Document:

EX-10.19

 Exhibit 10.19 

ARDELYX, INC. 
 AMENDED
AND RESTATED CHANGE IN CONTROL SEVERANCE AGREEMENT 
 This Amended and Restated Change in Control Severance Agreement (the
“Agreement”) is made and entered into by and between David Rosenbaum, Ph.D. (the “Executive”) and Ardelyx, Inc. (the “Company”), effective as of the latest date set forth by the signatures of the
parties hereto below (the “Effective Date”). This Agreement amends and restates in its entirety that certain Change in Control Severance Agreement by and between Executive and the Company effective as of April 15, 2010 (the
“Prior Agreement”). 
 R E C I T A L S 

A. It is expected that the Company from time to time will consider the possibility of an acquisition by another company or other change in
control. The Board of Directors of the Company (the “Board”) recognizes that such consideration as well as the possibility of an involuntary termination or reduction in responsibility can be a distraction to Executive and can cause
Executive to consider alternative employment opportunities. The Board has determined that it is in the best interests of the Company and its stockholders to assure that the Company will have the continued dedication and objectivity of Executive,
notwithstanding the possibility, threat or occurrence of such an event. 
 B. The Board believes that it is in the best interests of the
Company and its stockholders to provide Executive with an incentive to continue Executive’s employment and to motivate Executive to maximize the value of the Company upon a Change in Control (as defined below) for the benefit of its
stockholders. 
 C. The Board believes that it is imperative to provide Executive with severance benefits upon certain terminations of
Executive’s service to the Company that enhance Executive’s financial security and provide incentive and encouragement to Executive to remain with the Company notwithstanding the possibility of such an event. 

D. Certain capitalized terms used in this Agreement are defined in Section 7 below. 

The parties hereto agree as follows: 

1. Term of Agreement. This Agreement shall become effective as of the Effective Date and terminate upon the date that all obligations
of the parties hereto with respect to this Agreement have been satisfied. 
 2. At-Will Employment. The Company and Executive
acknowledge that Executive’s employment is and shall continue to be “at-will,” as defined under applicable law. If Executive’s employment terminates for any reason, Executive shall not be entitled to any payments, benefits,
damages, awards or compensation other than as provided by this Agreement. 

 3. Covered Termination Other Than During a Change in Control Period. If Executive
experiences a Covered Termination other than during a Change in Control Period, and if Executive delivers to the Company a general release of all claims against the Company and its affiliates in a form acceptable to the Company (a “Release
of Claims”) that becomes effective and irrevocable within sixty (60) days, or such shorter period of time specified by the Company, following such Covered Termination, then in addition to any accrued but unpaid salary, bonus, vacation
and expense reimbursement payable in accordance with applicable law, the Company shall provide Executive with the following: 
 (a)
Severance. Executive shall be entitled to receive an amount equal to six (6) months of Executive’s Base Salary payable in substantially equal installments in accordance with the Company’s normal payroll policies, less
applicable withholdings, with such installments to commence as soon as administratively practicable following the date the Release of Claims is not subject to revocation and, in any event, within sixty (60) days following the date of the
Covered Termination. 
 (b) Continued Healthcare. If Executive elects to receive continued healthcare coverage pursuant to the
provisions of the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”), the Company shall directly pay, or reimburse Executive for, the premium for Executive and Executive’s covered dependents through
the earlier of (i) the six (6) month anniversary of the date of Executive’s termination of employment and (ii) the date Executive and Executive’s covered dependents, if any, become eligible for healthcare coverage under
another employer’s plan(s). Notwithstanding the foregoing, (i) if any plan pursuant to which such benefits are provided is not, or ceases prior to the expiration of the period of continuation coverage to be, exempt from the application of
Section 409A of the Code under Treasury Regulation Section 1.409A-1(a)(5), or (ii) the Company is otherwise unable to continue to cover Executive under its group health plans without penalty under applicable law (including without
limitation, Section 2716 of the Public Health Service Act), then, in either case, an amount equal to each remaining Company subsidy shall thereafter be paid to Executive in substantially equal monthly installments. After the Company ceases to
pay premiums pursuant to this Section 3(c), Executive may, if eligible, elect to continue healthcare coverage at Executive’s expense in accordance the provisions of COBRA. 

