Exhibit 10.5

           

        

           

        Zymergen, Inc

      

         

      2014 Stock Plan

      

         

      Notice of Stock Option Grant (Installment Exercise with Acceleration)

      

         

    

    
      The Optionee has been granted the following option to purchase shares of the Common Stock of Zymergen, Inc.:

      

         

      Name of Optionee: ###PARTICIPANT_NAME###

      

         

      Total Number of Shares: ###TOTAL_AWARDS###

      

         

      Type of Option: ###DICTIONARY_AWARD_NAME###

      

         

      Exercise Price per Share: ###GRANT_PRICE###

      

         

      Date of Grant: ###GRANT_DATE###

      

         

      Date Exercisable: This option may be exercised with respect to the first 25% of the Shares subject to this option when the Optionee completes 12 months of continuous Service beginning with the
        Vesting Commencement Date set forth below. This option may be exercised with respect to an additional 1/48 th of the Shares subject to this option when the Optionee
        completes each month of continuous Service thereafter. This option may become exercisable on an accelerated basis under Section 2(a) of the Stock Option Agreement.

      

         

      Vesting Commencement Date: ###ALTERNATIVE_VEST_BASE_DATE###

      

         

      Expiration Date: ###EXPIRY_DATE###. This option expires earlier if the Optionee’s Service terminates earlier, as provided in Section 6 of the Stock Option Agreement, or if the Company engages in
        certain corporate transactions, as provided in Section 8(b) of the Plan.

      

         

      By signing below, the Optionee and the Company agree that this option is granted under, and governed by the terms and conditions of, the 2014 Stock Plan and the Stock Option Agreement. Both of
        these documents are attached to, and made a part of, this Notice of Stock Option Grant. Section 13 of the Stock Option Agreement includes important acknowledgements of the Optionee.

      

         

      Optionee:                                                                                            Zymergen, Inc.

      

         

      ###PARTICIPANT_NAME###                                                              ###SIGNATURE###

      

         

      THE OPTION GRANTED PURSUANT TO THIS AGREEMENT AND THE SHARES ISSUABLE UPON THE EXERCISE THEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY
        NOT BE SOLD, PLEDGED, OR OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR AN OPINION OF COUNSEL, SATISFACTORY TO THE COMPANY AND ITS COUNSEL, THAT SUCH REGISTRATION IS NOT REQUIRED.

      
        
          


      

       

    
      Zymergen, Inc

      

         

      2014 Stock Plan

      

         

      Stock Option Agreement (Installment Exercise)

      

         

    

    
      SECTION 1. Grant Of Option.

      

         

    

    
      (a) Option. On the terms and conditions set forth in the Notice of Stock Option Grant and this Agreement, the Company grants to the Optionee on the Date
        of Grant the option to purchase at the Exercise Price the number of Shares set forth in the Notice of Stock Option Grant. The Exercise Price is agreed to be at least 100% of the Fair Market Value per Share on the Date of Grant (110% of Fair Market
        Value if this option is designated as an ISO in the Notice of Stock Option Grant and Section 3(b) of the Plan applies). This option is intended to be an ISO or an NSO, as provided in the Notice of Stock Option Grant.

    

    
      

         

      (b) $100,000 Limitation. Even if this option is designated as an ISO in the Notice of Stock Option Grant, it shall be deemed to be an NSO to the extent
        (and only to the extent) required by the $100,000 annual limitation under Section 422(d) of the Code.

      

         

      (c) Stock Plan and Defined Terms. This option is granted pursuant to the Plan, a copy of which the Optionee acknowledges having received. The provisions
        of the Plan are incorporated into this Agreement by this reference. Except as otherwise defined in this Agreement (including without limitation Section 14 hereof), capitalized terms shall have the meaning ascribed to such terms in the Plan.

      

         

      SECTION 2. Right To Exercise.

      

         

      (a) Exercisability. Subject to Subsection (b) below and the other conditions set forth in this Agreement, all or part of this option may be exercised
        prior to its expiration at the time or times set forth in the Notice of Stock Option Grant. In addition, the following rules shall apply if the Company is subject to a Change in Control before the Optionee’s Service terminates:

      

         

      (i) At all times after the Change in Control, the exercisable portion of this option shall be determined by adding 12 months to the Optionee’s actual Service.

      

         

      (ii) If the Optionee is subject to an Involuntary Termination within 12 months after the Change in Control, then 100% of the Shares subject to this option shall become vested and exercisable.

      

         

      (b) Stockholder Approval. Any other provision of this Agreement notwithstanding, no portion of this option shall be exercisable at any time prior to the
        approval of the Plan by the Company’s stockholders.

      

         

      SECTION 3. No Transfer Or Assignment Of Option.

