Registration Rights Agreement, dated as of October 20, 2011



 EXHIBIT 10.2 

REGISTRATION RIGHTS AGREEMENT 
 REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of October 20, 2011, by and between ARROWHEAD RESEARCH CORPORATION, a Delaware corporation, (the
“Company”), and LINCOLN PARK CAPITAL FUND, LLC, an Illinois limited liability company (together with its permitted assigns, the “Buyer”). Capitalized terms used herein and not otherwise defined herein shall
have the respective meanings set forth in the Purchase Agreement by and between the parties hereto, dated as of the date hereof (as amended, restated, supplemented or otherwise modified from time to time, the “Purchase Agreement”).

 WHEREAS: 
 The Company has agreed, upon the terms and subject to the conditions of the Purchase Agreement, to issue to the Buyer up to Fifteen Million Dollars ($15,000,000) of Purchase Shares, subject in all cases
to the Maximum Share Cap, and to induce the Buyer to enter into the Purchase Agreement, the Company has agreed to provide certain registration rights under the Securities Act of 1933, as amended, and the rules and regulations thereunder, or any
similar successor statute (collectively, the “Securities Act”), and applicable state securities laws. 

NOW, THEREFORE, in consideration of the promises and the mutual covenants contained herein and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and the Buyer hereby agree as follows: 
  

	 	1.	DEFINITIONS. 

 As used in
this Agreement, the following terms shall have the following meanings: 
 a. “Investor” means the Buyer, any
transferee or assignee thereof to whom a Buyer assigns its rights under this Agreement and who agrees to become bound by the provisions of this Agreement in accordance with Section 9 and any transferee or assignee thereof to whom a transferee
or assignee assigns its rights under this Agreement and who agrees to become bound by the provisions of this Agreement in accordance with Section 9. 
 b. “Person” means any person or entity including but not limited to any corporation, a limited liability company, an association, a partnership, an organization, a business, an
individual, a governmental or political subdivision thereof or a governmental agency. 
 c. “Register,”
“registered,” and “registration” refer to a registration effected by preparing and filing one or more registration statements of the Company in compliance with the Securities Act and pursuant to Rule 415 under the
Securities Act or any successor rule providing for offering securities on a continuous basis (“Rule 415”), and the declaration or ordering of effectiveness of such registration statement(s) by the United States Securities and
Exchange Commission (the “SEC”). 
 d. “Registrable Securities” means the Purchase Shares
which have been, or which may from time to time be, issued or issuable to the Investor upon purchases of the Available Amount under the Purchase Agreement (without regard to any limitation or restriction on purchases) and the Commitment Shares
issued or issuable to the Investor and any shares of capital stock issued or issuable with respect to the Purchase Shares and the Commitment Shares or the Purchase Agreement as a result of any stock split, stock dividend, recapitalization, exchange
or similar event or otherwise, without regard to any limitation on purchases under the Purchase Agreement. 







 e. “Registration Statement” means the registration statement of the Company
covering only the sale of the Registrable Securities. 
  

	 	2.	REGISTRATION. 

 a.
Mandatory Registration. The Company shall within thirty (30) Business Days from the date hereof file with the SEC the Registration Statement. The Registration Statement shall register only the Registrable Securities and no other
securities of the Company. The Investor and its counsel shall have a reasonable opportunity to review and comment upon such registration statement or amendment to such registration statement and any related prospectus prior to its filing with the
SEC. Investor shall furnish all information reasonably requested by the Company for inclusion therein. The Company shall use its reasonable best efforts to have the Registration Statement or amendment declared effective by the SEC at the earliest
possible date after filing. The Company shall use reasonable best efforts to keep the Registration Statement effective pursuant to Rule 415 promulgated under the Securities Act and available for sales of all of the Registrable Securities at all
times until the earlier of (i) the date as of which the Investor may sell all of the Registrable Securities without restriction pursuant to the last sentence of Rule 144(b)(1)(i) promulgated under the Securities Act (or successor thereto) or
(ii) the date on which the Investor shall have sold all the Registrable Securities and no Available Amount remains under the Purchase Agreement (the “Registration Period”). The Registration Statement (including any amendments
or supplements thereto and prospectuses contained therein) shall not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein, or necessary to make the statements therein, in light of the
circumstances in which they were made, not misleading. 
 b. Rule 424 Prospectus. The Company shall, as required by
applicable securities regulations, from time to time file with the SEC, pursuant to Rule 424 promulgated under the Securities Act, the prospectus and prospectus supplements, if any, to be used in connection with sales of the Registrable Securities
under the Registration Statement. The Investor and its counsel shall have a reasonable opportunity to review and comment upon such prospectus prior to its filing with the SEC. The Investor shall use its reasonable best efforts to comment upon such
prospectus within one (1) Business Day from the date the Investor receives the final version of such prospectus. 
 c.
Sufficient Number of Shares Registered. In the event the number of shares available under the Registration Statement is insufficient to cover all of the Registrable Securities, the Company shall amend the Registration Statement or file a new
registration statement (a “New Registration Statement”), so as to cover all of such Registrable Securities as soon as practicable, but in any event not later than ten (10) Business Days after the necessity therefor arises,
subject to any limits on registration that the Staff of the SEC may impose pursuant to Rule 415 under the Securities Act. The Company shall use it reasonable best efforts to cause such amendment and/or New Registration Statement to become effective
as soon as practicable following the filing thereof. 
  

