Document:

Exhibit 4.4

    EXHIBIT
      4.4

    Right
      to

    Purchase
      __________

    Shares
      of

    Common
      Stock,

    par
      value
      $0.001

    per
      share

     

    COMMON
      STOCK PURCHASE WARRANT D

     

    THIS
      CERTIFIES THAT,
      for value received, ____________ or its registered assigns (the
“Holder”), is entitled to purchase from Geron Corporation, a Delaware
      corporation (the "Company"), at any time or from time to time during the period
      specified in Paragraph 2 hereof, ____________ (______) fully paid and
      nonassessable shares of the Company's common stock, par value $0.001 per share
      (the "Common Stock"), at a per share exercise price equal to the lesser of
      (i)
      120% of the average of the closing bid price of the Common Stock on the
      Principal Exchange (as defined in that certain Securities Purchase Agreement,
      dated December 13, 2006, by and among the Company and the Buyers listed on
      the
      execution page thereof (the "Purchase Agreement")) for the five (5) Trading
      Day
      (as defined in the Purchase Agreement) period immediately prior to the Exercise
      Period Start Date (as defined below) and (ii) $12.14 (the "Exercise Price").
      The
      term "Warrant Shares," as used herein, refers to the shares of Common Stock
      purchasable hereunder. The Warrant Shares and the Exercise Price are subject
      to
      adjustment as provided in Paragraph 4 hereof. The term "Warrants" means
      this Warrant and the warrants (including the  A Warrants, B Warrants and
      the C Warrants (each as defined in the Purchase Agreement)) issued pursuant
      to
      the Purchase Agreement. 

     

    This
      Warrant is subject to the following terms, provisions, and
      conditions:

     

    1.  Manner
      of Exercise; Issuance of Certificates; Payment for Warrant Shares

     

    (a)  Subject
      to the provisions hereof, this Warrant may be exercised by the Holder, in whole
      or in part, by the surrender of this Warrant, together with a completed exercise
      agreement in the form attached hereto (the "Exercise Agreement"), to the Company
      during normal business hours on any business day at the Company's principal
      executive offices (or such other office or agency of the Company as it may
      designate by notice to the Holder), and upon (i) payment to the Company in
      cash,
      by certified or official bank check or by wire transfer for the account of
      the
      Company of the Exercise Price for the Warrant Shares specified in the Exercise
      Agreement or (ii) delivery to the Company of a written notice of an election
      to
      effect a "Cashless Exercise" (as defined in Paragraph 10(c) below) for the
      Warrant Shares specified in the Exercise Agreement (a “Conversion”). The Company
      may elect to provide that any exercise of the Warrant shall be a Conversion
      (a
“Company-Elected Conversion”). The Company shall provide written notice of such
      election (a “Company Conversion Election”) by the end of the business day
      following the date of the receipt of the Exercise Agreement. 

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

       

      
        	 	
                The
                  Warrant Shares purchased by the Holder shall be deemed to be issued
                  to the
                  Holder or such holder's designee, as the record owner of such shares,
                  as
                  of the close of business on the date on which this Warrant shall
                  have been
                  surrendered, the completed Exercise Agreement shall have been delivered,
                  and payment shall have been made for such shares (or an election
                  to effect
                  a Conversion or a Company Conversion Election shall have been made)
                  as set
                  forth above. In the event of any exercise of the rights represented
                  by
                  this Warrant in accordance with and subject to the terms and conditions
                  hereof (whether by payment of the exercise price, Conversion or
                  Company-Elected Conversion), the Warrant Shares shall be issued
                  and
                  delivered to the Depository Trust Company account on the Holder’s behalf
                  via the Deposit Withdrawal Agent Commission system ("DWAC Transfer")
                  within a reasonable time, not exceeding two (2) trading days after
                  such
                  exercise (or,
                  if DWAC Transfer is not available or Holder requests in writing
                  otherwise,
                  certificates
                  for the Warrant Shares shall be issued, dated the date of such
                  exercise
                  and delivered to the Holder hereof within a reasonable time, not
                  exceeding
                  three (3) trading days after such exercise),
                  and the Holder hereof shall be deemed for all purposes to be the
                  holder of
                  the Warrant Shares so purchased as of the date of such exercise.
                  If the
                  Warrant Shares are issued pursuant to a Company-Elected Conversion,
                  the
                  number of Warrant Shares to be issued within the time period specified
                  in
                  the preceding sentence shall equal the number of Warrant Shares
                  to be
                  delivered if such Cashless Exercise was made at the Holder’s election (the
                  “Estimated Warrant Shares”); provided,
                  however,
                  that within three (3) trading days after the number of Warrant
                  Shares to
                  be issued pursuant to Paragraph 10(c) is able to be calculated
                  (i) if the
                  number of Estimated Warrant Shares exceeds the number of Warrant
                  Shares to
                  be delivered pursuant to Paragraph 10(c) hereof, Holder shall return
                  to
                  the Company the number of Warrant Shares which exceed the number
                  of
                  Warrant Shares to which Holder is entitled pursuant to Paragraph
                  10(c);
                  and (ii) if the Estimated Warrant Shares are less than the number
                  of
                  Warrant Shares to be delivered pursuant to Paragraph 10(c) hereof,
                  the
                  Company shall issue to Holder the number of Warrant Shares equal
                  to the
                  difference between the Estimated Warrant Shares and the Warrant
                  Shares to
                  be delivered pursuant to Paragraph 10(c). Any certificates requested
                  shall
                  be delivered in such denominations as may be requested by the Holder
                  and
                  shall be registered in the name of the Holder or such other name
                  as shall
                  be designated by the Holder. If this Warrant shall have been exercised
                  only in part, then, unless this Warrant has expired, the Company
                  shall, at
                  its expense, at the time of delivery of such certificates, deliver
                  to the
                  Holder a new Warrant representing the number of shares with respect
                  to
                  which this Warrant shall not then have been exercised. In the event
                  an
                  Exercise Agreement is delivered and the Company is unable to issue
                  the
                  Warrant Shares, the Holder may, at its option, rescind such Exercise
                  Agreement and such rescission will not effect the Holder's right
                  to an
                  extension of the Exercise Period pursuant to Section 4.13 of the
                  Purchase
                  Agreement. In any event, if the Company is unable to issue the
                  Warrant
                  Shares via DWAC transfer (or otherwise without restrictive legend),
                  because (i) the Securities and Exchange Commission (the “Commission”) has
                  issued a stop order with respect to the registration statement
                  relating to
                  the Shares (the “Registration Statement”), (ii) the Commission otherwise
                  has suspended or withdrawn the effectiveness of the Registration
                  Statement, either temporarily or permanently, (iii) the Company
                  has
                  suspended or withdrawn the effectiveness of the Registration Statement,
                  either temporarily or permanently, (iv) no exemption from the registration
                  requirements is otherwise available (including, without limitation,
                  under
                  Section 3(a)(9) of the Act by virtue of a Conversion or Company-Elected
                  Conversion) or (v) otherwise, the Company shall not be required
                  to make
                  any cash payments to the Holder in lieu of issuance of the Warrant
                  Shares.
                  Further, subject to Section 4.13 of the Purchase Agreement, the
                  Warrant
                  shall not be exercisable if (i) the Registration Statement is not
                  effective at the time of exercise or (ii) an exemption from the
                  registration requirements of the Securities Act, as amended (the
                  "Act"),
                  is not available; provided, however, that for purposes of Section
                  4.13 of
                  the Purchase Agreement and the extension of the Exercise Period
                  pursuant
                  thereto, (x) the Company will have been deemed unable to issue
                  Warrant
                  Shares without restrictive legend and (y) the Warrant shall be
                  deemed to
                  have been exercised, if at the time the Holder attempts to deliver
                  an
                  Exercise Agreement, (1) the Registration Statement is not effective
                  and
                  (2) no exemption from the registration requirements of the Act
                  is
                  available (including, without limitation, under Section 3(a)(9)
                  of the Act
                  by virtue of a Conversion or Company-Elected Conversion).
                  

              

      

       

             

    

    
      
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    (b)  Notwithstanding
      anything in this Warrant to the contrary, in no event shall the Holder be
      entitled to exercise a number of Warrants (or portions thereof) in excess of
      the
      number of Warrants (or portions thereof) upon exercise of which the sum of
      (i)
      the number of shares of Common Stock beneficially owned by the Holder and its
      affiliates (other than shares of Common Stock which, but for this proviso,
      may
      be deemed beneficially owned through the ownership of the unexercised Warrants
      and the unexercised or unconverted portion of any other securities of the
      Company subject to a limitation on conversion or exercise analogous to the
      limitation contained herein) and (ii) the number of shares of Common Stock
      issuable upon exercise of the Warrants (or portions thereof) with respect to
      which the determination described herein is being made, would result in
      beneficial ownership by the Holder and its affiliates of more than 4.9% of
      the
      outstanding shares of Common Stock. For purposes of the immediately preceding
      sentence, beneficial ownership shall be determined in accordance with Section
      13(d) of the Securities Exchange Act of 1934, as amended, and Regulations 13D-G
      thereunder, except as otherwise provided in this paragraph (b). Notwithstanding
      anything in this Warrant to the contrary, the restrictions on exercise of this
      Warrant set forth in this paragraph shall not be amended without (i) the written
      consent of the Holder and the Company and (ii) the approval of the holders
      of a
      majority of the Common Stock present, or represented by proxy, and voting at
      any
      meeting called to vote on the amendment of such restriction. 

     

    2.  Period
      of Exercise.This Warrant is exercisable at any
      time or from time to time on or after the earlier of (i) June 13, 2007 and
      (ii)
      immediately prior to the closing of a Fundamental Transaction (as defined below)
      (“Exercise Period Start Date”) and before 5:00 p.m., New York City time on
      December 15, 2010 (the "Exercise Period"); provided, however, that the Exercise
      Period may be extended pursuant to Section 4.13 of the Purchase
      Agreement.

