Document:

Warrant Agent Agreement

 Exhibit 4.1 
  

 SIPEX CORPORATION 
 and 
 WELLS FARGO BANK, NATIONAL ASSOCIATION, 
 as Warrant Agent 
  

 WARRANT AGENT AGREEMENT 
 Dated as of May 16, 2006 
  

 WARRANT AGENT AGREEMENT 
 TABLE OF CONTENTS 
  

			
	SECTION 1. Appointment of Warrant Agent	  	1
	 SECTION 2. Warrant Certificates
	  	1
	 SECTION 3. Execution of Warrant Certificates
	  	1
	 SECTION 4. Registration
	  	2
	 SECTION 5. Registration of Transfers and Exchanges
	  	2
	 SECTION 6. Terms and Release of Warrants
	  	3
	 SECTION 7. Reservation of Warrant Shares.
	  	3
	 SECTION 8. Notices to Warrant holders
	  	3
	 SECTION 9. Merger, Consolidation or Change of Name of Warrant Agent
	  	3
	 SECTION 10. Warrant Agent
	  	3
	 SECTION 11. Change of Warrant Agent
	  	5
	 SECTION 12. Notices to Company and Warrant Agent
	  	6
	 SECTION 13. Supplements and Amendments
	  	6
	 SECTION 14. Successors
	  	7
	 SECTION 15. Termination
	  	7
	 SECTION 16. Governing Law
	  	7
	 SECTION 17. Benefits of This Agreement
	  	7
	 SECTION 18. Counterparts
	  	7
	 SECTION 19. Conflicting Terms
	  	8

  

	EXHIBIT	A Form of Warrant Certificate 

 WARRANT AGENT AGREEMENT (“Warrant Agent Agreement”) dated as of May 16, 2006 between Sipex
Corporation, a Delaware corporation (the “Company”), and Wells Fargo Bank, National Association, a national banking association organized and in good standing under the laws of the United States, as Warrant Agent (the “Warrant
Agent”). 
 WHEREAS, the Company has entered into a Securities Purchase Agreement dated May 16, 2006 (the “Securities Purchase
Agreement”) by and between the Company and the buyers listed in Exhibit A to the Securities Purchase Agreement pursuant to which the Company proposes to issue warrants to purchase common stock of the Company, as hereinafter described (the
“Warrants”), which in the aggregate initially entitle the holders thereof to purchase 1,679,104 shares of Common Stock of the Company (the “Common Stock” and with the Common Stock issuable on exercise of the Warrants being
referred to herein as the “Warrant Shares”). Capitalized terms used and not otherwise defined herein have the meanings ascribed thereto in the Warrant Certificate (as defined below). 
 WHEREAS, the Company desires the Warrant Agent to act on behalf of the Company, and the Warrant Agent is willing so to act, in connection with the
transfer, exchange and exercise of Warrants and other matters as provided herein; 
 NOW, THEREFORE, in consideration of the premises and the
mutual agreements herein set forth, the parties hereto agree as follows: 
 SECTION 1. Appointment of Warrant Agent. The Company
hereby appoints the Warrant Agent to act as agent for the Company in accordance with the instructions set forth hereinafter in this Agreement, and the Warrant Agent hereby accepts such appointment. The Company may from time to time appoint such
Co-Warrant Agent(s) as it may deem necessary or desirable upon ten (10) days’ prior written notice to the Warrant Agent. The Warrant Agent shall have no duty to supervise, and shall in no event be liable for, the acts or omissions of any
such Co-Warrant Agent(s). 
 SECTION 2. Warrant Certificates. The certificates evidencing the Warrants (the “Warrant
Certificates”) to be delivered pursuant to this Agreement shall be in registered form only and shall be substantially in the form set forth in Exhibit A attached hereto. The Warrant Certificates are hereby made a part of this
Agreement and the terms and conditions set forth therein are hereby incorporated herein. 
 SECTION 3. Execution of Warrant
Certificates. Warrant Certificates shall be signed on behalf of the Company by its Chairman of the Board, Chief Executive Officer, Chief Financial Officer, President or a Vice President. Each such signature upon the Warrant Certificates may be
in the form of a facsimile signature of the present or any future Chairman of the Board, Chief Executive Officer, Chief Financial Officer, President, or a Vice President and may be imprinted or otherwise reproduced on the Warrant Certificates and
for that purpose the Company may adopt and use the facsimile signature of any person who shall have been Chairman of the Board, Chief Executive Officer, Chief Financial Officer, President, or a Vice President, notwithstanding the fact that at the
time the Warrant Certificates shall be transferred or disposed of he or she shall have ceased to hold such office. 
  

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 In case any officer of the Company who shall have signed any of the Warrant Certificates shall cease to
be such officer before the Warrant Certificates so signed shall be transferred or disposed of by the Company, such Warrant Certificates nevertheless may be transferred or disposed of as though such person had not ceased to be such officer of the
Company; and any Warrant Certificate may be signed on behalf of the Company by any person who, at the actual date of the execution of such Warrant Certificate, shall be a proper officer of the Company to sign such Warrant Certificate, although at
the date of the execution of this Warrant Agent Agreement any such person was not such officer. 
 Each Warrant Certificate shall be dated
the date such Warrant Certificate was authorized to be transferred by the Company. 
 SECTION 4. Registration. The Warrant Agent, on
behalf of the Company, shall hold any unregistered Warrants. 
 The Company and the Warrant Agent may deem and treat the registered holder(s)
of the Warrant Certificates as the absolute owner(s) thereof (notwithstanding any notation of ownership or other writing thereon made by anyone), for all purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the
contrary. 
 SECTION 5. Registration of Transfers and Exchanges. The Warrant Agent shall from time to time, subject to the limitations
and on the terms and conditions set forth in the Warrant Certificates, register the transfer of any outstanding Warrant Certificates upon the records to be maintained by it for that purpose, upon surrender thereof duly endorsed or accompanied (if so
required by the Company) by a written instrument or instruments of transfer in form satisfactory to the Company, duly executed by the registered holder or holders thereof or by the duly appointed legal representative thereof or by a duly authorized
attorney. Upon any such registration of transfer, a new Warrant Certificate shall be issued to the transferee(s) and the surrendered Warrant Certificate shall be cancelled by the Warrant Agent. Cancelled Warrant Certificates shall thereafter be
disposed of by the Warrant Agent in its customary manner. 
 Subject to the terms of the Warrant Certificates, Warrant Certificates may be
exchanged at the option of the holder(s) thereof, when surrendered to the Warrant Agent at its principal corporate trust office, which is currently located at the address listed in Section 12 hereof, for another Warrant Certificate or other
Warrant Certificates of like tenor and representing in the aggregate a like number of Warrants. Any holder desiring to exchange a Warrant Certificate shall deliver a written request to the Warrant Agent, and shall surrender, duly endorsed or
accompanied (if so required by the Warrant Agent) by a written instrument or instruments of transfer in form satisfactory to the Warrant Agent, the Warrant Certificate or Certificates to be so exchanged. Warrant Certificates surrendered for exchange
shall be cancelled by the Warrant Agent. Such cancelled Warrant Certificates shall then be disposed of by such Warrant Agent in its customary manner. 
 The Warrant Agent is hereby authorized to transfer, in accordance with the provisions of this Section 5, the new Warrant Certificates required pursuant to the provisions of this Section 5. 
  

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 SECTION 6. Terms and Exercise of Warrants. A Warrant may be exercised, subject to the terms and
conditions therein, upon surrender to the Company at the principal corporate trust office of the Warrant Agent, which is currently located at the address listed in Section 12 hereof. 
 The Warrant Agent may assume that any Warrant presented for exercise is permitted to be so exercised under applicable law and shall have no liability for
acting in reliance on such assumption. All Warrant Certificates surrendered upon exercise of Warrants shall be canceled by the Warrant Agent. Such canceled Warrant Certificates shall then be disposed of by the Warrant Agent in its customary manner.
The Warrant Agent shall account promptly to the Company with respect to Warrants exercised and concurrently pay to the Company all monies received by the Warrant Agent for the purchase of the Warrant Shares through the exercise of such Warrants to
the extent such Warrant is not exercised as a Cashless Exercise by the holder of the Warrant pursuant to Section 2(e) of the Warrant. 
 The Warrant Agent shall keep copies of this Agreement and any notices given or received hereunder available for inspection by the holders with reasonable prior written notice during normal business hours at its corporate trust office, which
is currently located at the address listed in Section 12 hereof. 
 SECTION 7. Reservation of Warrant Shares. The Warrant Agent
shall have no duty to verify availability of any shares of Common Stock set aside pursuant to Section 4(b) of the Warrant Certificates. The Company will keep a copy of this Agreement on file with the Transfer Agent (used hereinafter as such
term is defined in the Warrant Certificates) and with every subsequent transfer agent for any shares of the Company’s Common Stock issuable upon the exercise of the rights of purchase represented by the Warrants. The Warrant Agent is hereby
irrevocably authorized to requisition from time to time from such Transfer Agent the stock certificates required to honor outstanding Warrants upon exercise thereof in accordance with the terms of this Agreement. The Company will supply such
Transfer Agent with duly executed certificates for such purposes and will provide or otherwise make available any cash which may be payable as provided in Section 2 of the Warrant Certificates. The Company will furnish such Transfer Agent a
copy of all notices filed with the Warrant Agent pursuant to Section 8 hereof. 
 SECTION 8. Notices to Warrant Agent. The
Company shall cause to be filed with the Warrant Agent a copy of every notice or other communication sent to the registered holders of the Warrant Certificates pursuant to the Warrant Certificates promptly upon delivery of any such notice or
communication to the registered holders of the Warrant Certificates. 
 SECTION 9. Merger, Consolidation or Change of Name of Warrant
Agent. Any corporation into which the Warrant Agent may be merged or with which it may be consolidated, or any corporation resulting from any merger or consolidation to which the Warrant Agent shall be a party, or any corporation succeeding to
all or substantially all the corporate trust or agency business of the Warrant Agent, shall be the successor to the Warrant Agent hereunder without the execution or filing of any paper or any further act on the part of any of the parties hereto,
provided that such corporation would be eligible for appointment as a successor warrant agent under the provisions of Section 11 of this Agreement. 
 SECTION 10. Warrant Agent. The Warrant Agent undertakes the duties and obligations imposed by this Agreement (and no implied duties or obligations shall be read into this 
  