      

         

      Except as otherwise provided in this Agreement, this option and the rights and privileges conferred hereby shall not be sold, pledged or otherwise transferred (whether by operation of law or
        otherwise) and shall not be subject to sale under execution, attachment, levy or similar process.

      
        
          


      

      SECTION 4. Exercise Procedures.

      

         

      (a) Notice of Exercise. The Optionee or the Optionee’s representative may exercise this option by: (i) signing and delivering written notice to the
        Company pursuant to Section 12(c) specifying the election to exercise this option, the number of Shares for which it is being exercised and the form of payment and (ii) delivering payment, in a form permissible under Section 5, for the full amount
        of the Purchase Price (together with any applicable withholding taxes under Subsection (b)). In the event that this option is being exercised by the representative of the Optionee, the notice shall be accompanied by proof (satisfactory to the
        Company) of the representative’s right to exercise this option.

      

         

      (b) Withholding Taxes. In the event that the Company determines that it is required to withhold any tax (including without limitation any income tax,
        social insurance contributions, payroll tax, payment on account or other tax-related items arising in connection with the Optionee’s participation in the Plan and legally applicable to the Optionee (the “Tax-Related
          Items”)) as a result of the grant, vesting or exercise of this option, or as a result of the transfer of shares acquired upon exercise of this option, the Optionee, as a condition of this option, shall make arrangements satisfactory to the
        Company to enable it to satisfy all Tax-Related Items. The Optionee acknowledges that the responsibility for all Tax-Related Items is the Optionee’s and may exceed the amount actually withheld by the Company (or its affiliate or agent).

      

         

      (c) Issuance of Shares. After satisfying all requirements for exercise of this option, the Company shall cause to be issued one or more certificates
        evidencing the Shares for which this option has been exercised. Such Shares shall be registered (i) in the name of the person exercising this option, (ii) in the names of such person and his or her spouse as community property or as joint tenants
        with the right of survivorship or (iii) with the Company’s consent, in the name of a revocable trust. Until the issuance of the Shares has been entered into the books and records of the Company or a duly authorized transfer agent of the Company, no
        right to vote, receive dividends or any other right as a stockholder will exist with respect to such Shares. The Company shall cause such certificates to be delivered to or upon the order of the person exercising this option.

      

         

      SECTION 5. Payment For Stock.

      

         

      (a) Cash. All or part of the Purchase Price may be paid in cash or cash equivalents.

      

         

      (b) Surrender of Stock. At the discretion of the Board of Directors, all or any part of the Purchase Price may be paid by surrendering, or attesting to
        the ownership of, Shares that are already owned by the Optionee. Such Shares shall be surrendered to the Company in good form for transfer and shall be valued at their Fair Market Value as of the date when this option is exercised.

      

         

      (c) Exercise/Sale. All or part of the Purchase Price and any withholding taxes may be paid by the delivery (on a form prescribed by the Company) of an
        irrevocable direction to a securities broker approved by the Company to sell Shares and to deliver all or part of the sales proceeds to the Company. However, payment pursuant to this Subsection (c) shall be permitted only if (i) Stock then is
        publicly traded and (ii) such payment does not violate applicable law.

      
        
          


      

      SECTION 6. Term And Expiration.

      

         

      (a) Basic Term. This option shall in any event expire on the expiration date set forth in the Notice of Stock Option Grant, which date is 10 years after
        the Date of Grant (five years after the Date of Grant if this option is designated as an ISO in the Notice of Stock Option Grant and Section 3(b) of the Plan applies).

      

         

      (b) Termination of Service (Except by Death). If the Optionee’s Service terminates for any reason other than death, then this option shall expire on the
        earliest of the following occasions:

      

         

      (i) The expiration date determined pursuant to Subsection (a) above;

      

         

      (ii) The date three months after the termination of the Optionee’s Service for any reason other than Disability; or

      

         

      (iii) The date six months after the termination of the Optionee’s Service by reason of Disability.

      

         

      The Optionee may exercise all or part of this option at any time before its expiration under the preceding sentence, but only to the extent that this option had become exercisable before the
        Optionee’s Service terminated. When the Optionee’s Service terminates, this option shall expire immediately with respect to the number of Shares for which this option is not yet exercisable. In the event that the Optionee dies after termination of
        Service but before the expiration of this option, all or part of this option may be exercised (prior to expiration) by the executors or administrators of the Optionee’s estate or by any person who has acquired this option directly from the Optionee
        by beneficiary designation, bequest or inheritance, but only to the extent that this option had become exercisable before the Optionee’s Service terminated. Once this option (or portion thereof) has terminated, the Optionee shall have no further
        rights with respect to the option (or portion thereof) or to the underlying Shares.

      

         

      (c) Death of the Optionee. If the Optionee dies while in Service, then this option shall expire on the earlier of the following dates:

      

         

      (i) The expiration date determined pursuant to Subsection (a) above; or

      

         

      (ii) The date 12 months after the Optionee’s death.

