2008 Employee Stock Purchase Plan



 Exhibit 10.4 
 CHEMOCENTRYX, INC. 
 2008 EMPLOYEE STOCK PURCHASE PLAN 
 ARTICLE I 
 PURPOSE 

The purposes of this ChemoCentryx, Inc. 2008 Employee Stock Purchase Plan (the “Plan”) are to assist Eligible Employees of
ChemoCentryx, Inc., a Delaware corporation (the “Company”), and its Subsidiaries in acquiring a stock ownership interest in the Company pursuant to a plan which is intended to qualify as an “employee stock purchase
plan” within the meaning of Section 423(b) of the Code, and to help Eligible Employees provide for their future security and to encourage them to remain in the employment of the Company and its Subsidiaries. 
 All share numbers set forth in this Plan give effect to the reverse stock split implemented by the Company in connection with its initial public
offering. 
 ARTICLE II 
 DEFINITIONS AND CONSTRUCTION 
 Wherever the following terms are used in the Plan they shall have the meanings specified
below, unless the context clearly indicates otherwise. The singular pronoun shall include the plural where the context so indicates. 
 2.1
“Administrator” means the entity that conducts the general administration of the Plan as provided herein. The term “Administrator” shall refer to the Committee unless the Board has assumed the
authority for administration of the Plan generally as provided in Article 3. 
 2.2 “Board” shall mean the Board of
Directors of the Company. 
 2.3 “Change in Control” means and includes each of the following: 
 (a) A transaction or series of transactions (other than an offering of Stock to the general public through a registration statement filed with the
Securities and Exchange Commission) whereby any “person” or related “group” of “persons” (as such terms are used in Sections 13(d) and 14(d)(2) of the Exchange Act) (other than the Company, any of its subsidiaries, an
employee benefit plan maintained by the Company or any of its subsidiaries or a “person” that, prior to such transaction, directly or indirectly controls, is controlled by, or is under common control with, the Company) directly or
indirectly acquires beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act) of securities of the Company possessing more than 50% of the total combined voting power of the Company’s securities outstanding immediately
after such acquisition; or 
 (b) During any period of two consecutive years, individuals who, at the beginning of such period, constitute
the Board together with any new director(s) (other than a director designated by a person who shall have entered into an agreement with the Company to effect a transaction described in Section 2.3(a) or Section 2.3(c)) whose election by
the Board or nomination for election by the Company’s stockholders was approved by a vote of at least two-thirds of the directors then still in office who either were directors at the beginning of the two year period or whose election or
nomination for election was previously so approved, cease for any reason to constitute a majority thereof; or 









 (c) The consummation by the Company (whether directly involving the Company or indirectly involving the
Company through one or more intermediaries) of (x) a merger, consolidation, reorganization, or business combination or (y) a sale or other disposition of all or substantially all of the Company’s assets in any single transaction or
series of related transactions or (z) the acquisition of assets or stock of another entity, in each case other than a transaction: 
 (i) Which results in the Company’s voting securities outstanding immediately before the transaction continuing to represent (either by remaining outstanding or by being converted into voting securities of the Company or the person
that, as a result of the transaction, controls, directly or indirectly, the Company or owns, directly or indirectly, all or substantially all of the Company’s assets or otherwise succeeds to the business of the Company (the Company or such
person, the “Successor Entity”)) directly or indirectly, at least a majority of the combined voting power of the Successor Entity’s outstanding voting securities immediately after the transaction, and 
 (ii) After which no person or group beneficially owns voting securities representing 50% or more of the combined voting power of the Successor Entity;
provided, however, that no person or group shall be treated for purposes of this Section 2.4(c)(ii) as beneficially owning 50% or more of combined voting power of the Successor Entity solely as a result of the voting power held in the
Company prior to the consummation of the transaction. 
 The Administrator shall have full and final authority, which shall be exercised in
its discretion, to determine conclusively whether a Change in Control of the Company has occurred pursuant to the above definition, and the date of the occurrence of such Change in Control and any incidental matters relating thereto. 
 2.4 “Code” shall mean the Internal Revenue Code of 1986, as amended from time to time, and the regulations issued thereunder.

