ARROWHEAD PHARMACEUTICALS, INC. — Director's Dealing 2010

Apr 15, 2010

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: ARROWHEAD RESEARCH CORP (ARWR)
CIK: 0000879407
Period of Report: 2009-11-16

Reporting Person: Myszkowski Kenneth Allen (CFO)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option	$0.70	2019-11-16	Common Stock (250000)		Direct
Stock Option	$0.52	2020-03-04	Common Stock (80000)		Direct

Footnotes

F1: Vesting of 125,000 shares begins on May 16, 2010, at which time 15,632 shares vest; the balance vests on the first of each month thereafter in equal monthly installments of 2,604 shares. Vesting of the remaining 125,000 shares begins on August 1, 2010, at which time 15,632 shares vest; the balance vests on the first of each month thereafter in equal monthly installments of 2,604 shares.

F2: Vesting in 24 equal monthly installments beginning on 4/01/10.