Document:

Letter from Willard W. Brittain, Jr. to Peter T. Grauer

 Exhibit 10.6 
 Willard W. Brittain 
 58 Beech Hollow Lane 
 Princeton, NJ 08540 
 (609) 430-1249

 wbrittain@preod.com 
 March 19,
2007 
 Mr. Peter T. Grauer  
 Lead Independent
Director 
 DaVita, Inc. 
 601 Hawaii Street 
 El Segundo, CA 90245 
 Dear Peter: 
 This is to confirm my agreement to resign as a director of DaVita, Inc. (the “Company”) if the Audit Committee of the Company should decide to
retain PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm and if PricewaterhouseCoopers LLP would not otherwise be considered “independent” under the rules of the Securities Exchange Commission.

  

	
	Very truly yours,
	
	/s/ Willard W. Brittain
	Willard W. Brittain2000 Equity Incentive Plan

 Exhibit 10.1 
 EXELIXIS, INC. 
 2000 EQUITY INCENTIVE PLAN 
 Adopted January 27, 2000 
 Approved By Stockholders March 15, 2000 

Amended and Restated December 8, 2006 
 Termination Date: January 26, 2010 
 1. PURPOSES. 
 (a) Eligible Stock Award Recipients. The persons eligible to receive Stock Awards are the Employees, Directors and Consultants of the Company and its Affiliates. 
 (b) Available Stock Awards. The purpose of the Plan is to provide a means by which eligible recipients of Stock Awards may be given an opportunity to
benefit from increases in value of the Common Stock through the granting of the following Stock Awards: (i) Incentive Stock Options, (ii) Nonstatutory Stock Options, (iii) stock bonuses and (iv) rights to acquire restricted
stock. 
 (c) General Purpose. The Company, by means of the Plan, seeks to retain the services of the group of persons eligible to receive
Stock Awards, to secure and retain the services of new members of this group and to provide incentives for such persons to exert maximum efforts for the success of the Company and its Affiliates. 
 2. DEFINITIONS. 
 (a) “Affiliate” means any parent
corporation or subsidiary corporation of the Company, whether now or hereafter existing, as those terms are defined in Sections 424(e) and (f), respectively, of the Code. 
 (b) “Board” means the Board of Directors of the Company. 
 (c) “Calculation Date” means
the last day of each fiscal year of the Company. 
 (d) “Cause” means, with respect to the involuntary termination of the
Continuous Service of a Participant, misconduct, including: (i) conviction of any felony or any crime involving moral turpitude or dishonesty; (ii) participation in a fraud or act of dishonesty against the Company or an Affiliate;
(iii) conduct that, based upon a good faith and reasonable factual investigation and determination by the Company, demonstrates gross unfitness to serve; or (iv) intentional, material violation of any agreement with the 

  

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Company, or of any statutory duty to the Company, that is not corrected within thirty (30) days after written notice thereof. Physical or mental
disability shall not constitute “Cause.” For purposes of this definition, “Company” shall include an Affiliate of the Company and a successor to the Company. 
 (e) “Code” means the Internal Revenue Code of 1986, as amended. 
 (f) “Committee” means a committee of one or more members of the Board appointed by the Board in accordance with subsection 3(c). 
 (g) “Common Stock” means the common stock of the Company. 
 (h) “Company” means
Exelixis, Inc., a Delaware corporation. 
 (i) “Consultant” means any person, including an advisor, (i) engaged by the Company
or an Affiliate to render consulting or advisory services and who is compensated for such services or (ii) who is a member of the Board of Directors of an Affiliate. However, the term “Consultant” shall not include either Directors
who are not compensated by the Company for their services as Directors or Directors who are merely paid a director’s fee by the Company for their services as Directors. 
 (j) “Continuous Service” means that the Participant’s service with the Company or an Affiliate, whether as an Employee, Director or
Consultant, is not interrupted or terminated. The Participant’s Continuous Service shall not be deemed to have terminated merely because of a change in the capacity in which the Participant renders service to the Company or an Affiliate as an
Employee, Consultant or Director or a change in the entity for which the Participant renders such service, provided that there is no interruption or termination of the Participant’s Continuous Service. If the entity for which a Participant is
rendering services ceases to qualify as an “Affiliate,” as determined by the Board in its sole discretion, such Participant’s Continuous Service shall be considered to have terminated on the date such entity ceases to qualify as an
Affiliate. For example, a change in status from an Employee of the Company to a Consultant of an Affiliate or a Director will not constitute an interruption of Continuous Service. The Board or the chief executive officer of the Company, in that
party’s sole discretion, may determine whether Continuous Service shall be considered interrupted in the case of any leave of absence approved by that party, including sick leave, military leave or any other personal leave. 
 (k) “Covered Employee” means the chief executive officer and the four (4) other highest compensated officers of the Company for whom total
compensation is required to be reported to stockholders under the Exchange Act, as determined for purposes of Section 162(m) of the Code. 
 (l) “Diluted Shares Outstanding” means the number of outstanding shares of 

  

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Common Stock on the Calculation Date, plus the number of shares of Common Stock issuable on the Calculation Date assuming the conversion of all outstanding
preferred stock and convertible notes, and the additional number of dilutive Common Stock equivalent shares outstanding as the result of any options or warrants outstanding during the fiscal year, calculated using the treasury stock method.

