Document:

Discount Payoff Agreement

 Exhibit 10.3 

DISCOUNTED PAYOFF AGREEMENT 

THIS DISCOUNTED PAYOFF AGREEMENT (this “Agreement”) is entered into as of September 21, 2010, by and among ZHONE
TECHNOLOGIES CAMPUS, LLC, a California limited liability company (“Borrower”), ZHONE TECHNOLOGIES, INC., a Delaware corporation (“Guarantor”), and LBA RIV-COMPANY ZNP, LLC, a Delaware limited liability company
(“Lender”). 
 RECITALS 

A. Borrower obtained a loan in the original principal amount of $35,000,000 (the “Loan”) from Fremont
Investment & Loan, a California industrial loan association (“Fremont”) pursuant to that certain Loan and Security Agreement dated as of March 30, 2001 (as the same has been amended, the “Loan
Agreement”). Capitalized terms used herein without being defined shall have the respective meanings set forth in the Loan Agreement. 

B. Guarantor guaranteed certain of Borrower’s obligations with respect to the Loan pursuant to (i) that certain Completion and
Performance Guaranty dated as of March 30, 2001, and (ii) that certain Environmental Indemnity dated as of March 30, 2001. 

C. The Loan and all of Fremont’s right, title and interest in, to and under the Loan Documents was acquired by iStar FM Loans LLC, a
Delaware limited liability company (“iStar”) on or about June 29, 2007. 
 D. Lender has entered into an
agreement to acquire all of iStar’s right, title and interest in, to and under the Loan Documents, and the closing of such acquisition is scheduled to occur on or about September 30, 2010. 

E. Lender has agreed to accept a cash payment from Borrower in full and complete satisfaction of all obligations of Borrower and
Guarantor under the Loan Documents on and subject to the terms and conditions of this Agreement. 
 NOW, THEREFORE, in
consideration of the foregoing, and the various agreements set forth herein below, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledge, the parties hereto agree as follows: 

1. Discounted Payoff Amount; Satisfaction of Debt. Subject to satisfaction of the conditions set forth in Section 2,
Lender agrees to accept the Payoff Amount (as defined below) in full and complete satisfaction of all obligations of Borrower and Guarantor to Lender under the Loan Documents; provided, however, receipt of such payment shall not
release Borrower or Guarantor from (a) any obligation under this Agreement or from any claim or liability of such party to Lender arising out of a breach of, or misrepresentation made in, this Agreement, or (b) any indemnity obligations of
Borrower or Guarantor contained in the Loan Documents relating to third-party claims against Lender by entities unaffiliated to Lender which by the express terms of the Loan Documents survive the repayment of the Loan (the obligations in clauses
(a) and (b) are referred to herein as the “Continuing Obligations”). 
 2. Conditions
Precedent. Sections 1 and 4 of this Agreement shall not be effective unless and until each of the following conditions precedent (the “Conditions Precedent”) have been satisfied no later than 5:00 p.m. Los Angeles
time on September 30, 2010 (provided, however, this Agreement shall be effective with respect to all other terms and conditions immediately upon the satisfaction of the condition precedent in Section 2(a) below):

  

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 (a) Lender shall have acquired the Loan and the Loan Documents from iStar; 

(b) Borrower, Guarantor, and Lender shall have duly executed and delivered this Agreement; 

(c) Lender shall have received immediately available funds in an amount equal to Seventeen Million Five Hundred Thousand Dollars
($17,500,000.00), plus (i) fifty percent (50%) of the principal/interest payment that is due under the Loan for September 1, 2010 to the date Lender acquires the Loan from iStar (the “Loan Acquisition Date”);
(ii) an amount equal to fifty percent (50%) of the interest having accrued on the Loan pursuant to the Loan Documents between the Loan Acquisition Date and the date on which Lender receives the Payoff Amount; plus (iii) an
amount equal to fifty percent (50%) of the closing costs and legal fees incurred by Lender in acquiring the Loan from iStar (the “Payoff Amount”); 

(d) LBA RIV-COMPANY V, LLC, a Delaware limited liability company (“Buyer”) shall have acquired fee title to the Property
from Borrower pursuant to that certain Real Estate Purchase Agreement dated as of September 21, 2010, in accordance with all of the terms and conditions contained in said agreement. 

Upon the satisfaction of the foregoing conditions precedent, Lender agrees to execute and deliver such documents as may be required by the title company
insuring fee title to the Property acquired by Buyer in order to release and reconvey the lien of the Deed of Trust. 
 For the avoidance of
doubt, Lender shall have no obligation or liability under this Agreement whatsoever in the event Lender fails to acquire the Loan from iStar for any reason whatsoever. 