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 Agreement against the Warrant Agent) upon the following terms and conditions, all of which the Company
and the holders of Warrants, by their acceptance thereof, shall be bound: 
 (a) the Warrant Agent may conclusively rely and shall be
protected in acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order, bond, note, coupon or other paper or document believed by it in good faith to be genuine and to have been signed or
presented by the proper party or parties; 
 (b) any request, direction, order or demand of the Company mentioned herein shall be
sufficiently evidenced by a certificate from the Company (unless other evidence in respect thereof be herein specifically prescribed); 
 (c) the Warrant Agent may consult with counsel of its selection, and any advice of such counsel or opinion of counsel as to matters of law shall be full and complete authorization and protection in respect of any action taken or
omitted by it hereunder in good faith and in accordance with such advice or opinion of counsel if such counsel was selected with due care; 
 (d) the Warrant Agent shall be under no obligation to exercise any of the rights or powers vested in it by this Warrant Agreement at the request, order or direction of any of the holders of Warrant Certificates pursuant to the
provisions of this Warrant Agent Agreement, unless such holders of Warrant Certificates shall have offered to the Warrant Agent security or indemnity reasonably satisfactory to it against the costs, expenses and liabilities which may be incurred
therein or thereby; 
 (e) the Warrant Agent shall not be bound to make any investigation into the facts or matters stated in any
resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture or other paper or document, but the Warrant Agent, in its reasonable discretion, may make such further inquiry or
investigation into such facts or matters as it may see fit, and, if the Warrant Agent shall determine to make such further inquiry or investigation, it shall be entitled to examine the books, records and premises of the Company, personally or by
agent or attorney; provided, however, that if the payment within a reasonable time to the Warrant Agent of the costs, expenses or liabilities likely to be incurred by it in the making of such investigation is, in the opinion of the
Warrant Agent, not reasonably assured to the Warrant Agent by the security afforded to it by the terms of this Warrant Agent Agreement, the Warrant Agent may require indemnity reasonably satisfactory to the Warrant Agent from the holders of Warrant
Certificates against such expenses or liability as a condition to so proceeding; the reasonable expenses of every such examination shall be paid by the Company or, if paid by the Warrant Agent or any predecessor Warrant Agent, shall be repaid by the
Company upon demand; 
 (f) the Warrant Agent may execute any of the powers hereunder or perform any duties hereunder either directly or
by or through agents or attorneys and the Warrant Agent shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed by it with due care hereunder; 
 (g) the Warrant Agent shall not be liable for any action taken, suffered, or omitted to be taken by it in good faith and reasonably believed by it
to be authorized or within the discretion or rights or powers conferred upon it by this Warrant Agent Agreement; 
  

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 (h) the rights, privileges, protections, immunities and benefits given to the Warrant Agent,
including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Warrant Agent in each of its capacities hereunder, and to each agent, custodian and other person employed to act hereunder; 
 (i) the Warrant Agent may request that the Company deliver a certificate of the Company setting forth the names of individuals and/or titles of
officers authorized at such time to take specified actions pursuant to this Warrant Agent Agreement, which such certificate may be signed by any person authorized to sign an such certificate, including any person specified as so authorized in any
such certificate previously delivered and not superseded; and 
 (j) the Warrant Agent shall not at any time be under any duty or
responsibility to any holder of any Warrant Certificate to make or cause to be made any adjustment of the Exercise Price or number of the Warrant Shares or other securities or property deliverable as provided in this Agreement, or to determine
whether any facts exist which may require any of such adjustments, or with respect to the nature or extent of any such adjustments, when made, or with respect to the method employed in making the same. The Warrant Agent shall not be accountable with
respect to the validity or value or the kind or amount of any Warrant Shares or of any securities or property which may at any time be issued or delivered upon the exercise of any Warrant or with respect to whether any such Warrant Shares or other
securities will when issued be validly issued and fully paid and nonassessable, and makes no representation with respect thereto. 
 SECTION 11. Change of Warrant Agent. The Warrant Agent may at any time resign as Warrant Agent upon written notice to the Company. If the Warrant Agent shall resign or become incapable of acting as Warrant Agent, the Company shall
appoint a successor to such Warrant Agent. If the Company shall fail to make such appointment within a period of thirty (30) days after it has been notified in writing of such resignation or of such incapacity by the Warrant Agent or by the
registered holder of a Warrant Certificate, then the registered holder of any Warrant Certificate or the Warrant Agent may apply, at the expense of the Company, to any court of competent jurisdiction for the appointment of a successor to the Warrant
Agent. Pending appointment of a successor to such Warrant Agent, either by the Company or by such a court, the duties of the Warrant Agent shall be carried out by the Company. The holders of a majority of the unexercised Warrants shall be entitled
at any time to remove the Warrant Agent and appoint a successor to such Warrant Agent. If a Successor Warrant Agent shall not have been appointed within thirty (30) days of such removal, the Company may appoint a successor to such Warrant
Agent. If the Company shall fail to make such appointment within a period of thirty (30) days after the expiration of the thirty (30) day period during which the holders of a majority of the unexercised Warrants could appoint a successor
Warrant Agent, then the registered holder of any Warrant Certificate or the Warrant Agent may apply, at the expense of the Company, to any court of competent jurisdiction for the appointment of a successor to the Warrant Agent. Such successor to the
Warrant Agent need not be approved by the Company or the former Warrant Agent. After appointment the successor to the Warrant Agent shall be vested with the same powers, rights, duties and responsibilities as if it had been originally named as
Warrant Agent without further act or deed; but the former Warrant Agent, upon payment of all fees and expenses due it and its agents and counsel, shall deliver and transfer to the successor to the Warrant Agent any property at the time held by it
hereunder and execute and deliver any further 
  

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assurance, conveyance, act or deed necessary for the purpose. Failure to give any notice provided for in this Section 11, however, or any defect
therein, shall not affect the legality or validity of the appointment of a successor to the Warrant Agent. 
 SECTION 12. Notices to
Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by the registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made when and if
deposited in the mail, first class or registered, postage prepaid, addressed (until another address is filed in writing by the Company with the Warrant Agent), as follows: 
  

			
	 Sipex Corporation
 233 South Hillview Drive

	
	 Milpitas, California 95035

		
	 Attention:            
	  	 Ray Wallin
 Chief Financial Officer and Senior Vice
President, Finance

 In case the Company shall fail to maintain such office or agency or shall fail to give such notice
of the location or of any change in the location thereof, presentations may be made and notices and demands may be served at the principal corporate trust office of the Warrant Agent. 
 Any notice pursuant to this Agreement to be given by the Company or by the registered holder(s) of any Warrant Certificate to the Warrant Agent shall be
sufficiently given when and if deposited in the mail, first-class or registered, postage prepaid, addressed (until another address is filed in writing by the Warrant Agent with the Company) to the Warrant Agent as follows: 
 Well Fargo Bank, National Association 
 707 Wilshire Blvd., 17th Floor 
 Los Angeles, CA 90017 
 Attention: Corporate Trust Services 
 Fax: (213) 614-3355 
 SECTION 13. Supplements and Amendments. The Company and the Warrant Agent may from time to
time supplement or amend this Agreement without the approval of any holders of Warrant Certificates in order to cure any ambiguity or to correct or supplement any provision contained herein which may be defective or inconsistent with any other
provision herein, or to make any other provisions in regard to matters or questions arising hereunder which the Company and the Warrant Agent may deem necessary or desirable and which shall not in any way adversely affect the interests of the
holders of Warrant Certificates. Upon the delivery of a certificate from an appropriate officer of the Company which states that the proposed supplement or amendment is in compliance with the terms of this Section 13, the Warrant Agent shall
execute such supplement or amendment. Notwithstanding anything in this Agreement to the contrary, the prior written consent of the Warrant Agent must be obtained in connection with any 

  

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supplement or amendment which alters the rights or duties of the Warrant Agent. The Company and the Warrant Agent may amend any provision herein with the
consent of the holders of a majority of the unexercised Warrants. 
 SECTION 14. Successors. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Warrant Agent shall bind and inure to the benefit of their respective successors and assigns hereunder. 
 SECTION 15. Termination. This Agreement will terminate on any earlier date if all Warrants have been exercised or expired without exercise. The provisions of Section 10 hereof shall survive such
termination. 
 SECTION 16. Governing Law and Jurisdiction. This Agreement and each Warrant Certificate issued hereunder shall be
deemed to be a contract made under the laws of the State of New York and for all purposes shall be construed in accordance with the internal laws of the State of New York without giving effect to any choice of law or conflict of law provision or
rule (whether of the State of New York or any other jurisdictions) that would cause the application of the laws of any jurisdictions other than the State of New York. Each party hereby irrevocably submits to the non-exclusive jurisdiction of the
state and federal courts sitting in the City of New York, Borough of Manhattan, 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 HEREWITH
OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY. 
 SECTION 17. Benefits of This Agreement. Nothing in this
Agreement shall be construed to give to any person or corporation other than the Company, the Warrant Agent and the registered holders of the Warrant Certificates any legal or equitable right, remedy or claim under this Agreement, and this Agreement
shall be for the sole and exclusive benefit of the Company, the Warrant Agent and the registered holders of the Warrant Certificates. 
 SECTION 18. Counterparts. This Agreement may be executed in any number of counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and
the same instrument. 
  

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 SECTION 19. Conflicting Terms. In the event of any inconsistency or conflict between the Warrants
and this Agreement, the terms, conditions and provisions of the Warrants shall govern and control. 
 IN WITNESS WHEREOF, the parties hereto
have caused this Agreement to be duly executed, as of the day and year first above written. 
 SIPEX CORPORATION 
  

			
	By:	 	 /s/ Clyde R. Wallin

	Name:	 	Clyde R. Wallin
	Title:	 	Chief Financial Officer and Secretary

 WELLS FARGO BANK, NATIONAL ASSOCIATION, 
 as Warrant Agent 
  

			
	By:	 	 /s/ Maddy Hall

	Name:	 	Maddy Hall
	Title:	 	Assistant Vice President

  

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 EXHIBIT A TO WARRANT AGENT AGREEMENT 
 FORM OF WARRANT 
 [THE FOLLOWING PARAGRAPH SHALL APPEAR ON THE FACE OF EACH RESTRICTED WARRANT:]

 THE SECURITIES REPRESENTED BY THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED OR APPLICABLE STATE SECURITIES LAWS. THE
SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED OR APPLICABLE STATE SECURITIES LAWS OR PURSUANT TO AN
APPLICABLE EXEMPTION FROM THE SECURITIES ACT OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY THE SECURITIES. 
 [THE COMPANY MAY PLACE THE FOLLOWING PARAGRAPH ON THE FACE OF EACH WARRANT HELD BY OR TRANSFERRED TO AN “AFFILIATE” (AS DEFINED IN RULE 501(B) OF
REGULATION D UNDER THE SECURITIES ACT) OF THE COMPANY:] 
  

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 THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE HELD BY A PERSON WHO MAY BE DEEMED TO BE AN AFFILIATE OF THE ISSUER
FOR PURPOSES OF RULE 144 PROMULGATED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY BE SOLD ONLY IN COMPLIANCE WITH RULE 144 OR PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
ACT. 
 SIPEX CORPORATION 
 WARRANT
TO PURCHASE COMMON STOCK 
 Warrant No.: [            ] Number of Shares:
[            ] 
 CUSIP No.:
[            ] (subject to adjustment) 
 Date of
Issuance:         May , 2006 
 Sipex Corporation, a Delaware corporation (the
“Company”), hereby certifies that, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged,        , the registered holder hereof or its
permitted assigns is entitled, subject to the terms and conditions set forth below, to purchase from the Company upon surrender of this Warrant (as defined below), at any time or times on or after the date hereof, but not after 5:00 p.m., Eastern
Standard Time, on the Expiration Date (as defined below),         fully paid nonassessable shares of Common Stock (as defined below) of the Company at the Exercise Price per share provided in
Section 1(c) of this Warrant, subject to adjustment as provided below. Capitalized terms used herein but not defined shall have the same meanings assigned to them in the Securities Purchase Agreement dated as of May 16, 2006, by and
between the Company and the parties listed on the Schedule of Buyers attached thereto as Exhibit A (as such agreement may be amended, supplemented and modified from time to time as provided in such agreement, the “Securities Purchase
Agreement”). 
 This Warrant (as defined below) is one of a series of Warrants issued in connection with the transactions described in
(i) the Securities Purchase Agreement and (ii) certain other related documents and agreements including, without limitation, the Transaction Documents (as defined in the Securities Purchase Agreement). The Warrant Shares (as defined below)
issued upon exercise of this Warrant and the holder hereof and thereof shall be entitled to all of the rights and privileges set forth in the Transaction Documents. The Warrants are issued under and pursuant to a Warrant Agent Agreement dated as of
May 16, 2006 (herein called the “Warrant Agent Agreement”), between the Company and Wells Fargo Bank, National Association (herein called the “Warrant Agent”). 
 Section 1. Definitions. The following terms as used in this Warrant shall have the following meanings: 
 (a) “Bloomberg” means Bloomberg Financial Markets. 
 (b) “Business Day” means any day other than
Saturday, Sunday or other day on which commercial banks in the City of New York are required by law or executive order to remain closed. 
  