      

         

      All or part of this option may be exercised at any time before its expiration under the preceding sentence by the executors or administrators of the Optionee’s estate or by any person who has
        acquired this option directly from the Optionee by beneficiary designation, bequest or inheritance, but only to the extent that this option had become exercisable before the Optionee’s death. When the Optionee dies, this option shall expire
        immediately with respect to the number of Shares for which this option is not yet exercisable. Once this option (or portion thereof) has terminated, the Optionee shall have no further rights with respect to the option (or portion thereof) or to the
        underlying Shares.

      

         

      (d) Extension of Post-Termination Exercise Periods. Following the date on which the Company’s Stock is first listed for trading on an established
        securities market, if during any part of the exercise period described in Subsections (b)(ii) or (iii) or Subsection (c)(ii) above the exercise of this option would be prohibited solely because the issuance of Shares upon such exercise would
        violate the registration requirements under the Securities Act or a similar provision of other applicable law, then instead of terminating at the end of such prescribed period, the then-vested portion of this option will instead remain outstanding
        and not expire until the earlier of (i) the expiration date determined pursuant to Section 6(a) above or (ii) the date on which the then-vested portion of this option has been exercisable without violation of applicable law for the aggregate period
        (which need not be consecutive) after termination of the Optionee’s Service specified in the applicable Subsection above.

      
        
          


      

      (e) Part-Time Employment and Leaves of Absence. If the Optionee commences working on a part-time basis, then the Company may adjust the vesting schedule
        set forth in the Notice of Stock Option Grant. If the Optionee goes on a leave of absence, then the Company may adjust the vesting schedule set forth in the Notice of Stock Option Grant in accordance with the Company’s leave of absence policy or
        the terms of such leave. Except as provided in the preceding sentence, Service shall be deemed to continue for any purpose under this Agreement while the Optionee is on a bona fide leave of absence, if (i)
        such leave was approved by the Company in writing and (ii) continued crediting of Service for such purpose is expressly required by the terms of such leave or by applicable law (as determined by the Company). Service shall be deemed to terminate
        when such leave ends, unless the Optionee immediately returns to active work.

      

         

      (f) Notice Concerning ISO Treatment. Even if this option is designated as an ISO in the Notice of Stock Option Grant, it ceases to qualify for favorable
        tax treatment as an ISO to the extent that it is exercised:

      

         

      (i) More than three months after the date when the Optionee ceases to be an Employee for any reason other than death or permanent and total disability (as defined in Section 22(e)(3) of the
        Code);

      

         

      (ii) More than 12 months after the date when the Optionee ceases to be an Employee by reason of permanent and total disability (as defined in Section 22(e)(3) of the Code); or

      

         

      (iii) More than three months after the date when the Optionee has been on a leave of absence for three months, unless the Optionee’s reemployment rights following such leave were guaranteed by
        statute or by contract.

      

         

      SECTION 7. Right Of First Refusal.

      

         

      (a) Right of First Refusal. In the event that the Optionee proposes to sell, pledge or otherwise transfer to a third party any Shares acquired under this
        Agreement, or any interest in such Shares, the Company shall have the Right of First Refusal with respect to all (and not less than all) of such Shares. If the Optionee desires to transfer Shares acquired under this Agreement, the Optionee shall
        give a written Transfer Notice to the Company describing fully the proposed transfer, including the number of Shares proposed to be transferred, the proposed transfer price, the name and address of the proposed Transferee and proof satisfactory to
        the Company that the proposed sale or transfer will not violate any applicable federal, State or foreign securities laws. The Transfer Notice shall be signed both by the Optionee and by the proposed Transferee and must constitute a binding
        commitment of both parties to the transfer of the Shares. The Company shall have the right to purchase all, and not less than all, of the Shares on the terms of the proposal described in the Transfer Notice (subject, however, to any change in such
        terms permitted under Subsection (b) below) by delivery of a notice of exercise of the Right of First Refusal within 30 days after the date when the Transfer Notice was received by the Company.

      
        
          


      

      (b) Transfer of Shares. If the Company fails to exercise its Right of First Refusal within 30 days after the date when it received the Transfer Notice,
        the Optionee may, not later than 90 days following receipt of the Transfer Notice by the Company, conclude a transfer of the Shares subject to the Transfer Notice on the terms and conditions described in the Transfer Notice, provided that any such
        sale is made in compliance with applicable federal, State and foreign securities laws and not in violation of any other contractual restrictions to which the Optionee is bound. Any proposed transfer on terms and conditions different from those
        described in the Transfer Notice, as well as any subsequent proposed transfer by the Optionee, shall again be subject to the Right of First Refusal and shall require compliance with the procedure described in Subsection (a) above. If the Company
        exercises its Right of First Refusal, the parties shall consummate the sale of the Shares on the terms set forth in the Transfer Notice within 60 days after the date when the Company received the Transfer Notice (or within such longer period as may
        have been specified in the Transfer Notice); provided, however, that in the event the Transfer Notice provided that payment for the Shares was to be made in a form other than cash or cash equivalents paid at the time of transfer, the Company shall
        have the option of paying for the Shares with cash or cash equivalents equal to the present value of the consideration described in the Transfer Notice.