     

    3.  Certain
      Agreements of the Company. The Company hereby
      covenants and agrees as follows:

     

    (a)  Shares
      to be Fully Paid. All Warrant Shares will, upon
      issuance in accordance with the terms of this Warrant, be validly issued, fully
      paid, and nonassessable and free from all taxes, liens, and charges with respect
      to the issue thereof.

     

    
      
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    (b)  Reservation
      of Shares. During the Exercise Period, the Company
      shall at all times have authorized, and reserved for the purpose of issuance
      upon exercise of this Warrant, a suf-ficient number of shares of Common Stock
      to
      provide for the full exercise of this Warrant.

     

    (c)  Listing.
      The Company shall promptly secure the listing of the Warrant Shares
      upon each national securities exchange or 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) and shall maintain, so long as any
      other
      shares of Common Stock shall be so listed, such listing of all Warrant Shares;
      and the Company shall so 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.

     

    (d)  Certain
      Actions Prohibited. The Company will not, by
      amendment of its charter or through any reorganization, transfer of assets,
      consolidation, merger, dissolution, issue or sale of securities, or any other
      voluntary action, avoid or seek to avoid the observance or performance of any
      of
      the terms to be observed or performed by it hereunder, but will at all times
      in
      good faith assist in the carrying out of all the provisions of this Warrant
      and
      in the taking of all such action as may reasonably be requested by the Holder
      in
      order to protect the exercise privilege of the Holder against dilution or other
      impairment, consistent with the tenor and purpose of this Warrant. Without
      limiting the generality of the foregoing, the Company (i) will not increase
      the
      par value of any shares of Common Stock receivable upon the exercise of this
      Warrant above the Exercise Price then in effect, and (ii) will take all such
      actions as may be 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. 

     

    (e)  Successors
      and Assigns. This Warrant will be binding upon any
      entity succeeding to the Company by merger, consolidation, or acquisition of
      all
      or substantially all the Company's assets. 

     

    4.  Antidilution
      Provisions. During the Exercise Period, the
      Exercise Price and the number of Warrant Shares shall be subject to adjustment
      from time to time as provided in this Paragraph 4. In the event that any
      adjustment of the Exercise Price as required herein results in a fraction of
      a
      cent, such Exercise Price shall be rounded up to the nearest cent.

     

    (a)  Subdivision
      or Combination of Common Stock. If the Company at
      any time subdivides (by any stock split, stock dividend, recapitalization,
      reorganization, reclassification or otherwise) the shares of Common Stock
      acquirable hereunder into a greater number of shares, then, after the date
      of
      record for effecting such subdivision, the Exercise Price in effect immediately
      prior to such subdivision will be proportionately reduced. If the Company at
      any
      time combines (by reverse stock split, recapitalization, reorganization,
      reclassification or otherwise) the shares of Common Stock acquirable hereunder
      into
      a smaller number
      of shares, then, after the date of record for effecting such combination, the
      Exercise Price in effect immediately prior to such combination will
      be
proportionately
      increased. "Common
      Stock," for purposes of this Paragraph 4, includes the Common Stock, par value
      $0.001 per share, and any additional class of stock
      of
      the Company having no preference as to dividends or
      distributions on liquidation, provided that the shares purchasable pursuant
      to
      this Warrant shall include only
      shares of Common Stock, par value $0.001 per share, in respect
      of which this Warrant is exercisable, or shares resulting from any subdivision
      or combination of such Common
      Stock, or in the case of any reorganization, reclassification, consolidation,
      merger, or sale of the character referred to in Paragraph 4(c) hereof, the
      stock or other securities
      or property provided for in such Paragraph.

     

    
      
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    (b)  Adjustment
      in Number of Shares. Upon each adjustment of the
      Exercise Price pursuant to the provisions of this Paragraph 4, the number of
      shares of Common Stock issuable upon exercise of this Warrant shall be adjusted
      by multiplying a number equal to the Exercise Price in effect immediately prior
      to such adjustment by the number of shares of Common Stock issuable upon
      exercise of this Warrant immediately prior to such adjustment and dividing
      the
      product so obtained by the adjusted Exercise Price.

     

    (c)  Consolidation,
      Merger or Sale. In case of (i) any consolidation
      of the Company with, or merger of the Company into any other corporation or
      entity, or (ii) any sale or conveyance of all or substantially all of the assets
      of the Company other than in connection with a plan of complete liquidation
      of
      the Company (each of clause (i) and (ii) shall be referred to as a “Fundamental
      Transaction”), then as a condition of such Fundamental Transaction, adequate
      provision will be made whereby the Holder will thereafter (at any time or from
      time to time during the remainder of the Exercise Period) have the right to
      acquire and receive upon exercise of this Warrant in lieu of the shares of
      Common Stock immediately theretofor acquirable upon the exercise of this
      Warrant, such shares of stock, securities or assets as may be issued or payable
      with respect to or in exchange for the number of shares of Common Stock
      immediately theretofore acquirable and receivable upon exercise of this Warrant
      had such Fundamental Transaction not taken place.

     

    In
      any
      such case, the Company will make appropriate provision to insure that the
      provisions of this Paragraph 4 hereof will thereafter be applicable as nearly
      as
      may be in relation to any shares of stock or securities thereafter deliverable
      upon the exercise of this Warrant. The Company will not effect any Fundamental
      Transaction unless prior to the consummation thereof, (i) the successor or
      acquiring entity (if other than the Company), (ii) any other entity whose stock,
      securities or assets the holders of the Common Stock of the Company are entitled
      to receive as a result of such Fundamental Transaction and (iii) any parent,
      subsidiary or affiliate of such successor, acquiring entity or other entity
      whose common stock this Warrant shall be exercisable into by virtue of the
      penultimate paragraph of this Section 4(c) (any or all of such entities being
      hereafter referred to as a “Successor Entity”) assumes
      by written instrument the obligations under this Paragraph 4 and the obligations
      to deliver to the Holder such shares of stock, securities or assets as, in
      accordance with the foregoing provisions, the Holder may be entitled to
      acquire.

     

    
      
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    Furthermore,
      in the event of a transaction contemplated by this Paragraph 4(c) involving
      the
      acquisition of the Company by a Public Acquirer (as defined below) for
      consideration consisting of all or part cash, at the option of the Holder,
      in
      lieu of any cash in respect of shares of Common Stock underlying this Warrant,
      this Warrant (or such proportion thereof as is equal to the proportion of cash
      to stock to be paid for the Company) shall thereafter be exercisable for the
      common stock of the Public Acquirer for the remainder of the Exercise Period
      (and otherwise in accordance with the terms hereof), with the number of shares
      thereafter underlying this Warrant determined by multiplying the number of
      shares for which this Warrant is exercisable immediately prior to such
      transaction by a fraction, the numerator of which is the cash consideration
      per
      share paid for the Company and the denominator of which is the Market Price
      of
      the Public Acquirer’s common stock, where “Market Price” means the average
      closing price of the Public Acquirer’s common stock over the five trading days
      immediately following the closing date of the transaction. In the case of a
      transaction involving partial cash consideration, the proportion of this Warrant
      as is equal to the proportion of stock to cash in such transaction shall
      thereafter be exercisable for stock of the Public Acquirer in accordance with
      the preceding terms of this Paragraph 4(c), with the number of shares underlying
      this Warrant adjusted to reflect the number of shares of common stock of the
      Public Acquirer to be issued for each share of Common Stock of the Company.
      Following any adjustment hereunder, the Exercise Price shall be proportionately
      adjusted, by multiplying the Exercise Price then in effect by a fraction, the
      numerator of which is the number of shares issuable prior to the adjustment
      and
      the denominator of which is the number of shares issuable after the adjustment.
      “Public Acquirer” means any entity that has publicly traded common stock whether
      publicly traded in the United States or in any other jurisdiction, it being
      understood that (1) “common stock” as used in this Paragraph 4(c) includes
      common equity equivalents, trust shares, limited partnership interests, ordinary
      shares, American Depositary Receipts, American Depositary Shares, and any other
      similar securities or derivate thereof, and (2) the Company shall be deemed
      to
      have been acquired by a Public Acquirer where any Successor Entity has publicly
      traded common stock whether traded in the United States or any other
      jurisdiction, even if such Successor Entity is not the direct acquirer or
      successor to the Company. Following any transaction contemplated by this
      Paragraph 4(c) the term Warrant Shares shall be deemed to refer to the shares
      for which this Warrant is thereafter exercisable in accordance with the
      provisions hereof.

     

    In
      addition, if holders of Common Stock are given a choice as to the securities,
      cash (which shall be treated in accordance with the preceding paragraph) or
      property to be received in a Fundamental Transaction (including a right to
      elect
      to receive any particular one or combination of more than one of the foregoing),
      then the Holder shall be given the same choice of consideration upon any
      exercise of this Warrant following such Fundamental Transaction, which choice
      of
      consideration can be made at the time of exercise at any time prior to the
      expiration of the Exercise Period.

     

    
      
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    (d)  Distribution
      of Assets. In case the Company shall declare or
      make any distribution of its assets (including cash) to holders of Common Stock
      as a partial liquidating dividend, by way of return of capital or otherwise,
      then, after the date of record for determining stockholders entitled to such
      distribution, but prior to the date of distribution, the Holder shall be
      entitled upon exercise of this Warrant for the purchase of any or all of the
      shares of Common Stock subject hereto, to receive the amount of such assets
      which would have been payable to the holder had such holder been the holder
      of
      such shares of Common Stock on the record date for the determination of
      stockholders entitled to such distribution.

     

    (e)  Notice
      of Adjustment. Upon the occurrence of any event
      which requires any adjustment of the Exercise Price, then, and in each such
      case, the Company shall give notice thereof to the Holder, which notice shall
      state the Exercise Price resulting from such adjustment and the increase or
      decrease in the number of Warrant Shares purchasable at such price upon
      exercise, setting forth in reasonable detail the method of calculation and
      the
      facts upon which such calculation is based. Such calculation shall be certified
      by the chief financial officer of the Company.