3. Representations and Warranties by Borrower and Guarantor. 

(a) Borrower represents and warrants that (i) Borrower is duly organized, validly existing, and in good standing under the laws of
the State of California, (ii) Borrower has full power and authority to enter into this Agreement and perform its obligations hereunder, and (iii) Borrower’s execution and delivery of this Agreement have been duly authorized by all
necessary company action. By executing this Agreement, Borrower acknowledges that it has read, consulted with its attorneys regarding, and understands this Agreement and the other Loan Documents executed in connection herewith. 

(b) Guarantor represents and warrants that (i) Guarantor is duly organized, validly existing, and in good standing under the laws of
the State of Delaware, (ii) Guarantor has full power and authority to enter into this Agreement and perform its obligations hereunder, and (iii) Guarantor’s execution and delivery of this Agreement have been duly authorized by all
necessary company action. By executing this Agreement, Guarantor acknowledges that it has read, consulted with its attorneys regarding, and understands this Agreement and the other Loan Documents executed in connection herewith. 

(c) No proceedings are (i) pending against Borrower or Guarantor or (ii) to the best of such party’s knowledge, threatened
against it before any governmental authority or in any court (including, without limitation, any bankruptcy court). There is no action, order, writ, injunction, judgment or decree, or any claim, suit, litigation, proceeding, labor dispute,
arbitration, or governmental audit or investigation pending or, to the best of Borrower’s and Guarantor’s knowledge, threatened against Borrower or Guarantor that would affect Borrower’s or Guarantor’s ability to perform its
obligations under this Agreement or otherwise affect the transactions contemplated by this Agreement. 
  

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 (d) No agent, broker, person or firm acting on behalf of, or under the authority of,
Borrower or Guarantor is or will be entitled, directly or indirectly, to any commission, broker’s or finder’s fees or other remuneration from Borrower or Guarantor, or to Borrower’s and Guarantor’s knowledge, from any other
party, in connection with any of the transactions contemplated by this Agreement. 
 4. Waiver and Release of Claims.
Each party hereto, and anyone claiming by, through or under such party (each, a “Releasing Party”) hereby waives its right to recover from and fully, finally, absolutely, and irrevocably releases each other party hereto and such
other parties’ officers, directors, employees, representatives, agents, affiliates, and each such parties’ direct and indirect constituent owners, and each of the foregoing parties’ successors and assigns (collectively, the
“Released Parties”) from any and all claims of any and every character that a Releasing Party may now have against any of the Released Parties for any cost, loss, liability, damage, expense, demand, fine, penalty, action or cause of
action arising from or related to the Loan, the Loan Documents, or any matters related thereto (collectively, “Released Claims”), excluding any obligation of a Released Party arising under this Agreement; provided,
however, (y) in no event shall Borrower or Guarantor be released from, nor shall the foregoing waiver and release provisions apply to, any of the Continuing Obligations, and (z) in the event that any Releasing Party brings any
action against a Released Party seeking payment on, or any other relief with respect to, any Released Claim, the foregoing waiver and release of such Releasing Party by such Released Party shall be of no force or effect. The foregoing waiver and
release includes claims of which the Releasing Party is presently unaware or which the Releasing Party does not presently suspect to exist which, if known by the Releasing Party, would materially affect the Releasing Party’s release of the
Released Parties, and including any and all claims that are direct and/or indirect, contingent or matured, of whatever kind or nature, for or because of any matter or things done, omitted or permitted to be done by any of the Released Parties, at
law or in equity. Each Releasing Party understands, acknowledges and agrees that (a) the waiver and release set forth above may be pleaded as a full and complete defense and may be used as a basis for an injunction against any action, suit or
other proceeding which may be instituted, prosecuted or attempted in breach of the provisions of such release, (b) no fact, event, circumstance, evidence, or transaction which could now be asserted or which may hereafter be discovered shall
affect in any manner the final, absolute and unconditional nature of the waiver and release set forth above, (c) it realizes and acknowledges that factual matters now unknown to it may have given or may hereafter give rise to causes of action,
claims, demands, debts, controversies, damages, costs, losses and expenses which are presently unknown, unanticipated and unsuspected, and it further agrees, represents and warrants that this release has been negotiated and agreed upon in light of
that realization and that it nevertheless hereby intends to release, discharge and acquit the Released Parties from any and all such unknown causes of action, claims, demands, debts, controversies, damages, costs, losses and expenses which in any
way arise out of, are connected with, or relate to, the Loan, (d) it understands and acknowledges the significance and consequences of the foregoing release and waiver and each has been advised by independent legal counsel concerning the same.
In furtherance of this intention, each Releasing Party expressly waive any and all rights conferred upon it by the provisions of California Civil Code Section 1542, and expressly consents that this Release shall be given full force and
effect according to each and all of its express terms and provisions. Section 1542 provides: 
 “A GENERAL
RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS OR HER FAVOR AT THE TIME OF EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM OR HER MUST HAVE MATERIALLY AFFECTED HIS OR HER SETTLEMENT WITH THE DEBTOR.”