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 (c) “Common Stock” means (i) the common stock, $0.01 par value per share, of the
Company, and (ii) any capital stock into which such Common Stock shall have been changed or any capital stock resulting from a reclassification of such Common Stock. 
 (e) “Exercise Price” shall be equal to $3.216, subject to further adjustment as hereinafter provided. 
 (f) “Expiration Date” means May 16, 2011, or, if such date does not fall on a Trading Day, then the next Trading Day. 
 (g) “Person” means an individual, a limited liability company, a partnership, a joint venture, a corporation, a joint stock company, a trust, an unincorporated organization or association and a
government or any department or agency thereof. 
 (h) “Principal Market” shall have the meaning ascribed thereto in the
Securities Purchase Agreement. 
 (i) “Registration Rights Agreement” means that certain Registration Rights Agreement, dated
as of May 16, 2006, among the Company and the initial purchasers of the Notes and the Warrants as such agreement may be amended, supplemented and modified from time to time in a writing signed by all of the signatories thereto. 
 (j) “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 
 (k) “Successor Entity” means the Person formed by, resulting from or surviving any Fundamental Transaction or the Person with which such
Fundamental Transaction shall have been entered into. 
 (l) “Trading Day” shall mean (x) a day on which the Principal
Market is open for business or (y) if the applicable security is not so listed on a Principal Market or admitted for trading or quotation, a Business Day. 
 (m) “Warrant” means this Warrant and the other warrants to purchase shares of Common Stock issued pursuant to the Securities Purchase Agreement and all warrants issued in exchange, transfer or
replacement thereof. 
 (n) “Warrant Shares” means all shares of Common Stock issuable upon exercise of the Warrants.

 Section 2. Exercise of Warrant. 
 (a) Subject to the terms and conditions hereof, including the early termination of this Warrant pursuant to Section 3(b) of this Warrant, this Warrant may be exercised by the holder hereof then registered on the books of the
Company, in whole or in part, at any time on any Business Day on or after the opening of business on the date hereof and prior to 5:00 p.m., Eastern Time, on the Expiration Date by (i) delivery of a written notice, in the form of the
subscription notice attached as Exhibit A hereto or a reasonable facsimile thereof (the “Exercise Notice”), to the Company at the principal corporate trust office of the Warrant Agent and to the Company’s designated transfer
agent (the “Transfer Agent”), of such holder’s election to 
  

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exercise all or a portion of this Warrant, which notice shall specify the number of Warrant Shares to be purchased, (ii) (A) payment to the Warrant
Agent of an amount equal to the Exercise Price multiplied by the number of Warrant Shares as to which this Warrant is being exercised (the “Aggregate Exercise Price”) in cash or delivery of a certified check or bank draft payable to the
order of the Warrant Agent or wire transfer of immediately available funds or (B) notification to the Company at the principal corporate trust office of the Warrant Agent and to the Transfer Agent that this Warrant is being exercised pursuant
to a Cashless Exercise (as defined in Section 2(e) of this Warrant), and (iii) the surrender of this Warrant to a common carrier for overnight delivery to the Warrant Agent as soon as practicable following such date (or an indemnification
undertaking or other form of security reasonably satisfactory to the Company with respect to this Warrant in the case of its loss, theft or destruction, or an affidavit of lost Warrant, in accordance with Section 11); provided, however, that if
such Warrant Shares are to be issued in any name other than that of the registered holder of this Warrant, such issuance shall be deemed a transfer and the provisions of Section 8 of this Warrant shall be applicable. In the event of any
exercise of the rights represented by this Warrant in compliance with this Section 2(a), the Company shall, as soon as practicable, but in no event later than the third Business Day (the “Warrant Share Delivery Date”) following the
date of receipt by the Warrant Agent of the Exercise Notice, the Aggregate Exercise Price (or notice of Cashless Exercise) and this Warrant (or an indemnification undertaking or other form of security reasonably satisfactory to the Company with
respect to this Warrant in the case of its loss, theft or destruction, or an affidavit of lost Warrant, in accordance with Section 11) (the “Exercise Delivery Documents”), (A) in the case of a public resale of such Warrant
Shares, at the holder’s request, to credit such aggregate number of shares of Common Stock to which the holder shall be entitled to the holder’s or its designee’s balance account with The Depository Trust Company (“DTC”)
through its Deposit Withdrawal At Custodian system to the extent then eligible to be deposited with DTC under the rules of such depositary or (B) to issue and deliver to the address as specified in the Exercise Notice, a certificate or
certificates in such denominations as may be requested by the holder in the Exercise Notice, registered in the name of the holder or its designee, for the number of shares of Common Stock to which the holder shall be entitled upon such exercise.
Upon delivery of the Exercise Delivery Documents, the holder of this Warrant shall be deemed for all corporate purposes to have become the holder of record of the Warrant Shares with respect to which this Warrant has been exercised, irrespective of
the date of delivery of this Warrant as required by clause (iii) above or the certificates evidencing such Warrant Shares. In the case of a dispute as to the determination of the Exercise Price or the arithmetic calculation of the number of
Warrant Shares, the Company shall promptly issue to the holder the number of shares of Common Stock that is not disputed and shall submit the disputed determination or arithmetic calculation to the holder via facsimile within two (2) Business
Days after receipt of the holder’s Exercise Notice. If the holder and the Company are unable to agree upon the determination of the Exercise Price or arithmetic calculation of the number of Warrant Shares within two (2) Business Days of
such disputed determination or arithmetic calculation being submitted to the holder, then the Company shall immediately submit via facsimile (i) the disputed determination of the Exercise Price or the Average Price (as defined in
Section 9(f) of this Warrant) to an independent, reputable investment banking firm selected jointly by the Company and the holder or (ii) the disputed arithmetic calculation of the number of Warrant Shares to its independent, outside
auditor. The Company shall cause the investment banking firm to perform the determination or calculation and notify the Company and the holder of the results no later 
  

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than ten (10) Business Days from the time it receives the disputed determination or calculation. Such investment banking firm’s calculation shall
be deemed conclusive absent demonstrable error. All fees and expenses of such determinations shall be borne solely by the Company. 
 (b) Unless the rights represented by this Warrant shall have expired or shall have been fully exercised, the Company shall, as soon as practicable but in no event later than five (5) Business Days after any exercise (the
“Warrant Delivery Date”) and at its own expense, issue a new Warrant identical in all respects to this Warrant exercised except it shall represent rights to purchase the number of Warrant Shares purchasable immediately prior to such
exercise under this Warrant, less the number of Warrant Shares with respect to which this Warrant is exercised. 
 (c) Notwithstanding
anything contained in this Warrant to the contrary, the Company shall not be required to issue fractions of shares of Common Stock upon exercise of this Warrant or to distribute certificates which evidence such fractional shares. If more than one
Warrant shall be presented for exercise in full at the same time by the same holder, the number of full shares of Common Stock which shall be issuable upon the exercise thereof shall be computed on the basis of the aggregate number of shares of
Common Stock purchasable on exercise of all Warrants so presented. In lieu of any fractional shares, there shall be paid to the holder an amount of cash equal to the same fraction of the current market value of a share of Common Stock. For purposes
of this Section 2(c) of this Warrant, the current market value of a share of Common Stock shall be the Average Price of a share of Common Stock for the Trading Day immediately prior to the date of such exercise or if not listed on a
Principal Market, then as determined in good faith by a majority of the Company’s Board of Directors, whose determination shall be final, binding and conclusive. 
 (d) If the Company shall fail for any reason or for no reason (except in the case of a dispute as to the Exercise Price or the Average Price which is being resolved in accordance with Section 2(a) of this
Warrant) to issue to the holder within three (3) Business Days of receipt of the Exercise Delivery Documents, a certificate for the number of shares of Common Stock to which the holder is entitled or to credit the holder’s or its
designee’s balance account with DTC, in accordance with Section 2 of this Warrant, for such number of shares of Common Stock to which the holder is entitled upon the holder’s exercise of this Warrant or a new Warrant for the number of
shares of Common Stock to which such holder is entitled pursuant to Section 2(b) of this Warrant, the Company shall, in addition to any other remedies under this Warrant or the Securities Purchase Agreement or otherwise available to such
holder, including any indemnification under Section 8 of the Securities Purchase Agreement, pay as additional damages in cash to such holder on each day after the Warrant Share Delivery Date if such exercise is not timely effected and/or each
day after the Warrant Delivery Date if such Warrant is not delivered, as the case may be, an amount equal to two percent (2.0%) per month multiplied by the product of (I) the sum of the number of shares of Common Stock not issued to the
holder on or prior to the Warrant Share Delivery Date and to which such holder is entitled and, in the event the Company has failed to deliver a Warrant to the holder on or prior to the Warrant Delivery Date and to which such holder is entitled, the
number of shares of Common Stock issuable upon exercise of the Warrant as of the Warrant Delivery Date and (II) the Closing Price of the Common Stock on the Warrant Share Delivery Date, in the case of failure to deliver Common Stock, or on the
Warrant Delivery Date, in the case of failure to deliver a Warrant, provided that if the Common Stock is not listed on a Principal Market, then the Closing Price shall be as determined in good faith by a majority of the Company’s Board of
Directors. 
  