     

    (f)  Minimum
      Adjustment of Exercise Price. No adjustment of the
      Exercise Price shall be made in an amount of less than 1% of the Exercise Price
      in effect at the time such adjustment is otherwise required to be made, but
      any
      such lesser adjustment shall be carried forward and shall be made at the time
      and together with the next subsequent adjustment which, together with any
      adjustments so carried forward, shall amount to not less than 1% of such
      Exercise Price.

     

    (g)  No
      Fractional Shares. No fractional shares of Common
      Stock are to be issued upon the exercise of this Warrant. If the exercise of
      this Warrant would result in a fractional share of Common Stock, such fractional
      share shall be disregarded and the number of shares of Common Stock issuable
      upon exercise of the Warrant shall be the next higher number of shares.

     

    (h)  Other
      Notices. In case at any time:

     

    (i)  the
      Company shall declare any dividend upon the Common Stock payable in shares
      of
      stock of any class or make any other distribution (including dividends or
      distributions payable in cash out of retained earnings) to the holders of the
      Common Stock;

     

    (ii)  the
      Company shall offer for subscription pro rata to the holders of the Common
      Stock
      any additional shares of stock of any class or other rights;

     

    (iii)  there
      shall be any capital reorganization of the Company, or reclassification of
      the
      Common Stock, or consolidation or merger of the Company with or into, or sale
      of
      all or substantially all its assets to, another corporation or entity;
      or

     

    
      
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    (iv)  there
      shall be a voluntary or involuntary dissolution, liquidation or winding-up
      of
      the Company;

     

    then,
      in
      each such case, the Company shall give to the Holder (a) notice of the date
      on
      which the books of the Company shall close or a record shall be taken for
      determining the holders of Common Stock entitled to receive any such dividend,
      distribution, or subscription rights or for determining the holders of Common
      Stock entitled to vote in respect of any such reorganization, reclassification,
      consolidation, merger, sale, dissolution, liquidation or winding-up and (b)
      in
      the case of any such reorganization, reclassification, consolidation, merger,
      sale, dissolution, liquidation or winding-up, notice of the date (or, if not
      then known, a reasonable approximation thereof by the Company) when the same
      shall take place. Such notice shall also specify the date on which the holders
      of Common Stock shall be entitled to receive such dividend, distribution, or
      subscription rights or to exchange their Common Stock for stock or other
      securities or property deliverable upon such reorganization, reclassification,
      consolidation, merger, sale, dissolution, liquidation, or winding-up, as the
      case may be. Such notice shall be given at least 15 days prior to the record
      date or the date on which the Company's books are closed in respect thereto.
      Failure to give any such notice or any defect therein shall not affect the
      validity of the proceedings referred to in clauses (i), (ii), (iii) and (iv)
      above.

     

    (i)  Certain
      Events. If any event occurs of the type
      contemplated by the adjustment provisions of this Paragraph 4 but not expressly
      provided for by such provisions, the Company will give notice of such event
      as
      provided in Paragraph 4(e) hereof, and the Company's Board of Directors will
      make an appropriate adjustment in the Exercise Price and the number of shares
      of
      Common Stock acquirable upon exercise of this Warrant so that the rights of
      the
      Holder shall be neither enhanced nor diminished by such event.

     

    (j)  Withholding
      Taxes. In the event that an adjustment to the
      Exercise Price (or a failure to adjust the Exercise Price) results in a
      constructive distribution to the Holder of the Warrants under Section 305
      of the Internal Revenue Code of 1986, as amended, the Company may withhold,
      to
      the extent required by applicable law, any applicable United States federal
      withholding tax from any subsequent distributions of cash or property made
      to
      the Holder, including any Common Stock issued by the Company upon the exercise
      of this Warrant. 

     

    5.  Issue
      Tax. The issuance of certificates for Warrant
      Shares upon the exercise of this Warrant shall be made without charge to the
      Holder or such shares for any issuance tax or other costs in respect thereof,
      provided that the Company shall not be required to pay any tax which may be
      payable in respect of any transfer involved in the issuance and delivery of
      any
      certificate in a name other than the Holder.

     

    6.  No
      Rights or Liabilities as a Stockholder. This
      Warrant shall not entitle the Holder to any voting rights or other rights as
      a
      stockholder of the Company. No provision of this Warrant, in the absence of
      affirmative action by the Holder to purchase Warrant Shares, and no mere
      enumeration herein of the rights or privileges of the Holder, shall give rise
      to
      any liability of such holder for the Exercise Price or as a stockholder of
      the
      Company, whether such liability is asserted by the Company or by creditors
      of
      the Company.

     

    
      
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    7.  Transfer,
      Exchange, and Replacement of Warrant.

     

    (a)  Transfer.This
      Warrant and the rights granted to the Holder are transferable, in whole or
      in
      part, upon surrender of this Warrant, together with a properly executed
      assignment in the form attached hereto, at the office or agency of the Company
      referred to in Paragraph 7(e) below. Until due presentment for registration
      of transfer on the books of the Company, the Company may treat the registered
      Holder as the owner and Holder for all purposes, and the Company shall not
      be
      affected by any notice to the contrary. 

     

    (b)  Warrant
      Exchangeable for Different Denominations. This
      Warrant is exchangeable, upon the surrender hereof by the Holder at the office
      or agency of the Company referred to in Paragraph 7(e) below, for new Warrants
      of like tenor representing in the aggregate the right to purchase the number
      of
      shares of Common Stock which may be purchased hereunder, each of such new
      Warrants to represent the right to purchase such number of shares as shall
      be
      designated by the Holder at the time of such surrender.

     

    (c)  Replacement
      of Warrant. Upon receipt of evidence reasonably
      satisfactory to the Company of the loss, theft, destruction, or mutilation
      of
      this Warrant and, in the case of any such loss, theft, or destruction, upon
      delivery of an indemnity agreement reasonably satisfactory in form and amount
      to
      the Company, or, in the case of any such mutilation, upon surrender and
      cancellation of this Warrant, the Company, at its expense, will execute and
      deliver, in lieu thereof, a new Warrant of like tenor.

     

    (d)  Cancellation;
      Payment of Expenses. Upon the surrender of this
      Warrant in connection with any transfer, exchange, or replacement as provided
      in
      this Paragraph 7, this Warrant shall be promptly canceled by the Company. The
      Company shall pay all taxes (other than securities transfer taxes) and all
      other
      expenses (other than legal expenses, if any, incurred by the Holder or
      transferees) and charges payable in connection with the preparation, execution,
      and delivery of Warrants pursuant to this Paragraph 7.

     

    (e)  Register.
      The Company shall maintain, at its principal executive offices (or such other
      office or agency of the Company as it may designate by notice to the Holder),
      a
      register for this Warrant, in which the Company 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 and each prior owner of this Warrant.

     

    8.  Notices.
      All notices, requests, and other communications required or permitted to be
      given or delivered hereunder to the Holder shall be in writing, and shall be
      personally delivered, or shall be sent by certified or registered mail or by
      recognized overnight mail courier, postage prepaid and addressed, to such holder
      at the address shown for such holder on the books of the Company, or at such
      other address as shall have been furnished to the Company by notice from such
      Holder. 

     

    
      
        9

      

      
        
        

        
          

        

      

      
        
        

      

       

      All
        notices, requests, and other communications required or permitted to be given
        or
        delivered hereunder to the Company shall be in writing, and shall be personally
        delivered, or shall be sent by certified or registered mail or by recognized
        overnight mail courier, postage prepaid and addressed, to the office of the
        Company at 230 Constitution Drive, Menlo Park, California 94025, Attn: David
        Greenwood, fax no. (650) 473-7701 with copies to Latham & Watkins LLP, 140
        Scott Drive, Menlo Park, California 94025, Attn: Alan C. Mendelson, Esq.,
        fax
        no. (650) 463-2600, or at such other address as shall have been furnished
        to the
        Holder by notice from the Company. Any such notice, request, or other
        communication may be sent by facsimile, but shall in such case be subsequently
        confirmed by a writing personally delivered or sent by certified or registered
        mail or by recognized overnight mail courier as provided above. All notices,
        requests, and other communications shall be deemed to have been given either
        at
        the time of the receipt thereof by the person entitled to receive such notice
        at
        the address of such person for purposes of this Paragraph 8, or, if mailed
        by
        registered or certified mail or with a recognized overnight mail courier
        upon
        deposit with the United States Post Office or such overnight mail courier,
        if
        postage is prepaid and the mailing is properly addressed, as the case may
        be.

    

     

    9.  Governing
      Law.THIS WARRANT SHALL BE GOVERNED BY AND
      CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE APPLICABLE TO
      AGREEMENTS MADE AND TO BE PERFORMED IN THE STATE OF DELAWARE (WITHOUT REGARD
      TO
      PRINCIPLES OF CONFLICT OF LAWS). BOTH PARTIES IRREVOCABLY CONSENT TO THE
      EXCLUSIVE JURISDICTION OF THE UNITED STATES FEDERAL COURTS AND THE STATE COURTS
      LOCATED IN DELAWARE WITH RESPECT TO ANY SUIT OR PROCEEDING BASED ON OR ARISING
      UNDER THIS AGREEMENT, THE AGREEMENTS ENTERED INTO IN CONNECTION HEREWITH OR
      THE
      TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY AND IRREVOCABLY AGREE THAT ALL
      CLAIMS IN RESPECT OF SUCH SUIT OR PROCEEDING MAY BE DETERMINED IN SUCH COURTS.
      BOTH PARTIES IRREVOCABLY WAIVE THE DEFENSE OF AN INCONVENIENT FORUM TO THE
      MAINTENANCE OF SUCH SUIT OR PROCEEDING. BOTH PARTIES FURTHER AGREE THAT SERVICE
      OF PROCESS UPON A PARTY MAILED BY FIRST CLASS MAIL SHALL BE DEEMED IN EVERY
      RESPECT EFFECTIVE SERVICE OF PROCESS UPON THE PARTY IN ANY SUCH SUIT OR
      PROCEEDING. NOTHING HEREIN SHALL AFFECT EITHER PARTY'S RIGHT TO SERVE PROCESS
      IN
      ANY OTHER MANNER PERMITTED BY LAW. BOTH PARTIES AGREE THAT A FINAL
      NON-APPEALABLE JUDGMENT IN ANY SUCH SUIT OR PROCEEDING SHALL BE CONCLUSIVE
      AND
      MAY BE ENFORCED IN OTHER JURISDICTIONS BY SUIT ON SUCH JUDGMENT OR IN ANY OTHER
      LAWFUL MANNER. 