      

         

      (c) Additional or Exchanged Securities and Property. In the event of a merger or consolidation of the Company, a sale of all or substantially all of the
        Company’s stock or assets, any other corporate reorganization, a stock split, the declaration of a stock dividend, the declaration of an extraordinary dividend payable in a form other than stock, a spin‐off, an adjustment in conversion ratio, a
        recapitalization or a similar transaction affecting the Company’s outstanding securities, any securities or other property (including cash or cash equivalents) that are by reason of such transaction exchanged for, or distributed with respect to,
        any Shares subject to this Section 7 shall immediately be subject to the Right of First Refusal. Appropriate adjustments to reflect the exchange or distribution of such securities or property shall be made to the number and/or class of the Shares
        subject to this Section 7.

      

         

      (d) Termination of Right of First Refusal. Any other provision of this Section 7 notwithstanding, in the event that the Stock is readily tradable on an
        established securities market when the Optionee desires to transfer Shares, the Company shall have no Right of First Refusal, and the Optionee shall have no obligation to comply with the procedures prescribed by Subsections (a) and (b) above.

      

         

      (e) Permitted Transfers. This Section 7 shall not apply to (i) a transfer by beneficiary designation, will or intestate succession or (ii) a transfer to
        one or more members of the Optionee’s Immediate Family or to a trust established by the Optionee for the benefit of the Optionee and/or one or more members of the Optionee’s Immediate Family, provided in either case that the Transferee agrees in
        writing on a form prescribed by the Company to be bound by all provisions of this Agreement. If the Optionee transfers any Shares acquired under this Agreement, either under this Subsection (e) or after the Company has failed to exercise the Right
        of First Refusal, then this Agreement shall apply to the Transferee to the same extent as to the Optionee.

      

         

      (f) Termination of Rights as Stockholder. If the Company makes available, at the time and place and in the amount and form provided in this Agreement, the
        consideration for the Shares to be purchased in accordance with this Section 7, then after such time the person from whom such Shares are to be purchased shall no longer have any rights as a holder of such Shares (other than the right to receive
        payment of such consideration in accordance with this Agreement). Such Shares shall be deemed to have been purchased in accordance with the applicable provisions hereof, whether or not the certificate(s) therefor have been delivered as required by
        this Agreement.

      
        
          


      

      (g) Assignment of Right of First Refusal. The Board of Directors may freely assign the Company’s Right of First Refusal, in whole or in part. Any person
        who accepts an assignment of the Right of First Refusal from the Company shall assume all of the Company’s rights and obligations under this Section 7.

      

         

      SECTION 8. Legality Of Initial Issuance.

      

         

      No Shares shall be issued upon the exercise of this option unless and until the Company has determined that:

      

         

      (a) It and the Optionee have taken any actions required to register the Shares under the Securities Act or to perfect an exemption from the registration requirements thereof;

      

         

      (b) Any applicable listing requirement of any stock exchange or other securities market on which Stock is listed has been satisfied; and

      

         

      (c) Any other applicable provision of federal, State or foreign law has been satisfied.

      

         

      SECTION 9. No Registration Rights.

      

         

      The Company may, but shall not be obligated to, register or qualify the sale of Shares under the Securities Act or any other applicable law. The Company shall not be obligated to take any
        affirmative action in order to cause the sale of Shares under this Agreement to comply with any law.

      

         

      SECTION 10. Restrictions On Transfer of shares.

      

         

      (a) Securities Law Restrictions. Regardless of whether the offer and sale of Shares under the Plan have been registered under the Securities Act or have
        been registered or qualified under the securities laws of any State or other relevant jurisdiction, the Company at its discretion may impose restrictions upon the sale, pledge or other transfer of such Shares (including the placement of appropriate
        legends on the stock certificates (or electronic equivalent) or the imposition of stop-transfer instructions) and may refuse (or may be required to refuse) to transfer Shares acquired hereunder (or Shares proposed to be transferred in a subsequent
        transfer) if, in the judgment of the Company, such restrictions, legends or refusal are necessary or appropriate to achieve compliance with the Securities Act or other relevant securities or other laws, including without limitation under Regulation
        S of the Securities Act or pursuant to another available exemption from registration.