 2.5 “Committee” means the committee of the Board described in Article 3. 
 2.6 “Company” shall mean ChemoCentryx, Inc., a Delaware corporation. 
 2.7 “Compensation” of an Eligible Employee shall mean the gross base compensation received by such Eligible Employee as
compensation for services to the Company or any Designated Subsidiary, excluding overtime payments, sales commissions, incentive compensation, bonuses, expense reimbursements, fringe benefits and other special payments. 
 2.8 “Designated Subsidiary” shall mean any Subsidiary designated by the Administrator in accordance with Section 3.3(ii).

 2.9 “Eligible Employee” shall mean an Employee of the Company or a Designated Subsidiary: (i) who does not,
immediately after any rights under this Plan are granted, own (directly or through attribution) stock possessing 5% or more of the total combined voting power or value of all classes of Stock or other stock of the Company, a Parent or a Subsidiary
(as determined under Section 423(b)(3) of the Code); (ii) whose customary employment is for more than twenty hours per week; (iii) whose customary employment is for more than five months in any calendar year; and (iv) who has
been continuously employed by the Company or a Designated Subsidiary for at least three months; provided, however, that the Administrator may provide in an Offering Document that (x) Employees who are highly compensated employees
within the meaning of Section 423(b)(4)(D) of the Code, and/or (y) Employees who have not met a service requirement designated by the Administrator pursuant to Section 423(b)(4)(A) of the Code (which service requirement may not exceed
two years), shall not be eligible to 

  

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participate in an Offering Period. For purposes of clause (i) above, the rules of Section 424(d) of the Code with regard to the attribution of
stock ownership shall apply in determining the stock ownership of an individual, and stock which an Employee may purchase under outstanding options shall be treated as stock owned by the Employee. For purposes of the Plan, the employment
relationship shall be treated as continuing intact while the individual is on sick leave or other leave of absence approved by the Company or a Designated Subsidiary and meeting the requirements of Treasury Regulation Section 1.421-7(h)(2).

 2.10 “Employee” means any officer or other employee (as defined in accordance with Section 3401(c) of the
Code) of the Company or any Designated Subsidiary. 
 2.11 “Enrollment Date” shall mean the first day of each
Offering Period. 
 2.12 “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended from time to time.

 2.13 “Fair Market Value” means, as of any given date, the fair market value of a share of Stock on the date
determined by such methods or procedures as may be established from time to time by the Administrator. Unless otherwise determined by the Administrator, the Fair Market Value of a share of Stock as of any given date shall be (a) if Stock is
traded on any established stock exchange, the closing price of a share of Stock as reported in the Wall Street Journal (or such other source as the Administrator may deem reliable for such purposes) for such date, or if no sale occurred on
such date, the first trading day immediately prior to such date during which a sale occurred; or (b) if Stock is not traded on an exchange but is quoted on a national market or other quotation system, the last sales price on such date, or if no
sales occurred on such date, then on the date immediately prior to such date on which sales price are reported. 
 2.14 “Offering
Document” shall have the meaning given to such term in Section 5.1. 
 2.15 “Offering Period” shall
mean each Offering Period designated by the Administrator in the applicable Offering Document pursuant to Section 5.1. 
 2.16
“Parent” means any corporation, other than the Company, in an unbroken chain of corporations ending with the Company if, at the time of the determination, each of the corporations other than the Company owns stock possessing
50% or more of the total combined voting power of all classes of stock in one of the other corporations in such chain. 
 2.17
“Participant” means any Eligible Employee who has executed a participation agreement and been granted rights to purchase Stock pursuant to the Plan. 
 2.18 “Plan” shall mean this ChemoCentryx, Inc. 2008 Employee Stock Purchase Plan, as it may be amended from time to time.

 2.19 “Purchase Date” shall mean the last Trading Day of each Offering Period. 
  

