X0306 4 2017-09-12 0 0001159167 IROBOT CORP IRBT 0001394093 Dean Alison C/O IROBOT CORPORATION 8 CROSBY DRIVE BEDFORD MA 01730 0 1 0 0 EVP, CFO & Treasurer Common Stock 2017-09-12 4 M 0 529 34.67 A 82609 D Common Stock 2017-09-12 4 M 0 4463 43.35 A 87072 D Common Stock 2017-09-12 4 M 0 5688 35.43 A 92760 D Common Stock 2017-09-12 4 M 0 5345 34.30 A 98105 D Common Stock 2017-09-12 4 M 0 4838 32.38 A 102943 D Common Stock 2017-09-12 4 M 0 5208 33.14 A 108151 D Common Stock 2017-09-12 4 M 0 3735 37.62 A 111886 D Common Stock 2017-09-12 4 S 0 33809 100.00 D 78077 D Employee Stock Option (Right to buy) 34.67 2017-09-12 4 M 0 529 0.00 D 2020-06-07 Common Stock 529 0 D Employee Stock Option (Right to buy) 43.35 2017-09-12 4 M 0 4463 0.00 D 2014-03-07 2021-03-07 Common Stock 4463 637 D Employee Stock Option (Right to buy) 35.43 2017-09-12 4 M 0 5688 0.00 D 2014-06-06 2021-06-06 Common Stock 5688 812 D Employee Stock Option (Right to buy) 34.30 2017-09-12 4 M 0 5345 0.00 D 2015-03-06 2022-03-06 Common Stock 5345 3205 D Employee Stock Option (Right to buy) 32.38 2017-09-12 4 M 0 4838 0.00 D 2015-06-05 2022-06-05 Common Stock 4838 3762 D Employee Stock Option (Right to buy) 33.14 2017-09-12 4 M 0 5208 0.00 D 2016-03-11 2023-03-11 Common Stock 5208 8680 D Employee Stock Option (Right to buy) 37.62 2017-09-12 4 M 0 3735 0.00 D 2016-06-10 2023-06-10 Common Stock 3735 8215 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 7, 2017 and amended on September 14, 2017. This option is currently exercisable. This option vests over a four-year period, at a rate of twenty-five percent (25%) on the first anniversary of the date listed in the table, and quarterly thereafter. /s/ Glen D. Weinstein, Attorney-in-Fact 2017-09-14