4. Covered Termination During a Change in Control Period. If Executive experiences a Covered Termination during a Change in Control
Period, and if Executive delivers to the Company a Release of Claims that becomes effective and irrevocable within sixty (60) days, or such shorter period of time specified by the Company, following such Covered Termination, then in addition to
any accrued but unpaid salary, bonus, vacation and expense reimbursement payable in accordance with applicable law, the Company shall provide Executive with the following: 

(a) Severance. Executive shall be entitled to receive an amount equal to 0.75 multiplied by the sum of: (i) Executive’s Base
Salary and (ii) Executive’s target annual bonus for the fiscal year of Executive’s termination, in each case, at the rate in effect immediately prior to Executive’s termination of employment payable in a cash lump sum, less
applicable withholdings, as soon as administratively practicable following the date the Release of Claims is not subject to revocation and, in any event, within sixty (60) days following the date of the Covered Termination. 

  
 -2- 

 (b) Equity Awards. Each outstanding equity award, including, without limitation, each
stock option and restricted stock award, held by Executive shall automatically become vested and, if applicable, exercisable and any forfeiture restrictions or rights of repurchase thereon shall immediately lapse, in each case, with respect to one
hundred percent (100%) of the shares subject thereto. To the extent vested after giving effect to the acceleration provided in the preceding sentence, each stock option held by Executive shall remain exercisable until the earlier of the
original expiration date for such stock option or the first anniversary of Executive’s Covered Termination. 
 (c) Continued
Healthcare. If Executive elects to receive continued healthcare coverage pursuant to the provisions of COBRA, the Company shall directly pay, or reimburse Executive for, the premium for Executive and Executive’s covered dependents through
the earlier of (i) the nine (9) month anniversary of the date of Executive’s termination of employment and (ii) the date Executive and Executive’s covered dependents, if any, become eligible for healthcare coverage under
another employer’s plan(s). Notwithstanding the foregoing, (i) if any plan pursuant to which such benefits are provided is not, or ceases prior to the expiration of the period of continuation coverage to be, exempt from the application of
Section 409A of the Code under Treasury Regulation Section 1.409A-1(a)(5), or (ii) the Company is otherwise unable to continue to cover Executive under its group health plans without penalty under applicable law (including without
limitation, Section 2716 of the Public Health Service Act), then, in either case, an amount equal to each remaining Company subsidy shall thereafter be paid to Executive in substantially equal monthly installments. After the Company ceases to
pay premiums pursuant to this Section 4(c), Executive may, if eligible, elect to continue healthcare coverage at Executive’s expense in accordance the provisions of COBRA. 

5. Other Terminations. If Executive’s service with the Company is terminated by the Company or by Executive for any or no reason
other than as a Covered Termination, then Executive shall not be entitled to any benefits hereunder other than accrued but unpaid salary, bonus, vacation and expense reimbursement in accordance with applicable law and to elect any continued
healthcare coverage as may be required under COBRA or similar state law. 
 6. Limitation on Payments. Notwithstanding anything in
this Agreement to the contrary, if any payment or distribution Executive would receive pursuant to this Agreement or otherwise (“Payment”) would (a) constitute a “parachute payment” within the meaning of
Section 280G of the Code, and (b) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall either be (i) delivered in full, or
(ii) delivered as to such lesser extent which would result in no portion of such Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the
Excise Tax, results in the receipt by Executive on an after-tax basis, of the largest payment, notwithstanding that all or some portion the Payment may be taxable under Section 4999 of the Code. The accounting firm engaged by the Company for
general audit purposes 