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 2.20 “Purchase Price” shall mean the purchase price designated by the
Administrator in the applicable Offering Document (which purchase price shall not be less than 85% of the Fair Market Value of a share of Stock on the Enrollment Date or on the Purchase Date, whichever is lower); provided, however,
that, in the event no purchase price is designated by the Administrator in the applicable Offering Document, the purchase price for the Offering Periods covered by such Offering Document shall be 85% of the Fair Market Value of a share of Stock on
the Enrollment Date or on the Purchase Date, whichever is lower); provided, further, that the Purchase Price may be adjusted by the Administrator pursuant to Article 9; provided, further, that the Purchase Price shall not
be less than the par value of a share of Stock. 
 2.21 “Securities Act” shall mean the Securities Act of 1933, as
amended from time to time. 
 2.22 “Stock” means the common stock of the Company and such other securities of the
Company that may be substituted for Stock pursuant to Article 9. 
 2.23 “Subsidiary” shall mean any corporation,
other than the Company, in an unbroken chain of corporations beginning with the Company if, at the time of the determination, each of the corporations other than the last corporation in an unbroken chain owns stock possessing 50% or more of the
total combined voting power of all classes of stock in one of the other corporations in such chain. 
 2.24 “Trading
Day” shall mean any day on which the Stock is actually traded. 
 ARTICLE III 
 ADMINISTRATION 
 3.1
Administrator. The Administrator of the Plan shall be the Compensation Committee of the Board (or another committee or a subcommittee of the Board to which the Board delegates administration of the Plan) (such committee, the
“Committee”), which Committee shall consist solely of two or more members of the Board each of whom is a “non-employee director” within the meaning of Rule 16b-3 which has been adopted by the Securities and Exchange
Commission under the Exchange Act and which Committee is otherwise constituted to comply with applicable law. Appointment of Committee members shall be effective upon acceptance of appointment. The Board may abolish the Committee at any time and
revest in the Board the administration of the Plan. Committee members may resign at any time by delivering written notice to the Board. Vacancies in the Committee may only be filled by the Board. 
 3.2 Action by the Administrator. A majority of the Administrator shall constitute a quorum. The acts of a majority of the members present at any
meeting at which a quorum is present, and, subject to applicable law and the Bylaws of the Company, acts approved in writing by a majority of the Administrator in lieu of a meeting, shall be deemed the acts of the Administrator. Each member of the
Administrator is entitled to, in good faith, rely or act upon any report or other information furnished to that member by any officer or other employee of the Company or any Designated Subsidiary, the Company’s independent certified public
accountants, or any executive compensation consultant or other professional retained by the Company to assist in the administration of the Plan. 
 3.3 Authority of Administrator. The Administrator shall have the power, subject to, and within the limitations of, the express provisions of the Plan: 
  

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 (i) To determine when and how rights to purchase stock of the Company shall be granted and the
provisions of each offering of such rights (which need not be identical). 
 (ii) To designate from time to time which Subsidiaries of the
Company shall be Designated Subsidiaries, which designation may be made without the approval of the stockholders of the Company. 
 (iii) To
construe and interpret the Plan and rights granted under it, and to establish, amend and revoke rules and regulations for its administration. The Administrator, in the exercise of this power, may correct any defect, omission or inconsistency in the
Plan, in a manner and to the extent it shall deem necessary or expedient to make the Plan fully effective. 
 (iv) To amend the Plan as
provided in Article 10. 
 (v) Generally, to exercise such powers and to perform such acts as the Administrator deems necessary or expedient
to promote the best interests of the Company and its Subsidiaries and to carry out the intent that the Plan be treated as an “employee stock purchase plan” within the meaning of Section 423 of the Code. 
 3.4 Decisions Binding. The Administrator’s interpretation of the Plan, any rights granted pursuant to the Plan, any participation agreement
and all decisions and determinations by the Administrator with respect to the Plan are final, binding, and conclusive on all parties. 
 ARTICLE IV 
 SHARES SUBJECT TO THE PLAN 
 4.1 Number of Shares. Subject to Article 9, the aggregate number of shares of Stock which may be issued pursuant to rights granted under the Plan shall be 350,000 shares. In addition to the foregoing, subject
to Article 9, commencing on January 1, 2009, and on each January 1 thereafter during the term of the Plan, the number of shares of Stock which shall be made available for sale under the Plan shall be increased by that number of shares of
Stock equal to the least of (a) 1% of the Company’s outstanding shares on such date, (b) 250,000 shares, or (c) a lesser amount determined by the Board. Accordingly, the number of shares of Stock which shall be available for sale
under the Plan shall be subject to increase under the preceding sentence only on January 1, 2009 and on each subsequent January 1 through and including January 1, 2017. If any right granted under the Plan shall for any reason
terminate without having been exercised, the Stock not purchased under such right shall again become available for the Plan. Notwithstanding anything in this Section 4.1 to the contrary, the number of shares of Stock that may be issued or
transferred pursuant to rights granted under the Plan shall not exceed an aggregate of 2,600,000 shares, subject to Article 9. 
 4.2
Stock Distributed. Any Stock distributed pursuant to the Plan may consist, in whole or in part, of authorized and unissued Stock, treasury stock or Stock purchased on the open market. 
  