 13 

 (e) Notwithstanding anything contained herein to the contrary, the holder of this Warrant may, at
its election exercised in its sole discretion, exercise this Warrant as to all or a portion of the Warrant Shares and, in lieu of making the cash payment otherwise contemplated to be made to the Company upon such exercise in payment of the Aggregate
Exercise Price, elect instead to receive upon such exercise the “Net Number” of shares of Common Stock determined according to the following formula (a “Cashless Exercise”): 
 Net Number = (A x B) — (A x C) 
                           B 
 For purposes of the foregoing formula: 
 A= the total number of shares with respect to which this Warrant is
then being exercised. 
 B= the Current Market Price of the Common Stock on the Trading Day immediately preceding the date of the Exercise
Notice. 
 C= the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise. 
 (f) [INCLUDE THE FOLLOWING PARAGRAPH ONLY IF HOLDER HAS ELECTED TO BE GOVERNED BY SECTION 2(k)(A) OF THE SECURITIES PURCHASE AGREEMENT:] 

The Company shall not effect the exercise of this Warrant, and the Holder shall not have the right to exercise this Warrant, to the extent that after
giving effect to such exercise (x) the number of shares of Common Stock beneficially owned by such holder (together with such holder’s affiliates) (other than the shares which would otherwise be deemed beneficially owned except for being
subject to a limitation on exercise analogous to the limitation contained in this Section 2(f)) plus (y) the number of shares of Common Stock issuable upon the exercise of such Warrants would be equal to or exceed 9.99% of the number of
shares of Common Stock then issued and outstanding (after giving effect to such exercise), it being the intent of the Company and the holder that the holder not be deemed at any time to have the power to vote or dispose of greater than 9.99% of the
number of shares of Common Stock issued and outstanding. As used herein, beneficial ownership shall be determined in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated
thereunder. To the extent that the limitation contained in this Section 2(f) applies (and without limiting any rights the Company may otherwise have), the Company may rely on the holder’s determination of whether the Warrants are
exercisable pursuant to the terms hereof, the Company having no obligation whatsoever to verify or confirm the accuracy of such determination, and the submission of the Exercise Notice by the holder shall be deemed to be the holder’s
representation that the Warrants specified therein are exercisable pursuant to the terms hereof. Nothing contained herein shall be deemed to restrict the right of a holder to exercise the Warrants at such time as the exercise thereof will not
violate the provisions of this Section 2(f). By written notice to the Company, the holder may increase or decrease the maximum percentage stated in this Section 2(f) to any other percentage specified in such notice; provided, that any

  

 14 

 
such increase will not be effective until the sixty first (61st) day after such notice is delivered to the Company and provided further that in no event
shall the percentage stated in this Section 2(f) exceed 9.99%. Nothing contained herein shall be deemed to restrict the right of a holder to exercise the Warrants at such time as the exercise thereof will not violate the provisions of this
Section 2(f).] 
 [INCLUDE THE FOLLOWING PARAGRAPH ONLY IF HOLDER HAS ELECTED TO BE GOVERNED BY SECTION 2(k)(B) OF THE SECURITIES PURCHASE AGREEMENT:]

 The Company shall not effect the exercise of this Warrant, and the Holder shall not have the right to exercise this Warrant, to the extent
that after giving effect to such exercise (x) the number of shares of Common Stock beneficially owned by such holder (together with such holder’s affiliates) (other than the shares which would otherwise be deemed beneficially owned except
for being subject to a limitation on exercise analogous to the limitation contained in this Section 2(f)) plus (y) the number of shares of Common Stock issuable upon the exercise of such Warrants would be equal to or exceed 4.99% of the
number of shares of Common Stock then issued and outstanding (after giving effect to such exercise), it being the intent of the Company and the holder that the holder not be deemed at any time to have the power to vote or dispose of greater than
4.99% of the number of shares of Common Stock issued and outstanding. As used herein, beneficial ownership shall be determined in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended, and the rules and regulations
promulgated thereunder. To the extent that the limitation contained in this Section 2(f) applies (and without limiting any rights the Company may otherwise have), the Company may rely on the holder’s determination of whether the Warrants
are exercisable pursuant to the terms hereof, the Company having no obligation whatsoever to verify or confirm the accuracy of such determination, and the submission of the Exercise Notice by the holder shall be deemed to be the holder’s
representation that the Warrants specified therein are exercisable pursuant to the terms hereof. Nothing contained herein shall be deemed to restrict the right of a holder to exercise the Warrants at such time as the exercise thereof will not
violate the provisions of this Section 2(f). By written notice to the Company, the holder may increase or decrease the maximum percentage stated in this Section 2(f) to any other percentage specified in such notice; provided, that any such
increase will not be effective until the sixty first (61st) day after such notice is delivered to the Company and provided further that in no event shall the percentage stated in this Section 2(f) exceed 4.99%. Nothing contained herein
shall be deemed to restrict the right of a holder to exercise the Warrants at such time as the exercise thereof will not violate the provisions of this Section 2(f).] 
 Section 3. Date; Duration; Early Termination of Warrants. 
 (a) The date of this Warrant is
May 16, 2006 (the “Warrant Date”). This Warrant, in all events, shall be wholly void and of no effect at 5:00 pm, Eastern Standard Time, on the Expiration Date or the Termination Date (as defined below), if applicable, as the case may
be, except that notwithstanding any other provisions hereof, the provisions of Section 8(c) of this Warrant shall continue in full force and effect after such date as to any Warrant Shares or other securities issued upon the exercise of
this Warrant. The Company shall give written notice of the Expiration Date not less than 90 days nor more than 120 days prior to the Expiration Date to each of the registered holders of the Warrants at its address appearing on the Warrant
Register. If on the Expiration Date the Average Price is greater than the Exercise Price then in effect, any unexercised Warrant shall be deemed exercised by the holder of such Warrant pursuant to a Cashless Exercise in accordance with
Section 2(e). 
  

 15 

 (b) At any time after May 16, 2009 the Company may, at its option, terminate the Warrants if
the following conditions are met: (1) the Closing Price per share of the Common Stock has exceeded two hundred (200%) of the Conversion Price then in effect for at least twenty (20) Trading Days within a period of thirty
(30) consecutive Trading Days (the “Determination Period”), (2) the average daily volume shall be not less than $375,000 during such period and (3) either (x) a shelf registration statement covering resales of the
Common Stock issuable upon exercise of the Warrants is effective and the Company reasonably expects such registration statement to remain available for use at all times during the period beginning thirty (30) days prior to the Notice Date (as
defined below) and ending on the Termination Date, and the Company reasonably expects such registration statement to remain effective and available for use until at least the earlier of thirty (30) days following the Termination Date or the
last date on which the shelf registration statement is required to be kept effective under the terms of the Registration Rights Agreement or (y) the Warrant Shares may be sold pursuant to Rule 144(k) under the Securities Act. By following the
procedures set forth below, the Company may exercise this right of termination only if, within five (5) days following the Determination Period, the Company shall mail or cause to be mailed a notice of such termination (the “Termination
Notice,” and the date such Termination Notice is mailed, the “Notice Date”) to the holder of the Warrant at the address set forth for such holder in Section 12 of this Warrant. Such notice shall be irrevocable. The Company shall
mail the Termination Notice by first class mail and contemporaneously issue a press release through PRNewswire or Bloomberg containing substantially the same information as the Termination Notice described below. Each Termination Notice shall
specify the CUSIP number of the Warrant, the Termination Date, that the Warrants may not be exercised after 5:00 p.m., Eastern Standard Time, on the Termination Date and the current Exercise Price. 
 If all of the conditions described in the preceding paragraph have been met, and if no Event of Default (as that term is defined in the Indenture) shall
have occurred and be continuing under the Indenture, dated as of May 16, 2006, between the Company and Wells Fargo Bank, National Association, as trustee, any Warrant not exercised before the close of business on the ninetieth (90th) day
after the mailing date of the Termination Notice (such ninetieth (90th) day, the “Termination Date”) shall automatically be deemed exercised in a Cashless Exercise in accordance with Section 2(e), and the Company will deliver the
number of Warrant Shares to the holder upon receipt of a completed Exercise Notice along with the original copy of the Warrant for cancellation (or an indemnification undertaking or other form of security reasonably satisfactory to the Company with
respect to this Warrant in the case of its loss, theft or destruction, or an affidavit of lost Warrant, in accordance with Section 11). 
 Section 4. Covenants as to Common Stock. The Company hereby covenants and agrees as follows: 
 (a) Issuance of
Warrants and Warrant Shares. This Warrant is, and any Warrants issued in substitution for or replacement of this Warrant will, upon issuance, be, validly issued, fully paid and non-assessable and free from all taxes, liens and charges with
respect to the issuance thereof, and shall not be subject to preemptive rights or other similar rights of shareholders of the Company. All Warrant Shares which may be issued upon the exercise of the rights represented 
  

 16 

 
by this Warrant will, upon issuance and payment hereof or Cashless Exercise in accordance with the terms hereof, be validly issued, fully paid and
nonassessable and free from all taxes, liens and charges created by or through the Company with respect to the issue thereof, with the holders being entitled to all rights accorded to a holder of Common Stock. 
 (b) Reservation of Shares. During the period within which the rights represented by this Warrant may be exercised, the Company will take all
actions reasonably necessary to at all times have authorized, and reserved for the purpose of issuance, no less than one hundred ten percent (110%) of the number of shares of Common Stock needed to provide for the issuance of the Warrant Shares
upon exercise of all of the Warrants without regard to any limitations on conversions or exercise. 
 (c) Listing. Upon the
filing of a registration statement pursuant to the terms of the Registration Rights Agreement, the Company shall use its reasonable best efforts to promptly secure the listing of the shares of Common Stock issuable upon exercise of this Warrant upon
each national securities exchange and automated quotation system, if any, upon which shares of Common Stock are then listed (subject to official notice of issuance upon exercise of this Warrant) no later than December 31, 2006, and shall use
its reasonable best efforts to maintain, so long as any other shares of Common Stock shall be so listed, such listing of all shares of Common Stock issuable from time to time upon the exercise of this Warrant; and the Company shall use its
reasonable best efforts to list on each national securities exchange or automated quotation system, as the case may be, and shall maintain such listing of, any other shares of capital stock of the Company issuable upon the exercise of this Warrant
if and so long as any shares of the same class shall be listed on such national securities exchange or automated quotation system. The Company shall pay all fees and expenses in connection with satisfying its obligations under this
Section 4(c). 
 (d) Certain Actions. The Company (i) will not increase the par value of any shares of Common Stock
issuable upon the exercise of this Warrant above the Exercise Price then in effect, (ii) will take all such actions as may be reasonably necessary or appropriate in order that the Company may validly and legally issue fully paid and
nonassessable shares of Common Stock upon the exercise of this Warrant and (iii) will not take any action which results in any adjustment of the Exercise Price if the total number of shares of Common Stock issuable after the action upon the
exercise of all of the Warrants would exceed the total number of shares of Common Stock then authorized by the Company’s Articles of Incorporation and available for the purpose of issue upon such exercise. 
 (e) Obligations Binding on Successors. This Warrant will be binding upon any entity succeeding to the Company in one or a series of
transactions by merger, consolidation or acquisition of all or substantially all of the Company’s assets or other similar transactions. 
 Section 5. Taxes. 
 (a) The Company shall pay any and all documentary, stamp, transfer and other similar taxes
which may be payable with respect to the issuance and delivery of Warrant Shares upon exercise of this Warrant. 
  

