August 2, 2011
Jeryl L. Hilleman
c/o Amyris, Inc.
5885 Hollis Street, Suite 100
Emeryville, CA 94608

Dear Jeryl:
This letter sets forth the substance of the separation agreement (the
"Agreement") that Amyris, Inc. (the "Company") is offering to assist you with
your employment transition.
1.SEPARATION. Your last day of active employment with the Company is scheduled
to be June 1, 2012 (the "Scheduled Separation Date"). Between now and the
Scheduled Separation Date you will perform the duties of Chief Financial Officer
of the Company until a successor has been appointed at your current salary of
$360,000 annually. Thereafter you will perform transition services during this
period as designated by the Company (the "Transition Period") at your current
salary of $360,000. If requested by the Company, you agree to continue to
perform services as acting Chief Financial Officer beyond the Scheduled
Separation Date at the same annual salary through December 31, 2012 (the
"Extended Separation Date"). Either you or the Company may terminate your
services for any reason, with or without cause, on or prior to or following the
Scheduled Separation Date (the "Actual Termination Date"). You will participate
in all Company benefit plans for which you are eligible during the Transition
Period. The Company will pay you all salary earned through the Actual
Termination Date, subject to standard payroll deductions and withholdings. You
will also be paid all unused Paid Time Off ("PTO") earned through the Actual
Termination Date, subject to standard payroll deductions and withholdings. You
are entitled to these payments regardless of whether you sign this Agreement. If
your employment is terminated by the Company without Cause prior to the
Scheduled Separation Date, provided you deliver and do not revoke the release in
the form set forth on Exhibit A hereto and the Release becomes effective (the
"Release"), you will also receive a lump sum payment of any unpaid salary that
would have been paid to you through your Scheduled Separation Date had you not
terminated employment on the Actual Termination Date thirty (30) days following
your separation from service (as defined below). You will cease to be a Section
16 officer of the Company on the date your successor is appointed.

For purposes of this Agreement, the term "Cause" shall mean a determination by
the Company that your employment be terminated for any of the following reasons:
(i) willful failure or refusal to comply in any material respect with lawful
policies, standards or regulations of the Company, (ii) a violation of a federal
or state law or regulation applicable to the business of the Company, (iii)
conviction or plea of no contest to a felony under the laws of the United States
or any State, (iv) fraud or misappropriation of property belonging to the
Company or its affiliates, (v) non-performance, non-compliance or interference
with the other party's

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performance of the terms of any confidentiality invention assignment or
proprietary information agreement with the Company or with a former employer
that results in (or is likely to result in) material harm to the Company, (vi)
your willful failure to satisfactorily perform your duties after having received
written notice of such failure and at least thirty (30) days to cure such
failure, or (vii) your misconduct or gross negligence in connection with the
performance of your duties.
2.SEVERANCE. In addition to the payments referenced in Section 1, the Company
will make salary continuation payments over twelve months in the aggregate
amount of $360,000, subject to standard deductions and withholdings and less any
sums owing to the Company. If you deliver the Release, the Company will commence
payment to you of the salary continuation described in this Section 2 on the
first regular payroll date that is thirty (30) days following your separation
from service (as defined below). The first payment thereof will include a
catch-up payment covering the amount that would have otherwise been paid during
the period between your termination of employment and the first payment date but
for the application of this provision, and the balance of the installments will
be payable over the remainder of the twelve month period.

