X0609 4 2026-04-29 0001023313 FORRESTER RESEARCH, INC. FORR 0002110303 Favre Christophe false C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DRIVE CAMBRIDGE MA 02140 false true false false Chief Sales Officer false Common Stock 2026-04-01 4 M false 3177 0 A 15270 D Common Stock 2026-04-01 4 F false 1532 5.39 D 13738 D Restricted Stock Units 0 2026-04-01 4 M false 987 0 D Common Stock 987 1972 D Restricted Stock Units 0 2026-04-01 4 M false 2190 0 D Common Stock 2190 6570 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 April 1, 2026 of the restricted stock units awarded to the reporting person on April 1, 2024 and April 1, 2025. The awards include a provision for the withholding of shares by the Issuer to satisfy withholding taxes due as a result of the vesting of the awards. Each Restricted Stock Unit represents the right to receive, following vesting, one share of Forrester Research, Inc. common stock. On April 1, 2024, the reporting person was granted 3,946 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. On April 1, 2025, the reporting person was granted 8,760 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. Maite Garcia, attorney-in-fact for Christophe Favre 2026-04-29