 (m) “Director” means a member of the Board of Directors of the Company. 
 (n) “Disability” means the permanent and total disability of a person within the meaning of Section 22(e)(3) of the Code. 
 (o) “Employee” means any person employed by the Company or an Affiliate. Mere service as a Director or payment of a director’s fee by the
Company or an Affiliate shall not be sufficient to constitute “employment” by the Company or an Affiliate. 
 (p) “Exchange
Act” means the Securities Exchange Act of 1934, as amended. 
 (q) “Fair Market Value” means, as of any date, the value of the
Common Stock determined as follows: 
 (i) If the Common Stock is listed on any established stock exchange or national market system, the Fair
Market Value of a share of Common Stock shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Common
Stock) on the day of determination, as reported in The Wall Street Journal or such other source as the Board deems reliable. 
 (ii) If there
is no closing sales price for the Common Stock on the day of determination, then the Fair Market Value shall be the closing sales price on the last preceding day for which such quotation exists. 
 (iii) In the absence of an established market for the Common Stock, the Fair Market Value shall be determined in good faith by the Board. 
 (r) “Good Reason” means, with respect to the voluntary termination of the Continuous Service of a Participant in connection with a Change in
Control, (i) reduction of such person’s rate of compensation as in effect immediately prior to the Change in Control by greater than ten percent (10%), except to the extent the compensation of other similarly situated persons are accordingly
reduced, (ii) failure to provide a package of welfare benefit plans that, taken as a whole, provide substantially similar benefits to those in which such person is entitled to participate immediately prior to the Change in Control (except that such
person’s contributions may be raised to the extent of any cost increases imposed by third parties) or any action by the Company that would adversely 

  

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affect such person’s participation or reduce such person’s benefits under any of such plans, (iii) a change in such person’s
responsibilities, authority, titles or offices resulting in diminution of position, excluding for this purpose an isolated, insubstantial and inadvertent action not taken in bad faith that is remedied by the Company promptly after notice thereof is
given by such person, (iv) a request that such person relocate to a worksite that is more than fifty (50) miles from such person’s prior worksite, unless such person accepts such relocation opportunity, (v) a material reduction in duties,
(vi) a failure or refusal of any successor company to assume the obligations of the Company under an agreement with such person or (vii) a material breach by the Company of any of the material provisions of an agreement with such person.
For purposes of this definition, “Company” shall include an Affiliate of the Company and a successor to the Company. 
 (s)
“Incentive Stock Option” means an Option which qualifies as an incentive stock option within the meaning of Section 422 of the Code and the regulations promulgated thereunder. 
 (t) “Non-Employee Director” means a Director who either (i) is not a current Employee or Officer of the Company or its parent or a
subsidiary, does not receive compensation (directly or indirectly) from the Company or its parent or a subsidiary for services rendered as a consultant or in any capacity other than as a Director (except for an amount as to which disclosure would
not be required under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act (“Regulation S-K”)), does not possess an interest in any other transaction as to which disclosure would be required under Item 404(a) of
Regulation S-K and is not engaged in a business relationship as to which disclosure would be required under Item 404(b) of Regulation S-K; or (ii) is otherwise considered a “non-employee director” for purposes of Rule 16b-3.

 (u) “Nonstatutory Stock Option” means an Option which does not qualify as an Incentive Stock Option. 
 (v) “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. 
 (w) “Option” means an Incentive Stock Option or a Nonstatutory Stock Option granted pursuant
to the Plan. 
 (x) “Option Agreement” means a written agreement between the Company and an Optionholder evidencing the terms and
conditions of an individual Option grant. Each Option Agreement shall be subject to the terms and conditions of the Plan. 
 (y)
“Optionholder” means a person to whom an Option is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Option. 
  

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 (z) “Outside Director” means a Director who either (i) is not a current employee of the
Company or an “affiliated corporation” (within the meaning of Treasury Regulations promulgated under Section 162(m) of the Code), is not a former employee of the Company or an “affiliated corporation” receiving compensation
for prior services (other than benefits under a tax qualified pension plan), was not an officer of the Company or an “affiliated corporation” at any time and is not currently receiving direct or indirect remuneration from the Company or an
“affiliated corporation” for services in any capacity other than as a Director or (ii) is otherwise considered an “outside director” for purposes of Section162(m) of the Code. 
 (aa) “Participant” means a person to whom a Stock Award is granted pursuant to the Plan or, if applicable, such other person who holds an
outstanding Stock Award. 
 (bb) “Plan” means this Exelixis, Inc. 2000 Equity Incentive Plan. 
 (cc) “Rule 16b-3” means Rule 16b-3 promulgated under the Exchange Act or any successor to Rule 16b-3, as in effect from time to time.

 (dd) “Securities Act” means the Securities Act of 1933, as amended. 
 (ee) “Stock Award” means any right granted under the Plan, including an Option, a stock bonus and a right to acquire restricted stock.

