VENTURE FUND 2005, L.P. 111 HUNTINGTON AVENUE BOSTON, MA 02199	Â	  X	Â	Â
BAIN CAPITAL VENTURE PARTNERS 2005, L.P. 111 HUNTINGTON AVENUE BOSTON, MA 02199	Â	  X	Â	Â
BAIN CAPITAL VENTURE INVESTORS, LLC 111 HUNTINGTON AVENUE BOSTON, MA 02199	Â	  X	Â	Â
BAIN CAPITAL INVESTORS LLC 111 HUNTINGTON AVENUE BOSTON, MA 02199	Â	  X	Â	Â

Signatures

/s/ Michael A. Krupka		05/23/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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 convertible preferred stock is immediately convertible on a 1:2.86 basis and has no expiration date. The convertible preferred stock automatically converts to Common Stock upon the closing of the offering.
(2)	Shares include (i) 1,747,634 shares upon conversion of preferred stock owned by Bain Capital Venture Fund 2005, L.P. ("Bain Venture Fund"), whose sole general partner is Bain Capital Venture Partners 2005, L.P. ("BCVP"), whose sole general partner is Bain Capital Venture Investors, LLC ("BCVI"), (ii) 247,371 shares issuable upon conversion of preferred stock owned by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III, whose sole managing general partner is Bain Capital Investors, LLC ("BCI") and whose attorney-in-fact with respect to such shares is BCVI, and (iii) 6,642 shares issuable upon conversion of preferred stock owned by BCIP Associates III-B, LLC ("BCIP III-B," and together with BCIP III, the "BCIP Entities"), (Continued to Footnote 3)
(3)	whose manager is BCIP Associates III-B, whose sole managing partner is BCI and whose attorney-in-fact with respect to such shares is BCVI. Michael A. Krupka is (a) the sole managing member of BCVI, (b) a limited partner of BCVP and (c) a general partner of BCIP Associates III. Mr. Krupka and the entities listed above other than record holders of the shares listed above may each be deemed to share voting and dispositive power with respect to these shares, but each disclaims beneficial ownership of such shares except to the extent of their pecuniary interests therein.
(4)	Following consummation of the Issuer's initial public offering, the reporting persons herein will cease to hold, directly or indirectly, more than 10% of any class of any equity security of the issuer (determined in accordance with the rules for determining beneficial ownership under Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) and therefore will no longer be subject to the disclosure and other requirements of Section 16 of the Exchange Act.
(5)	Additional shares may be issuable upon conversion of the notes if the Issuer elects to pay interest on the notes in kind by increasing the principal outstanding under the notes.

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

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.