 17 

 (b) Notwithstanding any other provision of this Warrant or any other Transaction Document, for
income tax purposes, any assignee or transferee shall agree that the Company and the Company’s Transfer Agent shall be permitted to withhold from any amounts payable to such assignee or transferee any taxes required by law to be withheld from
such amounts. Unless exempt from the obligation to do so, each assignee or transferee shall execute and deliver to the Company or the Transfer Agent, as applicable, a properly completed Form W-8 or W-9, indicating that such assignee or transferee is
not subject to back-up withholding for United States Federal income tax purposes. Each assignee or transferee that does not deliver such a form pursuant to the preceding sentence shall have the burden of proving to the Company’s reasonable
satisfaction that it is exempt from such requirement. 
 Section 6. Warrant Holder Not Deemed a Shareholder. Except as otherwise specifically
provided herein, prior to the exercise of the Warrants represented hereby, the holder of this Warrant shall not be entitled, as such, to any rights of a shareholder of the Company, including, without limitation, the right to vote or to consent to
any action of the shareholders of the Company, to receive dividends or other distributions, to exercise any preemptive right or to receive dividends or other distributions, to exercise any preemptive right or to receive any notice of meetings of
shareholders of the Company, and shall not be entitled to receive any notice of any proceedings of the Company. In addition, nothing contained in this Warrant shall be construed as imposing any liabilities on such holder to purchase any securities
(upon exercise of this Warrant or otherwise) or as a shareholder of the Company, whether such liabilities are asserted by the Company or by creditors of the Company. 
 Section 7. Compliance with Securities Laws. 
 (a) The holder of this Warrant, by the
acceptance hereof, represents and warrants that (i) it is acquiring this Warrant and (ii) upon exercise of this Warrant will acquire the Warrant Shares then issuable upon exercise thereof for its own account and not with a view towards, or
for resale in connection with, the public sale or distribution thereof, except pursuant to sales registered or exempted from registration under the Securities Act; provided, however, that by making the representations herein, the holder does not
agree to hold this Warrant or any of the Warrant Shares for any minimum or other specific term and reserves the right to dispose of this Warrant and the Warrant Shares at any time in accordance with or pursuant to a registration statement or an
exemption under the Securities Act. The holder of this Warrant further represents, by acceptance hereof, that, as of this date, such holder is an “accredited investor” as such term is defined in Rule 501(a) of Regulation D
promulgated by the Securities and Exchange Commission under the Securities Act and a “qualified institutional buyer” as such term is defined in Rule 144A promulgated by the Securities and Exchange Commission under the Securities Act
and was not organized for the specific purpose of acquiring the Warrants or Warrant Shares. 
 (b) This Warrant and all the Warrant
Shares issued upon exercise hereof shall be stamped or imprinted with a legend in substantially the following form (in addition to any legend required by state securities laws or any securities exchange upon which such Warrant Shares may, at the
time of such exercise, be listed) on the face thereof unless at the time of exercise such Warrant Shares shall be registered under the Securities Act: 
 THE SECURITIES REPRESENTED BY THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE 
  

 18 

 “SECURITIES ACT”), OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR
SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OR APPLICABLE STATE SECURITIES LAWS OR PURSUANT TO AN EXEMPTION FROM THE SECURITIES ACT OR APPLICABLE STATE
SECURITIES LAWS. THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY THE SECURITIES. 
 In
addition, any Warrants or Warrant Shares held by or transferred to an “affiliate” (as defined in Rule 501(b) of Regulation D under the Securities Act) of the Company may be stamped or imprinted with a legend substantially in
the following form: 
 THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE HELD BY A PERSON WHO MAY BE DEEMED TO BE AN AFFILIATE OF THE ISSUER
FOR PURPOSES OF RULE 144 PROMULGATED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY BE SOLD ONLY IN COMPLIANCE WITH RULE 144 OR PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
ACT. 
 The legends set forth above shall be removed and the Company shall direct the Warrant Agent (in the case of Warrants) to issue a new Warrant or
Warrant(s) of like tenor and exercisable for the same number of Warrant Shares, or the Transfer Agent (in the case of Warrant Shares) to issue a certificate or certificates representing Warrant Shares, as appropriate, without such legends to the
holder of the Warrant(s) or Warrant Shares upon which they are stamped, (i) if such Warrant(s) or Warrant Shares are registered for resale under the Securities Act, (ii) if, pursuant to a sale transaction, such holder provides the Company
with an opinion of counsel reasonably acceptable to the Company to the effect that a sale, assignment or transfer of the Warrant(s) or Warrant Shares may be made without registration under the Securities Act, or (iii) if the holder of the
Securities has not been an “affiliate” (as defined in Rule 501(b) of Regulation D under the Securities Act) during the preceding three (3) months, upon expiration of the two- (2) year period under Rule 144(k)
promulgated under the Securities Act (or any successor rule). In the event Rule 144(k) (or any successor rule) is amended to change the two- (2) year or three- (3) month periods, the reference(s) in the preceding sentence shall be
deemed to be a reference to such changed period(s), provided that such change shall not become effective if it is otherwise prohibited by, or would otherwise cause a violation of, the then applicable federal securities laws. The Company shall not
require an opinion of counsel for the sale of Warrant(s) or Warrant Shares in accordance with Rule 144 of the Securities Act, provided the seller provides such representations that the Company shall reasonably request confirming compliance with the
requirements of Rule 144. 
 Section 8. Ownership and Transfer. 
 (a) The Company shall cause the Warrant Agent to maintain at its principal corporate trust office (or such office or agency of the Company as the
Company may designate by notice to the holder hereof), a register for this Warrant (the “Warrant Register”), in which the Warrant Agent shall record the name and address of the Person in whose name this Warrant has been issued, as well as
the name and address of each transferee. The Company may treat the Person in whose 

  

 19 

 
name any Warrant is registered on the Warrant Register as the owner and holder thereof for all purposes, notwithstanding any notice to the contrary, but in
all events recognizing any transfers made in accordance with the terms of this Warrant. 
 (b) This Warrant and all rights hereunder
shall be assignable and transferable by the holder hereof without the consent of the Company upon surrender of this Warrant with a properly executed assignment (in the form of Exhibit B attached hereto) at the principal corporate trust office
of the Warrant Agent (or such office or agency of the Company as the Company may designate in writing to the holder hereof). 
 (c) The
Company is obligated to register the Warrants and the Warrant Shares for resale under the Securities Act pursuant to the Registration Rights Agreement. The Warrants and the Warrant Shares shall constitute Registrable Securities (as such term is
defined in the Registration Rights Agreement). Each holder of this Warrant shall be entitled to all of the benefits afforded to a holder of any such Registrable Securities under the Registration Rights Agreement and such holder, by its acceptance of
this Warrant, agrees and shall agree to be bound by and to comply with the terms and conditions of the Registration Rights Agreement applicable to such holder as a holder of such Registrable Securities. 
 Section 9. Adjustment of Exercise Price and Number of Shares Issuable. The Exercise Price and the number of Warrant Shares issuable upon the exercise of each
Warrant are subject to adjustment from time to time upon the occurrence of the events enumerated in this Section 9. 
 (a) In case
the Company shall hereafter pay a dividend in shares of Common Stock, or make a distribution of shares of Common Stock, to all holders of the outstanding Common Stock, the Exercise Price in effect at the opening of business on the date following the
date fixed for the determination of shareholders entitled to receive such dividend or other distribution shall be reduced by multiplying such Exercise Price by a fraction of which (i) the numerator shall be the number of shares of Common Stock
outstanding at the close of business on the Record Date (as defined in Section 9(f) of this Warrant) fixed for such determination and (ii) the denominator shall be the sum of such number of shares and the total number of shares
constituting such dividend or other distribution, such reduction in the Exercise Price to become effective immediately after the opening of business on the day following the Record Date. If any dividend or distribution of the type described in this
Section 9(a) of this Warrant is declared but not so paid or made, the Exercise Price shall again be adjusted to the Exercise Price which would then be in effect if such dividend or distribution had not been declared. 
 (b) In case the outstanding shares of Common Stock shall be subdivided into a greater number of shares of Common Stock, the Exercise Price in effect
at the opening of business on the day following the day upon which such subdivision becomes effective shall be proportionately reduced, and conversely, in case outstanding shares of Common Stock shall be combined into a smaller number of shares of
Common Stock, the Exercise Price in effect at the opening of business on the day following the day upon which such combination becomes effective shall be proportionately increased, such reduction or increase, as the case may be, to become effective
immediately after the opening of business on the day following the day upon which such subdivision or combination becomes effective. 
  

 20 

 (c) In case the Company shall issue rights or warrants to all holders of its outstanding shares of
Common Stock entitling them to subscribe for or purchase shares of Common Stock at a price per share less than the Current Market Price (as defined in Section 9(f) of this Warrant) on the Record Date fixed for the determination of shareholders
entitled to receive such rights or warrants, the Exercise Price shall be adjusted so that the same shall equal the price determined by multiplying the Exercise Price in effect at the opening of business on the date after such Record Date by a
fraction (i) the numerator of which shall be the sum of the number of shares of Common Stock outstanding at the close of business on the Record Date plus the number of shares that the aggregate offering price of the total number of shares so
offered for subscription or purchase would purchase at such Current Market Price and (ii) the denominator of which shall be the sum of the number of shares of Common Stock outstanding at the close of business on the Record Date plus the total
number of additional shares of Common Stock so offered for subscription or purchase. Such adjustment shall become effective immediately after the opening of business on the Business Day following the Record Date fixed for determination of
shareholders entitled to receive such rights or warrants. To the extent that shares of Common Stock are not delivered pursuant to such rights or warrants, upon the expiration or termination of such rights or warrants, the Exercise Price shall be
readjusted to the Exercise Price that would then be in effect had the adjustments made upon the issuance of such rights or warrants been made on the basis of delivery of only the number of shares of Common Stock actually delivered. In the event that
such rights or warrants are not so issued, the Exercise Price shall again be adjusted to be the Exercise Price that would then be in effect if the Record Date for the determination of shareholders entitled to receive such rights or warrants had not
been fixed. In determining whether any rights or warrants entitle the holders to subscribe for or purchase shares of Common Stock at less than the Current Market Price, and in determining the aggregate offering price of such shares of Common Stock,
there shall be taken into account any consideration received for such rights or warrants, the value of such consideration, if other than cash, to be determined in good faith by the Company’s Board of Directors. 
 (d) In case the Company shall, by dividend or otherwise, distribute to all holders of its Common Stock shares of any class of capital stock of the
Company (other than any dividends or distributions to which Section 9(a) of this Warrant applies) or evidences of its indebtedness or other assets (including securities, but excluding (1) any rights or warrants referred to in
Section 9(c) of this Warrant and (2) dividends and distributions paid exclusively in cash (except as set forth in Sections 9(e) and 9(f) of this Warrant (the foregoing hereinafter in this Section 9(d) called the
“Securities”)), unless the Company elects to reserve such Securities for distribution to the holders upon exercise of the Warrants so that any such holder converting Warrants will receive upon such exercise, in addition to the shares of
Common Stock to which such holder is entitled, the amount and kind of such Securities which such holder would have received if such holder had exercised its Warrants into Common Stock immediately prior to the Record Date for such distribution of the
Securities, then, in each such case, the Exercise Price shall be reduced so that the same shall be equal to the price determined by multiplying the Exercise Price in effect immediately prior to the close of business on the Record Date with respect
to such distribution by a fraction (i) the numerator of which shall be the Current Market Price (as defined in Section 9(f) of this Warrant) on such date less the fair market value (as determined in good faith by the Company’s Board
of Directors, whose determination shall be conclusive) on such date of the portion of the Securities so distributed applicable to one share of Common Stock and (ii) the denominator of which shall be such Current Market Price, such 

 

 21 

 
reduction to become effective immediately prior to the opening of business on the Business Day following the Record Date; provided, however, that in the
event the then fair market value (as determined in good faith by the Company’s Board of Directors, whose determination shall be conclusive) of the portion of the Securities so distributed applicable to one share of Common Stock is equal to or
greater than the Current Market Price on the Record Date, in lieu of the foregoing adjustment, adequate provision shall be made so that each holder shall have the right to receive upon conversion of a Warrant (or any portion thereof) the amount of
Securities, other than capital stock, evidences of indebtedness and other assets, that such holder would have received had such holder converted such Warrant (or portion thereof) immediately prior to such Record Date. 
 In the event that such dividend or distribution is not so paid or made, the Exercise Price shall again be adjusted to be the Exercise Price which would
then be in effect if such dividend or distribution had not been declared. If the Company’s Board of Directors determines the fair market value of any distribution for purposes of this Section 9(d) by reference to the actual or when issued
trading market for any securities comprising all or part of such distribution, it must in doing so consider the prices in such market over the same period (the “Reference Period”) used in computing the Current Market Price pursuant to
Section 9(f) of this Warrant to the extent possible, unless the Company’s Board of Directors determines in good faith that determining the fair market value during the Reference Period would not be in the best interest of the holders.