     

    10.  Miscellaneous.

     

    (a)  Amendments.
      This Warrant and any provision hereof may only be amended by an instrument
      in
      writing signed by the Company and the Holder.

     

    (b)  Descriptive
      Headings. The descriptive headings of the several
      paragraphs of this Warrant are inserted for purposes of reference only, and
      shall not affect the meaning or construction of any of the provisions
      hereof.

     

    
      
        10

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    (c)  Cashless
      Exercise. This Warrant may be exercised by presentation and
      surrender of this Warrant to the Company at its principal executive offices
      with
      a written notice of the holder's intention to effect a cashless exercise,
      including a calculation of the number of shares of Common Stock to be issued
      upon such exercise in accordance with the terms hereof, or in connection with
      a
      Company-Elected-Conversion (a "Cashless Exercise"). In the event of a Cashless
      Exercise, the Holder shall be entitled to receive a certificate for the number
      of Warrant Shares equal to the quotient obtained by dividing [(A-B) (X)] by
      (A),
      where:

     

    

    (A)
      = the
      closing price on the trading day immediately preceding the date of such
      election; provided, however, that if the Cashless Exercise is in
      connection with a Company-Elected Conversion, “A” in the formula above shall
      equal the volume-weighted average price of the Company’s common stock as
      reported by Bloomberg L.P., or any successor performing similar functions for
      the five (5) trading days beginning the day immediately following the date
      of
      the Company-Elected Conversion.

    

    (B)
      = the
      Exercise Price of this Warrant, as adjusted; and

    

    (X)
      = the
      number of Warrant Shares issuable upon exercise of this Warrant in accordance
      with the terms of this Warrant by means of a cash exercise rather than a
      cashless exercise.

     

    (d)  Remedies.
      The Company acknowledges that a breach by it of its obligations hereunder will
      cause irreparable harm to the Holder by vitiating the intent and purpose of
      the
      transactions contemplated hereby. Accordingly, the Company acknowledges that
      the
      remedy at law for a breach of its obligations under this Warrant will be
      inadequate and agrees, in the event of a breach or threatened breach by the
      Company of the provisions of this Warrant, that the Holder shall be entitled,
      in
      addition to all other available remedies in law or in equity, to an injunction
      or injunctions to prevent or cure any breaches of the provisions of this
      Agreement and to enforce specifically the terms and provisions of this Warrant,
      without the necessity of showing economic loss and without any bond or other
      security being required.

     

    [REMAINDER
      OF THIS PAGE INTENTIONALLY LEFT BLANK]

     

    
      
        11

      

      
        
        

        
          

        

      

      
        
        

      

    

    EXHIBIT
      4.4

     

      IN
        WITNESS WHEREOF, the Company has caused this Warrant to be signed by
        its duly authorized officer.

       

      
        	 	 	 
	 	GERON
                CORPORATION
	 
 	 
 	 
 
	 	By:  	 
	 	
                
                  

                

                Name: 
                  David L. Greenwood

              
	 	
                Title:    Executive Vice President
                  and 

                    
Chief
                  Financial Officer

              
	 	 
	 	 
	 	Dated as of March 1,
                2007

      

                                                                                                                                        
        

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

      FORM
        OF EXERCISE AGREEMENT

       

      Dated:
        ________ __, 200_

       

      To:
        GERON
        CORPORATION

       

      The
        undersigned, pursuant to the provisions set forth in the Warrant attached
        hereto, hereby agrees to purchase ________ shares of Common Stock covered
        by
        such Warrant, and makes payment herewith in full therefor at the price per
        share
        provided by such Warrant in cash or by certified or official bank check in
        the
        amount of, or by surrender of securities issued by the Company (including
        a
        portion of the Warrant) having a market value (in the case of a portion of
        this
        Warrant, determined in accordance with Paragraph 10(c) of the Warrant) equal
        to
        $_________. Please issue a certificate or certificates for such shares of
        Common
        Stock in the name of and pay any cash for any fractional share to:

      
         

        

          
            	 	
                    Name:
                      

                  
	 	
                    Signature:
                      

                  
	 	
                    Address:

                  
	 	
                  
	 	 
	 	 
	 	
                    Note:
                      The
                      above signature should correspond exactly with the name on
                      the face of the
                      Warrant attached hereto.

                  

          

        

         

        and,
          if
          said number of shares of Common Stock shall not be all the shares purchasable
          under the Warrant attached hereto, a new Warrant is to be issued in the
          name of
          said undersigned covering the balance of the shares purchasable thereunder
          less
          any fraction of a share paid in cash.

         

        
          
            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

        FORM
          OF ASSIGNMENT

         

        FOR
          VALUE
          RECEIVED, the undersigned hereby sells, assigns, and transfers all the
          rights of
          the undersigned under the Warrant attached hereto, with respect to the
          number of
          shares of Common Stock covered thereby set forth hereinbelow, to:

        

          
            	
                    Name
                      of Assignee

                  	
                    Address

                  	
                    No
                      of Shares

                  
	 	 	 
	 	 	 

          

        

         

         
          ,
          and
          hereby irrevocably constitutes and appoints
          _____________________________________ as agent and attorney-in-fact to
          transfer
          said Warrant on the books of the within-named corporation, with full power
          of
          substitution in the premises.

         

        

          
            	
                    Dated:
                      ________ __, 200_

                  
	
                    In
                      the presence of:

                  
	
                    _________________________

                  

          

        

         

        
          
            	 	
                    Name:
                      

                  
	 	
                    Signature:

                  
	 	Title
                    of Signing Officer or Agent (if any):
	 	
                    Address:

                  
	 	
                  
	 	 
	 	 
	 	
                    Note:
                      The
                      above signature should correspond exactly with the name on
                      the face of the
                      Warrant attached
                      hereto.Exhibit 10.1

    EXHIBIT
      10.1

     

    
 

    GERON
      CORPORATION

     

    2002
      EQUITY INCENTIVE PLAN

    (AS
      AMENDED AND RESTATED)

     

    1.  Purposes
      of the Plan.    The
      purposes of the Geron Corporation 2002 Equity Incentive Plan are to attract
      and
      retain the best available personnel for positions of substantial responsibility,
      to provide additional incentive to Employees, Directors and Consultants and
      to
      promote the success of the Company’s business. Options granted under the Plan
      may be Incentive Stock Options or Non-Qualified Stock Options, as determined
      by
      the Administrator at the time of grant. Stock Purchase Rights may also be
      granted under the Plan. 

     

    2.  Definitions.
      As used
      herein, the following definitions shall apply: 

     

    (a)  “Acquisition”
means
      (1) a
      dissolution, liquidation or sale of all or substantially all of the assets
      of
      the Company; (2) a merger or consolidation in which the Company is not the
      surviving corporation; or (3) a reverse merger in which the Company is the
      surviving corporation but the shares of the Company’s common stock outstanding
      immediately preceding the merger are converted by virtue of the merger into
      other property, whether in the form of securities, cash or
      otherwise.

     

    (b)  “Administrator”
means
      the Board or the Committee responsible for conducting the general administration
      of the Plan, as applicable, in accordance with Section 4
      hereof.

     

    (c)  “Applicable
      Laws”
means
      the requirements relating to the administration of stock option plans under
      U.S.
      state corporate laws, U.S. federal and state securities laws, the Code, any
      stock exchange or quotation system on which the Common Stock is listed or quoted
      and the applicable laws of any foreign country or jurisdiction where Options
      or
      Stock Purchase Rights are granted under the Plan.

     

    (d)  “Board”
means
      the Board of Directors of the Company.

     

    (e)  “Code”
means
      the Internal Revenue Code of 1986, as amended, or any successor statute or
      statutes thereto. Reference to any particular Code section shall include any
      successor section.

     

    (f)  “Committee”
means
      a
      committee appointed by the Board in accordance with Section 4
      hereof.

     

    (g)  “Common
      Stock”
means
      the Common Stock of the Company.

     

    (h)  “Company”
means
      Geron Corporation, a Delaware corporation.

     

    (i)  “Consultant”
means
      any consultant or adviser if: (i) the consultant or adviser renders bona
      fide services to the Company or any Parent or Subsidiary of the Company;
      (ii) the services rendered by the consultant or adviser are not in
      connection with the offer or sale of securities in a capital-raising transaction
      and do not directly or indirectly promote or maintain a market for the Company’s
      securities; and (iii) the consultant or adviser is a natural person who has
      contracted directly with the Company or any Parent or Subsidiary of the Company
      to render such services.

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    (j)  “Director”
means
      a
      member of the Board.

     

    (k)  “Employee”
means
      any person, including an Officer or Director, who is an employee (as defined
      in
      accordance with Section 3401(c) of the Code) of the Company or any Parent or
      Subsidiary of the Company. A Service Provider shall not cease to be an Employee
      (i) during any leave of absence approved by the Company or (ii) upon
      any transfer between locations of the Company or between the Company, its
      Parent, any Subsidiary, or any successor. For purposes of Incentive Stock
      Options, no such leave may exceed ninety (90) days, unless reemployment upon
      expiration of such leave is guaranteed by statute or contract. Neither service
      as a Director nor payment of a director’s fee by the Company shall be
      sufficient, by itself, to constitute “employment” by the Company.