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 ARTICLE V 
 OFFERING PERIODS; OFFERING DOCUMENTS; PURCHASE DATES 
 5.1 Offering Periods. The Administrator
may from time to time grant or provide for the grant of rights to purchase Stock of the Company under the Plan to Eligible Employees during one or more periods (each, an “Offering Period”) selected by the Administrator
commencing on such dates (each, an “Enrollment Date”) selected by the Administrator. The terms and conditions applicable to each Offering Period shall be set forth in an “Offering Document” adopted by
the Administrator, which Offering Document shall be in such form and shall contain such terms and conditions as the Administrator shall deem appropriate and shall be incorporated by reference into and made part of the Plan and shall be attached
hereto as part of the Plan. The Administrator shall establish in each Offering Document one or more dates during an Offering Period (the “Purchase Date(s)”) on which rights granted under the Plan shall be exercised and
purchases of Stock carried out during such Offering Period in accordance with such Offering Document and the Plan. The provisions of separate Offering Periods under the Plan need not be identical. 
 5.2 Offering Documents. Each Offering Document with respect to an Offering Period shall specify (through incorporation of the provisions of this
Plan by reference or otherwise): 
 (i) the length of the Offering Period, which period shall not exceed twenty-seven months; 
 (ii) the Enrollment Date for such Offering Period; 
 (iii) the Purchase Date(s) during such Offering Period; 
 (iv) the maximum number of shares that may be
purchased by any Eligible Employee during such Offering Period; 
 (v) in connection with each Offering Period that contains more than one
Purchase Date, the maximum aggregate number of shares which may be purchased by any Eligible Employee on any given Purchase Date during the Offering Period; and 
 (vi) such other provisions as the Administrator determines are appropriate, subject to the Plan. 
 ARTICLE
VI 
 PARTICIPATION 
 6.1 Eligibility. Any Eligible Employee who shall be employed by the Company or a Designated Subsidiary on the day immediately preceding a given Enrollment Date for an Offering Period shall be eligible to participate in the Plan
during such Offering Period, subject to the requirements of this Article 6 and the limitations imposed by Section 423(b) of the Code. 
 6.2 Enrollment in Plan. Except as otherwise set forth in an Offering Document, an Eligible Employee may become a Participant in the Plan for an Offering Period by delivering a participation agreement to the Company prior to the
Enrollment Date for such Offering Period (or such other date specified in the Offering Document), in such form as the Administrator provides. Each such agreement shall designate a whole percentage of such Eligible Employee’s Compensation to be
withheld by the 

  

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Company or the Designated Subsidiary employing such Eligible Employee on each payday during the Offering Period as payroll deductions under the Plan. An
Eligible Employee may designate any whole percentage of Compensation which is not less than 1% and not more than the maximum percentage specified by the Administrator in the applicable Offering Document (which percentage shall be 20% in the absence
of any such designation) as payroll deductions. The payroll deductions made for each Participant shall be credited to an account for such Participant under the Plan and shall be deposited with the general funds of the Company. A Participant may
change the percentage of Compensation designated in his or her participation agreement, subject to the limits of this Section 6.2, or may suspend his or her payroll deductions, or may resume payroll deductions pursuant to a new participation
agreement, at any time during an Offering Period; provided, however, that the Administrator may limit the number of changes a Participant may make to his or her payroll deduction elections during each Offering Period in the applicable
Offering Document. Any such change, suspension or resumption of payroll deductions shall be effective with the first full payroll period following five business days after the Company’s receipt of the new participation agreement (or such
shorter or longer period as may be specified by the Administrator in the applicable Offering Document). In the event a Participant suspends his or her payroll deductions, such Participant’s cumulative payroll deductions prior to the suspension
shall remain in his or her account and shall not be paid to such Participant unless he or she withdraws from participation in the Plan pursuant to Article 8. Except as otherwise set forth in an Offering Document, a Participant may participate in the
Plan only by means of payroll deduction and may not make contributions by lump sum payment for any Offering Period. 
 6.3 Payroll
Deductions. Except as otherwise provided in the applicable Offering Document, payroll deductions for a Participant shall commence on the first payroll following the Enrollment Date and shall end on the last payroll in the Offering Period to
which such authorization is applicable, unless sooner terminated by the Participant as provided in Article 9. 
 6.4 Effect of
Enrollment. A Participant’s completion of a participation agreement will enroll such Participant in the Plan for each subsequent Offering Period on the terms contained therein until the Participant either submits a new participation
agreement, withdraws from participation under the Plan as provided in Article 8 or otherwise becomes ineligible to participate in the Plan. 
 6.5 Limitation on Purchase of Stock. An Eligible Employee may be granted rights under the Plan only if such rights, together with any other rights granted to such Eligible Employee under “employee stock purchase plans” of
the Company, any Parent or any Subsidiary, as specified by Section 423(b)(8) of the Code, do not permit such employee’s rights to purchase stock of the Company or any Parent or Subsidiary to accrue at a rate which exceeds $25,000 of fair
market value of such stock (determined as of the first day of the Offering Period during which such rights are granted) for each calendar year in which such rights are outstanding at any time. This limitation shall be applied in accordance with
Section 423(b)(8) of the Code. 
 6.6 Decrease of Payroll Deductions. Notwithstanding the foregoing, to the extent necessary to
comply with Section 423(b)(8) of the Code and Section 6.5, a Participant’s payroll deductions may be suspended by the Administrator at any time during an Offering Period. 
 ARTICLE VII 
 GRANT AND EXERCISE OF RIGHTS 
 7.1 Grant of Rights. On the Enrollment Date of each Offering Period, each Eligible Employee participating in such Offering Period shall be granted
a right to purchase the maximum number 