3.BONUS. You (or upon your death or disability, your beneficiary) will receive
your full 2011 annual bonus ($100,000) regardless of performance in accordance
with our standard bonus payout, but not later than March 15, 2011. You will also
be entitled to receive a bonus payment of up to $100,000 for 2012 (the "2012
Bonus") as described below, regardless of performance, within thirty (30) days
following your Actual Termination Date, provided you (i) remain employed after
December 31, 2011and (ii) sign the Release following the Actual Termination Date
and the Release becomes effective. The 2012 Bonus will be prorated based on the
number of days that you remain employed by the Company during two periods of
2012, with $50,000 of the 2012 Bonus allocated to the period from January 1,
2012 through the Scheduled Separation Date (the "First 2012 Period"), and, if
applicable, $50,000 of the 2012 Bonus allocated to the period from June 2, 2012
through the Extended Separation Date (subject to the Company's decision on
whether to request your services through the Extended Separation Date) (the
"Second 2012 Period"). If you are terminated by the Company without Cause before
or during the First 2012 Period, you will be entitled to receive the full amount
of the portion of the 2012 Bonus allocated to the First 2012 Period as described
(and subject to the Release and other conditions provided) above in this
section. If you are terminated by the Company without Cause during the Second
2012 Period (if applicable) you will be entitled to receive the full 2012 Bonus
as described (and subject to the Release and other conditions provided) above in
this section.

4.EQUITY. Pursuant to the terms of your equity award agreements, vesting and
exercisability of your stock options ("Options") will continue during your
employment and vesting shall cease on the Actual Termination Date. You are
allowed to exercise your vested stock options during the time period set forth
in your Option agreements following the Actual Separation Date. The Company will
accelerate the vesting and exercisability of all outstanding and unexercised and
early exercised Options from grants I100194, N100194 and 100663 (collectively,
the "Initial Grants") on your Actual Termination Date, provided you (i) remain

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employed until your Scheduled Separation Date or are terminated without Cause
prior to your Scheduled Separation Date and (ii) deliver the Release, and such
Options may be exercised pursuant to (and in accordance with the
post-termination exercise periods in) the terms of the applicable option
agreement. All other unvested Options granted to you shall terminate on your
Actual Termination Date, except with respect to any additional Options that
become vested as provided in the next paragraph of this section.

In addition, to the extent applicable, if you continue to perform the services
hereunder after the Scheduled Separation Date and through the Extended
Separation Date or are terminated without Cause during such period, the Company
will accelerate the vesting and exercisability of outstanding and unexercised
and early exercised Options from Initial Grants as provided for above in this
section, plus additional shares from grants 100747 and 101065 such that you will
receive acceleration of vesting of an aggregate of 50,668 unvested shares
subject to all of your Options (or all remaining unvested shares if your total
unvested shares subject to Options are less than 50,668 as of your Actual
Termination Date), with such acceleration applying first to the Initial Grants,
then to grant 100747 and then to grant 101065, on your Actual Termination Date
provided you deliver the Release, and such Options may be exercised pursuant to
(and in accordance with the post-termination exercise periods in) the terms of
the applicable option agreement. All other unvested Options granted to you shall
terminate on your Actual Termination Date.
5.HEALTH COVERAGE. As provided by the federal COBRA law and by the Company's
current group health plan, you will be eligible to continue your health benefits
following the Separation Date. Our COBRA administrator will mail a COBRA
enrollment packet to your home within 30 days of your last day of employment.
You will have 60 days from date of notification to elect COBRA coverage. Should
you timely elect COBRA, your COBRA coverage will take effect retroactive to the
date your current coverage as an active employee ceased. You must send in your
enrollment forms to our COBRA administrator to activate coverage. You are
entitled to COBRA coverage whether or not you sign this Agreement. If you elect
continued coverage under COBRA, the Company will pay your COBRA premiums for
twelve (12) calendar months after the Scheduled Separation Date as part of this
Agreement. The Company's obligation to make these payments will cease
immediately if you become eligible for other health benefits at the expense of
another employer. You agree to immediately provide the Company written notice of
the availability of health coverage within that time period. The Company will
pay your (but not your beneficiaries' COBRA premiums), provided you sign the
Release and the Release becomes effective.

6.OTHER COMPENSATION OR BENEFITS. You acknowledge that, except as expressly
provided in this Agreement, you will not receive nor are you entitled to receive
any additional compensation, severance or benefits after your Actual Termination
Date. You recognize and agree that your employment relationship with the Company
is permanently and irrevocably severed and the Company has no obligation,
contractual or otherwise, to hire, re-hire or re-employ you in the future.