     

    (l)  Equity
      Restructuring”
means
      a
      non-reciprocal transaction between the Company and its stockholders, such as
      a
      stock dividend, stock split, spin-off, rights offering or recapitalization
      through a large, nonrecurring cash dividend, that affects the shares of Common
      Stock (or other securities of the Company) or the share price of Common Stock
      (or other securities of the Company) and causes a change in the per share value
      of the Common Stock underlying outstanding awards granted under the
      Plan.

     

    (m)  “Exchange
      Act”
means
      the Securities Exchange Act of 1934, as amended, or any successor statute or
      statutes thereto. Reference to any particular Exchange Act section shall include
      any successor section.

     

    (n)  “Fair
      Market Value”
means,
      as of any date, the value of a share of Common Stock determined as follows:
      

     

    (i)  If
      the
      Common Stock is listed on any established stock exchange or a national market
      system, its Fair Market Value shall be the closing sales price for a share
      of
      such stock (or the closing bid, if no sales were reported) as quoted on such
      exchange or system for such date, or if no bids or sales were reported for
      such
      date, then the closing sales price (or the closing bid, if no sales were
      reported) on the trading date immediately prior to such date during which a
      bid
      or sale occurred, in each case, as reported in The
      Wall Street Journal
      or such
      other source as the Administrator deems reliable;

     

    (ii)  If
      the
      Common Stock is regularly quoted by a recognized securities dealer but selling
      prices are not reported, its Fair Market Value shall be the mean between the
      high bid and low asked prices for a share of the Common Stock on such date,
      or
      if no closing bid and asked prices were reported for such date, the date
      immediately prior to such date during which closing bid and asked prices were
      quoted for such Common Stock, in each case, as reported in The
      Wall Street Journal
      or such
      other source as the Administrator deems reliable; or

     

    (iii)  In
      the
      absence of an established market for the Common Stock, the Fair Market Value
      thereof shall be determined in good faith by the Administrator.

     

    
      
        
        

      

      
        2

        
          

        

      

      
        
        

      

    

    (o)  “Holder”
means
      a
      person who has been granted or awarded an Option or Stock Purchase Right or
      who
      holds Shares acquired pursuant to the exercise of an Option or Stock Purchase
      Right.

     

    (p)  “Incentive
      Stock Option”
means
      an Option intended to qualify as an incentive stock option within the meaning
      of
      Section 422 of the Code and which is designated as an Incentive Stock
      Option by the Administrator.

     

    (q)  “Independent
      Director”
means
      a
      Director who is not an Employee of the Company.

     

    (r)  “Non-Qualified
      Stock Option”
means
      an Option (or portion thereof) that is not designated as an Incentive Stock
      Option by the Administrator, or which is designated as an Incentive Stock Option
      by the Administrator but fails to qualify as an incentive stock option within
      the meaning of Section 422 of the Code.

     

    (s)  “Officer”
means
      a
      person who is an officer of the Company within the meaning of Section 16 of
      the Exchange Act and the rules and regulations promulgated
      thereunder.

     

    (t)  “Option”
means
      a
      stock option granted pursuant to the Plan.

     

    (u)  “Option
      Agreement”
means
      a
      written agreement between the Company and a Holder evidencing the terms and
      conditions of an individual Option grant. The Option Agreement is subject to
      the
      terms and conditions of the Plan.

     

    (v)  “Parent”
means
      any corporation, whether now or hereafter existing (other than the Company),
      in
      an unbroken chain of corporations ending with the Company if each of the
      corporations other than the last corporation in the unbroken chain owns stock
      possessing more than fifty percent of the total combined voting power of all
      classes of stock in one of the other corporations in such chain.

     

    (w)  “Plan”
means
      the Geron Corporation 2002
      Equity Incentive Plan, as may be amended from time to time.

     

    (x)  “Qualified
      Domestic Relations Order”
means
      a
      domestic relations order as defined by the Code or Title I of the Employee
      Retirement Income Security Act of 1974, as amended, or the rules
      thereunder.

     

    (y)  “Restricted
      Stock”
means
      Shares acquired pursuant to the exercise of an unvested Option in accordance
      with Section 10(h) below or pursuant to a Stock Purchase Right granted under
      Section 12 below.

     

    (z)  “Rule
      16b-3”
means
      that certain Rule 16b-3 under the Exchange Act, as such Rule may be amended
      from
      time to time.

     

    (aa)  “Section
      16(b)”
means
      Section 16(b) of the Exchange Act, as such Section may be amended from time
      to time.

     

    
      
        
        

      

      
        3

        
          

        

      

      
        
        

      

    

    (bb)  “Securities
      Act”
means
      the Securities Act of 1933, as amended, or any successor statute or statutes
      thereto. Reference to any particular Securities Act section shall include any
      successor section.

     

    (cc)  “Service
      Provider”
means
      an Employee, Director or Consultant. 

     

    (dd)  “Share”
means
      a
      share of Common Stock, as adjusted in accordance with Section 13
      below.

     

    (ee)  “Stock
      Purchase Right”
means
      a
      right to purchase Common Stock pursuant to Section 12 below.

     

    (ff)  “Subsidiary”
means
      any corporation, whether now or hereafter existing (other than the Company),
      in
      an unbroken chain of corporations beginning with the Company if each of the
      corporations other than the last corporation in the unbroken chain owns stock
      possessing more than fifty percent of the total combined voting power of all
      classes of stock in one of the other corporations in such chain.

     

    3.  Stock
      Subject to the Plan.
      Subject
      to the provisions of Section 13 of the Plan, the shares of stock subject to
      Options or Stock Purchase Rights shall be Common Stock, initially shares of
      the
      Company’s Common Stock. Subject to the provisions of Section 13 of the
      Plan, the maximum aggregate number of Shares which may be issued upon exercise
      of such Options or Stock Purchase Rights is five million (5,000,000) Shares,
      plus an annual increase to be added on each anniversary date of the Board’s
      adoption of the Plan during the term of the Plan equal to the least of (i)
      two
      million (2,000,000) Shares, (ii) four percent (4%) of the Company’s outstanding
      Shares on such date or (iii) a lesser amount determined by the Board. Shares
      issued upon exercise of Options or Stock Purchase Rights may be authorized
      but
      unissued, or reacquired Common Stock. If an Option or Stock Purchase Right
      expires or becomes unexercisable without having been exercised in full, the
      unpurchased Shares which were subject thereto shall become available for future
      grant or sale under the Plan (unless the Plan has terminated). Shares which
      are
      delivered by the Holder or withheld by the Company upon the exercise of an
      Option or Stock Purchase Right under the Plan, in payment of the exercise price
      thereof or tax withholding thereon, may again be optioned, granted or awarded
      hereunder, subject to the limitations of this Section 3. If Shares of Restricted
      Stock are repurchased by the Company at their original purchase price, such
      Shares shall become available for future grant under the Plan. Notwithstanding
      the provisions of this Section 3, no Shares may again be optioned, granted
      or
      awarded if such action would cause an Incentive Stock Option to fail to qualify
      as an Incentive Stock Option under Code Section 422.

     

    4.  Administration
      of the Plan.

     

    (a)  Administrator.
      A
      Committee of the Board shall administer the Plan and the Committee shall consist
      solely of two or more Independent Directors each of whom is both an “outside
      director,” within the meaning of Section 162(m) of the Code, and a “non-employee
      director” within the meaning of Rule 16b-3. Notwithstanding the foregoing, the
      Board or the Committee may (i) delegate to a committee of one or more members
      of
      the Board who are not Independent Directors the authority to grant, and
      otherwise act as Administrator hereunder with respect to, awards under the
      Plan
      to eligible persons who are either (1) not then “covered employees,” within the
      meaning of Section 162(m) of the Code and are not expected to be “covered
      employees” at the time of recognition of income resulting from such award or (2)
      not persons with respect to whom the Company wishes to comply with Section
      162(m) of the Code and/or (ii) delegate to a committee of one or more members
      of
      the Board who are not “non-employee directors,” within the meaning of Rule
      16b-3, the authority to grant awards under the Plan to eligible persons who
      are
      not then subject to Section 16 of the Exchange Act. Appointment of Committee
      members shall be effective upon acceptance of appointment. Committee members
      may
      resign at any time by delivering written notice to the Board. Vacancies in
      the
      Committee may only be filled by the Board.

     

    
      
        
        

      

      
        4

        
          

        

      

      
        
        

      

    

    (b)  Powers
      of the Administrator.
      Subject
      to the provisions of the Plan and the specific duties delegated by the Board
      to
      such Committee, and subject to the approval of any relevant authorities, the
      Administrator shall have the authority in its sole discretion:

     

    (i)  to
      determine the Fair Market Value;

     

    (ii)  to
      select
      the Service Providers to whom Options and Stock Purchase Rights may from time
      to
      time be granted hereunder;

     

    (iii)  to
      determine the number of Shares to be covered by each such award granted
      hereunder;

     

    (iv)  to
      approve forms of agreement for use under the Plan;

     

    (v)  to
      determine the terms and conditions of any Option or Stock Purchase Right granted
      hereunder (such terms and conditions include, but are not limited to, the
      exercise price, the time or times when Options or Stock Purchase Rights may
      vest
      or be exercised (which may be based on performance criteria), any vesting
      acceleration or waiver of forfeiture restrictions, and any restriction or
      limitation regarding any Option or Stock Purchase Right or the Common Stock
      relating thereto, based in each case on such factors as the Administrator,
      in
      its sole discretion, shall determine) and amend such terms and conditions
      following the grant of such Options and Stock Purchase Rights
      hereunder;

     

    (vi)  to
      determine whether to offer to buyout a previously granted Option as provided
      in
      subsection 10(i) and to determine the terms and conditions of such offer
      and buyout (including whether payment is to be made in cash or
      Shares);

     

    (vii)  to
      prescribe, amend and rescind rules and regulations relating to the Plan,
      including rules and regulations relating to sub-plans established for the
      purpose of qualifying for preferred tax treatment under foreign tax
      laws;

     

    (viii)  to
      allow
      Holders to satisfy withholding tax obligations by electing to have the Company
      withhold from the Shares to be issued upon exercise of an Option or Stock
      Purchase Right that number of Shares having a Fair Market Value equal to the
      minimum amount required to be withheld based on the statutory withholding rates
      for federal and state tax purposes that apply to supplemental taxable income.
      The Fair Market Value of the Shares to be withheld shall be determined on the
      date that the amount of tax to be withheld is to be determined. All elections
      by
      Holders to have Shares withheld for this purpose shall be made in such form
      and
      under such conditions as the Administrator may deem necessary or advisable;
      

     

    
      
        
        

      

      
        5

        
          

        

      

      
        
        

      

    

    (ix)  to
      amend
      the Plan or any Option or Stock Purchase Right granted under the Plan as
      provided in Section 15; and

     

    (x)  to
      construe and interpret the terms of the Plan and awards granted pursuant to
      the
      Plan and to exercise such powers and perform such acts as the Administrator
      deems necessary or desirable to promote the best interests of the Company which
      are not in conflict with the provisions of the Plan.