 Each Releasing Party hereby understands and acknowledges the significance and consequences of such release and specific waiver of
Section 1542 and has been advised by independent legal counsel concerning the same. 
  

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	By:	 	  
	    	By:	 	  
	    	By:	 	  

		 	Borrower’s Initials	    		 	Guarantor’s Initials	    		 	Lender’s Initials

 Each Releasing Party hereby
represents and warrants that (i) it owns all of the purported claims, rights, demands and causes of action that it is releasing by the foregoing release and that no other person or entity has any interest in said claims, rights, demands or
causes of action by reason of any contract or dealing with such Releasing Party, and (ii) it has not assigned to any other person or entity all or any part of such claims, rights, demands or causes of action. 

5. Taxes. Borrower and Guarantor agree to pay any and all taxes payable to any applicable governmental authority by Borrower or
Guarantor with respect to any portion of the Loan forgiven by Lender in connection herewith (“Forgiven Debt”) and Borrower and Guarantor hereby agree, on a joint and several basis, to indemnify, defend, and hold Lender and all other
Released Parties harmless from and against any and all federal, state, or local taxes payable on or with respect to any such Forgiven Debt. Borrower and Guarantor acknowledge and agree that neither Lender nor its representatives have provided any
advice or consultation as to whether any portion of the Forgiven Debt is taxable by any applicable governmental authority, and that Borrower and Guarantor have sought and received the advice of independent and competent legal counsel and/or
accounting consultants with respect thereto. 
 6. Reinstatement of Obligations. Notwithstanding anything to the contrary
contained in this Agreement, all obligations of Borrower and Guarantor to Lender discharged, waived, or released pursuant to this Agreement (including, without limitation, any portion of the principal of or interest on the Loan waived or reduced
pursuant to this Agreement) will be reinstated in full if for any reason Lender is required to return any portion of any payment received by Lender to Borrower or pay the same over to any other person or entity for any reason whatsoever. 

7. Entire Agreement. This Agreement embodies the entire agreement between the parties with respect to the subject matter hereof
and there are no agreements, representations or warranties, oral or written, between or among the parties other than those set forth in this Agreement. 

8. Amendments. This Agreement may not be modified or changed, in whole or in part, except by a supplemental agreement signed by
all of parties. 
 9. Successors and Assigns Bound. This Agreement shall bind and inure to the benefit of the parties
hereto and their respective successors and assigns. 
 10. Governing Law. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS
HEREUNDER SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA. 
 11. Counterparts.
This Agreement may be executed by manual or facsimile signature or email signature sent in .pdf or .tif format in any number of counterparts, each of which shall be an original, but which together constitute one and the same instrument. 

12. Rights and Remedies Cumulative. The rights and remedies provided by this Agreement are cumulative, and the use of any one
right or remedy by any party shall not preclude or waive the right to use any or all other remedies. Such rights and remedies are given in addition to any other rights, the parties may have by law, statute, ordinance or otherwise. 

13. Severability. If any provision of this Agreement or the application thereof to any person or circumstance shall be invalid,
illegal or unenforceable to any extent, the remainder of this Agreement 
  

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and the application thereof shall not be affected and shall be enforceable to the fullest extent permitted by law. 

14. Third Party Beneficiaries. No person other than a party hereto shall be entitled or be deemed to be entitled to any benefits
or rights hereunder, nor be authorized or entitled to enforce any rights or remedies hereunder or by reason hereof. 
 15.
Drafting. The parties hereto shall be deemed the mutual drafters of this Agreement. 
 16. Attorneys’ Fees.
If any party hereto becomes involved in litigation (including bankruptcy proceedings), arbitration or other proceedings arising out of or relating to this Agreement, the court in litigation (including bankruptcy proceedings) or arbitrator in the
arbitration shall award legal expenses (including, but not limited to attorneys’ fees, court costs and other legal expenses, and including reasonable fees charged by in-house counsel) to the prevailing party. The award for legal expenses shall
not be computed in accordance with any court schedule, but shall be as necessary to fully reimburse all attorneys’ fees and other legal expenses paid or incurred in good faith. The terms “attorneys’ fees” or “attorneys’
fees and costs” shall include all reasonable fees and expenses incurred with respect to appeals, arbitrations and bankruptcy proceedings, and whether or not any action or proceeding is brought with respect to the matter for which said fees and
expenses were incurred. 
 17. Confidentiality. Each party hereto agrees to keep this Agreement and the terms and
conditions contained herein confidential and not to disclose the same to any persons other than their legal counsel and other advisors (except as may be required by law or applicable legal process). 