 (ff) “Stock Award Agreement” means a written agreement between the Company and a holder of a Stock Award evidencing the terms
and conditions of an individual Stock Award grant. Each Stock Award Agreement shall be subject to the terms and conditions of the Plan. 
 (gg) “Ten Percent Stockholder” means a person who owns (or is deemed to own pursuant to Section 424(d) of the Code) stock possessing more than ten percent (10%) of the total combined voting power of all classes of stock of
the Company or of any of its Affiliates. 
 3. ADMINISTRATION. 
 (a) Administration by Board. The Board shall administer the Plan unless and until the Board delegates administration to a Committee, as provided in subsection 3(c). 
 (b) Powers of Board. The Board shall have the power, subject to, and within the limitations of, the express provisions of the Plan: 
 (i) To determine from time to time which of the persons eligible under the Plan shall be granted Stock Awards; when and how each Stock Award shall be

  

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granted; what type or combination of types of Stock Award shall be granted; the provisions of each Stock Award granted (which need not be identical),
including the time or times when a person shall be permitted to receive Common Stock pursuant to a Stock Award; and the number of shares of Common Stock with respect to which a Stock Award shall be granted to each such person. 
 (ii) To construe and interpret the Plan and Stock Awards granted under it, and to establish, amend and revoke rules and regulations for its
administration. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the Plan or in any Stock Award Agreement, in a manner and to the extent it shall deem necessary or expedient to make the Plan fully
effective. 
 (iii) To amend the Plan or a Stock Award as provided in Section 12. 
 (iv) Generally, to exercise such powers and to perform such acts as the Board deems necessary or expedient to promote the best interests of the Company
which are not in conflict with the provisions of the Plan. 
 (c) Delegation to Committee. 
 (i) General. The Board may delegate administration of the Plan to a Committee or Committees of one (1) or more members of the Board, and the term
“Committee” shall apply to any person or persons to whom such authority has been delegated. If administration is delegated to a Committee, the Committee shall have, in connection with the administration of the Plan, the powers theretofore
possessed by the Board, including the power to delegate to a subcommittee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board shall thereafter be to the Committee or subcommittee),
subject, however, to such resolutions, not inconsistent with the provisions of the Plan, as may be adopted from time to time by the Board. The Board may abolish the Committee at any time and revest in the Board the administration of the Plan.

 (ii) Committee Composition when Common Stock is Publicly Traded. At such time as the Common Stock is publicly traded, in the discretion of
the Board, a Committee may consist solely of two or more Outside Directors, in accordance with Section 162(m) of the Code, and/or solely of two or more Non-Employee Directors, in accordance with Rule 16b-3. Within the scope of such authority,
the Board or the Committee may (1) delegate to a committee of one or more members of the Board who are not Outside Directors the authority to grant Stock Awards to eligible persons who are either (a) not then Covered Employees and are not
expected to be Covered Employees at the time of recognition of income resulting from such Stock Award or (b) not persons with respect to whom the Company wishes to comply with Section 162(m) of the Code, and/or (2) delegate to a committee
of one or more members of the Board who are not Non-Employee Directors the authority to grant Stock Awards to eligible persons who are not then subject to Section 16 of the Exchange Act. 
  

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 (iii) Delegation to Officers. The Board may delegate to one or more Officers the authority to do one or
both of the following (a) designate Officers and Employees of the Company or any of its subsidiaries to be recipients of Options (and, to the extent permitted by Delaware law, other Stock Awards) and the terms thereof, and (b) determine
the number of shares of Common Stock to be subject to such Stock Awards granted to such Officers and Employees; provided, however, that the Board resolutions regarding such delegation shall specify the total number of shares of Common Stock that may
be subject to the Stock Awards granted by such Officers and that such Officer may not grant a Stock Award to himself or herself. Notwithstanding the foregoing, the Board may not delegate to an Officer authority to determine the Fair Market Value of
the Common Stock pursuant to subsection 2(q)(iii) above. 
 (d) Effect of Board’s Decision. All determinations, interpretations and
constructions made by the Board in good faith shall not be subject to review by any person and shall be final, binding and conclusive on all persons. 
 4.
SHARES SUBJECT TO THE PLAN. 
 (a) Share Reserve. Subject to the provisions of subsection 4(b) relating to automatic increases to the share
reserve, the provisions of subsection 4(c) relating to reversion of shares of Common Stock to the share reserve and the provisions of Section 11 relating to adjustments upon changes in the Common Stock, the Common Stock that may be issued
pursuant to Stock Awards shall not exceed in the aggregate three million (3,000,000) shares of Common Stock. 
 (b) Automatic Increase.
For a period of ten (10) years, the share reserve specified in subsection 4(a) automatically shall be increased on the Calculation Date by the greater of that number of shares of Common Stock equal to five percent (5%) of the Diluted
Shares Outstanding or that number of shares of Common Stock that have been made subject to Stock Awards granted under the Plan during the prior 12-month period; provided, however, that the Board may provide for a lesser number at any time prior to
the Calculation Date and provided further that such automatic share reserve increases in the aggregate that are available for Incentive Stock Options shall not exceed thirty million (30,000,000) shares of Common Stock. 
 (c) Reversion of Shares to the Share Reserve. If any Stock Award shall for any reason expire or otherwise terminate, in whole or in part, without having
been exercised in full, the shares of Common Stock not acquired under such Stock Award shall revert to and again become available for issuance under the Plan. If the Company repurchases any unvested shares of Common Stock acquired under the Plan,
the repurchased shares of Common Stock shall revert to and again become available for issuance under the Plan for all Stock Awards other than Incentive Stock Options. 
  

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 (d) Source of Shares. The shares of Common Stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise. 
 5. ELIGIBILITY. 
 (a) Eligibility for Specific Stock Awards. Incentive Stock Options may be granted only to Employees. Stock Awards other than Incentive Stock Options may be granted to Employees, Directors and Consultants. 