  
 -3- 

 
as of the day prior to the effective date of the Change in Control shall perform the foregoing calculations. The Company shall bear all expenses with respect to the determinations by such
accounting firm required to be made hereunder. The accounting firm shall provide its calculations to the Company and Executive within fifteen (15) calendar days after the date on which Executive’s right to a Payment is triggered (if
requested at that time by the Company or Executive) or such other time as requested by the Company or Executive. Any good faith determinations of the accounting firm made hereunder shall be final, binding and conclusive upon the Company and
Executive. Any reduction in payments and/or benefits pursuant to this Section 6 will occur in the following order: (1) reduction of cash payments; (2) cancellation of accelerated vesting of equity awards other than stock options;
(3) cancellation of accelerated vesting of stock options; and (4) reduction of other benefits payable to Executive. 
 7.
Definition of Terms. The following terms referred to in this Agreement shall have the following meanings: 
 (a) Base Salary.
“Base Salary” means Executive’s annual base salary in effect immediately prior to Executive’s termination (disregarding any reduction in base salary that would give rise to Executive’s right to a Voluntary Resignation
for Good Reason). 
 (b) Cause. “Cause” means (i) Executive’s theft, dishonesty or falsification of any
employment or Company records that is non-trivial in nature; (ii) Executive’s malicious or reckless disclosure of the Company’s confidential or proprietary information or any material breach by Executive of his or her obligations
under the Confidential Information Agreement (as defined below); (iii) the conviction of the Executive of a felony (excluding motor vehicle violations) or the commission of gross negligence or willful misconduct, where a majority of the
non-employee members of the Board reasonably determines that such act or misconduct has (A) seriously undermined the ability of the Board or management of the Company to entrust Executive with important matters or otherwise work effectively
with Executive, (B) substantially contributed to the Company’s loss of significant revenues or business opportunities, or (C) significantly and detrimentally affected the business or reputation of the Company or any of its
subsidiaries; and/or (iv) the willful failure or refusal by Executive to follow the reasonable and lawful directives of the Board or Executive’s direct supervisor, provided such willful failure or refusal continues after Executive’s
receipt of reasonable notice in writing of such failure or refusal and a reasonable opportunity of not less than 30 days to correct the problem. For the purpose of this Agreement, no act, or failure to act, shall be considered “willful”
unless undertaken by Executive with an absence of good faith that this act, or failure to act, was in the best interests of the Company. 

(c) Change in Control. “Change in Control” shall have the meaning set forth in the Company’s 2014 Equity
Incentive Award Plan, as it may be amended from time to time, provided that such event must also constitute a “change in control event” as defined in Treasury Regulation Section 1.409A-3(i)(5). 

(d) Change in Control Period. “Change in Control Period” means the period of time beginning three (3) months
prior to and ending twelve (12) months following a Change in Control. 

  
 -4- 

 (e) Covered Termination. “Covered Termination” means (a) an
Involuntary Termination Without Cause or (b) a Voluntary Resignation for Good Reason, provided that such termination or resignation constitutes a Separation from Service. 

(f) Good Reason Condition. “Good Reason Condition” means that any of the following are undertaken without
Executive’s express written consent: (i) a material diminution in Executive’s authority, duties, or responsibilities which substantially reduces the nature or character of Executive’s position with the Company; (ii) a
material reduction by the Company of Executive’s base salary as in effect immediately prior to such reduction; (iii) a relocation of Executive’s principal office to a location more than fifty (50) miles from the location
of Executive’s principal office as of immediately prior to such relocation, except for required travel by Executive on the Company’s business; or (iv) any material breach by the Company of any provision of Executive’s employment
agreement or offer letter agreement which the Company does not cure within 30 days following written notice thereof from Executive. 
 (g)
Involuntary Termination Without Cause. “Involuntary Termination Without Cause” means Executive’s dismissal or discharge by the Company other than for Cause. The termination of Executive’s employment as a result of
Executive’s death or inability to perform the essential functions of his job due to disability will not be deemed to be an Involuntary Termination Without Cause. 