[Signatures on next page] 
  

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 IN WITNESS WHEREOF, the parties have duly executed this Agreement as of the date first above
written. 
  

															
	LENDER:	  	LBA RIV-COMPANY ZNP, LLC,
		  	a Delaware limited liability company
			
		  	By:	    	 LBA REIT IV, LLC, a Delaware limited liability company,

its Sole Member and Manager

				
		  		    	By:	    	LBA Realty Fund IV, L.P., a Delaware limited partnership,
		  		    		    	its Sole Manager
					
		  		    		    	By:	    	LBA Management Company IV, LLC, a Delaware limited liability company, its General Partner
						
		  		    		    		    	By:	    	LBA Realty LLC, a Delaware limited liability company, its Manager
							
		  		    		    		    		    	By:	    	LBA Inc., a California corporation
		  		    		    		    		    		    	its Managing Member
								
		  		    		    		    		    		    	By:	 	  

		  		    		    		    		    		    	Name:	 	  

		  		    		    		    		    		    	Title:	 	  

 

							
	BORROWER:	 		 	ZHONE TECHNOLOGIES CAMPUS, LLC,
		 		 	a California limited liability company
				
		 		 	By:	 	  

		 		 	Name:	 	  

		 		 	Title:	 	  

			
	GUARANTOR:	 		 	ZHONE TECHNOLOGIES, INC.,
		 		 	a Delaware corporation
				
		 		 	By:	 	  

		 		 	Name:	 	  

		 		 	Title:	 	  

  

					
		 	S-1	 	Discounted Payoff AgreementForm of Warrant to Purchase Common Stock

 EXHIBIT 4.1 

 

					
	No.     	  	                          
  	  	     Shares

THE SECURITIES PRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. NO SALE, GIFT, TRANSFER OR OTHER DISPOSITION
THEREOF OR OF ANY INTEREST THEREIN SHALL BE VALID OR EFFECTIVE UNLESS AND UNTIL SUCH SECURITIES ARE (I) REGISTERED PURSUANT TO THE PROVISIONS OF SUCH ACT AND REGISTERED OR QUALIFIED UNDER APPLICABLE STATE SECURITIES OR ‘BLUE SKY’ LAWS
OR (II) EXEMPT FROM SUCH REGISTRATION. 
 Void after September 16, 2015 

WARRANT TO PURCHASE SHARES 

OF 
 CAPITAL
STOCK 
 OF 

ARROWHEAD RESEARCH CORPORATION, 

A Delaware corporation 

This certifies that
                             (the “Holder”), or assigns, for value received,
is entitled to purchase from Arrowhead Research Corporation (the “Company”), subject to the terms set forth below, including the terms and conditions set forth in Section 6, a maximum of
                             fully-paid and non-assessable shares (subject to adjustment as provided
herein) of the Company’s Common Stock, $0.001 par value (“Common Stock”), for cash at a price of $0.50 per share (the “Exercise Price”) (subject to adjustment as provided herein) at any time or
from time to time on or after March 17, 2011, (the “Initial Exercise Date”), and up to and including 5:00 p.m. (New York City Time) on September 16, 2015 (the “Expiration Date”) upon
surrender to the Company at its principal office (or at such other location as the Company may advise the Holder in writing) of this Warrant properly endorsed with the Notice of Subscription attached hereto duly completed and signed and upon payment
in cash or by check of the aggregate Exercise Price for the number of shares for which this Warrant is being exercised determined in accordance with the provisions hereof. The Exercise Price is subject to adjustment as provided in Section 3 of
this Warrant. This Warrant is issued subject to the following terms and conditions: 
 1. Exercise. 