(b) Ten Percent Stockholders. 
 (i) A Ten
Percent Stockholder shall not be granted an Incentive Stock Option unless the exercise price of such Option is at least one hundred ten percent (110%) of the Fair Market Value of the Common Stock at the date of grant and the Option is not
exercisable after the expiration of five (5) years from the date of grant. 
 (c) Section 162(m) Limitation. Subject to the
provisions of Section 11 relating to adjustments upon changes in the shares of Common Stock, no Employee shall be eligible to be granted Options covering more than one million (1,000,000) Shares of Common Stock during any calendar year.

 (d) Consultants. 
 (i) A
Consultant shall not be eligible for the grant of a Stock Award if, at the time of grant, a Form S-8 Registration Statement under the Securities Act (“Form S-8”) is not available to register either the offer or the sale of the
Company’s securities to such Consultant because of the nature of the services that the Consultant is providing to the Company, or because the Consultant is not a natural person, or as otherwise provided by the rules governing the use of Form
S-8, unless the Company determines both (1) that such grant (a) shall be registered in another manner under the Securities Act (e.g., on a Form S-3 Registration Statement) or (b) does not require registration under the Securities Act
in order to comply with the requirements of the Securities Act, if applicable, and (2) that such grant complies with the securities laws of all other relevant jurisdictions. 
 (ii) Form S-8 generally is available to consultants and advisors only if (1) they are natural persons; (2) they provide bona fide services to
the issuer, its parents, its majority-owned subsidiaries or majority-owned subsidiaries of the issuer’s parent; and (3) the services 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 issuer’s securities. 
  

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 6. OPTION PROVISIONS. 
 Each Option shall be in such form and shall contain such terms and conditions as the Board shall deem appropriate. All Options shall be separately designated Incentive Stock Options or Nonstatutory Stock Options at
the time of grant, and, if certificates are issued, a separate certificate or certificates will be issued for shares of Common Stock purchased on exercise of each type of Option. The provisions of separate Options need not be identical, but each
Option shall include (through incorporation of provisions hereof by reference in the Option or otherwise) the substance of each of the following provisions: 
 (a) Term. Subject to the provisions of subsection 5(b) regarding Ten Percent Stockholders, no Incentive Stock Option granted shall be exercisable after the expiration of ten (10) years from the date it was
granted. 
 (b) Exercise Price of an Incentive Stock Option. Subject to the provisions of subsection 5(b) regarding Ten Percent Stockholders,
the exercise price of each Incentive Stock Option shall be not less than one hundred percent (100%) of the Fair Market Value of the Common Stock subject to the Option on the date the Option is granted. Notwithstanding the foregoing, an
Incentive Stock Option may be granted with an exercise price lower than that set forth in the preceding sentence if such Option is granted pursuant to an assumption or substitution for another option in a manner satisfying the provisions of
Section 424(a) of the Code. 
 (c) Exercise Price of a Nonstatutory Stock Option. The Board shall determine the exercise price of each
Nonstatutory Stock Option. A Nonstatutory Stock Option may be granted with an exercise price lower than that set forth herein if such Option is granted pursuant to an assumption or substitution for another option in a manner satisfying the
provisions of Section 424(a) of the Code. 
 (d) Consideration. The purchase price of Common Stock acquired pursuant to an Option shall
be paid, to the extent permitted by applicable statutes and regulations, either (i) in cash at the time the Option is exercised or (ii) at the discretion of the Board at the time of the grant of the Option (or subsequently in the case of a
Nonstatutory Stock Option) (1) by delivery to the Company (either by actual delivery or attestation) of other Common Stock, (2) according to a deferred payment or other similar arrangement with the Optionholder or (3) in any other
form of legal consideration that may be acceptable to the Board. 
 In the case of any deferred payment arrangement, interest shall be
compounded at least annually and shall be charged at the minimum rate of interest necessary to avoid the treatment as interest, under any applicable provisions of the Code, of any amounts other than amounts stated to be interest under the deferred
payment arrangement. 
  

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 (e) Transferability of an Incentive Stock Option. An Incentive Stock Option shall not be transferable
except by will or by the laws of descent and distribution and shall be exercisable during the lifetime of the Optionholder only by the Optionholder. Notwithstanding the foregoing, the Optionholder may, by delivering written notice to the Company, in
a form satisfactory to the Company, designate a third party who, in the event of the death of the Optionholder, shall thereafter be entitled to exercise the Option. 
 (f) Transferability of a Nonstatutory Stock Option. A Nonstatutory Stock Option shall be transferable to the extent provided in the Option Agreement. If the Nonstatutory Stock Option does not provide for
transferability, then the Nonstatutory Stock Option shall not be transferable except by will or by the laws of descent and distribution and shall be exercisable during the lifetime of the Optionholder only by the Optionholder. Notwithstanding the
foregoing, the Optionholder may, by delivering written notice to the Company, in a form satisfactory to the Company, designate a third party who, in the event of the death of the Optionholder, shall thereafter be entitled to exercise the Option.

 (g) Vesting Generally. The total number of shares of Common Stock subject to an Option may, but need not, vest and therefore become
exercisable in periodic installments that may, but need not, be equal. The Option may be subject to such other terms and conditions on the time or times when it may be exercised (which may be based on performance or other criteria) as the Board may
deem appropriate. The vesting provisions of individual Options may vary. The provisions of this subsection 6(g) are subject to any Option provisions governing the minimum number of shares of Common Stock as to which an Option may be exercised.

