Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Squarer Ron
  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)
CEO
(Last)
(First)
(Middle)
C/O ARRAY BIOPHARMA INC., 3200 WALNUT STREET
3. Date of Earliest Transaction (Month/Day/Year)
04/01/2018
(Street)

BOULDER, CO 80301
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 04/01/2018   M   18,906 (1) A $ 0 228,180 (2) D  
Common Stock 04/01/2018   F   16,605 (3) D $ 16.32 211,575 D  

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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
Restricted Stock Units $ 0 04/01/2018   M     18,906   (4) 04/01/2020 Common Stock 18,906 $ 0 37,813 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Squarer Ron
C/O ARRAY BIOPHARMA INC.
3200 WALNUT STREET
BOULDER, CO 80301
      CEO  

Signatures

 Jason Haddock, attorney-in-fact for Ron Squarer   04/03/2018
**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 April 1, 2016 as a result of the vesting of one fourth of such RSUs.
(2) Includes (i) 18,906 unvested Restricted Stock Units ("RSUs") awarded on April 1, 2015 to the reporting person for no additional cash consideration, each of which represent a contingent right to receive one share of Array BioPharma Inc. common stock and which were reported by the reporting person on Table I on a form 4 filed upon grant of the RSUs, and (ii) 18,906 shares of common stock issued upon the vesting of these RSU's on April 1, 2018.
(3) Represents shares withheld to satisfy tax withholding obligations of the reporting person.
(4) The remaining RSUs vest and will be settled in stock in two equal annual installments on April 1, 2019 and 2020.

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