The Holder may exercise this Warrant at any time or from time to time on or after the Initial Exercise Date and on or prior to the
Expiration Date, for all or any part of the Warrant Shares (but not for a fraction of a share of Common Stock) which may be purchased hereunder, as that number may be adjusted pursuant to Section 3 of this Warrant. Except as set forth below,
the Company agrees that the Warrant Shares purchased under this Warrant shall be and are deemed to be issued to the Holder hereof as the record owner of such Warrant Shares as of the close of business on the date on which this Warrant shall have
been surrendered, properly endorsed, the completed and executed Notice of Subscription delivered, and payment in cash made for such Warrant Shares (such date, a “Date of Exercise”). Certificates for the Warrant Shares so
purchased, together with any other securities or property to which the Holder hereof is entitled upon such exercise, shall be delivered to the Holder hereof by the Company at the Company’s expense as soon as practicable after the rights
represented by this Warrant have been so exercised, but in any event not later than the third trading day following the Date of Exercise. In case of a purchase of less than all the Warrant Shares which may be purchased under this Warrant, the
Company 

					
	No.     	  	                          
  	  	     Shares

  

 
shall cancel this Warrant and execute and deliver to the Holder hereof within a reasonable time a new Warrant or Warrants of like tenor for the balance of the Warrant Shares purchasable under the
Warrant surrendered upon such purchase. Each stock certificate so delivered shall be registered in the name of such Holder and issued with legends in accordance with the Subscription Agreement pursuant to which this Warrant was originally issued
(the “Subscription Agreement”). 
 2. Shares to be Fully Paid. The Company covenants and agrees
that all Warrant Shares, will, upon issuance and, if applicable, payment of the applicable Exercise Price, be duly authorized, validly issued, fully paid and non-assessable, and free of all preemptive rights, liens and encumbrances, except for
restrictions on transfer provided for herein. 
 3. Adjustment of Exercise Price and Number of Shares. The Exercise Price
and the total number of Warrant Shares shall be subject to adjustment from time to time upon the occurrence of certain events described in this Section 3. Upon each adjustment of the Exercise Price, the Holder of this Warrant shall thereafter
be entitled to purchase, at the Exercise Price resulting from such adjustment, the number of shares obtained by multiplying the Exercise Price in effect immediately prior to such adjustment by the number of shares purchasable pursuant hereto
immediately prior to such adjustment, and dividing the product thereof by the Exercise Price resulting from such adjustment. 

a. Subdivision or Combination of Stock. In the event the outstanding shares of the Company’s Common Stock shall be increased
by a stock dividend payable in Common Stock, stock split, subdivision, or other similar transaction occurring after the date hereof (an “Upward Adjustment Event”) into a greater number of shares of Common Stock, the Exercise Price
in effect immediately prior to such subdivision shall be proportionately reduced and the number of Common Stock issuable hereunder proportionately increased; if this Warrant is being exercised to purchase shares of Preferred Stock following an
Upward Adjustment Event, the Exercise Price shall be unaffected by such event, but the Common Stock conversion ratio for the Preferred Stock shall be adjusted so that upon the conversion of any Preferred Stock into Common Stock, the Holder would
receive the name number of shares of Common Stock as if the Warrant had originally been exercised for Common Stock. Conversely, in the event the outstanding shares of the Company’s Common Stock shall be decreased by reverse stock split,
combination, consolidation, or other similar transaction occurring after the date hereof into a lesser number of shares of Common Stock, the Exercise Price in effect immediately prior to such combination shall be proportionately increased and the
number of Common Stock issuable hereunder proportionately decreased and a corresponding change in the conversion ratio for the Preferred Stock shall be similarly adjusted. 

b. Reclassification. If any reclassification of the capital stock of the Company or any reorganization, consolidation, merger, or
any sale, lease, license, exchange or other transfer (in one transaction or a series of related transactions) of all or substantially all, of the business and/or assets of the Company (each, a “Reclassification Event”) shall
be effected in such a way that holders of Common Stock shall be entitled to receive stock, securities, or other assets or property, then, as a condition of such Reclassification Event lawful and adequate provisions shall be made whereby the Holder
hereof shall thereafter have the right to purchase and receive (in lieu of the shares of Common Stock of the Company immediately theretofore purchasable and receivable upon the exercise of the rights represented hereby) such shares of stock,
securities, or other assets or property as may be issued or payable with respect to or in exchange for a number of outstanding shares of such Common Stock equal to the number of shares of such stock immediately theretofore purchasable and receivable
upon the exercise of the rights represented hereby. In any Reclassification Event, appropriate provision shall be made with respect to the rights and interests of the Holder of this Warrant to the end that the provisions hereof (including, without
limitation, provisions for adjustments of the Exercise Price and of the number of Warrant Shares), shall thereafter be applicable, as nearly as may be, in relation to any shares of stock, securities, or assets thereafter deliverable upon the
exercise hereof. 
  

