X0306 4 2017-05-12 0 0001023313 FORRESTER RESEARCH, INC. FORR 0001530736 Peltzman Steven P. C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DRIVE CAMBRIDGE MA 02140 0 1 0 0 CBTO Common Stock 2017-05-12 4 M 0 10000 31.89 A 12418 D Common Stock 2017-05-12 4 M 0 2440 33.81 A 14858 D Common Stock 2017-05-12 4 S 0 12440 40.01 D 2418 D Common Stock 2017-05-15 4 M 0 4060 33.81 A 6478 D Common Stock 2017-05-15 4 M 0 3125 33.16 A 9603 D Common Stock 2017-05-15 4 S 0 6155 40.05 D 3448 D Non Qualified Stock Option (Right to Buy) 31.89 2017-05-12 4 M 0 10000 0.00 D 2021-10-02 common stock 10000 0 D Non Qualified Stock Option (Right to Buy) 33.81 2017-05-12 4 M 0 2440 0.00 D 2022-05-14 common stock 2440 4060 D Non Qualified Stock Option (Right to Buy) 33.81 2017-05-15 4 M 0 4060 0.00 D 2022-05-14 common stock 4060 0 D Non Qualified Stock Option (Right to Buy) 33.16 2017-05-15 4 M 0 3125 0.00 D 2025-08-02 common stock 3125 9375 D The Options become exercisable in four equal installments on the first, second, third, and fourth anniversaries of the grant date. Maite Garcia, attorney-in-fact for Steven P. Peltzman 2017-05-16