 (h) Termination of Continuous Service. In the event an Optionholder’s Continuous Service terminates (other than upon the
Optionholder’s death or Disability), the Optionholder may exercise his or her Option (to the extent that the Optionholder was entitled to exercise such Option as of the date of termination) but only within such period of time ending on the
earlier of (i) the date three (3) months following the termination of the Optionholder’s Continuous Service (or such longer or shorter period specified in the Option Agreement), or (ii) the expiration of the term of the Option as set forth
in the Option Agreement. If, after termination, the Optionholder does not exercise his or her Option within the time specified in the Option Agreement, the Option shall terminate. 
 (i) Extension of Termination Date. An Optionholder’s Option Agreement may also provide that if the exercise of the Option following the termination
of the Optionholder’s Continuous Service (other than upon the Optionholder’s death or Disability) would be prohibited at any time solely because the issuance of shares of Common Stock would violate the registration requirements under the

  

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Securities Act, then the Option shall terminate on the earlier of (i) the expiration of the term of the Option set forth in subsection 6(a) or
(ii) the expiration of a period of three (3) months after the termination of the Optionholder’s Continuous Service during which the exercise of the Option would not be in violation of such registration requirements. 
 (j) Disability of Optionholder. In the event that an Optionholder’s Continuous Service terminates as a result of the Optionholder’s Disability,
the Optionholder may exercise his or her Option (to the extent that the Optionholder was entitled to exercise such Option as of the date of termination), but only within such period of time ending on the earlier of (i) the date twelve (12)
months following such termination (or such longer or shorter period specified in the Option Agreement) or (ii) the expiration of the term of the Option as set forth in the Option Agreement. If, after termination, the Optionholder does not
exercise his or her Option within the time specified herein, the Option shall terminate. 
 (k) Death of Optionholder. In the event
(i) an Optionholder’s Continuous Service terminates as a result of the Optionholder’s death or (ii) the Optionholder dies within the period (if any) specified in the Option Agreement after the termination of the
Optionholder’s Continuous Service for a reason other than death, then the Option may be exercised (to the extent the Optionholder was entitled to exercise such Option as of the date of death) by the Optionholder’s estate, by a person who
acquired the right to exercise the Option by bequest or inheritance or by a person designated to exercise the option upon the Optionholder’s death pursuant to subsection 6(e) or 6(f), but only within the period ending on the earlier of
(1) the date eighteen (18) months following the date of death (or such longer or shorter period specified in the Option Agreement) or (2) the expiration of the term of such Option as set forth in the Option Agreement. If, after death, the
Option is not exercised within the time specified herein, the Option shall terminate. 
 (l) Early Exercise. The Option may, but need not,
include a provision whereby the Optionholder may elect at any time before the Optionholder’s Continuous Service terminates to exercise the Option as to any part or all of the shares of Common Stock subject to the Option prior to the full
vesting of the Option. Subject to the “Repurchase Limitation” in subsection 10(g), any unvested shares of Common Stock so purchased may be subject to a repurchase option in favor of the Company or to any other restriction the Board
determines to be appropriate. Provided that the “Repurchase Limitation” in subsection 10(g) is not violated, the Company will not exercise its repurchase option until at least six (6) months (or such longer or shorter period of time
required to avoid classification of the Option as a liability for financial accounting purposes) have elapsed following exercise of the Option unless the Board otherwise specifically provides in the Option. 
  

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 (m) Re-Load Options. 
 (i) Without in any way limiting the authority of the Board to make or not to make grants of Options hereunder, the Board shall have the authority (but not an obligation) to include as part of any Option Agreement a
provision entitling the Optionholder to a further Option (a “Re-Load Option”) in the event the Optionholder exercises the Option evidenced by the Option Agreement, in whole or in part, by surrendering other shares of Common Stock in
accordance with this Plan and the terms and conditions of the Option Agreement. Unless otherwise specifically provided in the Option, the Optionholder shall not surrender shares of Common Stock acquired, directly or indirectly from the Company,
unless such shares have been held for more than six (6) months (or such longer or shorter period of time required to avoid classification of the Option as a liability for financial accounting purposes). 
 (ii) Any such Re-Load Option shall (1) provide for a number of shares of Common Stock equal to the number of shares of Common Stock surrendered as
part or all of the exercise price of such Option; (2) have an expiration date which is the same as the expiration date of the Option the exercise of which gave rise to such Re-Load Option; and (3) have an exercise price which is equal to
one hundred percent (100%) of the Fair Market Value of the Common Stock subject to the Re-Load Option on the date of exercise of the original Option. Notwithstanding the foregoing, a Re-Load Option shall be subject to the same exercise price
and term provisions heretofore described for Options under the Plan. 
 (iii) Any such Re-Load Option may be an Incentive Stock Option or a
Nonstatutory Stock Option, as the Board may designate at the time of the grant of the original Option; provided, however, that the designation of any Re-Load Option as an Incentive Stock Option shall be subject to the one hundred thousand dollar
($100,000) annual limitation on the exercisability of Incentive Stock Options described in subsection 10(d) and in Section 422(d) of the Code. There shall be no Re-Load Options on a Re-Load Option. Any such Re-Load Option shall be subject to
the availability of sufficient shares of Common Stock under subsection 4(a) and the “Section 162(m) Limitation” on the grants of Options under subsection 5(c) and shall be subject to such other terms and conditions as the Board may
determine which are not inconsistent with the express provisions of the Plan regarding the terms of Options. 
 7. PROVISIONS OF STOCK AWARDS OTHER THAN
OPTIONS. 
 (a) Stock Bonus Awards. Each stock bonus agreement shall be in such form and shall contain such terms and conditions as the Board
shall deem appropriate. The terms and conditions of stock bonus agreements may change from time to time, and the terms and conditions of separate stock bonus agreements need not be identical, but each stock bonus agreement shall include (through
incorporation of provisions hereof by reference in the agreement or otherwise) the substance of each of the following provisions: 
 (i)
Consideration. A stock bonus may be awarded in consideration for past services actually rendered to the Company or an Affiliate for its benefit. 
  