     

    (c)  Effect
      of Administrator’s Decision.
      All
      decisions, determinations and interpretations of the Administrator shall be
      final and binding on all Holders. 

     

    5.  Eligibility.
      Non-Qualified Stock Options and Stock Purchase Rights may be granted to Service
      Providers. Incentive Stock Options may be granted only to Employees. If
      otherwise eligible, an Employee, Director or Consultant who has been granted
      an
      Option or Stock Purchase Right may be granted additional Options or Stock
      Purchase Rights. 

     

    6.  Limitations.

     

    (a)  Each
      Option shall be designated by the Administrator in the Option Agreement as
      either an Incentive Stock Option or a Non-Qualified Stock Option. However,
      notwithstanding such designations, to the extent that the aggregate Fair Market
      Value of Shares subject to a Holder’s Incentive Stock Options and other
      incentive stock options granted by the Company, any Parent or Subsidiary, which
      become exercisable for the first time during any calendar year (under all plans
      of the Company or any Parent or Subsidiary) exceeds $100,000, such excess
      Options or other options shall be treated as Non-Qualified Stock
      Options.

     

    For
      purposes of this Section 6(a), Incentive Stock Options shall be taken into
      account in the order in which they were granted, and the Fair Market Value
      of
      the Shares shall be determined as of the time of grant.

     

    (b)  Neither
      the Plan, any Option nor any Stock Purchase Right shall confer upon a Holder
      any
      right with respect to continuing the Holder’s employment or consulting
      relationship with the Company, nor shall they interfere in any way with the
      Holder’s right or the Company’s right to terminate such employment or consulting
      relationship at any time, with or without cause.

     

    (c)  No
      Service Provider shall be granted, in any calendar year, Options or Stock
      Purchase Rights to purchase more than 750,000 Shares. The foregoing limitation
      shall be adjusted proportionately in connection with any change in the Company’s
      capitalization as described in Section 13. For purposes of this Section
      6(c), if an Option is canceled in the same calendar year it was granted (other
      than in connection with a transaction described in Section 13), the
      canceled Option will be counted against the limit set forth in this
      Section 6(c). For this purpose, if the exercise price of an Option is
      reduced, the transaction shall be treated as a cancellation of the Option and
      the grant of a new Option.

     

    
      
        
        

      

      
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    7.  Term
      of Plan.The
      Plan
      shall become effective upon its initial adoption by the Board and shall continue
      in effect until it is terminated under Section 15 of the Plan. No Options
      or Stock Purchase Rights may be issued under the Plan after the tenth (10th)
      anniversary of the earlier of (i) the date upon which the Plan is adopted by
      the
      Board or (ii) the date the Plan is approved by the stockholders.

     

    8.  Term
      of Option.
      The
      term of each Option shall be stated in the Option Agreement; provided,
      however,
      that
      the term shall be no more than ten (10) years from the date of grant thereof.
      In
      the case of an Incentive Stock Option granted to a Holder who, at the time
      the
      Option is granted, owns (or is treated as owning under Code Section 424) stock
      representing more than ten percent (10%) of the voting power of all classes
      of
      stock of the Company or any Parent or Subsidiary, the term of the Option shall
      be five (5) years from the date of grant or such shorter term as may be provided
      in the Option Agreement.

     

    9.  Option
      Exercise Price and Consideration.

     

    (a)  Except
      as
      provided in Section 13, the per share exercise price for the Shares to be issued
      upon exercise of an Option shall be such price as is determined by the
      Administrator, but in no event less than the par value per Share, and in the
      case of an Incentive Stock Option

     

    (i)  granted
      to an Employee who, at the time of grant of such Option, owns (or is treated
      as
      owning under Code Section 424) stock representing more than ten percent (10%)
      of
      the voting power of all classes of stock of the Company or any Parent or
      Subsidiary, the per Share exercise price shall be no less than one hundred
      ten
      percent (110%) of the Fair Market Value per Share on the date of
      grant.

     

    (ii)  granted
      to any other Employee, the per Share exercise price shall be no less than one
      hundred percent (100%) of the Fair Market Value per Share on the date of
      grant.

     

    (b)  Notwithstanding
      the foregoing, Options may be granted with a per Share exercise price other
      than
      as required above pursuant to a merger or other corporate
      transaction.

     

    (c)  The
      consideration to be paid for the Shares to be issued upon exercise of an Option,
      including the method of payment, shall be determined by the Administrator (and,
      in the case of an Incentive Stock Option, shall be determined at the time of
      grant). Such consideration may consist of (1) cash, (2) check, (3)
      with the consent of the Administrator, a full recourse promissory note bearing
      interest (at no less than such rate as shall then preclude the imputation of
      interest under the Code) and payable upon such terms as may be prescribed by
      the
      Administrator, (4) with the consent of the Administrator, other Shares
      which (x) in the case of Shares acquired from the Company, have been owned
      by the Holder for more than six (6) months on the date of surrender, and
      (y) have a Fair Market Value on the date of surrender equal to the
      aggregate exercise price of the Shares as to which such Option shall be
      exercised, (5) with the consent of the Administrator, surrendered Shares
      then issuable upon exercise of the Option having a Fair Market Value on the
      date
      of exercise equal to the aggregate exercise price of the Option or exercised
      portion thereof, (6) property of any kind which constitutes good and
      valuable consideration, (7) with the consent of the Administrator, delivery
      of a notice that the Holder has placed a market sell order with a broker with
      respect to Shares then issuable upon exercise of the Options and that the broker
      has been directed to pay a sufficient portion of the net proceeds of the sale
      to
      the Company in satisfaction of the Option exercise price, provided,
      that
      payment of such proceeds is then made to the Company upon settlement of such
      sale, or (8) with the consent of the Administrator, any combination of the
      foregoing methods of payment.

     

    
      
        
        

      

      
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    10.  Exercise
      of Option.

     

    (a)  Vesting;
      Fractional Exercises.
      Except
      as provided in Section 13, Options granted hereunder shall be vested and
      exercisable according to the terms hereof at such times and under such
      conditions as determined by the Administrator and set forth in the Option
      Agreement, as may be amended from time to time. An Option may not be exercised
      for a fraction of a Share.

     

    (b)  Deliveries
      upon Exercise.
      All or
      a portion of an exercisable Option shall be deemed exercised upon delivery
      of
      all of the following to the Secretary of the Company or his or her
      office:

     

    (i)  A
      written
      or electronic notice complying with the applicable rules established by the
      Administrator stating that the Option, or a portion thereof, is exercised.
      The
      notice shall be signed by the Holder or other person then entitled to exercise
      the Option or such portion of the Option;

     

    (ii)  Such
      representations and documents as the Administrator, in its sole discretion,
      deems necessary or advisable to effect compliance with Applicable Laws. The
      Administrator may, in its sole discretion, also take whatever additional actions
      it deems appropriate to effect such compliance, including, without limitation,
      placing legends on share certificates and issuing stop transfer notices to
      agents and registrars;

     

    (iii)  Upon
      the
      exercise of all or a portion of an unvested Option pursuant to Section 10(h),
      a
      Restricted Stock purchase agreement in a form determined by the Administrator
      and signed by the Holder or other person then entitled to exercise the Option
      or
      such portion of the Option; and

     

    (iv)  In
      the
      event that the Option shall be exercised pursuant to Section 10(f) by any person
      or persons other than the Holder, appropriate proof of the right of such person
      or persons to exercise the Option.

     

    (c)  Conditions
      to Delivery of Share Certificates.
      The
      Company shall not be required to issue or deliver any certificate or
      certificates for Shares purchased upon the exercise of any Option or portion
      thereof prior to fulfillment of all of the following conditions:

     

    (i)  The
      admission of such Shares to listing on all stock exchanges on which such class
      of stock is then listed;

     

    (ii)  The
      completion of any registration or other qualification of such Shares under
      any
      state or federal law, or under the rulings or regulations of the Securities
      and
      Exchange Commission or any other governmental regulatory body which the
      Administrator shall, in its sole discretion, deem necessary or
      advisable;

     

    
      
        
        

      

      
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    (iii)  The
      obtaining of any approval or other clearance from any state or federal
      governmental agency which the Administrator shall, in its sole discretion,
      determine to be necessary or advisable;

     

    (iv)  The
      lapse
      of such reasonable period of time following the exercise of the Option as the
      Administrator may establish from time to time for reasons of administrative
      convenience; and

     

    (v)  The
      receipt by the Company of full payment for such Shares, including payment of
      any
      applicable withholding tax, which in the sole discretion of the Administrator
      may be in the form of consideration used by the Holder to pay for such Shares
      under Section 9(c).