(h) Separation from Service. “Separation from Service” means Executive’s termination of employment or service
constitutes a “separation from service” within the meaning of Treasury Regulation Section 1.409A-1(h). 
 (i) Voluntary
Resignation for Good Reason. “Voluntary Resignation for Good Reason” means Executive’s resignation as a result of a Good Reason Condition in accordance with this subsection (i). In order for a resignation to constitute a
Voluntary Resignation for Good Reason, Executive must provide written notice to the Company of the existence of the Good Reason Condition within thirty (30) days of the initial existence of such Good Reason Condition. Upon receipt of such
notice of the Good Reason Condition, the Company will be provided with a period of thirty (30) days during which it may remedy the Good Reason Condition and not be required to provide for the payments and benefits described in Sections 3 or 4
as a result of such proposed resignation due to the Good Reason Condition specified in the notice. If the Good Reason Condition is not remedied within the period specified in the preceding sentence, Executive may resign for Good Reason based on the
Good Reason Condition specified in the notice, provided that such resignation must occur within sixty (60) days after the initial existence of such Good Reason Condition. 

8. Successors. 
 (a)
Company’s Successors. Any successor to the Company (whether direct or indirect and whether by purchase, merger, consolidation, liquidation or otherwise) to all or substantially all of the Company’s business and/or assets shall
assume the obligations under this Agreement and agree expressly to perform the obligations under this Agreement in the same manner 

  
 -5- 

 
and to the same extent as the Company would be required to perform such obligations in the absence of a succession. For all purposes under this Agreement, the term “Company” shall
include any successor to the Company’s business and/or assets which executes and delivers the assumption agreement described in this Section 8(a) or which becomes bound by the terms of this Agreement by operation of law. 

(b) Executive’s Successors. The terms of this Agreement and all rights of Executive hereunder shall inure to the benefit of, and
be enforceable by, Executive’s personal or legal representatives, executors, administrators, successors, heirs, distributees, devisees and legatees. 

9. Notices. Notices and all other communications contemplated by this Agreement shall be in writing and shall be deemed to have been
duly given when personally delivered or one day following mailing via Federal Express or similar overnight courier service. In the case of Executive, mailed notices shall be addressed to Executive at Executive’s home address that the Company
has on file for Executive. In the case of the Company, mailed notices shall be addressed to its primary office location, and all notices shall be directed to the attention of its Vice President of Finance and Operations. 

10. Confidentiality; Non-Solicitation. 

(a) Confidentiality. While Executive is employed by the Company, and thereafter, Executive shall not directly or indirectly disclose or
make available to any person, firm, corporation, association or other entity for any reason or purpose whatsoever, any Confidential Information (as defined below). Upon termination of Executive’s employment with the Company, all Confidential
Information in Executive’s possession that is in written or other tangible form (together with all copies or duplicates thereof, including computer files) shall be returned to the Company and shall not be retained by Executive or furnished to
any third party, in any form except as provided herein; provided, however, that Executive shall not be obligated to treat as confidential, or return to the Company copies of any Confidential Information that (i) was publicly known at the
time of disclosure to Executive, (ii) becomes publicly known or available thereafter other than by any means in violation of this Agreement or any other duty owed to the Company by any person or entity, or (iii) is lawfully disclosed to
Executive by a third party. For purposes of this Agreement, the term “Confidential Information” shall mean information disclosed to Executive or known by Executive as a consequence of or through his or her relationship with the
Company, about the customers, employees, business methods, public relations methods, organization, procedures or finances, including, without limitation, information of or relating to customer lists, of the Company and its affiliates. In addition,
Executive shall continue to be subject to the Proprietary Information and Inventions Assignment Agreement entered into between Executive and the Company (the “Confidential Information Agreement”). 

(b) Non-Solicitation. In addition to each Executive’s obligations under the Confidential Information Agreement, Executive shall
not for a period of two (2) years following Executive’s termination of employment for any reason, either on Executive’s own account or jointly with or as a manager, agent, officer, employee, consultant, partner, joint venturer, owner
or stockholder or otherwise on behalf of any other person, firm or corporation, directly or indirectly 