      

         

      (b) Market Stand-Off. In connection with any underwritten public offering by the Company of its equity securities pursuant to an effective registration
        statement filed under the Securities Act, including the Company’s initial public offering, the Optionee or a Transferee shall not directly or indirectly sell, make any short sale of, loan, hypothecate, pledge, offer, grant or sell any option or
        other contract for the purchase of, purchase any option or other contract for the sale of, or otherwise dispose of or transfer, or agree to engage in any of the foregoing transactions with respect to, any Shares acquired under this Agreement
        without the prior written consent of the Company or its managing underwriter. Such restriction (the “Market Stand-Off”) shall be in effect for such period of time following the date of the final prospectus
        for the offering as may be requested by the Company or such underwriter. In no event, however, shall such period exceed 180 days plus such additional period as may reasonably be requested by the Company or such underwriter to accommodate regulatory
        restrictions on (i) the publication or other distribution of research reports or (ii) analyst recommendations and opinions, including (without limitation) the restrictions set forth in Rule 2711(f)(4) of the National Association of Securities
        Dealers and Rule 472(f)(4) of the New York Stock Exchange, as amended, or any similar successor rules. The Market Stand-Off shall in any event terminate two years after the date of the Company’s initial public offering. In the event of the
        declaration of a stock dividend, a spin‐off, a stock split, an adjustment in conversion ratio, a recapitalization or a similar transaction affecting the Company’s outstanding securities without receipt of consideration, any new, substituted or
        additional securities which are by reason of such transaction distributed with respect to any Shares subject to the Market Stand-Off, or into which such Shares thereby become convertible, shall immediately be subject to the Market Stand-Off. In
        order to enforce the Market Stand-Off, the Company may impose stop-transfer instructions with respect to the Shares acquired under this Agreement until the end of the applicable stand-off period. The Company’s underwriters shall be beneficiaries of
        the agreement set forth in this Subsection (b). This Subsection (b) shall not apply to Shares registered in the public offering under the Securities Act.

      
        
          


      

      (c) Investment Intent at Grant. The Optionee represents and agrees that the Shares to be acquired upon exercising this option will be acquired for
        investment, and not with a view to the sale or distribution thereof.

      

         

      (d) Investment Intent at Exercise. In the event that the sale of Shares under the Plan is not registered under the Securities Act but an exemption is
        available that requires an investment representation or other representation, the Optionee shall represent and agree at the time of exercise that the Shares being acquired upon exercising this option are being acquired for investment, and not with
        a view to the sale or distribution thereof, and shall make such other representations as are deemed necessary or appropriate by the Company and its counsel, including (if applicable because the Company is relying on Regulation S under the
        Securities Act) that as of the date of exercise the Optionee is (i) not a U.S. Person; (ii) not acquiring the Shares on behalf, or for the account or benefit, of a U.S. Person; and (iii) is not exercising the option in the United States.

      

         

      (e) Legends. All certificates evidencing Shares purchased under this Agreement shall bear the following legend:

      

         

      “THE SHARES REPRESENTED HEREBY MAY NOT BE SOLD, ASSIGNED, TRANSFERRED, ENCUMBERED OR IN ANY MANNER DISPOSED OF, EXCEPT IN COMPLIANCE WITH THE TERMS OF A WRITTEN AGREEMENT BETWEEN THE COMPANY AND
        THE REGISTERED HOLDER OF THE SHARES (OR THE PREDECESSOR IN INTEREST TO THE SHARES). SUCH AGREEMENT GRANTS TO THE COMPANY CERTAIN RIGHTS OF FIRST REFUSAL UPON AN ATTEMPTED TRANSFER OF THE SHARES. IN ADDITION, THE SHARES ARE SUBJECT TO RESTRICTIONS
        ON TRANSFER FOR A LIMITED PERIOD FOLLOWING THE EFFECTIVE DATE OF THE UNDERWRITTEN PUBLIC OFFERING OF THE COMPANY’S SECURITIES AND MAY NOT BE SOLD OR OTHERWISE DISPOSED OF BY THE HOLDER WITHOUT THE CONSENT OF THE COMPANY OR THE MANAGING UNDERWRITER.
        THE SECRETARY OF THE COMPANY WILL UPON WRITTEN REQUEST FURNISH A COPY OF SUCH AGREEMENT TO THE HOLDER HEREOF WITHOUT CHARGE.”

      
        
          


      

      All certificates evidencing Shares purchased under this Agreement in an unregistered transaction shall bear the following legend (and such other restrictive legends as are required or deemed
        advisable under the provisions of any applicable law):

      

         

      “THE SHARES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”) OR ANY SECURITIES LAWS OF ANY U.S. STATE, AND MAY NOT BE SOLD, REOFFERED, PLEDGED,
        ASSIGNED, ENCUMBERED OR OTHERWISE TRANSFERRED OR DISPOSED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR AN OPINION OF COUNSEL, SATISFACTORY TO THE COMPANY AND ITS COUNSEL, THAT SUCH REGISTRATION IS NOT REQUIRED. IN THE ABSENCE OF
        REGISTRATION OR THE AVAILABILITY (CONFIRMED BY OPINION OF COUNSEL) OF AN ALTERNATIVE EXEMPTION FROM REGISTRATION UNDER THE ACT (INCLUDING WITHOUT LIMITATION IN ACCORDANCE WITH REGULATION S UNDER THE ACT), THESE SHARES MAY NOT BE SOLD, REOFFERED,
        PLEDGED, ASSIGNED, ENCUMBERED OR OTHERWISE TRANSFERRED OR DISPOSED OF. HEDGING TRANSACTIONS INVOLVING THESE SHARES MAY NOT BE CONDUCTED UNLESS IN COMPLIANCE WITH THE ACT.”