	 	3.	RELATED OBLIGATIONS. 


With respect to the Registration Statement and whenever any Registrable Securities are to be registered pursuant to Section 2(b)
including on any New Registration Statement, the Company shall use its reasonable best efforts to effect the registration of the Registrable Securities in accordance with the intended method of disposition thereof and, pursuant thereto, the Company
shall have the following obligations: 
 a. The Company shall prepare and file with the SEC such amendments (including
post-effective amendments) and supplements to any registration statement and the prospectus used in connection with such registration statement, which prospectus is to be filed pursuant to Rule 424


  
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promulgated under the Securities Act, as may be necessary to keep the Registration Statement or any New Registration Statement effective at all times during the Registration Period, and, during
such period, comply with the provisions of the Securities Act with respect to the disposition of all Registrable Securities of the Company covered by the Registration Statement or any New Registration Statement until such time as all of such
Registrable Securities shall have been disposed of in accordance with the intended methods of disposition by the seller or sellers thereof as set forth in such registration statement. 

b. The Company shall permit the Investor to review and comment upon the Registration Statement or any New Registration Statement and all
amendments and supplements thereto at least two (2) Business Days prior to their filing with the SEC, and not file any document in a form to which Investor reasonably objects. The Investor shall use its reasonable best efforts to comment upon
the Registration Statement or any New Registration Statement and any amendments or supplements thereto within two (2) Business Days from the date the Investor receives the final version thereof. The Company shall, at the request of the
Investor, furnish to the Investor, without charge any correspondence from the SEC or the Staff of the SEC to the Company or its representatives relating to the Registration Statement or any New Registration Statement. 

c. Upon request of the Investor, the Company shall furnish to the Investor, (i) promptly after the same is prepared and filed with
the SEC, at least one copy of such registration statement and any amendment(s) thereto, including financial statements and schedules, all documents incorporated therein by reference and all exhibits, (ii) upon the effectiveness of any
registration statement, a copy of the prospectus included in such registration statement and all amendments and supplements thereto (or such other number of copies as the Investor may reasonably request) and (iii) such other documents,
including copies of any preliminary or final prospectus, as the Investor may reasonably request from time to time in order to facilitate the disposition of the Registrable Securities owned by the Investor. For the avoidance of doubt, any filing
available to the Investor via the SEC’s live EDGAR system shall be deemed “furnished to the Investor” hereunder. 

d. The Company shall use reasonable best efforts to (i) register and qualify the Registrable Securities covered by a registration
statement under such other securities or “blue sky” laws of such jurisdictions in the United States as the Investor reasonably requests, (ii) prepare and file in those jurisdictions, such amendments (including post-effective
amendments) and supplements to such registrations and qualifications as may be necessary to maintain the effectiveness thereof during the Registration Period, (iii) take such other actions as may be necessary to maintain such registrations and
qualifications in effect at all times during the Registration Period, and (iv) take all other actions reasonably necessary or advisable to qualify the Registrable Securities for sale in such jurisdictions; provided, however, that the Company
shall not be required in connection therewith or as a condition thereto to (x) qualify to do business in any jurisdiction where it would not otherwise be required to qualify but for this Section 3(d), (y) subject itself to general
taxation in any such jurisdiction, or (z) file a general consent to service of process in any such jurisdiction. The Company shall promptly notify the Investor who holds Registrable Securities of the receipt by the Company of any notification
with respect to the suspension of the registration or qualification of any of the Registrable Securities for sale under the securities or “blue sky” laws of any jurisdiction in the United States or its receipt of actual notice of the
initiation or threatening of any proceeding for such purpose. 
 e. As promptly as practicable after becoming aware of such
event or facts, the Company shall notify the Investor in writing of the happening of any event or existence of such facts as a result of which the prospectus included in any registration statement, as then in effect, includes an untrue statement of
a material fact or omits to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, and promptly prepare a supplement or amendment to
such registration statement to correct such untrue 