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	No.     	  	                          
  	  	     Shares

  

 c. Notice of Adjustment. Upon any adjustment of the Exercise Price or any
increase or decrease in the number of Warrant Shares, the Company shall give written notice thereof at the address of such Holder as shown on the books of the Company. The notice shall be prepared and signed by the Company’s Chief Executive
Officer or Chief Financial Officer and shall state the Exercise Price resulting from such adjustment and the increase or decrease, if any, in the number of shares purchasable at such price upon the exercise of this Warrant, setting forth in
reasonable detail the method of calculation and the facts upon which such calculation is based. 
 4. Redemption.

 a. Subject to the provisions of this Section 4, at any time after the Initial Exercise Date, if (i) a period of at
least twelve (12) months and one day has elapsed since the Closing Date; (ii) the last reported sale price of the Common Stock on the principal stock exchange or quotation service on which the Common Stock trades is greater than $2.00
(subject to adjustment pursuant to Section 3 hereof) for at least thirty (30) trading days during any consecutive sixty (60) trading-day period and (ii) the Company has fully honored, in accordance with the terms of this Warrant,
all Notices of Subscription delivered prior to 5:00 p.m. (New York City time) on the Call Date (as defined below), then the Company may redeem this Warrant at a price of $1.00 (the “Redemption Price”). To exercise this right,
the Company shall, not less than thirty (30) days prior to the Call Date, deliver to the Holder an irrevocable written notice (the “Call Notice”) informing the Holder that the Common Stock has traded at the required
levels for the specified time periods and specifying the date on which the Company shall redeem this Warrant in accordance with this Section 4 (the “Call Date”). If the Warrant is not exercised on or before the Call
Date, then this Warrant shall be cancelled at 5:00 p.m. (New York City time) on the Call Date, and the Company shall thereafter deliver the Redemption Price to such Holder at its address of record. The Company covenants and agrees that it will honor
all Notices of Subscription with respect to Warrant Shares that are tendered from the time of delivery of the Call Notice through 5:00 p.m. (New York City time) on the Call Date. For the avoidance of doubt, the Company’s delivery to Holder of
the Redemption Price of $1.00 shall be effective to redeem this Warrant in its entirety pursuant to this Section 4, without regard to the number of Warrant Shares then potentially issuable upon exercise of the Warrant. 

b. If (A) the Holder timely delivers to the Company a notice of exercise and tenders the applicable purchase price on or before the
Call Date, and (B) the Company is unable to issue the full number of Warrant Shares potentially issuable as of the Call Date solely due to the limitations in Section 6.1 regarding the Holder’s acquisition of more than the Maximum
Percentage (as may have been adjusted prior to the Call Date pursuant to Section 6(c), but in any event not to be lower than 4.999%), then in such instance and subject to the foregoing limitation, the Company shall honor the exercise only to
the extent allowed under Section 6.1 based on the total shares outstanding at the close of business on the Call Date and shall promptly return that portion of the exercise price not applied to the purchase of Warrant Shares. The Warrant Shares
that cannot be acquired as of the Call Date shall remain issuable hereunder and the Warrant shall not be redeemed with respect to those Warrant Shares. 

5. Limitation on Exercise. 

a. Holder’s 20% Restrictions. The Company shall not effect any exercise of this Warrant, and the Holder shall not have the
right to exercise any portion of this Warrant, to the extent that as a result of giving effect to such exercise, such Holder (together with such Holder’s affiliates, and any other person or entity acting as a group together with such Holder or
any of such Holder’s affiliates) 
  

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	No.     	  	                          
  	  	     Shares

  

