Statement of Changes in Beneficial Ownership (4)

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
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Munshi Amit	2. Issuer Name and Ticker or Trading Symbol ARENA PHARMACEUTICALS INC [ ARNA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO
(Last) (First) (Middle) C/O ARENA PHARMACEUTICALS, INC., 6154 NANCY RIDGE DRIVE	3. Date of Earliest Transaction (MM/DD/YYYY) 5/21/2020
(Street) SAN DIEGO, CA 92121 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	5/21/2020		M⁽¹⁾		50000	A	$14.60	57750	D
Common Stock	5/21/2020		S⁽¹⁾		50000	D	$55.00	7750	D
Common Stock	5/22/2020		M⁽¹⁾		34800	A	$14.60	42550	D
Common Stock	5/22/2020		S⁽¹⁾		5390	D	$56.6731 ⁽²⁾	37160	D
Common Stock	5/22/2020		S⁽¹⁾		9017	D	$57.5205 ⁽³⁾	28143	D
Common Stock	5/22/2020		S⁽¹⁾		13931	D	$58.6075 ⁽⁴⁾	14212	D
Common Stock	5/22/2020		S⁽¹⁾		6462	D	$59.1174 ⁽⁵⁾	7750	D

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Employee Stock Option (right to buy)	$14.60	5/21/2020		M ⁽¹⁾			50000	⁽⁶⁾	2/13/2024	Common Stock	50000	$0.00	149800	D
Employee Stock Option (right to buy)	$14.60	5/22/2020		M ⁽¹⁾			34800	⁽⁶⁾	2/13/2024	Common Stock	34800	$0.00	115000	D

Explanation of Responses:
(1)	The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan established by the reporting person.
(2)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $56.19 to $56.99, inclusive. The reporting person undertakes to provide Arena Pharmaceuticals, Inc., any security holder of Arena Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes 2, 3, 4, and 5 to this Form 4.
(3)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $57.07 to $57.97, inclusive.
(4)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.00 to $58.97, inclusive.
(5)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.00 to $59.22, inclusive.
(6)	The options vest over four years, with 25% of the shares subject to the option vesting on February 13, 2018, and the remainder of the shares vesting monthly over the following three years in equal installments (except as otherwise necessary to avoid vesting of a fractional share), and are exercisable once vested.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Munshi Amit C/O ARENA PHARMACEUTICALS, INC. 6154 NANCY RIDGE DRIVE SAN DIEGO, CA 92121	X		President and CEO