  
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statement or omission, and deliver a copy of such supplement or amendment to the Investor (or such other number of copies as the Investor may reasonably request). The Company shall also promptly
notify the Investor in writing (i) when a prospectus or any prospectus supplement or post-effective amendment has been filed, and when a registration statement or any post-effective amendment has become effective (notification of such
effectiveness shall be delivered to the Investor by facsimile on the same day of such effectiveness and by overnight mail), (ii) of any request by the SEC for amendments or supplements to any registration statement or related prospectus or
related information, and (iii) of the Company’s reasonable determination that a post-effective amendment to a registration statement would be appropriate. 
 f. The Company shall use its reasonable best efforts to prevent the issuance of any stop order or other suspension of effectiveness of any registration statement, or the suspension of the qualification of
any Registrable Securities for sale in any jurisdiction and, if such an order or suspension is issued, to obtain the withdrawal of such order or suspension at the earliest possible moment and to notify the Investor of the issuance of such order and
the resolution thereof or its receipt of actual notice of the initiation or threat of any proceeding for such purpose. 
 g. The
Company shall (i) cause all the Registrable Securities to be listed on each securities exchange on which securities of the same class or series issued by the Company are then listed, if any, if the listing of such Registrable Securities is then
permitted under the rules of such exchange, or (ii) secure designation and quotation of all the Registrable Securities on the Principal Market. The Company shall pay all fees and expenses in connection with satisfying its obligation under this
Section. 
 h. The Company shall cooperate with the Investor to facilitate the timely preparation and delivery of certificates
(not bearing any restrictive legend as contemplated in Section 6 of the Purchase Agreement) representing the Registrable Securities to be offered pursuant to any registration statement and enable such certificates to be in such denominations or
amounts as the Investor may reasonably request and registered in such names as the Investor may request. 
 i. The Company shall
at all times provide a transfer agent and registrar with respect to its Common Stock. 
 j. If reasonably requested by the
Investor, the Company shall (i) promptly incorporate in a prospectus supplement or post-effective amendment such information as the Investor believes should be included therein relating to the sale and distribution of Registrable Securities,
including, without limitation, information with respect to the number of Registrable Securities being sold, the purchase price being paid therefor and any other terms of the offering of the Registrable Securities; (ii) make all required filings
of such prospectus supplement or post-effective amendment as soon as notified of the matters to be incorporated in such prospectus supplement or post-effective amendment; and (iii) supplement or make amendments to any registration statement.

 k. The Company shall use its reasonable best efforts to cause the Registrable Securities covered by any registration
statement to be registered with or approved by such other governmental agencies or authorities as may be necessary to consummate the disposition of such Registrable Securities. 

l. Within one (1) Business Day after any registration statement which includes the Registrable Securities is ordered effective by
the SEC, the Company shall deliver, and shall cause legal counsel for the Company to deliver, to the transfer agent for such Registrable Securities (with copies to the Investor) confirmation that such registration statement has been declared
effective by the SEC in the form attached hereto as Exhibit A. Thereafter, if requested by the Buyer at any time, the Company shall 

  
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deliver to the Buyer a written confirmation whether or not the effectiveness of such registration statement has lapsed at any time for any reason (including, without limitation, the issuance of a
stop order) and whether or not the registration statement is current and available to the Buyer for sale of all of the Registrable Securities. 
 m. The Company shall take all other reasonable actions necessary to expedite and facilitate disposition by the Investor of Registrable Securities pursuant to any registration statement. 

