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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1080709	Arena Pharmaceuticals Inc	ARNA	Pharmaceutical Preparations (2834)	232908305

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1170362	W Steven Spector	C/O Arena Pharmaceuticals, Inc. 6154 Nancy Ridge Drive San Diego CA 92121	Evp, General Counsel & Sec	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2013-09-05	20,000	$1.49	91,046	No	4	M	Direct
Common Stock	Disposition	2013-09-05	20,000	$6.54	71,046	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2013-09-05	20,000	$0.00	20,000	$1.49

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
235,000		2021-03-15	No	4	M	Direct

Footnotes

The amount includes shares purchased under Arena's employee stock purchase plan prior to the reported transaction.
The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $6.49 and $6.575 per share, 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 this footnote.
The options vest in four equal annual installments, and are exercisable once vested. The first and second installments became exercisable on March 15, 2012, and 2013, and the third and fourth installments vest on March 15, 2014, and 2015.