Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Myszkowski Kenneth Allen
 2. Date of Event Requiring Statement (Month/Day/Year)
11/16/2009		 3. Issuer Name and Ticker or Trading Symbol
ARROWHEAD RESEARCH CORP [ARWR]
(Last)
(First)
(Middle)
ARROWHEAD RESEARCH CORPORATION, 201 S. LAKE AVE., SUITE 703		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CFO
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PASADENA, CA 91101		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option 05/16/2010(1) 11/16/2019 Common Stock 250,000 $ 0.7 D  
Stock Option 04/01/2010(2) 03/04/2020 Common Stock 80,000 $ 0.52 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Myszkowski Kenneth Allen
ARROWHEAD RESEARCH CORPORATION
201 S. LAKE AVE., SUITE 703
PASADENA, CA 91101		       CFO  

Signatures

Kenneth Allen Myszkowski 04/12/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) 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.
(2) Vesting in 24 equal monthly installments beginning on 4/01/10.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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