  
 -6- 

 
solicit or attempt to solicit away from the Company any of its officers or employees or offer employment to any person who is an officer or employee of the Company; provided, however, that
a general advertisement to which an employee of the Company responds shall in no event be deemed to result in a breach of this Section 10(b). Executive also agrees not to harass or disparage the Company or its employees, clients, directors or
agents or divert or attempt to divert any actual or potential business of the Company. 
 (c) Survival of Provisions. The provisions
of this Section 10 shall survive the termination or expiration of the applicable Executive’s employment with the Company and shall be fully enforceable thereafter. If it is determined by a court of competent jurisdiction in any state that
any restriction in this Section 10 is excessive in duration or scope or is unreasonable or unenforceable under the laws of that state, it is the intention of the parties that such restriction may be modified or amended by the court to render it
enforceable to the maximum extent permitted by the law of that state. 
 11. Dispute Resolution. To ensure the timely and
economical resolution of disputes that arise in connection with this Agreement, Executive and the Company agree that any and all disputes, claims, or causes of action arising from or relating to the enforcement, breach, performance or interpretation
of this Agreement, Executive’s employment, or the termination of Executive’s employment, shall be resolved to the fullest extent permitted by law by final, binding and confidential arbitration, by a single arbitrator, in Alameda County,
California, conducted by Judicial Arbitration and Mediation Services, Inc. (“JAMS”) under the applicable JAMS employment rules. By agreeing to this arbitration procedure, both Executive and the Company waive the right to resolve
any such dispute through a trial by jury or judge or administrative proceeding. The arbitrator shall: (i) have the authority to compel adequate discovery for the resolution of the dispute and to award such relief as would otherwise be
permitted by law; and (ii) issue a written arbitration decision, to include the arbitrator’s essential findings and conclusions and a statement of the award. The arbitrator shall be authorized to award any or all remedies that Executive or
the Company would be entitled to seek in a court of law. The Company shall pay all JAMS’ arbitration fees in excess of the amount of court fees that would be required if the dispute were decided in a court of law. Nothing in this Agreement is
intended to prevent either Executive or the Company from obtaining injunctive relief in court to prevent irreparable harm pending the conclusion of any such arbitration. Notwithstanding the foregoing, Executive and the Company each have the right to
resolve any issue or dispute over intellectual property rights by Court action instead of arbitration. 
 12. Miscellaneous
Provisions. 
 (a) Section 409A. 

(i) Separation from Service. Notwithstanding any provision to the contrary in this Agreement, no amount deemed deferred compensation
subject to Section 409A of the Code shall be payable pursuant to Section 3 unless Executive’s termination of employment constitutes a Separation from Service and, except as provided under Section 12(a)(ii) of this Agreement, any
such amount shall not be paid, or in the case of installments, commence payment, until the sixtieth (60th) day following Executive’s Separation from Service. Any installment

  
 -7- 

 
payments that would have been made to Executive during the sixty (60) day period immediately following Executive’s Separation from Service but for the preceding sentence shall be paid
to Executive on the sixtieth (60th) day following Executive’s Separation from Service and the remaining payments shall be made as provided in this Agreement. 

(ii) Specified Employee. Notwithstanding any provision to the contrary in this Agreement, if Executive is deemed at the time of his
separation from service to be a “specified employee” for purposes of Section 409A(a)(2)(B)(i) of the Code, to the extent delayed commencement of any portion of the benefits to which Executive is entitled under this Agreement is
required in order to avoid a prohibited distribution under Section 409A(a)(2)(B)(i) of the Code, such portion of Executive’s benefits shall not be provided to Executive prior to the earlier of (a) the expiration of the six (6)-month
period measured from the date of the Executive’s Separation from Service or (b) the date of Executive’s death. Upon the first business day following the expiration of the applicable Code Section 409A(a)(2)(B)(i) period, all
payments deferred pursuant to this Section 12(a)(ii) shall be paid in a lump sum to Executive, and any remaining payments due under this Agreement shall be paid as otherwise provided herein. 

(iii) Expense Reimbursements. To the extent that any reimbursements payable pursuant to this Agreement are subject to the provisions
of Section 409A of the Code, any such reimbursements payable to Executive pursuant to this Agreement shall be paid to Executive no later than December 31 of the year following the year in which the expense was incurred, the amount of
expenses reimbursed in one year shall not affect the amount eligible for reimbursement in any subsequent year, and Executive’s right to reimbursement under this Agreement will not be subject to liquidation or exchange for another benefit. 