  

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of shares of Stock specified under Section 5.2(iv) and shall have the right to buy, on each Purchase Date during such Offering Period (at the applicable
Purchase Price), such number of shares of the Company’s Stock as is determined by dividing (a) such Participant’s payroll deductions accumulated prior to such Purchase Date and retained in the Participant’s account as of the
Purchase Date, by (b) the applicable Purchase Price. The right shall expire on the last day of the Offering Period. 
 7.2 Exercise
of Rights. On each Purchase Date, each Participant’s accumulated payroll deductions and any other additional payments specifically provided for in the applicable Offering Document will be applied to the purchase of whole shares of Stock of
the Company, up to the maximum number of shares permitted pursuant to the terms of the Plan and the applicable Offering Document, at the Purchase Price. No fractional shares shall be issued upon the exercise of rights granted under the Plan, unless
the Offering Document specifically provides otherwise. The amount, if any, of accumulated payroll deductions remaining in each Participant’s account after the purchase of shares on each Purchase Date shall be distributed in full to the
Participant after such Purchase Date. 
 7.3 Pro Rata Allocation of Shares. If the Administrator determines that, on a given Purchase
Date, the number of shares of Stock with respect to which rights are to be exercised may exceed (i) the number of shares of Stock that were available for issuance under the Plan on the Enrollment Date of the applicable Offering Period, or
(ii) the number of shares of Stock available for issuance under the Plan on such Purchase Date, the Administrator may in its sole discretion provide that the Company shall make a pro rata allocation of the shares of Stock available for purchase
on such Enrollment Date or Purchase Date, as applicable, in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all Participants for whom rights to purchase Stock are to be exercised
pursuant to this Article 7 on such Purchase Date, and shall either (x) continue all Offering Periods then in effect, or (y) terminate any or all Offering Periods then in effect pursuant to Article 10. The Company may make pro rata
allocation of the shares available on the Enrollment Date of any applicable Offering Period pursuant to the preceding sentence, notwithstanding any authorization of additional shares for issuance under the Plan by the Company’s stockholders
subsequent to such Enrollment Date. The balance of the amount credited to the account of each Participant which has not been applied to the purchase of shares of stock shall be paid to such Participant in one lump sum in cash as soon as reasonably
practicable after the Purchase Date. 
 7.4 Withholding. At the time a Participant’s rights under the Plan are exercised, in
whole or in part, or at the time some or all of the Stock issued under the Plan is disposed of, the Participant must make adequate provision for the Company’s federal, state, or other tax withholding obligations, if any, which arise upon the
exercise of the right or the disposition of the Stock. At any time, the Company may, but shall not be obligated to, withhold from the Participant’s compensation the amount necessary for the Company to meet applicable withholding obligations,
including any withholding required to make available to the Company any tax deductions or benefits attributable to sale or early disposition of Stock by the Participant. 
 7.5 Conditions to Issuance of Stock. The Company shall not be required to issue or deliver any certificate or certificates for shares of Stock purchased upon the exercise of rights under the Plan prior to
fulfillment of all of the following conditions: 
 (a) The admission of such shares to listing on all stock exchanges, if any, on which the
Stock is then listed; and 
 (b) The completion of any registration or other qualification of such shares under any state or federal law or
under the rulings or regulations of the Securities and Exchange Commission or any other governmental regulatory body, which the Administrator shall, in its absolute discretion, deem necessary or advisable; and 
  