 
would beneficially own in excess of 19.99% (the “Maximum Percentage”) of the shares of Common Stock outstanding immediately after giving effect to such exercise. For
purposes of the foregoing sentence, the aggregate number of shares of Common Stock beneficially owned (directly or indirectly through Warrant Shares or otherwise) by such Holder and its affiliates shall include the number of shares of Common Stock
issuable upon exercise of this Warrant with respect to which the determination of such sentence is being made, but shall exclude the number of shares of Common Stock which would be issuable upon (A) exercise of the remaining, unexercised
portion of this Warrant beneficially owned by such Holder or any of its affiliates and (B) exercise or conversion of the unexercised or unconverted portion of any other securities of the Company (including, without limitation, any other
preferred stock or warrants) subject to a limitation on conversion or exercise analogous to the limitation contained herein beneficially owned by such Holder or any of its affiliates. The limitations contained in this Section a shall apply only to
the extent required under NASDAQ Marketplace Rule 5635(b). The provisions of this paragraph shall be implemented in a manner otherwise than in strict conformity with the terms of this Section a to correct this paragraph (or any portion hereof) which
may be defective or inconsistent with the intended Maximum Percentage herein contained or to make changes or supplements necessary or desirable to properly give effect to such limitation. The limitations contained in this Section a shall apply to a
successor Holder of this Warrant. 
 b. Calculation of Ownership. Except as set forth in the preceding Section, for
purposes of this Section 5, beneficial ownership shall be calculated in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder, it being acknowledged by the Holder that the Company is not
representing to such Holder that such calculation is in compliance with Section 13(d) of the Exchange Act and such Holder is solely responsible for any schedules required to be filed in accordance therewith. To the extent that the limitation
contained in this Section 5 applies, the determination of whether this Warrant is exercisable (in relation to other securities owned by such Holder) and of which a portion of this Warrant is exercisable shall be in the sole discretion of the
Holder, and the submission of a Notice of Subscription shall be deemed to be such Holder’s determination of whether this Warrant is exercisable (in relation to other securities owned by such Holder) and of which portion of this Warrant is
exercisable, in each case subject to such aggregate percentage limitation, and the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a determination as to any group status as contemplated above
shall be determined in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. For purposes of this Section 5, in determining the number of outstanding shares of Common Stock, the Holder may
rely on the number of outstanding shares of Common Stock as reflected in (x) the Company’s most recent Form 10-Q or Form 10-K, as the case may be, (y) a more recent public announcement by the Company or (z) any other notice by
the Company or the Company’s transfer agent setting forth the number of shares of Common Stock outstanding. Upon the written or oral request of the Holder, the Company shall within two trading days confirm orally and in writing to such Holder
the number of shares of Common Stock then outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities of the Company, including this Warrant, by such
Holder or its affiliates since the date as of which such number of outstanding shares of Common Stock was reported. 
 c.
Reductions to Maximum Percentage. The Holder may, at any time and upon providing the Company with written notice, lower the Maximum Percentage to any percentage below 19.99% (such amount being the “Adjusted Maximum
Percentage”). Upon providing the Company with at least 61 days prior written notice, the Holder may increase the Adjusted Maximum Percentage, up to 19.99% of the shares of Common Stock outstanding immediately after giving effect to such
exercise. 
  

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	No.     	  	                          
  	  	     Shares

  

 d. Liquidation Event. Notwithstanding the limitations set forth in this
Section 6, but subject to NASDAQ Marketplace Rule 5635(b), this Warrant shall be fully exercisable upon a Liquidation Event (defined below). For purposes of this Section 6.4, “Liquidation Event” shall mean the
consummation of any of the following transactions: (a) a merger or consolidation in which the Company is not the surviving corporation (other than a merger or consolidation with a wholly-owned subsidiary, a reincorporation of the Company in a
different jurisdiction, or other transaction in which there is no substantial change in the shareholders of the Company), (b) the sale of all or substantially all of the assets of the Company, or (c) the acquisition, sale, or transfer of
more than 50% of the outstanding shares of the Company by tender offer or similar transaction. 
 6. No Voting or Dividend
Rights. Nothing contained in this Warrant shall be construed as conferring upon the holder hereof the right to vote or to consent to receive notice as a shareholder of the Company on any other matters or any rights whatsoever as a shareholder of
the Company. No dividends or interest shall be payable or accrued in respect of this Warrant or the interest represented hereby or the shares purchasable hereunder until, and only to the extent that, this Warrant shall have been exercised.

 7. Compliance with Securities Act. The Holder of this Warrant, by acceptance hereof, agrees that this Warrant is being
acquired for Holder’s own account and not for any other person or persons, for investment purposes and that it will not offer, sell, or otherwise dispose of this Warrant except under circumstances which will not result in a violation of the
Securities Act of 1933 or any applicable state securities laws. 
 8. Modification and Waiver. This Warrant and any
provision hereof may be changed, waived, discharged, or terminated only by an instrument in writing signed by the party against whom enforcement of the same is sought. 

9. Notices. Any notice, request, or other document required or permitted to be given or delivered to the Holder hereof or the
Company shall be delivered by hand or messenger or shall be sent by certified mail, postage prepaid, or by overnight courier to each such Holder at its address as shown on the books of the Company or to the Company at its principal place of business
or such other address as either may from time to time provide to the other. Each such notice or other communication shall be treated as effective or having been given: (i) when delivered if delivered personally, (ii) if sent by registered
or certified mail, at the earlier of its receipt or three business days after the same has been registered or certified as aforesaid, (iii) if sent by overnight courier, on the next business day after the same has been deposited with a
nationally recognized courier service, or (iv) the date of transmission, if such notice or communication is delivered via facsimile prior to 5:00 p.m. (New York City time) on a trading day at a facsimile number as either may from time to time
provide to the other and a confirming copy of such notice is sent the same day by first class mail. 
 10. Governing Law.
All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be governed by and construed and enforced in accordance with the internal laws of the State of Delaware, without regard to the principles of
conflicts of law thereof. Each party agrees that all legal proceedings concerning the interpretations, enforcement and defense of this Warrant and the transactions herein contemplated (“Proceedings”) (whether brought against
a party hereto or its respective Affiliates, employees or agents) shall be commenced exclusively in the state and federal courts sitting in the City of Delaware (the “Courts”). Each party hereto hereby irrevocably submits to
the exclusive jurisdiction of the Courts 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
Proceeding, any claim that it is not personally subject to the jurisdiction of any Court, or that such Proceeding has been commenced in an improper or 