 

	 	4.	OBLIGATIONS OF THE INVESTOR. 

 a. The Company shall notify the Investor in writing of the information the Company reasonably requires from the Investor in connection with any registration statement hereunder. The Investor shall furnish
to the Company such information regarding itself, the Registrable Securities held by it and the intended method of disposition of the Registrable Securities held by it as shall be reasonably required to effect the registration of such Registrable
Securities and shall execute such documents in connection with such registration as the Company may reasonably request. 
 b.
The Investor agrees to cooperate with the Company as reasonably requested by the Company in connection with the preparation and filing of any registration statement hereunder. 
 c. The Investor agrees that, upon receipt of any notice from the Company of the happening of any event or existence of facts of the kind described in Section 3(f) or the first sentence of 3(e), the
Investor will immediately discontinue disposition of Registrable Securities pursuant to any registration statement(s) covering such Registrable Securities until the Investor’s receipt of the copies of the supplemented or amended prospectus
contemplated by Section 3(f) or the first sentence of 3(e). Notwithstanding anything to the contrary, the Company shall cause its transfer agent to promptly deliver shares of Common Stock without any restrictive legend in accordance with the
terms of the Purchase Agreement in connection with any sale of Registrable Securities with respect to which an Investor has entered into a contract for sale prior to the Investor’s receipt of a notice from the Company of the happening of any
event of the kind described in Section 3(f) or the first sentence of Section 3(e) and for which the Investor has not yet settled. 
  

	 	5.	EXPENSES OF REGISTRATION. 


All reasonable expenses, other than sales or brokerage commissions, incurred by the Company in connection with registrations, filings or
qualifications pursuant to Sections 2 and 3, including, without limitation, all registration, listing and qualifications fees, printers and accounting fees, and fees and disbursements of counsel for the Company, if any, shall be paid by the Company.

  

	 	6.	INDEMNIFICATION. 

 a. To
the fullest extent permitted by law, the Company will, and hereby does, indemnify, hold harmless and defend the Investor, each Person, if any, who controls the Investor, the members, the directors, officers, partners, employees, agents,
representatives of the Investor and each Person, if any, who controls the Investor within the meaning of the Securities Act or the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (each, an “Indemnified
Person”), against any losses, claims, damages, liabilities, judgments, fines, penalties, charges, costs, attorneys’ fees, amounts paid in settlement or expenses, joint or several, (collectively, “Claims”) incurred in
investigating, preparing or defending any action, claim, suit, inquiry, proceeding, investigation or appeal taken from the foregoing by or before any court or governmental, administrative or other regulatory agency, body or the SEC, whether pending
or threatened, whether or not an indemnified party is or may be a party thereto 

  
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(“Indemnified Damages”), to which any of them may become subject insofar as such Claims (or actions or proceedings, whether commenced or threatened, in respect thereof) arise out
of or are based upon: (i) any untrue statement or alleged untrue statement of a material fact in the Registration Statement, any New Registration Statement or any post-effective amendment thereto or in any filing made in connection with the
qualification of the offering under the securities or other “blue sky” laws of any jurisdiction in which Registrable Securities are offered (“Blue Sky Filing”), or the omission or alleged omission to state a material fact
required to be stated therein or necessary to make the statements therein not misleading, (ii) any untrue statement or alleged untrue statement of a material fact contained in the final prospectus (as amended or supplemented, if the Company
files any amendment thereof or supplement thereto with the SEC) or the omission or alleged omission to state therein any material fact necessary to make the statements made therein, in light of the circumstances under which the statements therein
were made, not misleading, (iii) any violation or alleged violation by the Company of the Securities Act, the Exchange Act, any other law, including, without limitation, any state securities law, or any rule or regulation thereunder relating to
the offer or sale of the Registrable Securities pursuant to the Registration Statement or any New Registration Statement or (iv) any material violation by the Company of this Agreement (the matters in the foregoing clauses (i) through
(iv) being, collectively, “Violations”). The Company shall reimburse each Indemnified Person promptly as such expenses are incurred and are due and payable, for any reasonable legal fees or other reasonable expenses incurred by
them in connection with investigating or defending any such Claim. Notwithstanding anything to the contrary contained herein, the indemnification agreement contained in this Section 6(a): (i) shall not apply to a Claim by an Indemnified
Person arising out of or based upon a Violation which occurs in reliance upon and in conformity with information about the Investor furnished in writing to the Company by such Indemnified Person expressly for use in connection with the preparation
of the Registration Statement, any New Registration Statement or any such amendment thereof or supplement thereto, if such prospectus was timely made available by the Company pursuant to Section 3(c) or Section 3(e); (ii) with respect
to any superseded prospectus, shall not inure to the benefit of any such person from whom the person asserting any such Claim purchased the Registrable Securities that are the subject thereof (or to the benefit of any person controlling such person)
if the untrue statement or omission of material fact contained in the superseded prospectus was corrected in the revised prospectus, as then amended or supplemented, if such revised prospectus was timely made available by the Company pursuant to
Section 3(c) or Section 3(e), and the Indemnified Person was promptly advised in writing not to use the incorrect prospectus prior to the use giving rise to a violation and such Indemnified Person, notwithstanding such advice, used it;
(iii) shall not be available to the extent such Claim is based on a failure of the Investor to deliver or to cause to be delivered the prospectus made available by the Company, if such prospectus was timely made available by the Company
pursuant to Section 3(c) or Section 3(e); and (iv) shall not apply to amounts paid in settlement of any Claim if such settlement is effected without the prior written consent of the Company, which consent shall not be unreasonably
withheld. Such indemnity shall remain in full force and effect regardless of any investigation made by or on behalf of the Indemnified Person and shall survive the transfer of the Registrable Securities by the Investor pursuant to Section 9.