 In the event that the Company implements a new shareholder rights plan, such rights plan shall provide that upon exercise of the Warrants
the holders will receive, in addition to the Common Stock issuable upon such exercise, the rights issued under such rights plan (as if the holder had exercised the Warrant prior to implementing the rights plan and notwithstanding the occurrence of
an event causing such rights to separate from the Common Stock at or prior to the time of exercise). Any distribution of rights or warrants pursuant to a shareholder rights plan complying with the requirements set forth in the immediately preceding
sentence of this paragraph shall not constitute a distribution of rights or warrants for the purposes of this Section 9(d). 
 Rights or
warrants distributed by the Company to all holders of Common Stock entitling the holders thereof to subscribe for or purchase shares of the Company’s capital stock (either initially or under certain circumstances), which rights or warrants,
until the occurrence of a specified event or events (“Trigger Event”), (i) are deemed to be transferred with such shares of Common Stock, (ii) are not exercisable, and (iii) are also issued in respect of future issuances of
Common Stock, shall be deemed not to have been distributed for purposes of this Section 9(d) (and no adjustment to the Exercise Price under this Section 9(d) will be required) until the occurrence of the earliest Trigger Event. If such
right or warrant is subject to subsequent events, upon the occurrence of which such right or warrant shall become exercisable to purchase different securities, evidences of indebtedness or other assets or entitle the holder to purchase a different
number or amount of the foregoing or to purchase any of the foregoing at a different purchase price, then the occurrence of each such event shall be deemed to be the date of issuance and record date with respect to a new right or warrant (and a
termination or expiration of the existing right or warrant without exercise by the holder thereof). In addition, in the event of any distribution (or deemed distribution) of rights or warrants, or any Trigger Event or other event (of the type
described in the preceding sentence) with respect thereto, that resulted in an 

  

 22 

 
adjustment to the Exercise Price under this Section 9(d), (1) in the case of any such rights or warrants that shall all have been redeemed or
repurchased without exercise by any holders thereof, the Exercise Price shall be readjusted upon such final redemption or repurchase to give effect to such distribution or Trigger Event, as the case may be, as though it were a cash distribution,
equal to the per share redemption or repurchase price received by a holder of Common Stock with respect to such rights or warrants (assuming such holder had retained such rights or warrants), made to all holders of Common Stock as of the date of
such redemption or repurchase, and (2) in the case of such rights or warrants all of which shall have expired or been terminated without exercise, the Exercise Price shall be readjusted as if such rights and warrants had never been issued.

 For purposes of this Section 9(d) and Sections 9(a) and (c) of this Warrant, any dividend or distribution to which
this Section 9(d) is applicable that also includes shares of Common Stock, or rights or warrants to subscribe for or purchase shares of Common Stock to which Section 9(a) or (c) of this Warrant applies (or both), shall be deemed
instead to be (1) a dividend or distribution of the evidences of indebtedness, assets, shares of capital stock, rights or warrants other than such shares of Common Stock or rights or warrants to which Section 9(c) of this Warrant
applies (and any Exercise Price reduction required by this Section 9(e) with respect to such dividend or distribution shall then be made) immediately followed by (2) a dividend or distribution of such shares of Common Stock or such rights
or warrants (and any further Exercise Price reduction required by Sections 9(a) and (c) of this Warrant with respect to such dividend or distribution shall then be made), except (A) the Record Date of such dividend or
distribution shall be substituted as “the date fixed for the determination of shareholders entitled to receive such dividend or other distribution,” “Record Date fixed for such determination” and “Record Date” within
the meaning of Section 9(a) of this Warrant and as “the date fixed for the determination of shareholders entitled to receive such rights or warrants,” “the Record Date fixed for the determination of the shareholders entitled
to receive such rights or warrants” and “such Record Date” within the meaning of Section 9(c) of this Warrant and (B) any shares of Common Stock included in such dividend or distribution shall not be deemed
“outstanding at the close of business on the date fixed for such determination” within the meaning of Section 9(a) of this Warrant. 
 (e) Subject to the provisions of Section 9(i), in case the Company shall, by dividend or otherwise, distribute to all holders of its Common Stock cash (excluding any cash that is distributed upon a merger or
consolidation to which Section 10 of this Warrant applies or as part of a distribution referred to in Section 9(d) of this Warrant), then immediately after the close of business on the Record Date for the distribution, the Exercise Price
shall be reduced so that the same shall equal the price determined by multiplying the Exercise Price in effect immediately prior to the close of business on such Record Date by a fraction (i) the numerator of which shall be equal to the Current
Market Price on the Record Date less the portion of the cash so distributed applicable to one (1) share of Common Stock and (ii) the denominator of which shall be equal to the Current Market Price on such date; provided, however, that in
the event the portion of the cash so distributed applicable to one share of Common Stock is equal to or greater than the Current Market Price of the Common Stock on the Record Date, in lieu of the foregoing adjustment, adequate provision shall be
made so that each holder shall have the right to receive upon exercise of a Warrant (or any portion thereof) the amount of cash such holder would have received had such holder exercised such Warrant (or portion thereof) immediately prior to such

  

 23 

 
Record Date. In the event that such dividend or distribution is not so paid or made, the Exercise Price shall again be adjusted to be the Exercise Price that
would then be in effect if such dividend or distribution had not been declared. 
 (f) For purposes of this Section 9, the
following terms shall have the meanings indicated: 
 (1) “Average Price” with respect to any security on any day shall mean
the daily volume weighted average price of such security for all sales reported on such day by the principal national security exchange or quotation system on which such security is quoted or listed or admitted to trading or, if not quoted or listed
or admitted to trading on any national securities exchange or quotation system, as reported by the National Quotation Bureau Incorporated, Pink Sheets LLC or a similar generally accepted reporting service, or, in case no sales of such security take
place on such day, the Average Price for such security on such day shall be the Closing Price. 
 (2) “Closing Price” with
respect to any securities on any day shall mean the closing sale price regular way on such day or, in case no such sale takes place on such day, the average of the reported closing bid and asked prices, regular way, in each case on the Nasdaq
National Market or New York Stock Exchange, as applicable, or, if such security is not listed or admitted to trading on such National Market or Exchange, on the principal national security exchange or quotation system on which such security is
quoted or listed or admitted to trading, or, if not quoted or listed or admitted to trading on any national securities exchange or quotation system, the average of the closing bid and asked prices of such security on the over-the-counter market on
the day in question as reported by the National Quotation Bureau Incorporated, Pink Sheets LLC or a similar generally accepted reporting service, or if not so available, in such manner as furnished by any New York Stock Exchange member firm selected
from time to time by the Board of Directors for that purpose, or a price determined in good faith by the Board of Directors, whose determination shall be conclusive. 
 (3) “Current Market Price” shall mean the average of the daily Average Prices per share of Common Stock for the ten (10) consecutive Trading Days immediately prior to the date in question;
provided, however, that (1) if the “ex” date (as hereinafter defined) for any event (other than the issuance or distribution requiring such computation) that requires an adjustment to the Exercise Price pursuant to Section 9(a),
(b), (c), (d) or (e) of this Warrant occurs during such ten (10) consecutive Trading Days, the Average Price for each Trading Day prior to the “ex” date for such other event shall be adjusted by multiplying such Average
Price by the same fraction by which the Exercise Price is so required to be adjusted as a result of such other event, (2) if the “ex” date for any event (other than the issuance or distribution requiring such computation) that
requires an adjustment to the Exercise Price pursuant to Section 9(a), (b), (c), (d) or (e) of this Warrant occurs on or after the “ex” date for the issuance or distribution requiring such computation and prior to the day in
question, the Average Price for each Trading Day on and after the “ex” date for such other event shall be adjusted by multiplying such Average Price by the reciprocal of the fraction by which the Exercise Price is so required to be
adjusted as a result of such other event, and (3) if the “ex” date for the issuance or distribution requiring such computation is prior to the day in question, after taking into account any adjustment required pursuant to clause
(1) or (2) of this proviso, the Average Price for each Trading Day on or after such “ex” date shall be adjusted by adding thereto the amount of any cash and the fair market value (as determined in good faith by the Company’s
Board of Directors in a manner consistent 

  

 24 

 
with any determination of such value for purposes of Section 9(d) of this Warrant, whose determination shall be conclusive) of the evidences of
indebtedness, shares of capital stock or assets being distributed applicable to one share of Common Stock as of the close of business on the day before such “ex” date. For purposes of this paragraph, the term “ex” date,
(1) when used with respect to any issuance or distribution, means the first date on which the Common Stock trades regular way on the relevant exchange or in the relevant market from which the Average Price was obtained without the right to
receive such issuance or distribution and (2) when used with respect to any subdivision or combination of shares of Common Stock, means the first date on which the Common Stock trades regular way on such exchange or in such market after the
time at which such subdivision or combination becomes effective. Notwithstanding the foregoing, whenever successive adjustments to the Exercise Price are called for pursuant to this Section 9, such adjustments shall be made to the Current
Market Price as may be necessary or appropriate to effectuate the intent of this Section 9 and to avoid unjust or inequitable results as determined in good faith by the Company’s Board of Directors. 
 (4) “fair market value” shall mean the amount which a willing buyer would pay a willing seller in an arm’s length transaction.

 (5) “Record Date” shall mean, with respect to any dividend, distribution or other transaction or event in which the holders
of Common Stock have the right to receive any cash, securities or other property or in which the Common Stock (or other applicable security) is exchanged for or converted into any combination of cash, securities or other property, the date fixed for
determination of shareholders entitled to receive such cash, securities or other property (whether such date is fixed by the Company’s Board of Directors or by statute, contract or otherwise). 
 (6) “Trading Day” shall mean (x) if the applicable security is listed or admitted for trading on the New York Stock Exchange or
another national security exchange, a day on which the New York Stock Exchange or such other national security exchange, as applicable, is open for business or (y) if the applicable security is quoted on the Nasdaq National Market, a day on
which trades may be made thereon or (z) if the applicable security is not so listed, admitted for trading or quoted, a Business Day. 
 (g) The Company may make such reductions in the Exercise Price, in addition to those required by Section 9(a), (b), (c), (d) or (e) of this Warrant, as the Company’s Board of Directors considers to be advisable to
avoid or diminish any income tax to holders of Common Stock or rights to purchase Common Stock resulting from any dividend or distribution of stock (or rights to acquire stock) or from any event treated as such for income tax purposes. 

(h) To the extent permitted by applicable law, the Company from time to time may reduce the Exercise Price by any amount for any period of time
if the period is at least twenty (20) days, the reduction is irrevocable during such period and the Company’s Board of Directors shall have made a determination that such reduction would be in the best interests of the Company, which
determination shall be conclusive and described in a Board Resolution. Whenever the Exercise Price is reduced pursuant to the preceding sentence, the Company shall mail or cause to be mailed to the holder of each Warrant at his last address in the
Warrant Register a notice of the reduction at least five (5) days prior to the date the reduced Exercise Price is to take effect, and such notice shall state the reduced Exercise Price and the period during which it will be in effect.