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7.EXPENSE REIMBURSEMENTS. Within ten (10) days of your Actual Termination Date,
you will submit your final documented expense reimbursement statement reflecting
any and all authorized business expenses you incurred through your Actual
Termination Date for which you seek reimbursement. The Company will reimburse
you for such expenses pursuant to its regular business practice.

8.RETURN OF COMPANY PROPERTY. By your Actual Termination Date, you will return
to the Company all Company documents (and all copies thereof) and other Company
property and materials in your possession, or your control, including, but not
limited to, Company files, laptop, Blackberry, notes, memoranda, correspondence,
lists, drawings, records, plans and forecasts, financial information, personnel
information, customer and customer prospect information, sales and marketing
information, product development and pricing information, specifications,
computer-recorded information, tangible property, credit cards, entry cards,
identification badges and keys; and any materials of any kind which contain or
embody any proprietary or confidential material of the Company (and all
reproductions thereof) You will be permitted to retain your current iPhone and
iPhone telephone number.

9.PROPRIETARY INFORMATION OBLIGATIONS. You acknowledge your continuing
obligations under your Employee Proprietary Information and Inventions Agreement
which include but are not limited to the obligation to refrain from any
unauthorized use or disclosure of any confidential or proprietary information of
the Company. As well as the obligation to not solicit (directly or indirectly)
the Company's employees for a period of one year (12 months). Failure to comply
with this provision shall be a material breach of this Agreement. A copy of your
Employee Proprietary Information and Inventions Agreement is available upon
request.

10.NONDISPARAGEMENT. You agree not to disparage the Company, or the Company's
officers, directors, employees, shareholders and agents, affiliates and
subsidiaries in any manner likely to be harmful to them or their business,
business reputation or personal reputation; provided that you will respond
accurately and fully to any question, inquiry or request for information when
required by legal process. The Company agrees that the officers and directors
will refrain from making statements that disparage your reputation. Failure to
comply with this provision shall be a material breach of this Agreement.

11.MISCELLANEOUS. This Agreement, including all exhibits, constitutes the
complete, final and exclusive embodiment of the entire agreement between you and
the Company with regard to this subject matter. It is entered into without
reliance on any promise or representation, written or oral, other than those
expressly contained herein, and it supersedes any other such promises,
warranties or representations, prior agreements and communications, whether oral
or written, as to the specific subjects of this letter by and between you and
the Company. This Agreement may not be modified or amended except in writing
signed by both you and a duly authorized officer of the Company. This Agreement
will bind the heirs, personal representatives, successors and assigns of both
you and the Company, and inure to the benefit of both you and the Company, their
heirs, successors and assigns. If any provision of this Agreement is determined
to be invalid or unenforceable, in whole or in part, this determination will not
affect any other provision of this Agreement and the provision

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in question will be modified by the court so as to be rendered enforceable. No
waiver by the Company of any right under this Agreement shall be construed as a
waiver of any other right, nor shall any waiver by the Company of any breach of
this Agreement be a waiver of any preceding or succeeding breach.

12.SECTION 409A. For purposes of Section 409A of the Internal Revenue Code of
1986, as amended (the "Code"), each salary continuation payment under Section 2
is hereby designated as a separate payment.  If the Company determines that you
are a "specified employee" under Section 409A(a)(2)(B)(i) of the Code at the
time of your separation from service (as defined below), then (i) the salary
continuation payments under this Agreement, to the extent that they are subject
to Section 409A of the Code, will commence during the seventh month after your
separation from service (ii) the installments that otherwise would have been
paid during the first six months after your separation from service will be paid
in a lump sum when the salary continuation payments commence and (iii) any other
payments or benefits to which you become entitled under this Employment
Agreement, or under any agreement or plan referenced herein, in connection with
your separation from service that constitute deferred compensation subject to
Section 409A of the Code, shall not be made or commence until the earliest of
(i) the expiration of the six (6) month period measured separation from service;
or (ii) the date of your death following such separation from service; provided,
however, that such deferral shall only be effected to the extent required to
avoid adverse tax treatment to you, including (without limitation) the
additional twenty percent (20%) tax for which you would otherwise be liable
under Section 409A(a)(1)(B) of the Code in the absence of such deferral.  Upon
the expiration of the applicable deferral period, any payments which would have
otherwise been made during that period (whether in a single sum or in
installments) in the absence of this paragraph shall be paid to you or your
beneficiary in one lump sum (without interest).

