X0303 4 2010-10-04 0 0001159167 IROBOT CORP IRBT 0001342373 Greiner Helen C/O IROBOT CORPORATION 8 CROSBY DRIVE BEDFORD MA 01730 1 0 0 0 Common Stock 2010-10-04 4 S 0 5900 18.2179 D 1125060 D Common Stock 2010-10-05 4 S 0 7200 18.4497 D 1117860 D Common Stock 2010-10-06 4 S 0 3000 18.7434 D 1114860 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on October 27, 2008, as amended on May 21, 2010. The range of prices for the transaction reported on this line was $18.05 to $18.65. The average weighted price was $18.2179. The reporting person will provide, upon request by the SEC, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The range of prices for the transaction reported on this line was $17.86 to $18.71. The average weighted price was $18.4497. The reporting person will provide, upon request by the SEC, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The range of prices for the transaction reported on this line was $18.63 to $18.79. The average weighted price was $18.7434. The reporting person will provide, upon request by the SEC, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. /s/ Glen D. Weinstein, Attorney-in-Fact 2010-10-06