  

 25 

 (i) No adjustment in the Exercise Price shall be required under this Section 9 unless such
adjustment would require an increase or decrease of at least one percent (1%) in the Exercise Price; provided, however, that any adjustments which by reason of this Section 9(i) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment. All calculations under this Section 9 shall be made by the Company and shall be made to the nearest cent or to the nearest one hundredth of a share, as the case may be. No adjustment need be made
for a change in the par value of the Common Stock. 
 (j) Subject to Section 9(e), whenever the Conversion Price is adjusted as
provided in this Section 9, the Company shall promptly file with the Warrant Agent and any warrant agent other than the Warrant Agent an officer’s certificate setting forth the Exercise Price after such adjustment and setting forth a brief
statement of the facts requiring such adjustment. Promptly after delivery of such certificate, the Company shall prepare a notice of such adjustment of the Exercise Price setting forth the adjusted Exercise Price and the date on which each
adjustment becomes effective and shall send such notice of such adjustment of the Exercise Price to the holder of each Warrant at his last address appearing on the Warrant Register, within twenty (20) days of the effective date of such
adjustment. Failure to deliver such notice shall not effect the legality or validity of any such adjustment. 
 (k) In any case in which
this Section 9 provides that an adjustment shall become effective immediately after a Record Date for an event, the Company may defer until the occurrence of such event (i) issuing to the holder of any Warrant exercised after such Record
Date and before the occurrence of such event the additional shares of Common Stock issuable upon such conversion by reason of the adjustment required by such event over and above the Common Stock issuable upon such conversion before giving effect to
such adjustment and (ii) paying to such holder any amount in cash in lieu of any fraction pursuant to Section 2(c). 
 (l) For
purposes of this Section 9, the number of shares of Common Stock at any time outstanding shall not include shares held in the treasury of the Company but shall include shares issuable in respect of scrip certificates issued in lieu of fractions
of shares of Common Stock. The Company will not pay any dividend or make any distribution on shares of Common Stock held in the treasury of the Company. 
 (j) Notice to Holders of Warrants Prior to Certain Actions. In case: 
 (1) the Company
shall declare a dividend (or any other distribution) on its Common Stock that would require an adjustment in the Exercise Price pursuant to this Section 9; or 
 (2) the Company shall authorize the granting to the holders of its Common Stock of rights or warrants to subscribe for or purchase any share of any class or any other rights or warrants; or 
 (3) of any reclassification of the Common Stock of the Company (other than a subdivision or combination of its outstanding Common Stock, or a change
from par value to no par value), or of any consolidation or merger to which the Company is a party and for which approval of any shareholders of the Company is required, or of the sale and transfer of all or substantially all of the assets of the
Company; or 
  

 26 

 (4) of the voluntary or involuntary dissolution, liquidation or winding-up of the Company;

 the Company shall mail or cause to be mailed to the holder at such address appearing in the Warrant Register as promptly as possible but in any event at
least fifteen (15) days prior to the applicable date hereinafter specified, a notice stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution or rights are to be determined, or (y) the date
on which such reclassification, consolidation, merger, sale, transfer, dissolution, liquidation or winding-up is expected to become effective or occur, and the date as of which it is expected that holders of Common Stock of record shall be entitled
to exchange their Common Stock for securities or other property deliverable upon such reclassification, consolidation, merger, sale, transfer, dissolution, liquidation or winding-up. Failure to give such notice, or any defect therein, shall not
affect the legality or validity of such dividend, distribution, reclassification, consolidation, merger, sale, transfer, dissolution, liquidation or winding-up. In addition, whenever the Exercise Price is adjusted as provided in this Section 9,
the Company shall prepare a notice of such adjustment of the Exercise Price setting forth the adjusted Exercise Price and the date on which each adjustment becomes effective and shall mail such notice of such adjustment 
 of the Exercise Price to the holder of each Warrant at his last address in the Warrant Register within twenty (20) days of the effective date of such adjustment.
Failure to deliver such notice shall not effect the legality or validity of any such adjustment. 
 (k) In any case in which this
Section 9 provides that an adjustment shall become effective immediately after a Record Date for an event, the Company may defer until the occurrence of such event (i) issuing to the holder of any Warrant exercised after such Record Date
and before the occurrence of such event the additional shares of Common Stock issuable upon such exercise by reason of the adjustment required by such event over and above the Common Stock issuable upon such conversion before giving effect to such
adjustment and (ii) paying to such holder any amount in cash in lieu of any fractions of shares of Common Stock pursuant to Section 2(c) of this Warrant. 
 (l) For purposes of this Section 9, the number of shares of Common Stock at any time outstanding shall not include shares held in the treasury of the Company but shall include shares issuable in respect of
scrip certificates issued in lieu of fractions of shares of Common Stock. The Company will not pay any dividend or make any distribution on shares of Common Stock held in the treasury of the Company. 
 (m) Upon each adjustment of the Exercise Price pursuant to this Section 9, each Warrant shall thereupon evidence the right to purchase that
number of shares of Common Stock (calculated to the nearest hundredth of a share) obtained by multiplying the number of shares of Common Stock purchasable immediately prior to such adjustment upon exercise of the Warrant by the Exercise Price in
effect immediately prior to such adjustment and dividing the product so obtained by the Exercise Price in effect immediately after such adjustment. The adjustment pursuant to this Section 9(m) to the number of shares of Common Stock purchasable
upon exercise of a Warrant shall be made each time an adjustment of the Exercise Price is made pursuant to this Section 9 (or would be made but for Section 9(k) of this Warrant). 
 Section 10. Effect of Reclassification, Consolidation, Merger or Sale. If any of the following events occur, namely (i) any reclassification or change
of the outstanding shares of Common 

  

 27 

 
Stock (other than a change in par value, or from par value to no par value, or from no par value to par value, or as a result of a subdivision or
combination), (ii) any consolidation, merger or combination of the Company with another Person as a result of which holders of Common Stock shall be entitled to receive stock, securities or other property or assets (including cash) with respect
to or in exchange for such Common Stock (other than as a result of a change in name, a change in par value or a change in the jurisdiction of incorporation), (iii) any statutory exchange, as a result of which holders of Common Stock generally
shall be entitled to receive stock, securities or other property or assets (including cash) with respect to or in exchange for such Common Stock (such transaction, a “Statutory Exchange”), or (iv) any sale or conveyance of the
properties and assets of the Company as, or substantially as, an entirety to any other Person as a result of which holders of Common Stock shall be entitled to receive stock, securities or other property or assets (including cash) with respect to or
in exchange for such Common Stock, then the Company or the successor or purchasing Person (each of (i) through (iv), a “Common Stock Fundamental Change”), as the case may be, shall issue a replacement Warrant providing that such
Warrant shall be exercisable for the kind and amount of shares of stock and other securities or property or assets (including cash) receivable upon such Common Stock Fundamental Change by a holder of a number of shares of Common Stock issuable upon
exercise of such Warrants (assuming, for such purposes, a sufficient number of authorized shares of Common Stock available for issuance upon exercise of all such Warrants) immediately prior to such Common Stock Fundamental Change assuming such
holder of Common Stock did not exercise his rights of election, if any, that holders of Common Stock who were entitled to vote or consent to such transaction had as to the kind or amount of securities, cash or other property receivable upon such
Common Stock Fundamental Change (provided that, if the kind or amount of securities, cash or other property receivable upon such consolidation, merger, combination, Statutory Exchange, sale or conveyance is not the same for each share of Common
Stock in respect of which such rights of election shall not have been exercised (“non-electing share”), then for the purposes of this Section 10, the kind and amount of securities, cash or other property receivable upon such Common
Stock Fundamental Change for each non-electing share shall be deemed to be the kind and amount so receivable per share by a plurality of the non-electing shares). Such replacement Warrant shall provide for adjustments which shall be as nearly
equivalent as may be practicable to the adjustments provided for in Section 9 of this Warrant. If, in the case of any such Common Stock Fundamental Change, the stock or other securities and assets receivable thereupon by a holder of shares of
Common Stock include shares of stock or other securities and assets of a corporation other than the successor or purchasing Person, as the case may be, in such Common Stock Fundamental Change, then such replacement Warrant shall also be executed by
such other person and shall contain such additional provisions to protect the interests of the holders of the Warrants as the Company’s Board of Directors shall reasonably consider necessary by reason of the foregoing. The Exercise Price for
the stock and other securities, property and assets (including cash) so receivable upon such event shall be an amount equal to the Exercise Price immediately prior to such event. 
 The Company shall mail or cause to be mailed such replacement Warrant to each holder of Warrants, at such holder’s address appearing in the Warrant
Register within twenty (20) days after execution thereof. Failure to deliver such notice shall not affect the legality or validity of such replacement Warrant. 
  

 28 

 The above provisions of this Section 10 shall similarly apply to successive reclassifications,
changes, consolidations, mergers, combinations, sales and conveyances. 
 If this Section 10 applies to any event or occurrence,
Section 9 of this Warrant shall not apply. 
 Section 11. Lost, Stolen, Mutilated or Destroyed Warrants. If this Warrant is lost, stolen,
mutilated or destroyed, the Company shall promptly, on receipt of an indemnification undertaking or other form of security reasonably acceptable to the Company (or in the case of a mutilated Warrant, the Warrant), cause the Warrant Agent to issue a
new Warrant of like denomination and tenor as this Warrant so lost, stolen, mutilated or destroyed. In every case, the applicant for a replacement Warrant shall furnish to the Company such security or indemnity as may be reasonably required by the
Company to save it harmless, and, in every case of destruction, loss or theft, the applicant shall also furnish to the Company evidence to its satisfaction of the destruction, loss or theft of the applicant’s Warrant and of the ownership
thereof. Upon the issuance of any replacement Warrant, the Company may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses connected therewith.

 Section 12. Notice. Any notices, consents, waivers or other communications required or permitted to be given under the terms of this Warrant
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; 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. If notice is to be sent to the Company, the holder shall use its reasonable best efforts to provide additional copies to the individuals listed below;
provided, however, that the failure of such holder to send such additional copies shall in no way limit the effectiveness of any notice sent to the Company as provided for below. The addresses and facsimile numbers for such communications shall be:

 If to the Company: 
  

					
	 Sipex Corporation
 233 South Hillview Drive

	  	
		
	 Milpitas, California 95035
	  	
		
	 Telephone: (408) 934-7500
	  	
		
	 Facsimile: (408) 935-7600
	  	
			
	Attention:            	  	 Ray Wallin
	  	

 with a copy to: 
 Wilson, Sonsini, Goodrich & Rosati P.C. 
  

 29 

			
	 650 Page Mill Road
 Palo Alto, California
94303
 Telephone:
 Facsimile:
 Attention:
	  	 (650) 565-3765
 (650) 493-6811
 Allison Spinner, Esq.

