Ownership Submission
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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  TRIDENT CAPITAL MANAGEMENT V LLC
2. Date of Event Requiring Statement (Month/Day/Year)
11/08/2005
3. Issuer Name and Ticker or Trading Symbol
IROBOT CORP [IRBT]
(Last)
(First)
(Middle)
C/O TRIDENT CAPITAL, 505 HAMILTON AVENUE, SUITE 200
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)

PALO ALTO, CA 94301
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
Series E Preferred Stock   (1)   (1) Common Stock 2,038,627 $ (1) I See Footnoe (2)
Series F Preferred Stock   (1)   (1) Common Stock 156,053 $ (1) I See Footnote (2)
Series E Preferred Stock   (1)   (1) Common Stock 1,826,277 $ (1) D (3)  
Series F Preferred Stock   (1)   (1) Common Stock 139,798 $ (1) D (3)  
Series E Preferred Stock   (1)   (1) Common Stock 10,129 $ (1) D (4)  
Series F Preferred Stock   (1)   (1) Common Stock 775 $ (1) D (4)  
Series E Preferred Stock   (1)   (1) Common Stock 10,614 $ (1) D (5)  
Series F Preferred Stock   (1)   (1) Common Stock 813 $ (1) D (5)  
Series E Preferred Stock   (1)   (1) Common Stock 52,859 $ (1) D (6)  
Series F Preferred Stock   (1)   (1) Common Stock 4,046 $ (1) D (6)  
Series E Preferred Stock   (1)   (1) Common Stock 138,748 $ (1) D (7)  
Series F Preferred Stock   (1)   (1) Common Stock 10,621 $ (1) D (7)  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
TRIDENT CAPITAL MANAGEMENT V LLC
C/O TRIDENT CAPITAL
505 HAMILTON AVENUE, SUITE 200
PALO ALTO, CA 94301
    X    
TRIDENT CAPITAL FUND V AFFILIATES FUND LP
C/O TRIDENT CAPITAL
505 HAMILTON AVENUE, SUITE 200
PALO ALTO, CA 94301
    X    
TRIDENT CAPITAL FUND V AFFILIATES FUND Q LP
C/O TRIDENT CAPITAL
505 HAMILTON AVENUE, SUITE 200
PALO ALTO, CA 94301
    X    
TRIDENT CAPITAL FUND V PRINCIPALS FUND L P
C/O TRIDENT CAPITAL
505 HAMILTON AVENUE, SUITE 200
PALO ALTO, CA 94301
    X    
TRIDENT CAPITAL PARALLEL FUND V CV
C/O TRIDENT CAPITAL
505 HAMILTON AVENUE, SUITE 200
PALO ALTO, CA 94301
    X    
TRIDENT CAPITAL FUND V LP
C/O TRIDENT CAPITAL
505 HAMILTON AVENUE, SUITE 200
PALO ALTO, CA 34301
    X    

Signatures

/s/ Bonnie N. Kennedy Managing Director 11/08/2005
**Signature of Reporting Person Date

/s/ Bonnie N. Kennedy, Managing Director, Trident Capital Fund-V Affiliates Fund, L.P. 11/07/2005
**Signature of Reporting Person Date

/s/ Bonnie N. Kennedy, Managing Director, Trident Capital Fund-V Affiliates Fund (Q), L.P. 11/07/2005
**Signature of Reporting Person Date

/s/ Bonnie N. Kennedy, Managing Director, Trident Capital Fund-V Principals Fund, L.P. 11/07/2005
**Signature of Reporting Person Date

/s/ Bonnie N. Kennedy, Managing Director, Trident Capital Parallel Fund-V, C.V. 11/07/2005
**Signature of Reporting Person Date

/s/ Bonnie N. Kennedy, Managing Director, Trident Capital Fund-V, L.P. 11/07/2005
**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 preferred stock is convertible at any time, at the holder's election, on a one-for-one basis and has no expiration date.
(2) Consists of shares held indirectly by Trident Capital Management-V, L.L.C. as sole general partner of Trident Capital Fund-V, L.P., Trident Capital Fund-V Affiliates Fund, L.P., Trident Capital Fund-V Affiliates Fund (Q), L.P., and Trident Capital Fund-V Principals Fund, L.P. and the sole investment general partner of Trident Capital Parallel Fund-V, C.V. and may be deemed to share voting and investment power with respect to all shares held by those entities. Trident Capital Management-V, L.L.C. disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest, if any, and this report shall not be deemed an admission that the reporting person is the beneficial owner of all of the reported shares for purposes of Section 16 or any other purpose.
(3) Consists of shares owned by Trident Capital Fund-V, L.P.
(4) Consists of shares owned by Trident Capital Fund-V Affiliates Fund (Q), L.P.
(5) Consists of shares owned by Trident Capital Fund-V Affiliates Fund, L.P.
(6) Consists of shares owned by Trident Capital Fund-V Principals Fund, L.P.
(7) Consists of shares owned by Trident Capital Parallel Fund-V, C.V.

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