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 (ii) Vesting. Subject to the “Repurchase Limitation” in subsection 10(g), shares of Common
Stock awarded under the stock bonus agreement may, but need not, be subject to a share repurchase option in favor of the Company in accordance with a vesting schedule to be determined by the Board. 
 (iii) Termination of Participant’s Continuous Service. Subject to the “Repurchase Limitation” in subsection 10(g), in the event a
Participant’s Continuous Service terminates, the Company may reacquire any or all of the shares of Common Stock held by the Participant which have not vested as of the date of termination under the terms of the stock bonus agreement.

 (iv) Transferability. Rights to acquire shares of Common Stock under the stock bonus agreement shall be transferable by the Participant
only upon such terms and conditions as are set forth in the stock bonus agreement, as the Board shall determine in its discretion, so long as Common Stock awarded under the stock bonus agreement remains subject to the terms of the stock bonus
agreement. 
 (b) Restricted Stock Awards. Each restricted stock purchase agreement shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The terms and conditions of the restricted stock purchase agreements may change from time to time, and the terms and conditions of separate restricted stock purchase agreements need not be identical,
but each restricted stock purchase agreement shall include (through incorporation of provisions hereof by reference in the agreement or otherwise) the substance of each of the following provisions: 
 (i) Purchase Price. Subject to the provisions of subsection 5(b) regarding Ten Percent Stockholders, the purchase price under each restricted stock
purchase agreement shall be such amount as the Board shall determine and designate in such restricted stock purchase agreement. 
 (ii)
Consideration. The purchase price of Common Stock acquired pursuant to the restricted stock purchase agreement shall be paid either: (i) in cash at the time of purchase; (ii) at the discretion of the Board, according to a deferred payment
or other similar arrangement with the Participant; or (iii) in any other form of legal consideration that may be acceptable to the Board in its discretion. 
 (iii) Vesting. Subject to the “Repurchase Limitation” in subsection 10(g), shares of Common Stock acquired under the restricted stock purchase agreement may, but need not, be subject to a share repurchase
option in favor of the Company in accordance with a vesting schedule to be determined by the Board. 
  

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 (iv) Termination of Participant’s Continuous Service. Subject to the “Repurchase
Limitation” in subsection 10(g), in the event a Participant’s Continuous Service terminates, the Company may repurchase or otherwise reacquire any or all of the shares of Common Stock held by the Participant which have not vested as of the
date of termination under the terms of the restricted stock purchase agreement. 
 (v) Transferability. Rights to acquire shares of Common
Stock under the restricted stock purchase agreement shall be transferable by the Participant only upon such terms and conditions as are set forth in the restricted stock purchase agreement, as the Board shall determine in its discretion, so long as
Common Stock awarded under the restricted stock purchase agreement remains subject to the terms of the restricted stock purchase agreement. 
 8. COVENANTS
OF THE COMPANY. 
 (a) Availability of Shares. During the terms of the Stock Awards, the Company shall keep available at all times the number
of shares of Common Stock required to satisfy such Stock Awards. 
 (b) Securities Law Compliance. The Company shall seek to obtain from each
regulatory commission or agency having jurisdiction over the Plan such authority as may be required to grant Stock Awards and to issue and sell shares of Common Stock upon exercise of the Stock Awards; provided, however, that this undertaking shall
not require the Company to register under the Securities Act the Plan, any Stock Award or any Common Stock issued or issuable pursuant to any such Stock Award. If, after reasonable efforts, the Company is unable to obtain from any such regulatory
commission or agency the authority which counsel for the Company deems necessary for the lawful issuance and sale of Common Stock under the Plan, the Company shall be relieved from any liability for failure to issue and sell Common Stock upon
exercise of such Stock Awards unless and until such authority is obtained. 
 9. USE OF PROCEEDS FROM STOCK. 
 Proceeds from the sale of Common Stock pursuant to Stock Awards shall constitute general funds of the Company. 
 10. MISCELLANEOUS. 
 (a) Acceleration of Exercisability and
Vesting. The Board shall have the power to accelerate the time at which a Stock Award may first be exercised or the time during which a Stock Award or any part thereof will vest in accordance with the Plan, notwithstanding the provisions in the
Stock Award stating the time at which it may first be exercised or the time during which it will vest. 
  

