X0306 4/A 2020-11-01 2020-11-03 0 0001023313 FORRESTER RESEARCH, INC. FORR 0001756940 Johnson Carrie C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DRIVE CAMBRIDGE MA 02140 0 1 0 0 Chief Research Officer Common Stock 2020-11-01 4 M 0 763 0.00 A 5633 D Common Stock 2020-11-01 4 F 0 223 36.94 D 5410 D Restricted Stock Units 0.00 2020-11-01 4 M 0 763 0.00 D common stock 763 1526 D Represents the conversion, upon vesting, of restricted stock units into common stock. Represents shares withheld by the Issuer to satisfy tax withholding obligations upon the vesting on November 1, 2020 of the restricted stock units awarded to the reporting person on November 1, 2018. 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. Each Restricted Stock Unit represents the right to receive, following vesting, one share of Forrester Research, Inc. common stock. On November 1, 2018, the reporting person was granted 3052 Restricted Stock Unites that vest and convert into common stock in four equal and consecutive installments beginning on the first anniversary of the grant date. Each Restricted Stock Unit is the equivalent of one share of Forrester Research, Inc. common stock. This Form 4A is filed to correct the number of shares in Table I, Sec. 5. The amount of securities beneficially owned following the transaction reported in the first row was 5633 not 6,802. The amount of securities beneficially owned following the transaction reported in the second row was 5410 not 6,579. Maite Garcia, attorney-in-fact for Carrie Johnson 2020-11-05