 If to the Transfer Agent: 
 Computershare 
 250 Royall Street

 Canton, MA 02021 
 Telephone:
(718) 575-3390 
 Facsimile: (718) 575-2549 
 Attention: Novette Lee 
 If to the Warrant Agent: 
 Wells Fargo Bank, National Association 
 707 Wilshire Blvd., 17th Floor 
 Los Angeles, CA 90017 
 Telephone: (213) 614-2588 
 Facsimile:
(213) 614-3355 
 Attention: Corporate Trust Services 
 If to a holder of this Warrant, to it at the address and facsimile number set forth on the Schedule of Buyers to the Securities Purchase Agreement, with copies to such holder’s representatives as set forth on
such Schedule of Buyers, or at such other address and facsimile as shall be delivered to the Company upon the issuance or transfer of this Warrant. Each party shall provide five days’ prior written notice to the other party of any change in
address or facsimile number. 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. 
 Section 13. Amendments. This Warrant and any term hereof may be amended, changed, waived, discharged,
or terminated only by an instrument in writing signed by the Company and holders of 66 2/3% of the Warrant Shares
represented by all outstanding Warrants. Such amendment, change, waiver, discharge or termination shall be binding on the Company and all of the Warrant holder’s assignees and transferees; provided, however, that no such action may increase the
Exercise Price, including by a waiver of or an amendment to Section 9 of this Agreement, or decrease the number of shares or class of stock issuable upon exercise of any Warrants without the written consent of the holder of such Warrant. No
waivers of any term, condition or provision of this Warrant in any one or more instances shall be deemed to be or construed as a further or continuing waiver of any such term, condition or provision. 
  

 30 

 Section 14. Governing Law; Jurisdiction; Waiver of Jury Trial. The corporate laws of the State of Delaware
shall govern all issues concerning the relative rights of the Company and its shareholders. All other questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be governed by the internal laws of the State
of New York, without giving effect to any choice of law or conflict of law provision or rule (whether of the State of New York or any other jurisdictions) that would cause the application of the laws of any jurisdictions other than the State of New
York. Each party hereby irrevocably submits to the non-exclusive jurisdiction of the state and federal courts sitting in the City of New York, Borough of Manhattan, 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 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. If any provision of this Warrant shall be invalid or unenforceable in any jurisdiction, such invalidity or unenforceability shall not affect the validity or
enforceability of the remainder of this Warrant in that jurisdiction or the validity or enforceability of any provision of this Warrant 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 HEREWITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY. 
 Section 15. Challenge to Good Faith Determination. Whenever the Board of Directors of the Company shall be required to make a determination in good faith of the fair value of any item under this Agreement, such determination may
be challenged in good faith by holders holding in the aggregate a majority of the then outstanding Warrants without regard to any Warrants then held by the Company or its affiliates, and any dispute shall be resolved by an investment banking firm of
national standing selected by the Company. The fee of such investment banking firm shall be paid by the Company. 
 Section 16. Descriptive
Headings. The headings of this Warrant are for convenience of reference only and shall not limit or otherwise affect the meaning hereof. 
 IN WITNESS
WHEREOF, the Company has caused this Warrant to be duly executed as of day and year first above written. 
  

			
	“COMPANY”
	 SIPEX CORPORATION

		
	 By:
 Its:
	 	 /s/ Clyde R. Wallin
 Sr. VP Finance &
CFO

  

 31 

 EXHIBIT A TO WARRANT 
 FORM OF EXERCISE NOTICE 
 The undersigned holder hereby exercises the right to
         purchase shares of Common Stock (“Warrant Shares”) of Sipex Corporation, a Delaware corporation (the “Company”), evidenced by the attached Warrant (the
“Warrant”). Capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Warrant. 
 1. Form of Exercise Price. The holder intends that payment of the Exercise Price shall be made as: 
 —“Cash
Exercise” with respect to          Warrant Shares; and/or 
 —“Cashless
Exercise” with respect to          Warrant Shares (to the extent permitted by the terms of the Warrant). 
 2. Payment of Exercise Price. In the event that the holder has elected a Cash Exercise with respect to some or all of the Warrant Shares to be issued pursuant hereto, the holder shall pay the sum of $
             to the Company in accordance with the terms of the Warrant. In the event that the holder has elected a Cashless Exercise with respect to some or all of the Warrant
Shares to be issued pursuant hereto, the holder of this Warrant represents that such holder is either an “accredited investor” as such term is defined in Rule 501(a) of Registration D promulgated by the Securities and Exchange Commission
under the Securities Act and/or a “qualified institutional buyer” as such term is defined in Rule 144A promulgated by the Securities and Exchange Commission under the Securities Act and was not organized for the specific purpose of
acquiring Warrant Shares. 
 3. Delivery of Warrant Shares. The holder of this warrant has sold or will sell the shares of common
stock issuable pursuant to this Notice pursuant to a registration statement or an exemption from registration under the Securities Act of 1933, as amended. 
 4. Private Placement Representations. The holder of this Warrant confirms the continuing validity of, and reaffirms as of the date hereof, its representations and warranties set forth in Section 7 of
the Warrant. 
 Date:    ,      
  

					
	 Name of Registered Holder
	  	Tax ID of Registered Holder
		 		  	 (if applicable)

	 By:
	 	  
	  	
	 Its:
	 	  
	  	

  

 32 

 ACKNOWLEDGMENT 
 The Company hereby acknowledges this Exercise Notice and hereby directs          to issue the above indicated number of shares of Common Stock in accordance with
the Irrevocable Transfer Agent Instructions dated , 2006 from the Company and acknowledged and agreed to by         . 
  

			
	SIPEX CORPORATION
		
	By:	 	
	Its:	 	

  

 33 

 EXHIBIT B TO WARRANT 
 FORM OF ASSIGNMENT 
 FOR VALUE RECEIVED, the undersigned does hereby assign and
transfer to        , Federal Identification No.        , a warrant to purchase        
shares of the capital stock of Sipex Corporation, a Delaware corporation, represented by warrant certificate no.        , standing in the name of the undersigned on the books of said
corporation. The undersigned does hereby irrevocably constitute and appoint        , attorney to transfer the warrants of said corporation, with full power of substitution in the premises.

 Dated:    ,200     

			
		
	By:	 	
	Its:	 	
	
	Taxpayer I.D. No. or Soc. Sec. No:         
	Address:                  
        

 Name in which new Warrant(s) should be registered: 
 Right to Purchase No. of Shares of Common Stock:          
 Name:          
 Taxpayer I.D.
No. or Soc. Sec. No:          
 Address:         
 The balance of the attached Warrant not so transferred shall be
returned to the transferor in the form of a new Warrant reflecting such reduced amount. 
  

 34Amendment to Warrant Agreement

 Exhibit 4.2 
 THIS AMENDMENT (this “Amendment”), is dated as of August 28, 2007, by and among Exar Corporation, a Delaware corporation (“Exar”), and Wells Fargo Bank, National
Association, as Warrant Agent (the “Warrant Agent”), to the Warrant Agent Agreement referred to below. Capitalized terms used but not defined herein shall have the respective meanings given to such terms in the Agreement.

 WITNESSETH: 
 WHEREAS,
Sipex Corporation (the “Company”) and the Warrant Agent are parties to a Warrant Agent Agreement (the “Agreement”), dated as of May 16, 2006, providing for the Warrant Agent to act on behalf of the Company in
connection with the transfer, exchange and exercise of warrants to purchase common stock of the Company, as hereinafter described (the “Warrants”), which in the aggregate initially entitled the holders thereof to purchase 1,679,104 shares
of Common Stock of the Company (the “Common Stock” and with the Common Stock issuable on exercise of the Warrants being referred to as the “Warrant Shares”). 
 WHEREAS, the Company has entered into an agreement and plan of merger, dated as of May 7, 2007, with Exar and Exar’s wholly owned
subsidiary, Side Acquisition Corp., a Delaware corporation (“Merger Sub”), pursuant to which (i) Merger Sub has merged with and into the Company (the “Merger”), with the Company continuing as the surviving
entity, (ii) each issued and outstanding ordinary share of common stock of the Company was converted into the right to receive 0.6679 of a share of validly issued, fully paid and nonassessable Exar common stock (iii) the Company will
become a direct or indirect wholly owned subsidiary of Exar; 
 WHEREAS, in accordance with Section 10 of the Warrants, it is
required that in connection with a Common Stock Fundamental Change (as defined therein) as a result of the Merger, Exar, as the purchasing Person, issue a replacement warrant that provides (i) that such Warrant shall be exercisable into the
kind and amount of shares of stock and other securities or property or assets (including cash) receivable upon the Merger by a holder of a number of shares of Common Stock issuable upon exercise of the Warrant immediately prior to the Merger (the
“Merger Consideration”); and (ii) for adjustments which shall be as nearly equivalent as may be practicable to the adjustments provided for in Section 9 of the Warrants; 
 WHEREAS, pursuant to Section 10 of the Warrants, the Company shall cause notice of the execution of the replacement Warrants to be sent to
each holder of Warrants, at his address appearing on the Warrant Register within twenty (20) days after execution hereof; and 
 NOW
THEREFORE, in consideration of the foregoing and for good and valuable consideration, the receipt of which is hereby acknowledged, Exar and the Warrant Agent mutually covenant and agree for the equal and ratable benefit of the Warrantholders as
follows: 
 SECTION 1. Effect of Merger. Exar hereby agrees that (i) it will issue a replacement Warrant for each issued and
outstanding Warrant, which will be exercisable into 

 
the Merger Consideration (which for the avoidance of doubt, shall be equal to $9.63 multiplied by the number of Warrant Shares as to which such Warrant is
being exercised), and (ii) adjustments to the Exercise Price shall be as nearly equivalent as may be practicable to the adjustments of the Exercise Price provided for in Section 9 of the Warrants. 
 SECTION 3. Amendment to Section 12 of the Agreement. Section 12 of the Agreement is hereby amended, together with all necessary
conforming changes to the Agreement, to add the following language: 
 “If to Exar, to: 
 Exar Corporation 
 48720 Kato Road 
 Fremont, California 94538 
 Facsimile: (510) 668-7002 
 Attn: Thomas R. Melendrez 
 SECTION 4. Ratification of Agreement; Amendment Part of Agreement. Except
as expressly amended hereby, the Agreement is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Amendment shall form a part of the Agreement for all purposes, and
every Warrantholder heretofore or hereafter authenticated and delivered shall be bound hereby. 
 SECTION 5. Governing Law.
THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 SECTION 6. The Warrant
Agent. The Warrant Agent shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Amendment or for or in respect of the recitals contained herein, all of which are made solely by Exar. Except as
otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed by the Warrant Agent by reason of this Amendment. This Amendment is executed and accepted by the Warrant Agent subject
to all the terms and conditions set forth in the Agreement with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Warrant Agent with respect hereto. In entering into this Amendment,
the Warrant Agent shall be entitled to the benefit of every provision of the Agreement relating to the conduct or affecting the liability or affording protection to the Warrant Agent, whether or not elsewhere herein so provided. 
 SECTION 7. Counterparts. The parties may sign any number of copies of this Amendment. Each signed copy shall be an original, but all of them
together represent the same agreement. 
 SECTION 8. Effect of Headings. The Section headings herein are for convenience only and
shall not effect the construction of this Amendment. 

 IN WITNESS WHEREOF, the parties have caused this Amendment to be duly executed as of the date first
written above. 
  

			
	EXAR CORPORATION
		
	By:	 	 /s/ Thomas R. Melendrez

		 	Name: Thomas R. Melendrez
		 	 Title: General Counsel, Secretary and Executive Vice President

 IN WITNESS WHEREOF, the parties have caused this Amendment to be duly executed as of the date first
written above. 
  

			
	WELLS FARGO BANK, NATIONAL ASSOCIATION, as Warrant Agent
		
	By:	 	 /s/ Maddy Hall

		 	Name: Maddy Hall
		 	Title: Assistant Vice President

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