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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
879407	Arrowhead Research Corp	ARWR	Services-Commercial Physical & Biological Research (8731)	460408024

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1595838	L. David Lewis	Arrowhead Research Corporation 225 S. Lake Avenue, Suite 1050 Pasadena CA 91101	Chief Scientific Officer	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	2015-01-05	15,000	$2.01	15,000	No	4	M	Direct
Common Stock	Disposition	2015-01-05	15,000	$8.01	0	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	Stock Option (right to buy)	Disposition	2015-01-05	15,000	$0.00	15,000	$2.01

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
287,500	2013-06-01	2023-05-06	No	4	M	Direct

Footnotes

Represents the weighted average price at which shares were sold within a range between $8.00 and $8.03. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.
Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.
Represents first vesting date. Option vests over four years from date of grant.