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 (b) Stockholder Rights. No Participant shall be deemed to be the holder of, or to have any of the rights
of a holder with respect to, any shares of Common Stock subject to such Stock Award unless and until such Participant has satisfied all requirements for exercise of the Stock Award pursuant to its terms. 
 (c) No Employment or other Service Rights. Nothing in the Plan or any instrument executed or Stock Award granted pursuant thereto shall confer upon any
Participant any right to continue to serve the Company or an Affiliate in the capacity in effect at the time the Stock Award was granted or shall affect the right of the Company or an Affiliate to terminate (i) the employment of an Employee
with or without notice and with or without cause, (ii) the service of a Consultant pursuant to the terms of such Consultant’s agreement with the Company or an Affiliate or (iii) the service of a Director pursuant to the Bylaws of the
Company or an Affiliate, and any applicable provisions of the corporate law of the state in which the Company or the Affiliate is incorporated, as the case may be. 
 (d) Incentive Stock Option $100,000 Limitation. To the extent that the aggregate Fair Market Value (determined at the time of grant) of Common Stock with respect to which Incentive Stock Options are exercisable for
the first time by any Optionholder during any calendar year (under all plans of the Company and its Affiliates) exceeds one hundred thousand dollars ($100,000), the Options or portions thereof which exceed such limit (according to the order in which
they were granted) shall be treated as Nonstatutory Stock Options. 
 (e) Investment Assurances. The Company may require a Participant, as a
condition of exercising or acquiring Common Stock under any Stock Award, (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 Stock Award; and (ii) to give written assurances satisfactory to the Company stating that the Participant is acquiring Common Stock subject to the Stock Award for the Participant’s own account and not with any
present intention of selling or otherwise distributing the Common Stock. The foregoing requirements, and any assurances given pursuant to such requirements, shall be inoperative if (1) the issuance of the shares of Common Stock upon the
exercise or acquisition of Common Stock under the Stock Award has been registered under a then currently effective registration statement under the Securities Act or (2) as to any particular requirement, a determination is made by counsel for
the Company that such requirement need not 

  

 15 

 
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 Common Stock. 
 (f) Withholding Obligations. To the extent provided by the terms of a Stock Award Agreement, the Participant may satisfy any federal, state or local tax
withholding obligation relating to the exercise or acquisition of Common Stock under a Stock Award by any of the following means (in addition to the Company’s right to withhold from any compensation paid to the Participant by the Company) or by
a combination of such means: (i) tendering a cash payment; (ii) authorizing the Company to withhold shares of Common Stock from the shares of Common Stock otherwise issuable to the Participant as a result of the exercise or acquisition of
Common Stock under the Stock Award, provided, however, that no shares of Common Stock are withheld with a value exceeding the minimum amount of tax required to be withheld by law; or (iii) delivering to the Company owned and unencumbered shares
of Common Stock. 
 (g) Repurchase Limitation. The terms of any repurchase option shall be specified in the Stock Award and may be either at
Fair Market Value at the time of repurchase or at not less than the original purchase price. 
 11. ADJUSTMENTS UPON CHANGES IN STOCK. 
 (a) Capitalization Adjustments. If any change is made in the Common Stock subject to the Plan, or subject to any Stock Award, without the receipt of
consideration by the Company (through merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, stock split, liquidating dividend, combination of shares, exchange of shares,
change in corporate structure or other transaction not involving the receipt of consideration by the Company), the Board shall appropriately adjust: (i) the class(es) and maximum number of securities subject to the Plan pursuant to subsection
4(a), (ii) the class(es) and maximum number of securities that may be issued pursuant to the exercise of Incentive Stock Options pursuant to subsection 4(b), (iii) the maximum number of securities that may be awarded to any person pursuant
to subsection 5(c), and (iv) the class(es) and number of securities and price per share of stock subject to outstanding Stock Awards. The Board shall make such adjustments, and its determination shall be final, binding and conclusive. (The
conversion of any convertible securities of the Company shall not be treated as a transaction “without the receipt of consideration” by the Company.) 
 (b) Change in Control—Dissolution or Liquidation. In the event of a dissolution or liquidation of the Company, then all outstanding Stock Awards shall terminate immediately prior to such event. 
  

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 (c) Change in Control—Asset Sale, Merger, Consolidation or Reverse Merger. In the event of
(i) a sale, lease or other disposition of all or substantially all of the assets of the Company, (ii) a merger or consolidation in which the Company is not the surviving corporation or (iii) a reverse merger in which the Company is
the surviving corporation but the shares of 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, then any surviving corporation or
acquiring corporation shall assume any Stock Awards outstanding under the Plan or shall substitute similar stock awards (including an award to acquire the same consideration paid to the stockholders in the transaction described in this subsection
11(c) for those outstanding under the Plan). In the event any surviving corporation or acquiring corporation refuses to assume such Stock Awards or to substitute similar stock awards for those outstanding under the Plan, then with respect to Stock
Awards held by Participants whose Continuous Service has not terminated, the vesting of such Stock Awards and any shares of Common Stock acquired under such Stock Awards (and, if applicable, the time during which such Stock Awards may be exercised)
shall be accelerated in full, and the Stock Awards shall terminate if not exercised (if applicable) at or prior to such event. With respect to any other Stock Awards outstanding under the Plan, such Stock Awards shall terminate if not exercised (if
applicable) prior to such event. 
 (d) Change in Control—Securities Acquisition. In the event of an acquisition by any person, entity
or group within the meaning of Section 13(d) or 14(d) of the Exchange Act, or any comparable successor provisions (excluding any employee benefit plan, or related trust, sponsored or maintained by the Company or an Affiliate) of the beneficial
ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act, or comparable successor rule) of securities of the Company representing at least fifty percent (50%) of the combined voting power entitled to vote in the election
of Directors and provided that such acquisition is not a result of, and does not constitute a transaction described in, subsection 11(c) hereof, then with respect to Stock Awards held by Participants whose Continuous Service has not terminated, the
vesting of such Stock Awards and any shares of Common Stock acquired under such Stock Awards (and, if applicable, the time during which such Stock Awards may be exercised) shall be accelerated in full. 
 (e) Change in Control—Termination of Continuous Service. 
 (i) In the event of a change in control as specified in subsection 11(c) or 11(d) (collectively, a “Change in Control”) and the Continuous Service of a Participant is either involuntarily terminated without
Cause or is voluntarily terminated for Good Reason within one (1) month before or thirteen (13) months after the Change in Control, then the vesting of such Participant’s Stock Award and any shares of Common Stock acquired under such Stock
Award (and, if applicable, the time during which such Stock Award may be exercised) shall be accelerated by one (1) year. 
  