Any termination of your employment is intended to constitute a "separation from
service" and will be determined consistent with the rules relating to a
"separation from service" as such term is defined in Treasury Regulation Section
1.409A-1. To the extent that any provision of this Agreement is ambiguous as to
its compliance with Section 409A of the Code, the provision will be read in such
a manner so that all payments hereunder comply with Section 409A of the Code. 
Except as otherwise expressly provided herein, to the extent any expense
reimbursement or the provision of any in-kind benefit under this Agreement is
determined to be subject to Section 409A of the Code, the amount of any such
expenses eligible for reimbursement, or the provision of any in-kind benefit, in
one calendar year shall not affect the expenses eligible for reimbursement in
any other taxable year (except for any lifetime or other aggregate limitation
applicable to medical expenses), in no event shall any expenses be reimbursed
after the last day of the calendar year following the calendar year in which you
incurred such expenses, and in no event shall any right to reimbursement or the
provision of any in-kind benefit be subject to liquidation or exchange for
another benefit.
Upon acceptance of this Agreement, within the timeframe specified above, please
sign below and return the executed original to me. Upon your signature below,
this will become our binding agreement with respect to your separation from the
Company and its terms merging

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and superseding in their entirety all other or prior agreements and
communications, whether written or oral, by you and the Company as to the
specific subjects of this Agreement.
13.Effective Date; Choice of Law. This Agreement shall be effective on the date
it is executed by the parties. This Agreement will be deemed to have been
entered into and will be construed and enforced in accordance with the laws of
the State of California as applied to contracts made and to be performed
entirely within California.

Amyris, Inc.
By: /s/ John G. Melo
John G. Melo                Chief Executive Officer

I UNDERSTAND AND AGREE TO THE TERMS CONTAINED IN THIS AGREEMENT AND INTEND, BY
MY SIGNATURE BELOW, TO BE LEGALLY BOUND BY THOSE TERMS. I AM SIGNING THIS
RELEASE KNOWINGLY, WILLINGLY AND VOLUNTARILY IN EXCHANGE FOR THE SEVERANCE
BENEFITS DESCRIBED ABOVE:
/s/ Jeryl L. Hilleman        Date: 8-2-11                
Jeryl L. Hilleman

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Exhibit A
Release

In consideration of the severance benefits (the "Severance Benefits") offered to
me by Amyris, Inc. (the "Employer") pursuant to my Agreement with Employer dated
_________, 2011 (the "Agreement") and in connection with the termination of my
employment, I agree to the following general release (the "Release").
1.On behalf of myself, my heirs, executors, administrators, successors, and
assigns, I hereby fully and forever generally release and discharge Employer,
its current, former and future parents, subsidiaries, affiliated companies,
related entities, employee benefit plans, and their fiduciaries, predecessors,
successors, officers, directors, shareholders, agents, employees and assigns
(collectively, the "Company") from any and all claims, causes of action, and
liabilities up through the date of my execution of the Release.  The claims
subject to this release include, but are not limited to, those relating to my
employment with Employer and/or any predecessor or successor to Employer and the
termination of such employment.  All such claims (including related attorneys'
fees and costs) are barred without regard to whether those claims are based on
any alleged breach of a duty arising in statute, contract, or tort.  This
expressly includes waiver and release of any rights and claims arising under any
and all laws, rules, regulations, and ordinances, including, but not limited to:
Title VII of the Civil Rights Act of 1964; the Older Workers Benefit Protection
Act; the Americans With Disabilities Act; the Age Discrimination in Employment
Act; the Fair Labor Standards Act; the National Labor Relations Act; the Family
and Medical Leave Act; the Employee Retirement Income Security Act of 1974, as
amended ("ERISA"); the Workers Adjustment and Retraining Notification Act; the
California Fair Employment and Housing Act (if applicable); the provisions of
the California Labor Code (if applicable); the Equal Pay Act of 1963; and any
similar law of any other state or governmental entity.  The parties agree to
apply California law in interpreting the Release.  Accordingly, I further waive
any rights under Section 1542 of the Civil Code of the State of California or
any similar state statute.  Section 1542 states: "A general release does not
extend to claims which the creditor does not know or suspect to exist in his
favor at the time of executing the release, which, if known to him, must have
materially affected his settlement with the debtor."

