X0306 4 2017-02-24 0001145197 INSULET CORP PODD 0001631895 Petrovic Shacey C/O INSULET CORPORATION 600 TECHNOLOGY PARK DRIVE, SUITE 200 BILLERICA MA 01821 1 President and COO Common Stock 2017-02-24 4 F 0 2732 45.96 D 83993 D This transaction represents the withholding of shares received upon the vesting of restricted stock units to cover the associated tax obligations. Includes 13,522 restricted stock units granted on February 22, 2017, which vest one-third of the total units on February 22, 2018, one-third of the total units on February 22, 2019, and one-third of the total units on February 22, 2020; 18,989 restricted stock units granted on February 9, 2015, which vest on February 9, 2018; 4,542 performance share units granted on April 1, 2015, which vest one-half of the total performance share units on April 1, 2017 and one-half of the total performance share units on April 1, 2018; and 14,240 restricted stock units granted on February 24, 2016, which vest one-half of the total units on February 24, 2018 and one-half of the total units on February 24, 2019, subject to continued employment. Vested shares will be delivered to the reporting person as soon as practicable following a vesting date. Includes an aggregate of 1,386 shares acquired under the Insulet Corporation 2007 Employee Stock Purchase Plan on the following dates: 712 shares on December 31, 2015 and 674 shares on June 30, 2016. /s/ David Colleran, attorney-in-fact 2017-02-28