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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
1514346	Kathleen Jennifer Bielasz	C/O Arena Pharmaceuticals, Inc. 6166 Nancy Ridge Drive San Diego CA 92121	Sr.dir. Of Acct. & Cont. (Pao)	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
Common Stock	Acquisiton	2012-03-29	6,250	$1.49	15,600	No	4	M	Direct
Common Stock	Disposition	2012-03-29	6,250	$3.04	9,350	No	4	S	Direct
Common Stock	Disposition	2012-03-29	4,550	$3.01	4,800	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	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	2012-03-29	6,250	$0.00	6,250	$1.49

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
18,750		2021-03-15	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	30	Indirect	By son

Footnotes

The reporting person paid the issuer a total of $34.20 for the difference between the $1.90 per share price of the 30 shares her son purchased on February 1, 2012, and the $3.0401 per share price of 30 of the shares sold by the reporting person and reported on this line.
The options, representing the right to purchase a total of 25,000 shares, vest in four equal annual installments beginning on March 15, 2012, which was the first anniversary of the date on which the options were granted. The options are exercisable once vested.