      

         

      (f) Removal of Legends. If, in the opinion of the Company and its counsel, any legend placed on a stock certificate representing Shares sold under this
        Agreement is no longer required, the holder of such certificate shall be entitled to exchange such certificate for a certificate representing the same number of Shares but without such legend.

      

         

      (g) Administration. Any determination by the Company and its counsel in connection with any of the matters set forth in this Section 10 shall be
        conclusive and binding on the Optionee and all other persons.

      

         

      SECTION 11. Adjustment Of Shares.

      

         

      In the event of any transaction described in Section 8(a) of the Plan, the terms of this option (including, without limitation, the number and kind of Shares subject to this option and the
        Exercise Price) shall be adjusted as set forth in Section 8(a) of the Plan. In the event that the Company is a party to a merger or consolidation or in the event of a sale of all or substantially all of the Company’s stock or assets, this option
        shall be subject to the treatment provided by the Board of Directors in its sole discretion, as provided in Section 8(b) of the Plan.

      

         

      SECTION 12. Miscellaneous Provisions.

      

         

      (a) Rights as a Stockholder. Neither the Optionee nor the Optionee’s representative shall have any rights as a stockholder with respect to any Shares
        subject to this option until the Optionee or the Optionee’s representative becomes entitled to receive such Shares by filing a notice of exercise and paying the Purchase Price pursuant to Sections 4 and 5.

      
        
          


      

      (b) No Retention Rights. Nothing in this option or in the Plan shall confer upon the Optionee any right to continue in Service for any period of specific
        duration or interfere with or otherwise restrict in any way the rights of the Company (or any Parent or Subsidiary employing or retaining the Optionee) or of the Optionee, which rights are hereby expressly reserved by each, to terminate his or her
        Service at any time and for any reason, with or without cause.

      

         

      (c) Notice. Any notice required by the terms of this Agreement shall be given in writing. It shall be deemed effective upon (i) personal delivery, (ii)
        deposit with the United States Postal Service, by registered or certified mail, with postage and fees prepaid, (iii) deposit with Federal Express Corporation, with shipping charges prepaid or (iv) deposit with any internationally recognized express
        mail courier service. Notice shall be addressed to the Company at its principal executive office and to the Optionee at the address that he or she most recently provided to the Company in accordance with this Subsection (c).

      

         

      (d) Modifications and Waivers. No provision of this Agreement shall be modified, waived or discharged unless the modification, waiver or discharge is
        agreed to in writing and signed by the Optionee and by an authorized officer of the Company (other than the Optionee). No waiver by either party of any breach of, or of compliance with, any condition or provision of this Agreement by the other
        party shall be considered a waiver of any other condition or provision or of the same condition or provision at another time.

      

         

      (e) Entire Agreement. The Notice of Stock Option Grant, this Agreement and the Plan constitute the entire contract between the parties hereto with regard
        to the subject matter hereof. They supersede any other agreements, representations or understandings (whether oral or written and whether express or implied) that relate to the subject matter hereof.

      

         

      (f) Choice of Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of Delaware, as such laws are applied to
        contracts entered into and performed in such State.

      

         

      SECTION 13. Acknowledgements of the Optionee.

      

         

      In addition to the other terms, conditions and restrictions imposed on this option and the Shares issuable under this option pursuant to this Agreement and the Plan, the Optionee expressly
        acknowledges being subject to Sections 7 (Right of First Refusal), 8 (Legality of Initial Issuance) and 10 (Restrictions on Transfer of Shares, including without limitation the Market Stand-Off), as well as the following provisions:

      

         

      (a) Tax Consequences (No Liability for Discounted Options). The Optionee agrees that the Company does not have a duty to design or administer the Plan or
        its other compensation programs in a manner that minimizes the Optionee’s tax liabilities. The Optionee shall not make any claim against the Company or its Board of Directors, officers or employees related to tax liabilities arising from this
        option or the Optionee’s other compensation. In particular, any Optionee subject to U.S. taxation acknowledges that this option is exempt from Section 409A of the Code only if the Exercise Price is at least equal to the Fair Market Value per Share
        on the Date of Grant. Since Shares are not traded on an established securities market, the determination of their Fair Market Value is made by the Board of Directors or by an independent valuation firm retained by the Company. The Optionee
        acknowledges that there is no guarantee in either case that the Internal Revenue Service will agree with the valuation, and the Optionee shall not make any claim against the Company or its Board of Directors, officers or employees in the event that
        the Internal Revenue Service asserts that the valuation was too low.

