X0306 4 2015-05-12 0 0001023313 FORRESTER RESEARCH, INC. FORR 0001346755 Teichgraeber Gretchen C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DRIVE CAMBRIDGE MA 02140 1 0 0 0 Common Stock 2015-05-13 4 M 0 844 0.00 A 4583 D Common Stock 2015-05-14 4 M 0 870 0.00 A 5453 D Restricted Stock Units 2015-05-13 4 M 0 844 D common stock 844 2530 D Restricted Stock Units 2015-05-14 4 M 0 870 D common stock 870 1738 D Restricted Stock Units 2015-05-12 4 A 0 3703 0.00 A common stock 3703 3703 D Represents the conversion, upon vesting, of restricted stock units into common stock. Each Restricted Stock Unit represents the right to receive, following vesting, one share of Forrester Research, Inc. common stock. On May 13, 2014, the reporting person was granted 3374 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. On May 14, 2013, the reporting person was granted 3478 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. Unless earlier forfeited under the terms of the RSU, the award vests and converts into common stock in four equal and consecutive installments beginning on the first anniversary of the grant date. Maite Garcia, attorney-in-fact for Gretchen Teichgraeber 2015-05-15