     

    (d)  Termination
      of Relationship as a Service Provider.
      If a
      Holder ceases to be a Service Provider other than by reason of the Holder’s
      total and permanent disability (as defined in Section 22(e)(3) of the Code)
      or
      death, such Holder may exercise his or her Option within such period of time
      as
      is specified in the Option Agreement to the extent that the Option is vested
      on
      the date of termination. In the absence of a specified time in the Option
      Agreement, the Option shall remain exercisable for three (3) months following
      the Holder’s termination (but in no event later than the expiration of the term
      of such Option as set forth in the Option Agreement). If, on the date of
      termination, the Holder is not vested as to his or her entire Option, the Shares
      covered by the unvested portion of the Option immediately cease to be issuable
      under the Option and shall again become available for issuance under the Plan.
      If and to the extent, after termination, the Holder does not exercise his or
      her
      Option within the time period specified herein, the Option shall terminate,
      and
      the Shares covered by such Option shall again become available for issuance
      under the Plan.

     

    (e)  Disability
      of Holder.
      If a
      Holder ceases to be a Service Provider as a result of the Holder's total and
      permanent disability (as defined in Section 22(e)(3) of the Code), the Holder
      may exercise his or her Option within twenty-four (24) months following the
      Holder's termination (but in no event later than the expiration of the term
      of
      such Option as set forth in the Option Agreement) and such Option shall be
      exercisable during such period for the number of Shares subject to the Option
      with respect to which the right to exercise was (i) already accrued as of the
      Holder's termination and (ii) would have accrued had the Holder remained a
      Service Provider continuously for thirty-six (36) months (or such lesser period
      of time as is determined by the Board) after the date of Holder's
      termination.  If, on the date of termination, the Holder is not vested as
      to his or her entire Option, the Shares covered by the unvested portion of
      the
      Option (determined after taking into account the accelerated exercisability
      provided for in this Section 10(e)) shall immediately cease to be issuable
      under
      the Option and shall again become available for issuance under the Plan. 
If, and to the extent, after termination, the Holder does not exercise his
      or
      her Option within the time specified herein, the Option shall terminate, and
      the
      Shares covered by such Option shall again become available for issuance under
      the Plan.

     

    
      
        
        

      

      
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    (f)  Death
      of Holder.
      If a
      Holder dies while a Service Provider, the Option may be exercised within
      twenty-four (24) months following the Holder’s termination by the Holder’s
      estate or by a person who acquires the right to exercise the Option by bequest
      or inheritance (but in no event later than the expiration of the term of such
      Option as set forth in the Option Agreement) and such Option shall be
      exercisable during such period for the number of Shares subject to the Option
      with respect to which the right to exercise was (i) already accrued as of the
      Holder’s termination and (ii) would have accrued had the Holder remained a
      Service Provider continuously for thirty-six (36) months (or such lesser period
      of time as is determined by the Board) after the date of Holder’s termination.
      If, at the time of death, the Holder is not vested as to his or her entire
      Option, the Shares covered by the unvested portion of the Option (determined
      after taking into account the accelerated exercisability provided for in this
      Section 10(f)) shall immediately cease to be issuable under the Option and
      shall
      again become available for issuance under the Plan. The Option may be exercised
      by the executor or administrator of the Holder’s estate or, if none, by the
      person(s) entitled to exercise the Option under the Holder’s will or the laws of
      descent or distribution. If, and to the extent, the Option is not so exercised
      within the time specified herein, the Option shall terminate, and the Shares
      covered by such Option shall again become available for issuance under the
      Plan.

     

    If
      a
      Holder dies within three (3) months after termination as a Service Provider
      (other than as a result of the Holder’s disability), the Option may be exercised
      within six (6) months following the date of death (but in no event later than
      the expiration of the term of such Option as set forth in the Option Agreement),
      by the Holder’s estate or by a person who acquires the right to exercise the
      Option by bequest or inheritance, but only to the extent the right to exercise
      such Option had accrued as of the date of death. 

     

    (g)  Regulatory
      Extension.
      A
      Holder’s Option Agreement may provide that if the exercise of the Option
      following the termination of the Holder’s status as a Service Provider (other
      than upon the Holder’s death or Disability) would be prohibited at any time
      because the issuance of shares would violate the registration requirements
      under
      the Securities Act or because the sale of Shares on or after exercise would
      be
      inconsistent with the terms of the Company's insider trading policy, then the
      Option shall terminate on the earlier of (i) the expiration of the term of
      the
      Option set forth in Section 8 or (ii) the expiration of a period of three (3)
      months after the termination of the Holder’s status as a Service Provider during
      which the exercise of the Option would not be in violation of such registration
      requirements or inconsistent with such insider trading policy, as
      applicable.

     

    (h)  Early
      Exercisability.
      The
      Administrator may provide in the terms of a Holder’s Option Agreement that the
      Holder may, at any time before the Holder’s status as a Service Provider
      terminates, exercise the Option in whole or in part prior to the full vesting
      of
      the Option; provided,
      however,
      that
      Shares acquired upon exercise of an Option which has not fully vested may be
      subject to any forfeiture, transfer or other restrictions as the Administrator
      may determine in its sole discretion. 

     

    (i)  Buyout
      Provisions.
      The
      Administrator may at any time offer to buyout for a payment in cash or Shares,
      an Option previously granted, based on such terms and conditions as the
      Administrator shall establish and communicate to the Holder at the time that
      such offer is made. 

     

    
      
        
        

      

      
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    11.  Non-Transferability
      of Options and Stock Purchase Rights.
      Options
      and Stock Purchase Rights may not be sold, pledged, assigned, hypothecated,
      transferred, or disposed of in any manner other than by will or by the laws
      of
      descent or distribution and may be exercised, during the lifetime of the Holder,
      only by the Holder.
      Notwithstanding the preceding sentence, a Non-Qualified Stock Option may be
      assigned in accordance with the terms of a Qualified Domestic Relations Order.
      The assigned Option may only be exercised by the person or persons who acquire
      a
      proprietary interest in the Option pursuant to such Qualified Domestic Relations
      Order. The terms applicable to the assigned Option (or portion thereof) shall
      be
      the same as those in effect for the Option immediately prior to such assignment
      and shall be set forth in such documents issued to the assignee as the
      Administrator may deem appropriate.

     

    12.  Stock
      Purchase Rights.

     

    (a)  Rights
      to Purchase.
      Stock
      Purchase Rights may be issued either alone, in addition to, or in tandem with
      Options granted under the Plan and/or cash awards made outside of the Plan.
      After the Administrator determines that it will offer Stock Purchase Rights
      under the Plan, it shall advise the offeree in writing of the terms, conditions
      and restrictions related to the offer, including the number of Shares that
      such
      person shall be entitled to purchase, the price to be paid, and the time within
      which such person must accept such offer. The offer shall be accepted by
      execution of a Restricted Stock purchase agreement in the form determined by
      the
      Administrator.

     

    (b)  Repurchase
      Right.
      Unless
      the Administrator determines otherwise, the Restricted Stock purchase agreement
      shall grant the Company the right to repurchase Shares acquired upon exercise
      of
      a Stock Purchase Right upon the termination of the purchaser’s status as a
      Service Provider for any reason. The purchase price for Shares repurchased
      by
      the Company pursuant to such repurchase right and the rate at which such
      repurchase right shall lapse shall be determined by the Administrator in its
      sole discretion, and shall be set forth in the Restricted Stock purchase
      agreement.

     

    (c)  Other
      Provisions.
      The
      Restricted Stock purchase agreement shall contain such other terms, provisions
      and conditions not inconsistent with the Plan as may be determined by the
      Administrator in its sole discretion.

     

    (d)  Rights
      as a Shareholder.
      Once
      the Stock Purchase Right is exercised, the purchaser shall have rights
      equivalent to those of a shareholder and shall be a shareholder when his or
      her
      purchase is entered upon the records of the duly authorized transfer agent
      of
      the Company. No adjustment shall be made for a dividend or other right for
      which
      the record date is prior to the date the Stock Purchase Right is exercised,
      except as provided in Section 13 of the Plan.

     

    13.  Adjustments
      upon Changes in Capitalization, Merger or Asset Sale.

     

    (a)  In
      the
      event that the Administrator determines that, other than an Equity
      Restructuring, any dividend or other distribution (whether in the form of cash,
      Common Stock, other securities, or other property), reorganization, merger,
      consolidation, combination, repurchase, liquidation, dissolution, or sale,
      transfer, exchange or other disposition of all or substantially all of the
      assets of the Company, or exchange of Common Stock or other securities of the
      Company, issuance of warrants or other rights to purchase Common Stock or other
      securities of the Company, or other similar corporate transaction or event,
      in
      the Administrator’s sole discretion, affects the Common Stock such that an
      adjustment is determined by the Administrator to be appropriate in order to
      prevent dilution or enlargement of the benefits or potential benefits intended
      by the Company to be made available under the Plan or with respect to any
      Option, Stock Purchase Right or Restricted Stock, then the Administrator shall,
      in such manner as it may deem equitable, adjust any or all of:

     

    
      
        
        

      

      
        11

        
          

        

      

      
        
        

      

    

    (i)  the
      number and kind of shares of Common Stock (or other securities or property)
      with
      respect to which Options or Stock Purchase Rights may be granted or awarded
      (including, but not limited to, adjustments of the limitations in Section 3
      on
      the maximum number and kind of shares which may be issued and adjustments of
      the
      maximum number of Shares that may be purchased by any Holder in any calendar
      year pursuant to Section 6(c));

     

    (ii)  the
      number and kind of shares of Common Stock (or other securities or property)
      subject to outstanding Options, Stock Purchase Rights or Restricted Stock;
      and

     

    (iii)  the
      grant
      or exercise price with respect to any Option or Stock Purchase
      Right.