      
        
          


      

      (b) Electronic Delivery of Documents. The Optionee agrees to accept by email all documents relating to the Company, the Plan or this option and all other
        documents that the Company is required to deliver to its security holders (including, without limitation, disclosures that may be required by the Securities and Exchange Commission). The Optionee also agrees that the Company may deliver these
        documents by posting them on a website maintained by the Company or by a third party under contract with the Company. If the Company posts these documents on a website, it shall notify the Optionee by email of their availability. The Optionee
        acknowledges that he or she may incur costs in connection with electronic delivery, including the cost of accessing the internet and printing fees, and that an interruption of internet access may interfere with his or her ability to access the
        documents. This consent shall remain in effect until this option expires or until the Optionee gives the Company written notice that it should deliver paper documents.

      

         

      (c) No Notice of Expiration Date. The Optionee agrees that the Company and its officers, employees, attorneys and agents do not have any obligation to
        notify him or her prior to the expiration of this option pursuant to Section 6, regardless of whether this option will expire at the end of its full term or on an earlier date related to the termination of the Optionee’s Service. The Optionee
        further agrees that he or she has the sole responsibility for monitoring the expiration of this option and for exercising this option, if at all, before it expires. This Subsection (c) shall supersede any contrary representation that may have been
        made, orally or in writing, by the Company or by an officer, employee, attorney or agent of the Company.

      

         

      (d) Waiver of Statutory Information Rights. The Optionee acknowledges and agrees that, upon exercise of this option and until the first sale of the
        Company’s Stock to the general public pursuant to a registration statement filed under the Securities Act, he or she will be deemed to have waived any rights the Optionee might otherwise have had under Section 220 of the Delaware General
        Corporation Law (or under similar rights under other applicable law) to inspect for any proper purpose and to make copies and extracts from the Company’s stock ledger, a list of its stockholders and its other books and records or the books and
        records of any subsidiary. This waiver applies only in the Optionee’s capacity as a stockholder and does not affect any other inspection rights the Optionee may have under other law or pursuant to a written agreement with the Company.

      

         

      (e) Plan Discretionary. The Optionee understands and acknowledges that (i) the Plan is entirely discretionary, (ii) the Company and the Optionee’s
        employer have reserved the right to amend, suspend or terminate the Plan at any time, (iii) the grant of an option does not in any way create any contractual or other right to receive additional grants of options (or benefits in lieu of options) at
        any time or in any amount and (iv) all determinations with respect to any additional grants, including (without limitation) the times when options will be granted, the number of Shares offered, the Exercise Price and the vesting schedule, will be
        at the sole discretion of the Company.

      
        
          


      

      (f) Termination of Service. The Optionee understands and acknowledges that participation in the Plan ceases upon termination of his or her Service for any
        reason, except as may explicitly be provided otherwise in the Plan or this Agreement.

      

         

      (g) Extraordinary Compensation. The value of this option shall be an extraordinary item of compensation outside the scope of the Optionee’s employment
        contract, if any, and shall not be considered a part of his or her normal or expected compensation for purposes of calculating severance, resignation, redundancy or end-of-service payments, bonuses, long-service awards, pension or retirement
        benefits or similar payments.

      

         

      (h) Authorization to Disclose. The Optionee hereby authorizes and directs the Optionee’s employer to disclose to the Company or any Subsidiary any
        information regarding the Optionee’s employment, the nature and amount of the Optionee’s compensation and the fact and conditions of the Optionee’s participation in the Plan, as the Optionee’s employer deems necessary or appropriate to facilitate
        the administration of the Plan.

      

         

      (i) Personal Data Authorization. The Optionee consents to the collection, use and transfer of personal data as described in this Subsection (i). The
        Optionee understands and acknowledges that the Company, the Optionee’s employer and the Company’s other Subsidiaries hold certain personal information regarding the Optionee for the purpose of managing and administering the Plan, including (without
        limitation) the Optionee’s name, home address, telephone number, date of birth, social insurance number, salary, nationality, job title, any Shares or directorships held in the Company and details of all options or any other entitlements to Shares
        awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s favor (the “Data”). The Optionee further understands and acknowledges that the Company and/or its Subsidiaries will transfer
        Data among themselves as necessary for the purpose of implementation, administration and management of the Optionee’s participation in the Plan and that the Company and/or any Subsidiary may each further transfer Data to any third party assisting
        the Company in the implementation, administration and management of the Plan. The Optionee understands and acknowledges that the recipients of Data may be located in the United States or elsewhere. The Optionee authorizes such recipients to
        receive, possess, use, retain and transfer Data, in electronic or other form, for the purpose of administering the Optionee’s participation in the Plan, including a transfer to any broker or other third party with whom the Optionee elects to
        deposit Shares acquired under the Plan of such Data as may be required for the administration of the Plan and/or the subsequent holding of Shares on the Optionee’s behalf. The Optionee may, at any time, view the Data, require any necessary
        modifications of Data or withdraw the consents set forth in this Subsection (i) by contacting the Company in writing.

