Sec Form 4 Filing - Audet Craig Michael @ ARENA PHARMACEUTICALS INC - 2013-05-21

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 Audet Craig Michael 2. Issuer Name and Ticker or Trading Symbol ARENA PHARMACEUTICALS INC [ ARNA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP, Opn & Head Glob Reg Afrs (Last) (First) (Middle) C/O ARENA PHARMACEUTICALS, INC., 6154 NANCY RIDGE DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 05/21/2013 (Street) SAN DIEGO, CA92121 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 05/21/2013 M 37,500 A $ 1.28 52,500 D Common Stock 05/21/2013 M 46,250 A $ 1.81 98,750 D Common Stock 05/21/2013 S 83,750 D $ 8 15,000 D

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 Employee Stock Option (right to buy) $ 1.28 05/21/2013 M 37,500 ( 1 ) 05/15/2021 Common Stock 37,500 $ 0 37,500 D Employee Stock Option (right to buy) $ 1.81 05/21/2013 M 46,250 ( 2 ) 03/19/2022 Common Stock 46,250 $ 0 138,750 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Audet Craig Michael C/O ARENA PHARMACEUTICALS, INC. 6154 NANCY RIDGE DRIVE SAN DIEGO, CA92121 SVP, Opn & Head Glob Reg Afrs Signatures Adam S. Chinnock, as Attorney-in-Fact 05/21/2013 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The options, representing a right to purchase a total of 75,000 shares, vest in four equal annual installments, and are exercisable once vested. The first and second installments became exercisable on May 15, 2012, and May 15, 2013, respectively, and the third and fourth installments vest on May 15, 2014, and May 15, 2015, respectively. ( 2 )The options, representing a right to purchase a total of 185,000 shares, vest in four equal annual installments, and are exercisable once vested. The first installment became exercisable on March 19, 2013, and the second, third and fourth installments vest on March 19, 2014, March 19, 2015, and March 19, 2016, respectively.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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