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 OF SECURITIES 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 * LEFKOFF KYLE   2. Issuer Name and Ticker or Trading Symbol ARRAY BIOPHARMA INC [ARRY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O BOULDER VENTURES, 1941 PEARL STREET, SUITE 300 3. Date of Earliest Transaction (Month/Day/Year) 10/26/2017 (Street) BOULDER, CO 80302 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 10/27/2017   M(1)   5,000 A $ 10.47 17,720 D   Common Stock               45,000 I (2) See footnote

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Stock Option (Right to Buy)

$ 10.47

10/26/2017

A

25,000

10/26/2018

10/26/2027

Common Stock

25,000

$ 0

25,000

D

Restricted Stock Units

$ 0

10/26/2017

A

5,000

10/26/2018

(3)

Common Stock

5,000

$ 0

5,000

D

Restricted Stock Units

$ 0

10/27/2017

M

5,000

10/27/2017

(4)

Common Stock

5,000

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
LEFKOFF KYLE C/O BOULDER VENTURES 1941 PEARL STREET, SUITE 300 BOULDER, CO 80302

Signatures

Jason Haddock, attorney in fact for Reporting Person		10/27/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Shares issued upon settlement of Restricted Stock Units ("RSUs") granted by the Issuer on October 27, 2016 as a result of the vesting of all such RSUs.
(2)	Comprised of 30,000 shares of common stock in trust for the benefit of Mr. Lefkoff's minor children and 15,000 shares of common stock held by BV Partners III Profit Sharing account for the benefit of Mr. Lefkoff.
(3)	. RSUs awarded to the reporting person for no additional cash consideration and represent a contingent right to receive one share of Array BioPharma Inc. common stock. The units vest and will be settled in stock on October 26, 2018, subject to continued service on Array's board of directors.
(4)	RSUs awarded to the reporting person on October 27, 2016 for no additional cash consideration and represent a contingent right to receive one share of Array BioPharma Inc. common stock. The units vested and were settled in stock on October 27, 2017.

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