X0303 4 2011-02-23 0 0001381325 BigBand Networks, Inc. BBND 0001392938 Horton Robert C/O BIGBAND NETWORKS, INC. 475 BROADWAY STREET REDWOOD CITY CA 94063 0 1 0 0 Sr. VP & General Counsel Common Stock 2011-02-23 4 M 0 5200 0.00 A 9760 D Common Stock 2011-02-23 4 M 0 2500 0.00 A 12260 D Common Stock 2011-02-23 4 M 0 677 0.00 A 12327 D Common Stock 2011-02-24 4 F 0 3830 2.5404 D 8497 D Restricted Stock Units 2011-02-11 4 M 0 5200 0.00 D Common Stock 5200 26001 D Restricted Stock Units 2011-02-13 4 M 0 2500 0.00 D Common Stock 2500 2500 D Restricted Stock Units 2011-02-18 4 M 0 677 0.00 D 2020-11-17 Common Stock 8125 7448 D Each restricted stock unit represents a contingent right to receive one share of BBND common stock. The restricted stock units vest in six (6) equal semi-annual installments beginning on February 11, 2011. Vested shares will be delivered to the reporting person on or about each such vesting date. The restricted stock units vest in four (4) equal annual installments beginning on February 13, 2009. Vested shares will be delivered to the reporting person on or about each such vesting date. The restricted stock units vest as to 1/12 of the shares each quarter from the date of grant. Vested shares will be delivered to the reporting person on or about each such vesting date. /s/ Robert Horton by Julia Dumperth, Attorney-in-Fact 2011-02-24