      

         

      SECTION 14. Definitions.

      

         

      (a) “Agreement” shall mean this Stock Option Agreement.

      

         

      (b) “Board of Directors” shall mean the Board of Directors of the Company, as constituted from time to time or, if a Committee has been appointed, such
        Committee.

      

         

      (c) “Cause” shall mean:

      
        
          


      

      (i) An unauthorized use or disclosure by the Optionee of the Company’s confidential information or trade secrets, which use or disclosure causes material harm to the Company;

      

         

      (ii) A material breach by the Optionee of any agreement between the Optionee and the Company;

      

         

      (iii) A material failure by the Optionee to comply with the Company’s written policies or rules;

      

         

      (iv) The Optionee’s conviction of, or plea of “guilty” or “no contest” to, a felony under the laws of the United States or any State thereof;

      

         

      (v) The Optionee’s gross negligence or willful misconduct;

      

         

      (vi) A continuing failure by the Optionee to perform assigned duties after receiving written notification of such failure from the Board of Directors; or

      

         

      (vii) A failure by the Optionee to cooperate in good faith with a governmental or internal investigation of the Company or its directors, officers or employees, if the Company has requested the
        Optionee’s cooperation.

      

         

      (d) “Change in Control” shall mean (i) the consummation of a merger or consolidation of the Company with or into another entity or (ii) the dissolution,
        liquidation or winding up of the Company. The foregoing notwithstanding, a merger or consolidation of the Company shall not constitute a “Change in Control” if immediately after such merger or consolidation a majority of the voting power of the
        capital stock of the continuing or surviving entity, or any direct or indirect parent corporation of such continuing or surviving entity, will be owned by the persons who were the Company’s shareholders immediately prior to such merger or
        consolidation in substantially the same proportions as their ownership of the voting power of the Company’s capital stock immediately prior to such merger or consolidation.

      

         

      (e) “Company” shall mean Zymergen, Inc., a Delaware corporation.

      

         

      (f) “Good Reason” shall mean that the Optionee resigns within 12 months after one of the following conditions has come into existence without his or her
        consent:

      

         

      (i) A reduction in the Optionee’s base salary by more than 10%;

      

         

      (ii) A material diminution of the Optionee’s authority, duties or responsibilities; or

      

         

      (iii) A relocation of the Optionee’s principal workplace by more than 30 miles.

      

         

      A condition shall not be considered “Good Reason” unless the Optionee gives the Company written notice of such condition within 90 days after such condition comes into existence and the Company
        fails to remedy such condition within 30 days after receiving the Optionee’s written notice.

      

         

      (g) “Immediate Family” shall mean any child, stepchild, grandchild, parent, stepparent, grandparent, spouse, sibling, mother-in-law, father-in-law,
        son-in-law, daughter-in-law, brother-in-law or sister-in-law and shall include adoptive relationships.

      
        
          


      

      (h) “Involuntary Termination” shall mean the termination of the Optionee’s Service by reason of:

      

         

      (i) The involuntary discharge of the Optionee by the Company (or the Parent or Subsidiary employing him or her) for reasons other than Cause; or

      

         

      (ii) The voluntary resignation of the Optionee for Good Reason.

      

         

      (i) “Optionee” shall mean the person named in the Notice of Stock Option Grant.

      

         

      (j) “Plan” shall mean the Zymergen, Inc. 2014 Stock Plan, as in effect on the Date of Grant.

      

         

      (k) “Purchase Price” shall mean the Exercise Price multiplied by the number of Shares with respect to which this option is being exercised.

      

         

      (l) “Right of First Refusal” shall mean the Company’s right of first refusal described in Section 7.

      

         

      (m) “Service” means service as an Employee, Outside Director or Consultant.

      

         

      (n) “Transferee” shall mean any person to whom the Optionee has directly or indirectly transferred any Share
        acquired under this Agreement.

      

         

      (o) “Transfer Notice” shall mean the notice of a proposed transfer of Shares described in Section 7.

      

         

      (p) “U.S. Person” shall mean a person described in Rule 902(k) of Regulation S of the Securities Act (or any successor rule or provision), which generally
        defines a U.S. person as any natural person resident in the United States, any estate of which any executor or administrator is a U.S. Person, or any trust of which of any trustee is a U.S. Person.