FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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 *   Bielasz Jennifer Kathleen 2. Date of Event Requiring Statement (Month/Day/Year) 07/10/2015 3. Issuer Name and Ticker or Trading Symbol ARENA PHARMACEUTICALS INC [ARNA] (Last) (First) (Middle) C/O ARENA PHARMACEUTICALS, INC., 6154 NANCY RIDGE DRIVE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP, Accounting & Controller 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) SAN DIEGO, CA 92121 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 4,256 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (right to buy)	  (1)	01/20/2016	Common Stock	3,000	$ 16.8	D	Â
Employee Stock Option (right to buy)	  (2)	07/28/2016	Common Stock	4,000	$ 10.52	D	Â
Employee Stock Option (right to buy)	  (3)	02/26/2017	Common Stock	6,500	$ 13.5	D	Â
Employee Stock Option (right to buy)	  (4)	03/17/2019	Common Stock	3,000	$ 4.01	D	Â
Employee Stock Option (right to buy)	  (5)	03/17/2020	Common Stock	4,500	$ 3.25	D	Â
Employee Stock Option (right to buy)	  (6)	03/19/2022	Common Stock	10,000	$ 1.81	D	Â
Employee Stock Option (right to buy)	  (7)	03/05/2020	Common Stock	24,000	$ 8.54	D	Â
Employee Stock Option (right to buy)	  (8)	03/03/2021	Common Stock	40,000	$ 6.8	D	Â
Employee Stock Option (right to buy)	  (9)	03/11/2022	Common Stock	60,000	$ 4.47	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Bielasz Jennifer Kathleen C/O ARENA PHARMACEUTICALS, INC. 6154 NANCY RIDGE DRIVE SAN DIEGO, CA 92121	Â	Â	  VP, Accounting & Controller	Â

Signatures

Adam S. Chinnock, as Attorney-in-Fact		07/13/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	The options vested and became exercisable in four equal annual installments beginning on January 20, 2007.
(2)	The options vested and became exercisable in four equal annual installments beginning on July 28, 2007.
(3)	The options vested and became exercisable in four equal annual installments beginning on February 26, 2008.
(4)	The options originally for a total of 6,000 shares vested and became exercisable in four equal annual installments beginning on March 17, 2010.
(5)	The options originally for a total of 9,000 shares vested and became exercisable in four equal annual installments beginning on March 17, 2011.
(6)	The options originally for a total of 40,000 shares vest in four equal annual installments, and are exercisable once vested. The first installment became exercisable on March 19, 2013, the second installment became exercisable on March 19, 2014, the third installment became exercisable on March 19, 2015, and the fourth installment vests on March 19, 2016.
(7)	The options vest in four equal annual installments, and are exercisable once vested. The first installment became exercisable on March 5, 2014, the second installment became exercisable on March 5, 2015, the third installment vests on March 5, 2016, and the fourth installment vests on March 5, 2017.
(8)	The options vest in four equal annual installments, and are exercisable once vested. The first installment became exercisable on March 3, 2015, the second installment vests on March 3, 2016, the third installment vests on March 3, 2017, and the fourth installment vests on March 3, 2018.
(9)	The options vest in four equal annual installments beginning on March 11, 2016, and are exercisable once vested.

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