 b. In connection with the Registration Statement or any New Registration Statement, the Investor agrees to severally and not
jointly indemnify, hold harmless and defend, to the same extent and in the same manner as is set forth in Section 6(a), the Company, each of its directors, each of its officers who signs the Registration Statement or any New Registration
Statement, each Person, if any, who controls the Company within the meaning of the Securities Act or the Exchange Act (collectively and together with an Indemnified Person, an “Indemnified Party”), against any Claim or Indemnified
Damages to which any of them may become subject, under the Securities Act, the Exchange Act or otherwise, insofar as such Claim or Indemnified Damages arise out of or are based upon any Violation, in each case to the extent, and only to the extent,
that such Violation occurs in reliance upon and in conformity with written information about the Investor set forth on Exhibit B attached hereto and furnished to the Company by the Investor expressly for use in connection with such
registration 

  
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statement; and, subject to Section 6(d), the Investor will reimburse any legal or other expenses reasonably incurred by them in connection with investigating or defending any such Claim;
provided, however, that the indemnity agreement contained in this Section 6(b) and the agreement with respect to contribution contained in Section 7 shall not apply to amounts paid in settlement of any Claim if such settlement is effected
without the prior written consent of the Investor, which consent shall not be unreasonably withheld; provided, further, however, that the Investor shall be liable under this Section 6(b) for only that amount of a Claim or Indemnified Damages as
does not exceed the net proceeds to the Investor as a result of the sale of Registrable Securities pursuant to such registration statement. Such indemnity shall remain in full force and effect regardless of any investigation made by or on behalf of
such Indemnified Party and shall survive the transfer of the Registrable Securities by the Investor pursuant to Section 9. 

c. Promptly after receipt by an Indemnified Person or Indemnified Party under this Section 6 of notice of the commencement of any
action or proceeding (including any governmental action or proceeding) involving a Claim, such Indemnified Person or Indemnified Party shall, if a Claim in respect thereof is to be made against any indemnifying party under this Section 6,
deliver to the indemnifying party a written notice of the commencement thereof, and the indemnifying party shall have the right to participate in, and, to the extent the indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to assume control of the defense thereof with counsel mutually satisfactory to the indemnifying party and the Indemnified Person or the Indemnified Party, as the case may be; provided, however, that an Indemnified Person or
Indemnified Party shall have the right to retain its own counsel with the fees and expenses to be paid by the indemnifying party, if, in the reasonable opinion of counsel retained by the indemnifying party, the representation by such counsel of the
Indemnified Person or Indemnified Party and the indemnifying party would be inappropriate due to actual or potential differing interests between such Indemnified Person or Indemnified Party and any other party represented by such counsel in such
proceeding. The Indemnified Party or Indemnified Person shall cooperate fully with the indemnifying party in connection with any negotiation or defense of any such action or claim by the indemnifying party and shall furnish to the indemnifying party
all information reasonably available to the Indemnified Party or Indemnified Person which relates to such action or claim. The indemnifying party shall keep the Indemnified Party or Indemnified Person fully apprised at all times as to the status of
the defense or any settlement negotiations with respect thereto. No indemnifying party shall be liable for any settlement of any action, claim or proceeding effected without its written consent, provided, however, that the indemnifying party shall
not unreasonably withhold, delay or condition its consent. No indemnifying party shall, without the consent of the Indemnified Party or Indemnified Person, consent to entry of any judgment or enter into any settlement or other compromise which does
not include as an unconditional term thereof the giving by the claimant or plaintiff to such Indemnified Party or Indemnified Person of a release from all liability in respect to such claim or litigation. Following indemnification as provided for
hereunder, the indemnifying party shall be subrogated to all rights of the Indemnified Party or Indemnified Person with respect to all third parties, firms or corporations relating to the matter for which indemnification has been made. The failure
to deliver written notice to the indemnifying party within a reasonable time of the commencement of any such action shall not relieve such indemnifying party of any liability to the Indemnified Person or Indemnified Party under this Section 6,
except to the extent that the indemnifying party is prejudiced in its ability to defend such action. 
 d. The indemnification
required by this Section 6 shall be made by periodic payments of the amount thereof during the course of the investigation or defense, as and when bills are received or Indemnified Damages are incurred, subject to the delivery of an undertaking
to reimburse such advanced amounts if it is ultimately determined that the Indemnified Party or Indemnified Person, as applicable, was not entitled to indemnification or contribution hereunder. 