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 (ii) The Company or an Affiliate may not terminate the Continuous Service of a Participant for Cause
unless and until there shall have been delivered to such person a copy of a resolution duly adopted by the affirmative vote of at least a majority of the Board at a meeting of the Board called and held for the purpose (after reasonable notice to
such person and an opportunity for such person, together with such person’s counsel, to be heard before the Board), finding that in the good faith opinion of the Board, such person was guilty of the conduct constituting “Cause” and
specifying the particulars thereof in detail. 
 (iii) Any purported voluntary termination of the Continuous Service of a Participant for
Good Reason shall be communicated by a notice of termination to the Company and shall state the specific termination provisions relied upon and set forth in reasonable detail the facts and circumstances claimed to provide a basis for such
termination. 
 (iv) If any benefit received or to be received by such person pursuant to the acceleration of the vesting and/or
exercisability of an Award would constitute an “excess parachute payment” subject to excise tax under Section 4999 of the Code (the “Excise Tax”), the amount or benefit to be received by such person shall be reduced if such
reduction, taking into account all applicable federal, state and local income and employment taxes and the Excise Tax, results in a greater after-tax benefit for such person. The determination by the Company’s independent auditors of any
required reduction pursuant hereto shall be conclusive and binding upon such person. 
 12. AMENDMENT OF THE PLAN AND STOCK AWARDS. 
 (a) Amendment of Plan. The Board at any time, and from time to time, may amend the Plan. However, except as provided in Section 11 relating to
adjustments upon changes in Common Stock, no amendment shall be effective unless approved by the stockholders of the Company to the extent stockholder approval is necessary to satisfy the requirements of Section 422 of the Code, Rule 16b-3 or
any Nasdaq or securities exchange listing requirements. 
 (b) Stockholder Approval. The Board may, in its sole discretion, submit any other
amendment to the Plan for stockholder approval, including, but not limited to, amendments to the Plan intended to satisfy the requirements of Section 162(m) of the Code and the regulations thereunder regarding the exclusion of performance-based
compensation from the limit on corporate deductibility of compensation paid to certain executive officers. 
 (c) Contemplated Amendments. It
is expressly contemplated that the Board may amend the Plan in any respect the Board deems necessary or advisable to 

  

 18 

 
provide eligible Employees with the maximum benefits provided or to be provided under the provisions of the Code and the regulations promulgated thereunder
relating to Incentive Stock Options and/or to bring the Plan and/or Incentive Stock Options granted under it into compliance therewith. 
 (d) No Impairment of Rights. Rights under any Stock Award granted before amendment of the Plan shall not be impaired by any amendment of the Plan unless (i) the Company requests the consent of the Participant and (ii) the Participant
consents in writing. 
 (e) Amendment of Stock Awards. The Board at any time, and from time to time, may amend the terms of any one or more
Stock Awards; provided, however, that the rights under any Stock Award shall not be impaired by any such amendment unless (i) the Company requests the consent of the Participant and (ii) the Participant consents in writing. 
 13. TERMINATION OR SUSPENSION OF THE PLAN. 
 (a) Plan Term.
The Board may suspend or terminate the Plan at any time. Unless sooner terminated, the Plan shall terminate on the day before the tenth (10th) anniversary of the date the Plan is adopted by the Board or approved by the stockholders of the Company,
whichever is earlier. No Stock Awards may be granted under the Plan while the Plan is suspended or after it is terminated. 
 (b) No
Impairment of Rights. Suspension or termination of the Plan shall not impair rights and obligations under any Stock Award granted while the Plan is in effect except with the written consent of the Participant. 
 14. EFFECTIVE DATE OF PLAN. 
 The Plan shall become effective
upon adoption by the Board, but no Stock Award shall be exercised (or, in the case of a stock bonus, shall be granted) unless and until the Plan has been approved by the stockholders of the Company, which approval shall be within twelve
(12) months before or after the date the Plan is adopted by the Board. 
 15. CHOICE OF LAW. 
 The law of the State of Delaware shall govern all questions concerning the construction, validity and interpretation of this Plan, without regard to such
state’s conflict of laws rules. 
  

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