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 (c) The obtaining of any approval or other clearance from any state or federal governmental agency which
the Administrator shall, in its absolute discretion, determine to be necessary or advisable; and 
 (d) The payment to the Company of all
amounts which it is required to withhold under federal, state or local law upon exercise of the rights, if any; and 
 (e) The lapse of such
reasonable period of time following the exercise of the rights as the Administrator may from time to time establish for reasons of administrative convenience. 
 ARTICLE VIII 
 WITHDRAWAL; TERMINATION OF EMPLOYMENT OR ELIGIBILITY 
 8.1 Withdrawal. A Participant may withdraw all but not less than all of the payroll deductions credited to his or her account and not yet used to
exercise his or her rights under the Plan at any time by giving written notice to the Company in a form acceptable to the Administrator. All of the Participant’s payroll deductions credited to his or her account during the Offering Period shall
be paid to such Participant as soon as reasonably practicable after receipt of notice of withdrawal and such Participant’s rights for the Offering Period shall be automatically terminated, and no further payroll deductions for the purchase of
shares shall be made for such Offering Period. If a Participant withdraws from an Offering Period, payroll deductions shall not resume at the beginning of the next Offering Period unless the Participant delivers to the Company a new participation
agreement. 
 8.2 Future Participation. A Participant’s withdrawal from an Offering Period shall not have any effect upon his or
her eligibility to participate in any similar plan which may hereafter be adopted by the Company or a Designated Subsidiary or in subsequent Offering Periods which commence after the termination of the Offering Period from which the Participant
withdraws. 
 8.3 Cessation of Eligibility. Upon a Participant’s ceasing to be an Eligible Employee, for any reason, he or she
shall be deemed to have elected to withdraw from the Plan pursuant to this Article 8 and the payroll deductions credited to such Participant’s account during the Offering Period shall be paid to such Participant or, in the case of his or her
death, to the person or persons entitled thereto under 13.4, as soon as reasonably practicable and such Participant’s rights for the Offering Period shall be automatically terminated. 
  

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 ARTICLE IX 
 ADJUSTMENTS UPON CHANGES IN STOCK 
 9.1 Changes in Capitalization. Subject to
Section 9.3, in the event of any stock dividend, stock split, combination or exchange of shares, merger, consolidation, spin-off, recapitalization, distribution of Company assets to stockholders (other than normal cash dividends), or any other
corporate event affecting the Stock or the share price of the Stock, the Administrator may make such proportionate adjustments, if any, as the Administrator in its discretion may deem appropriate to reflect such change with respect to (i) the
aggregate number and type of shares of Stock (or other securities or property) that may be issued under the Plan (including, but not limited to, adjustments of the limitations in Section 3.1 and the limitations established in each Offering
Document pursuant to Section 5.2 on the maximum number of shares of Stock that may be purchased); (ii) the class(es) and number of shares and price per share of Stock subject to outstanding rights; and (iii) the Purchase Price with
respect to any outstanding rights. 
 9.2 Other Adjustments. Subject to Section 9.3, in the event of any transaction or event
described in Section 9.1 or any unusual or nonrecurring transactions or events affecting the Company, any affiliate of the Company, or the financial statements of the Company or any affiliate (including without limitation any Change in
Control), or of changes in applicable laws, regulations or accounting principles, and whenever the Administrator determines that such action is appropriate in order to prevent the dilution or enlargement of the benefits or potential benefits
intended to be made available under the Plan or with respect to any right under the Plan, to facilitate such transactions or events or to give effect to such changes in laws, regulations or principles, the Administrator, in its sole discretion and
on such terms and conditions as it deems appropriate, is hereby authorized to take any one or more of the following actions: 
 (a) To provide
for either (i) termination of any outstanding right in exchange for an amount of cash, if any, equal to the amount that would have been obtained upon the exercise of such right had such right been currently exercisable or (ii) the
replacement of such outstanding right with other rights or property selected by the Administrator in its sole discretion; 
 (b) To provide
that the outstanding rights under the Plan be assumed by the successor or survivor corporation, or a parent or subsidiary thereof, or shall be substituted for by similar rights covering the stock of the successor or survivor corporation, or a parent
or subsidiary thereof, with appropriate adjustments as to the number and kind of shares and prices; and 
 (d) To make adjustments in the
number and type of shares of Stock (or other securities or property) subject to outstanding rights under the Plan and/or in the terms and conditions of outstanding rights and rights which may be granted in the future; 
 (d) To provide that Participants’ accumulated payroll deductions may be used to purchase Stock prior to the next occurring Purchase Date on such
date as the Administrator determines in its sole discretion and the Participants’ rights under the ongoing Offering Period(s) terminated; and 
 (e) To provide that all outstanding rights shall terminate without being exercised. 
 9.3 No Adjustment Under Certain
Circumstances. No adjustment or action described in this Article 9 or in any other provision of the Plan shall be authorized to the extent that such adjustment or action would cause the Plan to fail to satisfy the requirements of
Section 423 of the Code. 
  