  
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 e. The indemnity agreements contained herein shall be in addition to (i) any cause of
action or similar right of the Indemnified Party or Indemnified Person against the indemnifying party or others, and (ii) any liabilities the indemnifying party may be subject to pursuant to the law. 

 

	 	7.	CONTRIBUTION. 

 To the
extent any indemnification by an indemnifying party is prohibited or limited by law, the indemnifying party agrees to make the maximum contribution with respect to any amounts for which it would otherwise be liable under Section 6 to the
fullest extent permitted by law; provided, however, that: (i) no seller of Registrable Securities guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any
seller of Registrable Securities who was not guilty of fraudulent misrepresentation; and (ii) contribution by any seller of Registrable Securities shall be limited in amount to the net amount of proceeds received by such seller from the sale of
such Registrable Securities. 
  

	 	8.	REPORTS AND DISCLOSURE UNDER THE SECURITIES ACTS. 

 With a view to making available to the Investor the benefits of Rule 144 promulgated under the Securities Act or any other similar rule or regulation of the SEC that may at any time permit the Investor to
sell securities of the Company to the public without registration (“Rule 144”), the Company agrees, at the Company’s sole expense, to: 
 a. make and keep public information available, as those terms are understood and defined in Rule 144; 
 b. file with the SEC in a timely manner all reports and other documents required of the Company under the Securities Act and the Exchange Act so long as the Company remains subject to such requirements
and the filing of such reports and other documents is required for the applicable provisions of Rule 144; 
 c. furnish to the
Investor so long as the Investor owns Registrable Securities, promptly upon request, (i) a written statement by the Company that it has complied with the reporting and/or disclosure provisions of Rule 144, the Securities Act and the Exchange
Act, and (ii) such other information as may be reasonably requested to permit the Investor to sell such securities pursuant to Rule 144 without registration; and 
 d. take such additional action as is requested by the Investor to enable the Investor to sell the Registrable Securities pursuant to Rule 144, including, without limitation, delivering such appropriate
instructions to the Company’s Transfer Agent as may be requested from time to time by the Investor and otherwise fully cooperate with Investor and Investor’s broker to effect such sale of securities pursuant to Rule 144. 

The Company agrees that damages may be an inadequate remedy for any breach of the terms and provisions of this Section 8 and that
Investor shall, whether or not it is pursuing any remedies at law, be entitled to seek equitable relief in the form of a preliminary or permanent injunctions, without having to post any bond or other security, upon any breach or threatened breach of
any such terms or provisions. 

  
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	 	9.	ASSIGNMENT OF REGISTRATION RIGHTS. 

 The Company shall not assign this Agreement or any rights or obligations hereunder without the prior written consent of the Investor. The Investor may not assign its rights under this Agreement without
the written consent of the Company, other than to an affiliate of the Investor controlled by Jonathan Cope or Josh Scheinfeld. 
  

	 	10.	AMENDMENT OF REGISTRATION RIGHTS. 

 Provisions of this Agreement may be amended and the observance thereof may be waived (either generally or in a particular instance and either retroactively or prospectively), only with the written consent
of the Company and the Investor. 
  

	 	11.	MISCELLANEOUS. 

 a. A
Person is deemed to be a holder of Registrable Securities whenever such Person owns or is deemed to own of record such Registrable Securities. If the Company receives conflicting instructions, notices or elections from two or more Persons with
respect to the same Registrable Securities, the Company shall act upon the basis of instructions, notice or election received from the registered owner of such Registrable Securities. 

b. Any notices, consents, waivers or other communications required or permitted to be given under the terms of this Agreement must be in
writing and will be deemed to have been delivered: (i) upon receipt, when delivered personally; (ii) upon receipt, when sent by facsimile (provided confirmation of transmission is mechanically or electronically generated and kept on file
by the sending party); or (iii) one (1) Business Day after deposit with a nationally recognized overnight delivery service, in each case properly addressed to the party to receive the same. The addresses and facsimile numbers for such
communications shall be: 
 If to the Company: 
 Arrowhead Research Corporation 
 225 S. Lake Avenue, Suite 300 

