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


                                  SCHEDULE 13G

                   Under the Securities Exchange Act of 1934





                               NETEZZA CORPORATION
--------------------------------------------------------------------------------
                                (Name of Issuer)

                    Common Stock, par value $0.001 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    64111N101
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 2007
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to  which this Schedule
13G is filed:

         [ ] Rule 13d-1(b)
         [ ] Rule 13d-1(c)
         [X] Rule 13d-1(d)




*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Charles River Partnership XI, LP

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [X]
        (b) [ ]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

          9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):  N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  OO
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Charles River Friends XI-A, LP

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [X]
        (b) [ ]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

            9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  OO
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.




CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Charles River Friends XI-B, LP

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [X]
        (b) [ ]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  OO
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.




CUSIP No.  92827P102
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Charles River XI GP, LP

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9):  15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  OO
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Charles River XI GP, LLC

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

          9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  OO
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Izhar Armony

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Israel
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

            9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Christopher Baldwin

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

          9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Richard M. Burns, Jr.

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Ted R. Dintersmith

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.






CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Bruce I. Sachs

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      William P. Tai

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101
--------------------------------------------------------------------------------

(1)  Names of Reporting Persons.   I.R.S.  Identification  Nos. of Above Persons
     (entities only):

      Michael J. Zak

--------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions)
        (a) [ ]
        (b) [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
Number of Shares Beneficially Owned
  by Each Reporting Person With       (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        9,055,226*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   9,055,226*
                                          --------------------------------------
--------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person:

           9,055,226*
--------------------------------------------------------------------------------

(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions):   N/A
--------------------------------------------------------------------------------

(11) Percent of Class Represented by Amount in Row (9): 15.8%*
--------------------------------------------------------------------------------

(12) Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.





CUSIP No.  64111N101

Item 1(a).  Name Of Issuer:  Netezza Corporation

Item 1(b).  Address of Issuer's Principal Executive Offices:

            200 Crossing Boulevard, Framingham, MA 01702


Item 2(a).  Name of Person Filing:

            Charles River Partnership XI, LP

          This  Schedule 13G is also filed on behalf of Charles River XI GP, LLC
          ("CR XI GP LLC"),  Charles  River XI GP,  LP ("CR XI GP LP"),  Charles
          River Friends  XI-A,  LP ("CRF XI-A"),  Charles River Friends XI-B, LP
          ("CRF XI-B"), Izhar Armony,  Christopher  Baldwin,  Richard M. Burnes,
          Jr., Ted R. Dintersmith,  Bruce I. Sachs,  William P. Tai, and Michael
          J. Zak. CR XI GP LLC is the  general  partner of CR XI GP LP. CR XI GP
          LLC is also the general  partner of CRF XI-A and CRF XI-B. CR XI GP LP
          is the General  partner of Charles River  Partnership  XI, LP. Each of
          Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak is a
          managing member of CR XI GP LLC.  Information related to each of CR XI
          GP LLC, CR XI GP LP, CRF XI-A, CRF XI-B, and Messrs. Armony,  Baldwin,
          Burnes,  Dintersmith,  Sachs,  Tai, and Zak is set forth on Appendix A
          hereto.


Item 2(b).  Address of Principal Business Office or, if None, Residence:

            c/o Charles River XI GP, LLC
            1000 Winter Street, Suite 3300, Waltham, MA 02451

Item 2(c).  Citizenship:

             Delaware

Item 2(d).  Title of Class of Securities:  Common Stock, par value $0.001 per
                                           share


Item 2(e).  CUSIP No.:   64111N101


Item 3.     If This Statement Is Filed Pursuant to Sections 240.13d-1(b) or
            240.13d-2(b) or (c), check whether the Person Filing is a:

            Not Applicable.


Item 4.     Ownership

            (a) Amount Beneficially Owned(as of December 31, 2007):   9,055,226*

            (b) Percent of Class(as of December 31, 2007):                15.8%*

            (c) Number of Shares as to which the person has:

                (i)  sole power to vote or to direct the vote                 0*

                (ii) shared power to vote or to direct the vote       9,055,226*

                (iii) sole power to dispose or to direct the
                      disposition of                                          0*

                (iv) shared power to dispose or to direct the
                     disposition of                                   9,055,226*