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 9.4 No Other Rights. Except as expressly provided in the Plan, no Participant shall have any
rights by reason of any subdivision or consolidation of shares of stock of any class, the payment of any dividend, any increase or decrease in the number of shares of stock of any class or any dissolution, liquidation, merger, or consolidation of
the Company or any other corporation. Except as expressly provided in the Plan or pursuant to action of the Administrator under the Plan, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of
any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number of shares of Stock subject to an Award or the grant or exercise price of any Award. 
 ARTICLE X 
 AMENDMENT, MODIFICATION AND TERMINATION 
 10.1 Amendment, Modification and Termination. The Administrator may amend, suspend or terminate the Plan at any time and from time to time;
provided, however, that approval by a vote of the holders of the outstanding shares of the Company’s capital stock entitled to vote shall be required to amend the Plan to: (a) change the aggregate number of shares that may be sold
pursuant to rights under the Plan under Section 4.1 (other than any adjustment as provided by Article 9); (b) change the corporations or classes of corporations whose employees may be granted rights under the Plan; or (c) change the
Plan in any manner that would cause the Plan to no longer be an “employee stock purchase plan” within the meaning of Section 423(b) of the Code. 
 10.2 Rights Previously Granted. Except as provided in Article 9 or this Article 10, no termination, amendment or modification may make any change in any right theretofore granted which adversely affects the
rights of any Participant without the consent of such Participant, provided that an Offering Period may be terminated, amended or modified by the Administrator if the Administrator determines that the termination of the Offering Period or the
Plan is in the best interests of the Company and its stockholders. 
 10.3 Certain Changes to Plan. Without stockholder consent and
without regard to whether any Participant rights may be considered to have been adversely affected, to the extent permitted by Section 423 of the Code, the Administrator shall be entitled to change the Offering Periods, limit the frequency
and/or number of changes in the amount withheld during an Offering Period, establish the exchange ratio applicable to amounts withheld in a currency other than U.S. dollars, permit payroll withholding in excess of the amount designated by a
Participant in order to adjust for delays or mistakes in the Company’s processing of properly completed withholding elections, establish reasonable waiting and adjustment periods and/or accounting and crediting procedures to ensure that amounts
applied toward the purchase of Stock for each Participant properly correspond with amounts withheld from the Participant’s Compensation, and establish such other limitations or procedures as the Administrator determines in its sole discretion
advisable which are consistent with the Plan. 
 ARTICLE XI 
 TERM OF PLAN 
 The Plan shall be effective on the date prior to the date on
which the Registration Statement filed with respect to the Plan becomes effective (the “Effective Date”). The effectiveness of the Plan shall be subject to approval of the Plan by the stockholders of the Company within twelve
months following the date this Plan is approved by the Board. No right may be granted under the Plan prior to such stockholder approval. The Plan shall be in effect until the tenth anniversary of the date this Plan is approved by the Board, unless
sooner terminated under Article 10. No rights may be granted under the Plan during any period of suspension of the Plan or after termination of the Plan. 
  

