X0306 4 2021-06-01 0 0001023313 FORRESTER RESEARCH, INC. FORR 0001206313 BRADFORD NEIL C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DR. CAMBRIDGE MA 02140 1 0 0 0 Common Stock 2021-06-01 4 F 0 82 43.28 D 11564 D Common Stock 2021-06-01 4 A 0 2772 0.00 A 14336 D Represents shares withheld by the Issuer to satisfy tax withholding obligations upon the vesting on June 1, 2021 of the restricted stock units awarded to the reporting person on March 1, 2020. The award includes a provision for the withholding of shares by the Issuer to satisfy withholding taxes due as a result of the vesting of the award The securities awarded on June 1, 2021 are in the form of Restricted Stock Units issued pursuant to the Forrester Research, Inc. Amended and Restated Equity Incentive Plan that entitle the reporting person, upon vesting, to receive one share of common stock per Restricted Stock Unit. The Restricted Stock Units will vest and convert into common stock in four equal and consecutive installments. The first tranche will vest on September 1, 2021, with an equal number of shares vesting on each of December 1, 2021 and March 1, 2022, and the balance of the shares vesting on June 1, 2022. Maite Garcia, attorney-in-fact for Neil Bradford 2021-06-02