-------------------

* Based on  57,317,181  shares of the common  stock,  par value $0.001 per share
(the "Shares"), of Netezza Corporation,  a Delaware corporation (the "Company"),
outstanding  as of December 7, 2007,  as  disclosed in the  Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended October 31, 2007. Charles River
XI GP, LLC ("CR XI GP LLC") is the  general  partner of Charles  River XI GP, LP
("CR XI GP LP").  CR XI GP LLC is also the  general  partner  of  Charles  River
Friends  XI-A,  LP ("CRF XI-A") and Charles River Friends XI-B, LP ("CRF XI-B").
CR XI GP LP is the general  partner of Charles  River  Partnership  XI, LP ("CRP
XI"). Each of Izhar Armony,  Christopher Baldwin, Richard M. Burnes, Jr., Ted R.
Dintersmith,  Bruce I. Sachs,  William P. Tai,  and Michael J. Zak is a managing
member  of CR XI GP LLC.  CRP XI,  CRF  XI-A  and CRF  XI-B  (collectively,  the
"Partnerships")  form a "group" for purposes of Section 13(d) of the  Securities
Exchange Act of 1934.  As of December 31, 2007,  the  Partnerships  collectively
owned 9,055,226 shares of Netezza Corporation common stock, par value $0.001 per
share (the  "Common  Stock"),  or 15.8% of those  shares of Common  Stock deemed
issued and outstanding as of that date. For the purposes of Rule 13d-3 under the
Securities  Exchange  Act of 1934,  as  amended,  CR XI GP LLC, CR XI GP LP, and
Messrs. Armony, Baldwin, Burnes, Dintersmith, Sachs, Tai, and Zak (collectively,
the "Management Persons") may be deemed to beneficially own the securities owned
by the  Partnerships.  Accordingly,  as of December  31,  2007,  the  Management
Persons may be deemed to beneficially  own 9,055,226 shares of the Common Stock,
or 15.8% of those  shares of Common Stock deemed  issued and  outstanding  as of
that date. Each of the Management Persons disclaims  beneficial ownership of the
securities  reported  herein held by the  Partnerships,  except to the extent of
such person's pecuniary interest in each applicable Partnership, if any.



Item 5.  Ownership of Five Percent or Less of a Class

         Not applicable


Item 6.  Ownership of More Than Five Percent on Behalf of Another Person

         Not Applicable.


Item 7.  Identification  and  Classification  of the  Subsidiary Which  Acquired
         the Security Being Reported on by the Parent Holding Company or Control
         Person

         Not Applicable (See Item 2(a)).


Item 8.  Identification and Classification of Members of the Group

          Charles River  Partnership  XI, LP,  Charles  River Friends XI-A,  LP,
          Charles River Friends XI-B, LP.


Item 9.  Notice of Dissolution of Group

         Not Applicable.


Item 10.  Certification

          This  certification  is not  required  as the filing  person is filing
          pursuant to Rule 13d-1(d).







                                    SIGNATURE
                                    ---------

          After reasonable inquiry and to the best of my  knowledge  and belief,
I certify that the information set forth in this statement is true, complete and
correct.


                                                  February 14, 2008


                                                  /s/ John A. Genest
                                                  -----------------------------_
                                                  John     A.      Genest     as
                                                  attorney-in-fact  for  Charles
                                                  River  XI  GP,  LLC,   general
                                                  partner  of  Charles  River XI
                                                  GP,  LP,  general  partner  of
                                                  Charles River  Partnership XI,
                                                  LP



      Attention:  Intentional misstatements or omissions of fact constitute
                Federal criminal violations (See 18 U.S.C. 1001)





CUSIP No. 92827P102

                                   APPENDIX A


A. Name:                   Charles River Friends XI-A, LP

   Address:                c/o Charles River XI GP, LLC
                           1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Place of
   Organization:           Delaware


B. Name:                   Charles River Friends XI-B, LP

   Address:                c/o Charles River XI GP, LLC
                           1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Place of
   Organization:           Delaware


C. Name:                   Charles River XI GP, LP

   Address:                c/o Charles River XI GP, LLC
                           1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Citizenship:            Delaware


D. Name:                   Charles River XI GP, LLC

   Address:                c/o Charles River XI GP, LLC
                           1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Citizenship:            Delaware


E. Name:                   Izhar Armony

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            Israel


F. Name:                   Christopher Baldwin

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            United States


G. Name:                   Richard M. Burns, Jr.

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            United States


H. Name:                   Ted R. Dintersmith

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            United States


I. Name:                   Bruce I. Sachs

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            United States


J. Name:                   William P. Tai

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            United States


K. Name:                   Michael J. Zak

   Business                c/o Charles River XI GP, LLC
   Address:                1000 Winter Street, Suite 3300,
                           Waltham, MA 02451

   Principal               Managing Member of Charles River XI GP, LLC
   Occupation:

   Citizenship:            United States






CUSIP No. 92827P102

Each of Charles River XI GP, LLC, Charles River XI GP, LP, Charles River Friends
XI-A,  LP, Charles River Friends XI-B,  LP, Izhar Armony,  Christopher  Baldwin,
Richard M. Burnes, Jr., Ted R. Dintersmith,  Bruce I. Sachs, William P. Tai, and
Michael J. Zak hereby agree, by their execution below,  that the Schedule 13G to
which  this  Appendix  A is  attached  is  filed  on  behalf  of each  of  them,
respectively.


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Charles River XI GP, LLC, general partner of
Charles River Friends XI-A, LP


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Charles River XI GP, LLC, general partner of
Charles RiverFriends XI-B, LP


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Charles River XI GP, LLC, general partner of
Charles River XI GP, LP


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Charles River XI GP, LLC


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Izhar Armony


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Christopher Baldwin


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Richard M. Burns, Jr.


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Ted R. Dintersmith


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Bruce I. Sachs


/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
William P. Tai

/s/ John A. Genest
---------------------------------                  February 14, 2008
John A. Genest as attorney-in-fact for
Michael J. Zak