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 ARTICLE XII 
 MISCELLANEOUS 
 12.1 Restriction upon Assignment. A right granted under the Plan shall
not be transferable other than by will or the laws of descent and distribution, and is exercisable during the Participant’s lifetime only by the Participant. Except as provided in Section 12.4 hereof, a right under the Plan may not be
exercised to any extent except by the Participant. The Company shall not recognize and shall be under no duty to recognize any assignment or alienation of the Participant’s interest in the Plan, the Participant’s rights under the Plan or
any rights thereunder. 
 12.2 Rights as a Stockholder. With respect to shares of Stock subject to a right granted under the
Plan, a Participant shall not be deemed to be a stockholder of the Company, and the Participant shall not have any of the rights or privileges of a stockholder, until such shares have been issued to the Participant or his or her nominee following
exercise of the Participant’s rights under the Plan. No adjustments shall be made for dividends (ordinary or extraordinary, whether in cash securities, or other property) or distribution or other rights for which the record date occurs prior to
the date of such issuance, except as otherwise expressly provided herein. 
 12.3 Interest. No interest shall accrue on the
payroll deductions or lump sum contributions of a Participant under the Plan. 
 12.4 Designation of Beneficiary. 
 (a) A Participant may, in the manner determined by the Administrator, file a written designation of a beneficiary who is to receive any shares and cash,
if any, from the Participant’s account under the Plan in the event of such Participant’s death subsequent to a Purchase Date on which the Participant’s rights are exercised but prior to delivery to such Participant of such shares and
cash. In addition, a Participant may file a written designation of a beneficiary who is to receive any cash from the Participant’s account under the Plan in the event of such Participant’s death prior to exercise of the Participant’s
rights under the Plan. If the Participant is married and resides in a community property state, a designation of a person other than the Participant’s spouse as his or her beneficiary shall not be effective without the prior written consent of
the Participant’s spouse. 
 (b) Such designation of beneficiary may be changed by the Participant at any time by written notice to the
Company. In the event of the death of a Participant and in the absence of a beneficiary validly designated under the Plan who is living at the time of such Participant’s death, the Company shall deliver such shares and/or cash to the executor
or administrator of the estate of the Participant, or if no such executor or administrator has been appointed (to the knowledge of the Company), the Company, in its discretion, may deliver such shares and/or cash to the spouse or to any one or more
dependents or relatives of the Participant, or if no spouse, dependent or relative is known to the Company, then to such other person as the Company may designate. 
 12.5 Notices. All notices or other communications by a Participant to the Company under or in connection with the Plan shall be deemed to have been duly given when received in the form specified by the Company
at the location, or by the person, designated by the Company for the receipt thereof. 
  

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 12.6 Equal Rights and Privileges. All Eligible Employees of the Company or any Designated
Subsidiary will have equal rights and privileges under this Plan so that this Plan qualifies as an “employee stock purchase plan” within the meaning of Section 423 of the Code. Any provision of this Plan that is inconsistent with
Section 423 of the Code will, without further act or amendment by the Company, the Board or the Administrator, be reformed to comply with the equal rights and privileges requirement of Section 423 of the Code. 
 12.7 Use of Funds. All payroll deductions received or held by the Company under the Plan may be used by the Company for any corporate purpose, and
the Company shall not be obligated to segregate such payroll deductions. 
 12.8 Reports. Statements of account shall be given to
participating Employees at least annually, which statements shall set forth the amounts of payroll deductions, the Purchase Price, the number of shares purchased and the remaining cash balance, if any. 
 12.9 No Employment Rights. Nothing in the Plan shall be construed to give any person (including any Eligible Employee or Participant) the right to
remain in the employ of the Company or any Parent or Subsidiary or to affect the right of the Company or any Parent or Subsidiary to terminate the employment of any person (including any Eligible Employee or Participant) at any time, with or without
cause. 
 12.10 Notice of Disposition of Shares. Each Participant shall give prompt notice to the Company of any disposition or other
transfer of any shares of stock purchased upon exercise of a right under the Plan if such disposition or transfer is made: (a) within two years from the Enrollment Date of the Offering Period in which the shares were purchased or
(b) within one year after the Purchase Date on which such shares were purchased. Such notice shall specify the date of such disposition or other transfer and the amount realized, in cash, other property, assumption of indebtedness or other
consideration, by the Participant in such disposition or other transfer. 
 12.11 Governing Law. The validity and enforceability of
this Plan shall be governed by and construed in accordance with the laws of the State of California without regard to otherwise governing principles of conflicts of law. 
  


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