FORM 4
[X] 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 *

GALLAHUE KIERAN		 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
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

6154 NANCY RIDGE DRIVE		 3. Date of Earliest Transaction (MM/DD/YYYY)

3/11/2022
(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)
Code V Amount (A) or (D) Price
Common Stock 3/11/2022  J(1)  3628 D (1)0 I By The Gallahue Irrevocable Trust 
Common Stock 3/11/2022  J(1)  1116 D (1)8167 D  
Common Stock 3/11/2022  J(2)  8167 D (2)0 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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy) $44.79 3/11/2022  D     2500   (3) (3)Common Stock 2500.0  (3)0 D  
Stock Option (right to buy) $44.79 3/11/2022  D     4583   (3) (3)Common Stock 4583.0  (3)0 D  
Stock Option (right to buy) $56.5 3/11/2022  D     5000   (3) (3)Common Stock 5000.0  (3)0 D  
Stock Option (right to buy) $61.31 3/11/2022  D     5000   (3) (3)Common Stock 5000.0  (3)0 D  
Stock Option (right to buy) $65.19 3/11/2022  D     7202   (3) (3)Common Stock 7202.0  (3)0 D  
Explanation of Responses:
(1) Reflects disposition of Issuer common stock with the consummation of the transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement"), dated December 12, 2021, by and among the Issuer, Pfizer Inc. ("Parent") and Antioch Merger Sub, Inc., a wholly owned subsidiary of Parent ("Merger Sub"), including the consummation of the merger (the "Merger") between Issuer and Merger Sub on March 11, 2022. Pursuant to the Merger Agreement, as of the effective time of the Merger (the "Effective Time"), each outstanding share of Issuer common stock, $0.0001 par value per share ("Issuer Common Stock"), was cancelled, retired and converted into the right to receive an amount equal to $100.00 in cash, without interest thereon (the "Merger Consideration"), subject to any required withholding of taxes.
(2) Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit subject to vesting conditions based solely on continued employment or service to the Issuer or any of its subsidiaries granted by the Issuer under an Issuer Stock Plan, except any restricted stock unit that was granted after December 12, 2021, (each, an "Issuer RSU"), that was unvested and outstanding as of immediately prior to the Effective Time was cancelled and immediately ceased to be outstanding and was converted into the right to receive an amount in cash equal to the Merger Consideration, subject to any required withholding of taxes.
(3) Pursuant to the Merger Agreement, at the Effective Time, each option to purchase Issuer Common Stock (each, an "Issuer Option") granted by Issuer under the Issuer's 2021 Long-Term Incentive Plan or prior stock plans (collectively, the "Issuer Stock Plans") that was outstanding as of immediately prior to the Effective Time, whether or not then vested, was cancelled and immediately ceased to be outstanding and was converted into the right to receive an amount in cash equal to the product of (1) the excess, if any, of the Merger Consideration over the per-share exercise price of such Issuer Option, multiplied by (2) the number of Issuer Common Stock then subject to such Issuer Option, subject to any required withholding of taxes.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
GALLAHUE KIERAN
6154 NANCY RIDGE DRIVE
SAN DIEGO, CA 92121		X
Signatures
/s/ Andrew J. Cronauer, as Attorney-in-Fact3/11/2022
**Signature of Reporting PersonDate
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).
Note:File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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