     

    (b)  In
      the
      event of any transaction or event described in Section 13(a), the Administrator,
      in its sole discretion, and on such terms and conditions as it deems
      appropriate, either by the terms of the Option, Stock Purchase Right or
      Restricted Stock or by action taken prior to the occurrence of such transaction
      or event and either automatically or upon the Holder’s request, is hereby
      authorized to take any one or more of the following actions whenever the
      Administrator determines that such action is appropriate in order to prevent
      dilution or enlargement of the benefits or potential benefits intended by the
      Company to be made available under the Plan or with respect to any Option,
      Stock
      Purchase Right or Restricted Stock granted or issued under the Plan or to
      facilitate such transaction or event:

     

    (i)  To
      provide for either the purchase of any such Option, Stock Purchase Right or
      Restricted Stock for an amount of cash equal to the amount that could have
      been
      obtained upon the exercise of such Option or Stock Purchase Right or realization
      of the Holder’s rights had such Option, Stock Purchase Right or Restricted Stock
      been currently exercisable or payable or fully vested or the replacement of
      such
      Option, Stock Purchase Right or Restricted Stock with other rights or property
      selected by the Administrator in its sole discretion;

     

    (ii)  To
      provide that such Option or Stock Purchase Right shall be exercisable as to
      all
      shares covered thereby, notwithstanding anything to the contrary in the Plan
      or
      the provisions of such Option or Stock Purchase Right;

     

    
      
        
        

      

      
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    (iii)  To
      provide that such Option, Stock Purchase Right or Restricted Stock be assumed
      by
      the successor or survivor corporation, or a parent or subsidiary thereof, or
      shall be substituted for by similar options, rights or awards covering the
      stock
      of the successor or survivor corporation, or a parent or subsidiary thereof,
      with appropriate adjustments as to the number and kind of shares and
      prices;

     

    (iv)  To
      make
      adjustments in the number and type of shares of Common Stock (or other
      securities or property) subject to outstanding Options and Stock Purchase
      Rights, and/or in the terms and conditions of (including the grant or exercise
      price), and the criteria included in, outstanding Options, Stock Purchase Rights
      or Restricted Stock or Options, Stock Purchase Rights or Restricted Stock which
      may be granted in the future; and

     

    (v)  To
      provide that immediately upon the consummation of such event, such Option or
      Stock Purchase Right shall not be exercisable and shall terminate; provided,
      that for
      a specified period of time prior to such event, such Option or Stock Purchase
      Right shall be exercisable as to all Shares covered thereby, and the
      restrictions imposed under an Option Agreement or Restricted Stock purchase
      agreement upon some or all Shares may be terminated and, in the case of
      Restricted Stock, some or all shares of such Restricted Stock may cease to
      be
      subject to repurchase, notwithstanding anything to the contrary in the Plan
      or
      the provisions of such Option, Stock Purchase Right or Restricted Stock purchase
      agreement.

     

    (c)  In
      connection with the occurrence of any Equity Restructuring, and notwithstanding
      anything to the contrary in Sections 13(a) and 13(b) hereof:

     

    (i)  The
      number and type of securities subject to each outstanding Option or Stock
      Purchase Right and the exercise price or grant price thereof, if applicable,
      will be proportionately adjusted. The adjustments provided under this Section
      13(c)(i) shall be nondiscretionary and shall be final and binding on the
      affected Holder and the Company.

     

    (ii)  The
      Administrator shall make such proportionate adjustments, if any, as the
      Administrator in its discretion may deem appropriate to reflect such Equity
      Restructuring with respect to the aggregate number and kind of shares that
      may
      be issued under the Plan (including, but not limited to, adjustments of the
      limitations in Section 3 hereof).

     

    (d)  If
      the
      Company undergoes an Acquisition, then the vesting of any outstanding Options,
      Stock Purchase Rights or Restricted Stock (and, if applicable, the time during
      which such awards may be exercised) shall be accelerated and made fully
      exercisable and all restrictions thereon shall lapse at least ten (10) days
      prior to the closing of the Acquisition. Any surviving corporation or entity
      or
      acquiring corporation or entity, or affiliate of such corporation or entity,
      may
      assume any Options, Stock Purchase Rights or Restricted Stock outstanding under
      the Plan or may substitute similar stock awards (including an award to acquire
      the same consideration paid to the stockholders in the transaction described
      in
      this subsection 13(d)) for those outstanding under the Plan. In the event any
      surviving corporation or entity or acquiring corporation or entity in an
      Acquisition, or affiliate of such corporation or entity, does not assume any
      Options, Stock Purchase Rights or Restricted Stock or does not substitute
      similar stock awards for those outstanding under the Plan, then such Options
      or
      Stock Purchase Rights shall terminate if not exercised prior to the closing
      of
      such Acquisition. 

     

    
      
        
        

      

      
        13

        
          

        

      

      
        
        

      

    

    (e)  Subject
      to Section 3, the Administrator may, in its sole discretion, include such
      further provisions and limitations in any Option, Stock Purchase Right,
      Restricted Stock agreement or certificate, as it may deem equitable and in
      the
      best interests of the Company.

     

    (f)  The
      existence of the Plan, any Option Agreement or Restricted Stock purchase
      agreement and the Options or Stock Purchase Rights granted hereunder shall
      not
      affect or restrict in any way the right or power of the Company or the
      stockholders of the Company to make or authorize any adjustment,
      recapitalization, reorganization or other change in the Company’s capital
      structure or its business, any merger or consolidation of the Company, any
      issue
      of stock or of options, warrants or rights to purchase stock or of bonds,
      debentures, preferred or prior preference stocks whose rights are superior
      to or
      affect the Common Stock or the rights thereof or which are convertible into
      or
      exchangeable for Common Stock, or the dissolution or liquidation of the Company,
      or any sale or transfer of all or any part of its assets or business, or any
      other corporate act or proceeding, whether of a similar character or otherwise.
      

     

    14.  Time
      of Granting Options and Stock Purchase Rights.
      The
      date of grant of an Option or Stock Purchase Right shall, for all purposes,
      be
      the date on which the Administrator makes the determination granting such Option
      or Stock Purchase Right, or such other date as is determined by the
      Administrator. Notice of the determination shall be given to each Employee
      or
      Consultant to whom an Option or Stock Purchase Right is so granted within a
      reasonable time after the date of such grant.

     

    15.  Amendment
      and Termination of the Plan. 

     

    (a)  Amendment
      and Termination.
      The
      Board may at any time wholly or partially amend, alter, suspend or terminate
      the
      Plan. However, without approval of the Company’s stockholders given within
      twelve (12) months before or after the action by the Board, no action of the
      Board may, except as provided in Section 13, increase the limits imposed in
      Section 3 on the maximum number of Shares which may be issued under the
      Plan or extend the term of the Plan under Section 7.

     

    (b)  Stockholder
      Approval.
      The
      Board shall obtain stockholder approval of any Plan amendment to the extent
      necessary and desirable to comply with Applicable Laws.

     

    (c)  Effect
      of Amendment or Termination.
      No
      amendment, alteration, suspension or termination of the Plan shall impair the
      rights of any Holder, unless mutually agreed otherwise between the Holder and
      the Administrator, which agreement must be in writing and signed by the Holder
      and the Company. Termination of the Plan shall not affect the Administrator’s
      ability to exercise the powers granted to it hereunder with respect to Options,
      Stock Purchase Rights or Restricted Stock granted or awarded under the Plan
      prior to the date of such termination.

     

    16.  Stockholder
      Approval.
      The
      Plan will be submitted for the approval of the Company’s stockholders within
      twelve (12) months after the date of the Board’s initial adoption of the Plan.
      Options, Stock Purchase Rights or Restricted Stock may be granted or awarded
      prior to such stockholder approval, provided that such Options, Stock Purchase
      Rights and Restricted Stock shall not be exercisable, shall not vest and the
      restrictions thereon shall not lapse prior to the time when the Plan is approved
      by the stockholders, and provided further that if such approval has not been
      obtained at the end of said twelve-month period, all Options, Stock Purchase
      Rights and Restricted Stock previously granted or awarded under the Plan shall
      thereupon be canceled and become null and void.

     

    
      
        
        

      

      
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    17.  Inability
      to Obtain Authority.
      The
      inability of the Company to obtain authority from any regulatory body having
      jurisdiction, which authority is deemed by the Company’s counsel to be necessary
      to the lawful issuance and sale of any Shares hereunder, shall relieve the
      Company of any liability in respect of the failure to issue or sell such Shares
      as to which such requisite authority shall not have been obtained.

     

    18.  Reservation
      of Shares.
      The
      Company, during the term of this Plan, shall at all times reserve and keep
      available such number of Shares as shall be sufficient to satisfy the
      requirements of the Plan.

     

    19.  Repurchase
      Provisions.
      The
      Administrator in its sole discretion may provide that the Company may repurchase
      Shares acquired upon exercise of an Option or Stock Purchase Right upon the
      occurrence of certain specified events, including, without limitation, a
      Holder’s termination as a Service Provider, divorce, bankruptcy or
      insolvency.

     

    20.  Investment
      Intent.
      The
      Company may require a Plan participant, as a condition of exercising or
      acquiring stock under any Option or Stock Purchase Right, (i) to give written
      assurances satisfactory to the Company as to the participant’s knowledge and
      experience in financial and business matters and/or to employ a purchaser
      representative reasonably satisfactory to the Company who is knowledgeable
      and
      experienced in financial and business matters and that he or she is capable
      of
      evaluating, alone or together with the purchaser representative, the merits
      and
      risks of exercising the Option or Stock Purchase Right; and (ii) to give written
      assurances satisfactory to the Company stating that the participant is acquiring
      the stock subject to the Option or Stock Purchase Right for the participant’s
      own account and not with any present intention of selling or otherwise
      distributing the stock. The foregoing requirements, and any assurances given
      pursuant to such requirements, shall be inoperative if (A) the issuance of
      the
      shares upon the exercise or acquisition of stock under the applicable Option
      or
      Stock Purchase Right has been registered under a then currently effective
      registration statement under the Securities Act or (B) as to any particular
      requirement, a determination is made by counsel for the Company that such
      requirement need not be met in the circumstances under the then applicable
      securities laws. The Company may, upon advice of counsel to the Company, place
      legends on stock certificates issued under the Plan as such counsel deems
      necessary or appropriate in order to comply with applicable securities laws,
      including, but not limited to, legends restricting the transfer of the
      stock.

     

    21.  Governing
      Law.
      The
      validity and enforceability of this Plan shall be governed by and construed
      in
      accordance with the laws of the State of Delaware without regard to otherwise
      governing principles of conflicts of law.

     

    15

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