- Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Armony Izhar	2. Issuer Name and Ticker or Trading Symbol BigBand Networks, Inc. [ BBND ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __ X __ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) 1000 WINTER STREET, SUITE 3300	3. Date of Earliest Transaction (MM/DD/YYYY) 11/23/2009
(Street) WALTHAM, MA 02451 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/23/2009		S		43400 ⁽¹⁾	D	$3.7074	8919770 ⁽²⁾ ⁽³⁾ ⁽⁴⁾	I	See Footnotes (2)(3)(4)

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
( 1)	Represents 42,113 shares sold by Charles River Partnership XI, LP ("CRP XI"), 1,064 shares sold by Charles River Friends XI-A, LP ("CRF XI-A") and 223 shares sold by Charles River Friends XI-B, LP ("CRF XI-B").
( 2)	Represents 42,113 shares sold by Charles River Partnership XI, LP ("CRP XI"), 1,064 shares sold by Charles River Friends XI-A, LP ("CRF XI-A") and 223 shares sold by Charles River Friends XI-B, LP ("CRF XI-B").
( 3)	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 CRF XI-A and CRF XI-B. CR XI GP LP is the General Partner of CRP XI. 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. 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. Accordingly, each of CR XI GP LP, CR XI GP LLC 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.
( 4)	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. The filing of this statement by any reporting person shall not be deemed an admission that such person is, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the beneficial owner of any equity securities covered by this statement.

Remarks:
Each of Charles River Partnership XI, LP, Charles River Friends XI-A, LP, Charles River Friends XI-B, LP, Charles River XI GP, LP, and Charles River XI GP, LLC (the "Charles River Entities") is also a reporting person. Because the SEC's filing system will not accept CIK and CCC codes from more than ten joint filers of a report, the Charles River Entities have filed separately from this Form 4. Such other Form 4 and this Form 4 relate to the same securities and transactions. Thus, in total, there are twelve (12) joint filers: Charles River Partnership XI, LP, Charles River Friends XI-A, LP, Charles River Friends XI-B, LP, Charles River XI GP, LP, Charles River XI GP, LLC, Izhar Armony, Christopher Baldwin, Richard M. Burnes, Jr., Ted R. Dintersmith, Bruce I. Sachs, William P. Tai, and Michael J. Zak.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Armony Izhar 1000 WINTER STREET SUITE 3300 WALTHAM, MA 02451		X
Baldwin Christopher 1000 WINTER STREET SUITE 3300 WALTHAM, MA 02451		X
BURNES RICHARD M JR 1000 WINTER STREET SUITE 3300 WALTHAM, MA 02451		X
Dintersmith Ted R 1000 WINTER STREET SUITE 3300 WALTHAM, MA 02451		X
SACHS BRUCE I 1000 WINTER STREET SUITE 3300 WALTHAM, MA 02451		X
TAI WILLIAM 2800 SAND HILL ROAD SUITE 150 MENLO PARK, CA 94025		X
Zak Michael J 1000 WINTER STREET SUITE 3300 WALTHAM, MA 02451		X

Signatures
/s/ John A. Genest as Attorney-in-Fact for Izhar Armony		11/25/2009
^** Signature of Reporting Person		Date
/s/ John A. Genest as Attorney-in-Fact for Christopher Baldwin		11/25/2009
^** Signature of Reporting Person		Date
/s/ John A. Genest as Attorney-in-Fact for Richard M. Burnes, Jr.		11/25/2009
^** Signature of Reporting Person		Date
/s/ John A. Genest as Attorney-in-Fact for Ted R. Dintersmith		11/25/2009
^** Signature of Reporting Person		Date
/s/ John A. Genest as Attorney-in-Fact for Bruce I. Sachs		11/25/2009
^** Signature of Reporting Person		Date
/s/ John A. Genest as Attorney-in-Fact for William P. Tai		11/25/2009
^** Signature of Reporting Person		Date
/s/ John A. Genest as Attorney-in-Fact for Michael J. Zak		11/25/2009
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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