X0306 4 2017-08-03 0 0001023313 FORRESTER RESEARCH, INC. FORR 0001585764 Condon Cliff C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DRIVE CAMBRIDGE MA 02140 0 1 0 0 Chief Research Officer Common Stock 2017-08-03 4 M 0 1875 0.00 A 17787 D Common Stock 2017-08-03 4 F 0 772 40.70 D 17015 D Restricted Stock Units 0.00 2017-08-03 4 M 0 1875 0.00 D common stock 1875 3750 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 August 3, 2017 of the restricted stock units awarded to the reporting person on August 3, 2015. 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 August 3, 2015, the reporting person was granted 7500 Restricted Stock Units 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. Maite Garcia, attorney-in-fact for Cliff Condon 2017-08-07