 

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inconvenient forum. Each party hereto hereby irrevocably waives personal service of process and consents to process being served in any such Proceeding by mailing a copy thereof via registered or
certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Warrant 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. Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by
jury in any legal proceeding arising out of or relating to this Warrant or the transactions contemplated hereby. If either party shall commence a Proceeding to enforce any provisions of this Warrant, then the prevailing party in such Proceeding
shall be reimbursed by the other party for its reasonable attorney’s fees and other costs and expenses incurred with the investigation, preparation and prosecution of such Proceeding. 

11. Lost or Stolen Warrant. Upon receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction, or
mutilation of this Warrant and, in the case of any such loss, theft or destruction, upon receipt of an indemnity reasonably satisfactory to the Company, or in the case of any such mutilation, upon surrender and cancellation of such Warrant, the
Company, at its expense, will make and deliver a new Warrant, of like tenor, in lieu of the lost, stolen, destroyed or mutilated Warrant. 

12. Fractional Shares. No fractional shares of Common Stock shall be issued upon exercise of this Warrant. The Company shall, in
lieu of issuing any fractional share of Common Stock, pay the Holder entitled to such fraction a sum in cash equal to such fraction (calculated to the nearest 1/100th of a share) multiplied by the then effective Exercise Price on the date the Notice
of Subscription is received by the Company. 
 13. Acknowledgement. Upon the request of the Holder, the Company will at
any time during the period this Warrant is outstanding acknowledge in writing, in form satisfactory to Holder, the continued validity of this Warrant and the Company’s obligations hereunder. 

14. Successors and Assigns. This Warrant and the rights evidenced hereby shall inure to the benefit of and be binding upon the
successors of the Company and the successors and assigns of the Holder. The provisions of this Warrant are intended to be for the benefit of all Holders from time to time of this Warrant, and shall be enforceable by any such Holder. 

15. Severability of Provisions. In case any one or more of the provisions of this Warrant shall be invalid or unenforceable in any
respect, the validity and enforceability of the remaining terms and provisions of this Warrant shall not in any way be affected or impaired thereby and the parties will attempt in good faith to agree upon a valid and enforceable provision which
shall be a commercially reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Warrant. 
  

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 IN WITNESS WHEREOF, the Company has caused this Warrant to be duly executed by its
officer, thereunto duly authorized on this      day of August 2010. 
  

			
	“Company”
	
	 ARROWHEAD RESEARCH CORPORATION,

a Delaware corporation

		
	By:	 	  

“Holder” 
 Name 

Address 
  

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 NOTICE OF SUBSCRIPTION 

(To be signed only upon exercise of Warrant) 
  

	To:	Arrowhead Research Corporation 

The undersigned, the holder of the attached Common Stock Warrant, hereby elects to exercise the purchase right
represented by such Warrant for, and to purchase thereunder,     
1 shares of Common Stock of Arrowhead Research Corporation
and makes payment of $         therefore. 
 By its delivery of this Notice of
Subscription, the undersigned represents and warrants to the Company that in giving effect to the exercise evidenced hereby the Holder will not beneficially own in excess of the number of shares of Common Stock (determined in accordance with
Section 13(d) of the Securities Exchange Act of 1934) permitted to be owned under Warrant to which this notice relates. 
 The undersigned
requests that certificates for such shares be issued in the name of, and delivered to:              

whose address is:
                            . 

DATED:                      

 

			
	  

	(Signature must conform in all respects to name of Holder as specified on the face of the Warrant)
		
	Name:	 	  

		
	Title:	 	  

 

	1
	 Insert here the number of shares called for on the face of the Warrant (or, in the case of a partial exercise, the portion thereof as to which the
Warrant is being exercised), in either case without making any adjustment for any stock or other securities or property or cash which, pursuant to the adjustment provisions of the Warrant, may be deliverable upon exercise.

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