-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, VQvASFreHOa6bVSDXk/arAwCmHgUm2EA1Kx/eslz95uWaeeFNLDfqYYTY6gmcmFM EcraGwdQJBmg6j9N8ms4+Q== 0000905718-10-000015.txt : 20100120 0000905718-10-000015.hdr.sgml : 20100120 20100120160145 ACCESSION NUMBER: 0000905718-10-000015 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20100120 DATE AS OF CHANGE: 20100120 GROUP MEMBERS: BRUCE I. SACHS GROUP MEMBERS: CHARLES RIVER FRIENDS XI-A, LP GROUP MEMBERS: CHARLES RIVER FRIENDS XI-B, LP GROUP MEMBERS: CHARLES RIVER XI GP, LLC GROUP MEMBERS: CHARLES RIVER XI GP, LP GROUP MEMBERS: CHRISTOPHER BALDWIN GROUP MEMBERS: IZHAR ARMONY GROUP MEMBERS: MICHAEL J. ZAK GROUP MEMBERS: RICHARD M. BURNES, JR. GROUP MEMBERS: TED R. DINTERSMITH GROUP MEMBERS: WILLIAM P. TAI FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: CHARLES RIVER PARTNERSHIP XI LP CENTRAL INDEX KEY: 0001126481 IRS NUMBER: 000000000 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: STE 3300 CITY: WALTHAM STATE: MA ZIP: 02451 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: BigBand Networks, Inc. CENTRAL INDEX KEY: 0001381325 STANDARD INDUSTRIAL CLASSIFICATION: RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT [3663] IRS NUMBER: 043444278 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-83242 FILM NUMBER: 10536337 BUSINESS ADDRESS: STREET 1: 475 BROADWAY CITY: REDWOOD CITY STATE: CA ZIP: 94063 BUSINESS PHONE: 650-995-5000 MAIL ADDRESS: STREET 1: 475 BROADWAY CITY: REDWOOD CITY STATE: CA ZIP: 94063 SC 13G/A 1 bigband13gam1.txt SC13GAM1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Amendment No. 1)* Under the Securities Exchange Act of 1934 BIGBAND NETWORKS, INC. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, par value $0.001 per share - -------------------------------------------------------------------------------- (Title of Class of Securities) 089750509 - -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2009 - -------------------------------------------------------------------------------- (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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): OO - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): OO - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): OO - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): OO - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): OO - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (1) Names of Reporting Persons. I.R.S. Identification Nos. of Above Persons (entities only): Richard M. Burnes, 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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 - -------------------------------------------------------------------------------- (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: 3,793,991* -------------------------------------- (7) Sole Dispositive Power: 0* -------------------------------------- (8) Shared Dispositive Power: 3,793,991* -------------------------------------- - -------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,793,991* - -------------------------------------------------------------------------------- (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): 5.7%* - -------------------------------------------------------------------------------- (12) Type of Reporting Person (See Instructions): IN - -------------------------------------------------------------------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 089750509 Item 1(a). Name Of Issuer: BigBand Networks, Inc. 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.: 089750509 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, 2009): 3,793,991* (b) Percent of Class(as of December 31, 2009): 5.7%* (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 3,793,991* (iii) sole power to dispose or to direct the disposition of 0* (iv) shared power to dispose or to direct the disposition of 3,793,991* 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). - ------------------- *Based on 66,425,618 shares of the common stock, par value $0.001 per share (the "Common Stock"), of BigBand Networks, Inc., a Delaware corporation (the "Company"), outstanding as of November 1, 2009, as disclosed in the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009. 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, 2009, the Partnerships collectively owned 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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, 2009, the Management Persons may be deemed to beneficially own 3,793,991 shares of the Common Stock, or 5.7% of those shares of the 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. 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. January 14, 2010 /s/ Sarah Reed -------------------------------------- Sarah Reed 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. 089750509 APPENDIX A A. Name: Charles River Friends XI-A, LP Address of Principal: 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 of Principal: 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 of Principal: 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 of Principal: c/o Charles River XI GP, LLC 1000 Winter Street, Suite 3300 Waltham, MA 02451 Citizenship: Delaware E. Name: Izhar Armony Address of Principal Business Office: c/o Charles River XI GP, LLC 1000 Winter Street, Suite 3300 Waltham, MA 02451 Principal Managing Member of Charles River XI GP, LLC Occupation: Citizenship: Israel F. Name: Christopher Baldwin Address of Principal Business Office: c/o Charles River XI GP, LLC 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. Burnes, Jr. Address of Principal Business Office: c/o Charles River XI GP, LLC 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. 089750509 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 Amendment No. 1 to which this Appendix A is attached is filed on behalf of each of them, respectively. /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Charles River XI GP, LLC, general partner of Charles River Friends XI-A, LP /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Charles River XI GP, LLC, general partner of Charles RiverFriends XI-B, LP /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Charles River XI GP, LLC, general partner of Charles River XI GP, LP /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Charles River XI GP, LLC /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Izhar Armony /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Christopher Baldwin /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Richard M. Burnes, Jr. /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Ted R. Dintersmith /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Bruce I. Sachs /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for William P. Tai /s/ Sarah Reed - --------------------------------- January 14, 2010 Sarah Reed as attorney-in-fact for Michael J. Zak -----END PRIVACY-ENHANCED MESSAGE-----