Sec Form 4 Filing - Thomas Bradley A @ INSULET CORP - 2017-05-11

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Thomas Bradley A 2. Issuer Name and Ticker or Trading Symbol INSULET CORP [ PODD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP Human Resources (Last) (First) (Middle) C/O INSULET CORPORATION, 600 TECHNOLOGY PARK DRIVE, SUITE 200 3. Date of Earliest Transaction (MM/DD/YY) 05/11/2017 (Street) BILLERICA, MA01821 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/11/2017 P 3,000 A $ 38.6923 ( 1 ) 63,778 ( 2 ) ( 3 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Thomas Bradley A C/O INSULET CORPORATION 600 TECHNOLOGY PARK DRIVE, SUITE 200 BILLERICA, MA01821 EVP Human Resources Signatures /s/ David Colleran, attorney-in-fact 05/12/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The price reported represents the weighted average purchase price of the shares purchased. The shares were purchased at varying prices in the range of $38.5000 to $38.7307. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares purchased at each separate price. ( 2 )Includes 6,061 restricted stock units granted on December 1, 2014, which vest on December 1, 2017; 4,102 restricted stock units granted on March 2, 2015, which vest on March 2, 2018; 2,271 performance share units granted on April 1, 2015, which vest on April 1, 2018; 6,836 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; and 6,491 restricted stock units granted on February 22, 2017, which vest one-third of the total units on February 22, 2018, and one-third of the total units on February 22, 2019, and one-third of the total units on February 22, 2020 , subject to continued employment. Vested shares will be delivered to the reporting person as soon as practicable following a vesting date. ( 3 )Includes an aggregate of 1,264 shares purchased under the Insulet Corporation 2007 Employee Stock Purchase Plan on the following dates: 569 shares acquired on December 31, 2015; 568 shares acquired on June 30, 2016; and 127 shares acquired on November 30, 2016.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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