2.This Release does not extend to, and has no effect upon, any benefits that
have accrued, and to which I have become vested, under any employee benefit plan
within the meaning of ERISA sponsored by the Company.

3.In understanding the terms of the Release and my rights, I have been advised
to consult with an attorney of my choice prior to executing the Release.  I
understand that nothing in this Release is intended to constitute an unlawful
release or waiver of any of my rights under any laws and/or to prevent, impede,
or interfere with my ability and/or rights, if any:  (a) under applicable
workers' compensation laws; (b) to seek unemployment benefits; (c) to file a
charge or complaint with a government agency such as but not limited to the
Equal Employment Opportunity Commission, the National Labor Relations Board, or
any applicable state agency;

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(d) provide truthful testimony if under subpoena to do so, (e) file a claim with
any state or federal agency or to participate or cooperate in such a matter,
and/or (f) to challenge the validity of this release.  Furthermore,
notwithstanding any provisions and covenants herein, the Release shall not waive
(a) any rights to indemnification I may have as an officer of Employer or
otherwise in connection with my employment with Employer, under Employer's
bylaws or other governing instruments or any agreement addressing such subject
matter between Employer and me (including any fiduciary insurance policy
maintained by Employer under which I am covered) or under any merger or
acquisition agreement addressing such subject matter, (b) any obligations owed
to me pursuant to the Agreement, (c) my rights of insurance under any liability
policy covering Employer's officers (in addition to the rights under subsection
(a) above), or (d) any accrued but unpaid wages; any reimbursement for business
expenses pursuant to Employer's policies for such reimbursements, any
outstanding claims for benefits or payments under any benefit plans of Employer
or subsidiaries, any accrued but unused vacation, any ongoing agreements
evidencing outstanding equity awards granted to me, any obligations owed to me
pursuant to the terms of outstanding written agreements between myself and
Employer and any claims I may not release as a matter of law, including
indemnification claims under applicable law. To the fullest extent permitted by
law, any dispute regarding the scope of this general release shall be resolved
through binding arbitration pursuant to Section 11 below, and the arbitration
provision set forth in the Agreement.

4.I understand and agree that Employer will not provide me with the Severance
Benefits unless I execute the Release.  I also understand that I have received
or will receive, regardless of the execution of the Release, all wages owed to
me together with any accrued but unused vacation pay, less applicable
withholdings and deductions, earned through my termination date.

5.As part of my existing and continuing obligations to Employer, I have returned
to Employer all documents (and all copies thereof) and other property belonging
to Employer that I have had in my possession at any time, including but not
limited to files, notes, drawings, records, business plans and forecasts,
financial information, specification, computer-recorded information, tangible
property (including, but not limited to, computers, laptops, pagers, etc.),
credit cards, entry cards, identification badges and keys; and any materials of
any kind which contain or embody any proprietary or confidential information of
Employer (and all reproductions thereof).  I understand that, even if I did not
sign the Release, I am still bound by any and all confidential/proprietary/trade
secret information, non-disclosure and inventions assignment agreement(s) signed
by me in connection with my employment with Employer, or with a predecessor or
successor of Employer, pursuant to the terms of such agreement(s).

6.I represent and warrant that I am the sole owner of all claims relating to my
employment with Employer and/or with any predecessor of Employer, and that I
have not assigned or transferred any claims relating to my employment to any
other person or entity.