Pasadena, CA 91101 

	 	Telephone:	626-304-3400 

 Facsimile:

 Attention: 
 With a copy to: 
 Ropes & Gray LLP 

Three Embarcadero Center 
 San Francisco, CA 94111 

	 	Telephone:	415-315-6395 


	 	Facsimile:	415-315-6026 


	 	Attention:	Ryan A. Murr 


  
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 If to the Investor: 
 Lincoln Park Capital Fund, LLC 
 440 N. Wells, Suite 620 

Chicago, IL 60654 

	 	Telephone:	312-822-9300 


	 	Facsimile:	312-822-9301 


	 	Attention:	Josh Scheinfeld/Jonathan Cope 


With a copy to: 

Greenberg Traurig, LLP 
 The MetLife Building 
 200 Park Avenue 

New York, NY 10166 

	 	Telephone:	212-801-9200 


	 	Facsimile:	212-801-6400 


	 	Attention:	Anthony J. Marsico 

 or at such other address
and/or facsimile number and/or to the attention of such other person as the recipient party has specified by written notice given to each other party three (3) Business Days prior to the effectiveness of such change. Written confirmation of
receipt (A) given by the recipient of such notice, consent, waiver or other communication, (B) mechanically or electronically generated by the sender’s facsimile machine containing the time, date, recipient facsimile number and an
image of the first page of such transmission or (C) provided by a nationally recognized overnight delivery service, shall be rebuttable evidence of personal service, receipt by facsimile or receipt from a nationally recognized overnight
delivery service in accordance with clause (i), (ii) or (iii) above, respectively. 
 c. Failure of any party to
exercise any right or remedy under this Agreement or otherwise, or delay by a party in exercising such right or remedy, shall not operate as a waiver thereof. 
 d. The corporate laws of the State of Delaware shall govern all issues concerning the relative rights of the Company and its stockholders. All other questions concerning the construction, validity,
enforcement and interpretation of this Agreement shall be governed by the internal laws of the State of Illinois, without giving effect to any choice of law or conflict of law provision or rule (whether of the State of Illinois or any other
jurisdictions) that would cause the application of the laws of any jurisdictions other than the State of Illinois. Each party hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting the City of Chicago, for
the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not
personally subject to the jurisdiction of any such court, that such suit, action or proceeding is brought in an inconvenient forum or that the venue of such suit, action or proceeding is improper. Each party hereby irrevocably waives personal
service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof to such party at the address for such notices to it under this Agreement and agrees that such service shall constitute good and
sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. If any provision of this Agreement shall be invalid or unenforceable in any
jurisdiction, such invalidity or unenforceability shall not affect the validity or enforceability of the remainder of this Agreement in that jurisdiction or the validity or enforceability of any provision of this Agreement in any other jurisdiction.
EACH PARTY HEREBY IRREVOCABLY WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION 

  
 10 









 
HEREWITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY. 
 e. This Agreement and the Purchase Agreement constitute the entire agreement among the parties hereto with respect to the subject matter hereof and thereof. There are no restrictions, promises, warranties
or undertakings, other than those set forth or referred to herein and therein. This Agreement and the Purchase Agreement supersede all prior agreements and understandings among the parties hereto with respect to the subject matter hereof and
thereof. 
 f. Subject to the requirements of Section 9, this Agreement shall inure to the benefit of and be binding upon
the successors and permitted assigns of each of the parties hereto. 
 g. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof. 
 h. This Agreement may be executed in identical
counterparts, each of which shall be deemed an original but all of which shall constitute one and the same agreement. This Agreement, once executed by a party, may be delivered to the other party hereto by facsimile transmission or by e-mail in a
“.pdf” format data file of a copy of this Agreement bearing the signature of the party so delivering this Agreement. 

i. Each party shall do and perform, or cause to be done and performed, all such further acts and things, and shall execute and deliver
all such other agreements, certificates, instruments and documents, as the other party may reasonably request in order to carry out the intent and accomplish the purposes of this Agreement and the consummation of the transactions contemplated
hereby. 
 j. The language used in this Agreement will be deemed to be the language chosen by the parties to express their
mutual intent and no rules of strict construction will be applied against any party. 
 k. This Agreement is intended for the
benefit of the parties hereto and their respective successors and permitted assigns, and is not for the benefit of, nor may any provision hereof be enforced by, any other Person. 

