Sec Form 4 Filing - Elliott Jeffrey Thomas @ EXACT SCIENCES CORP - 2019-01-02

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 Elliott Jeffrey Thomas 2. Issuer Name and Ticker or Trading Symbol EXACT SCIENCES CORP [ EXAS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O EXACT SCIENCES CORP., 441 CHARMANY DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 01/02/2019 (Street) MADISON, WI53719 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 10/31/2018 A V 755 ( 1 ) A $ 13.26 33,211 D Common Stock 781 I Held in 401(K) Plan

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 Performance Share Units ( 2 ) ( 3 ) 01/02/2019 A 90,909 ( 4 ) ( 4 ) Common Stock 90,909 $ 0 90,909 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Elliott Jeffrey Thomas C/O EXACT SCIENCES CORP. 441 CHARMANY DRIVE MADISON, WI53719 Chief Financial Officer Signatures /s/ Jeffrey T. Elliott by Mark R. Busch, attorney-in-fact 01/04/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents shares of common stock purchased through Employee Stock Purchase Plan. ( 2 )Represents a PSU award granted on July 28, 2016 (the "PSU Award") which covered a three-year performance measurement period ending on December 31, 2018 (the "Performance Period") and was described in the Company's proxy statement filed with the Securities and Exchange Commission on April 28, 2017. ( 3 )Each Performance Share Unit represents a right to receive one share of common stock. ( 4 )The PSU Award was subject to certain performance-based vesting requirements tied to the growth in the Company's stock price through the end of the Performance Period as calculated by reference to the 20 trading day trailing average closing price of the Company's common stock (the "Stock Price") as of the last day of the Performance Period compared to such Stock Price as of the beginning of the Performance Period. The Stock Price as of the last day of the Performance Period was $67.25 representing a greater than 760% increase from the $8.85 Stock Price at the beginning of the Performance Period. At target, the PSU Award covered 60,606 PSUs. Because the Stock Price at the end of the Performance Period well exceeded the maximum target Stock Price, the reporting person earned the maximum number of PSUs to which he was entitled under the PSU Award. The PSUs are immediately vested and will settle into shares of Common Stock within 30 days from the date of issuance.

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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