7.I agree to keep the Severance Benefits and the provisions of this Release
confidential and not to reveal their contents to anyone except my lawyer, my
spouse or other

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immediate family member, and/or my financial consultant, or as required by legal
process or applicable law.

8.I understand and agree that the Release shall not be construed at any time as
an admission of liability or wrongdoing by either the Company or me.

9.I understand and agree that the Release shall not be construed at any time as
an admission of liability or wrongdoing by either the Company or myself.

10.I agree that I will not make any negative or disparaging statements or
comments, either as fact or as opinion, about the Company, its employees,
officers, directors, shareholders, vendors, products or services, business,
technologies, market position or performance. Nothing in this paragraph shall
prohibit me from providing truthful information in response to a subpoena or
other legal process.

11.Any controversy or any claim arising out of or relating to the
interpretation, enforceability or breach of the Release shall be settled by
arbitration in accordance with the arbitration provision of the Agreement.  If
for any reason the arbitration procedure set forth in the Agreement is
unavailable, I agree to arbitration under the employment arbitration rules of
the American Arbitration Association or any successor hereto.  The parties
further agree that the arbitrator shall not be empowered to add to, subtract
from, or modify, alter or amend the terms of the Release.  Any applicable
arbitration rules or policies shall be interpreted in a manner so as to ensure
their enforceability under applicable state or federal law.

12.I agree that I have had at least twenty-one (21) calendar days in which to
consider whether to execute the Release, no one hurried me into executing the
Release during that period, and no one coerced me into executing the Release.  I
understand that the offer of the Severance Benefits and the Release shall expire
on the twenty-second (22nd) calendar day after my employment termination date if
I have not accepted it by that time.  I further understand that Employer's
obligations under the Release shall not become effective or enforceable until
the eighth (8th) calendar day after the date I sign the Release provided that I
have timely delivered it to Employer (the "Effective Date") and that in the
seven (7) day period following the date I deliver a signed copy of the Release
to Employer I understand that I may revoke my acceptance of the Release.  I
understand that the Severance Benefits will become available to me after the
Effective Date.

13.In executing the Release, I acknowledge that I have not relied upon any
statement made by Employer, or any of its representatives or employees, with
regard to the Release unless the representation is specifically included
herein.  Furthermore, the Release and the Agreement contain our entire
understanding regarding eligibility for and the payment of severance benefits
and supersedes any or all prior representations and agreements regarding the
subject matter.  Once effective and enforceable, this agreement can only be
changed by another written agreement signed by me and an authorized
representative of Employer.

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14.Should any provision of the Release be determined by an arbitrator, court of
competent jurisdiction, or government agency to be wholly or partially invalid
or unenforceable, the legality, validity and enforceability of the remaining
parts, terms, or provisions are intended to remain in full force and effect.
Specifically, should a court, arbitrator, or agency conclude that a particular
claim may not be released as a matter of law, it is the intention of the parties
that the general release and the waiver of unknown claims above shall otherwise
remain effective to release any and all other claims.  I acknowledge that I have
obtained sufficient information to intelligently exercise my own judgment
regarding the terms of the Release before executing the Release.

[Signature Page to General Release Agreement Follows]

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EXECUTIVE'S ACCEPTANCE OF RELEASE
BEFORE SIGNING MY NAME TO THE RELEASE, I STATE THE FOLLOWING:  I HAVE READ THE
RELEASE, I UNDERSTAND IT AND I KNOW THAT I AM GIVING UP IMPORTANT RIGHTS.  I
HAVE OBTAINED SUFFICIENT INFORMATION TO INTELLIGENTLY EXERCISE MY OWN JUDGMENT.
I HAVE BEEN ADVISED THAT I SHOULD CONSULT WITH AN ATTORNEY BEFORE SIGNING IT,
AND I HAVE SIGNED THE RELEASE KNOWINGLY AND VOLUNTARILY.

Date delivered to employee ___________, ______.
Executed this ______ day of _______________, ______.

____________________________________
Signature
____________________________________
Name (Please Print)

[Signature Page to General Release Agreement]

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