* * * * * * 

  
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 IN WITNESS WHEREOF, the parties have caused this Registration Rights Agreement to be
duly executed as of day and year first above written. 
  

			
	THE COMPANY:
	
	ARROWHEAD RESEARCH CORPORATION



			
		
	By:	 	  




			
	Name:	 	
	Title:	 	
		
	BUYER:	 	



			
	
	LINCOLN PARK CAPITAL FUND, LLC
	BY: LINCOLN PARK CAPITAL, LLC
	BY: ROCKLEDGE CAPITAL CORPORATION



			
		
	By:	 	  




			
	Name:	 	Josh Scheinfeld



			
	Title:	 	President



  
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 EXHIBIT A 

TO REGISTRATION RIGHTS AGREEMENT 
 FORM OF NOTICE OF EFFECTIVENESS 
 OF REGISTRATION STATEMENT

 [Date] 
  

			
	 [TRANSFER AGENT]
	  	
		
	 	  	
		
	 	  	


					
			
	 Re:
	 	
[                        
]
	  	

 Ladies and Gentlemen: 
 We are counsel to ARROWHEAD RESEARCH CORPORATION, a Delaware corporation (the “Company”), and have represented the Company in connection with that certain Purchase Agreement, dated
as of October 20, 2011 (the “Purchase Agreement”), entered into by and between the Company and Lincoln Park Capital Fund, LLC (the “Buyer”) pursuant to which the Company has agreed to issue to the Buyer shares
of the Company’s Common Stock, par value $0.001 per share (the “Common Stock”), in an amount up to Fifteen Million dollars ($15,000,000) (the “Purchase Shares”), in accordance with the terms of the Purchase
Agreement. In connection with the transactions contemplated by the Purchase Agreement, the Company has registered with the U.S. Securities & Exchange Commission the following shares of Common Stock: 

 

	 	(1)	            shares of Common Stock to be issued upon purchase from the Company by the Buyer from time to
time (the “Purchase Shares”). 

  

	 	(2)	689,258 shares of Common Stock which have been issued to the Buyer as a commitment fee (the “Initial Commitment Shares”). 


 

	 	(3)	886,189 additional Commitment Shares to be issued in connection with each purchase of Purchase Shares (the “Additional Commitment Shares” and together
with the Initial Commitment Shares, the “Commitment Shares”). 

 Pursuant to the Purchase Agreement, the Company
also has entered into a Registration Rights Agreement, dated as of October 20, 2011, with the Buyer (the “Registration Rights Agreement”) pursuant to which the Company agreed, among other things, to register the Purchase Shares
and the Commitment Shares under the Securities Act of 1933, as amended (the “Securities Act”). In connection with the Company’s obligations under the Purchase Agreement and the Registration Rights Agreement, on October
    , 2011, the Company filed a Registration Statement (File No. 333-                ) (the “Registration Statement”) with the
Securities and Exchange Commission (the “SEC”) relating to the sale of the Purchase Shares and the Commitment Shares. 
 In connection with the foregoing, we advise you that a member of the SEC’s staff has advised us by telephone that the SEC has entered an order declaring the Registration Statement effective under the
Securities Act at         P.M. on                     , 2011 and we have no knowledge, after telephonic
inquiry 







 
of a member of the SEC’s staff, that any stop order suspending its effectiveness has been issued or that any proceedings for that purpose are pending before, or threatened by, the SEC and
the Purchase Shares and the Commitment Shares are available for sale under the Securities Act pursuant to the Registration Statement and may issued without any restrictive legend. 

 

			
	 Very truly yours,

	 [Company Counsel]

		
	By:	 	 


 cc:     Lincoln Park Capital Fund, LLC 







 EXHIBIT B 

TO REGISTRATION RIGHTS AGREEMENT 
 Information About The Investor Furnished To The Company By The Investor 

Expressly For Use In Connection With The Registration Statement 
 As of the date of the Purchase Agreement, Lincoln Park Capital Fund, LLC, beneficially owned no shares of common stock of the Company. Josh Scheinfeld and Jonathan Cope, the Managing Members of Lincoln
Park Capital, LLC, are deemed to be beneficial owners of all of the shares of common stock owned by Lincoln Park Capital Fund. Messrs. Cope and Scheinfeld have shared voting and investment power over the shares being offered under the prospectus
filed with the SEC in connection with the transactions contemplated under the Purchase Agreement. Lincoln Park Capital is not a licensed broker dealer or an affiliate of a licensed broker dealer.