(iv) Installments. For purposes of Section 409A of the Code (including, without limitation, for purposes of Treasury Regulation
Section 1.409A-2(b)(2)(iii)), Executive’s right to receive any installment payments under this Agreement shall be treated as a right to receive a series of separate payments and, accordingly, each such installment payment shall at all
times be considered a separate and distinct payment. 
 (b) Waiver. No provision of this Agreement shall be modified, waived or
discharged unless the modification, waiver or discharge is agreed to in writing and signed by Executive and by an authorized officer of the Company (other than Executive). No waiver by either party of any breach of, or of compliance with, any
condition or provision of this Agreement by the other party shall be considered a waiver of any other condition or provision or of the same condition or provision at another time. 

(c) Whole Agreement. This Agreement and the Confidential Information Agreement represent the entire understanding of the parties hereto
with respect to the subject matter hereof and supersede all prior arrangements and understandings regarding same, including, without limitation, the Prior Agreement and any accelerated vesting provisions of any equity award agreement by and between
Executive and the Company. 

  
 -8- 

 (d) Choice of Law. The validity, interpretation, construction and performance of this
Agreement shall be governed by the laws of the State of California. 
 (e) Severability. The invalidity or unenforceability of any
provision or provisions of this Agreement shall not affect the validity or enforceability of any other provision hereof, which shall remain in full force and effect. 

(f) Counterparts. This Agreement may be executed in counterparts, each of which shall be deemed an original, but all of which together
will constitute one and the same instrument. 
 (Signature page follows) 

  
 -9- 

 IN WITNESS WHEREOF, each of the parties has executed this Agreement, in the case of the Company
by its duly authorized officer, as of the day and year set forth below. 
  

			
	ARDELYX, INC.
		
	By:	 	 /S/ MICHAEL RAAB

		
	Title:	 	 CEO

		
	Date:	 	 06/06/2014

	
	EXECUTIVE
	
	 /S/ DAVID ROSENBAUM

	David Rosenbaum, Ph.D.
		
	Date:	 	 5 June 2014

  
 -10-EX-10.20

 Exhibit 10.20 

ARDELYX, INC. 
 2014
EMPLOYEE STOCK PURCHASE PLAN 
 ARTICLE I. 

PURPOSE, SCOPE AND ADMINISTRATION OF THE PLAN 

1.1 Purpose and Scope. The purpose of the Ardelyx, Inc. 2014 Employee Stock Purchase Plan, as it may be amended from time to time, (the
“Plan”) is to assist employees of Ardelyx, Inc., a Delaware corporation, (the “Company”) and its Designated 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” under Section 423 of the Code and to help such employees provide for their future security and to encourage them to remain in the employment of the Company and its Subsidiaries. 

ARTICLE II. 
 DEFINITIONS

 Whenever the following terms are used in the Plan, they shall have the meaning specified below unless the context clearly indicates
to the contrary. The singular pronoun shall include the plural where the context so indicates. 
 2.1 “Agent” means the
brokerage firm, bank or other financial institution, entity or person(s), if any, engaged, retained, appointed or authorized to act as the agent of the Company or an Employee with regard to the Plan. 

2.2 “Administrator” shall mean the Committee, or such individuals to which authority to administer the Plan has been
delegated under Section 7.1 hereof. 
 2.3 “Board” shall mean the Board of Directors of the Company. 

2.4 “Code” shall mean the Internal Revenue Code of 1986, as amended. 

2.5 “Committee” shall mean the Compensation Committee of the Board. 

2.6 “Common Stock” shall mean the common stock of the Company. 

2.7 “Company” shall have such meaning as set forth in Section 1.1 hereof. 

2.8 “Compensation” of an Employee shall mean the regular straight-time earnings or base salary paid to the Employee from the
Company on each Payday as compensation for services to the Company or any Designated Subsidiary, before deduction for any salary deferral contributions made by the Employee to any tax-qualified or nonqualified deferred compensation plan, including
overtime, shift differentials, vacation pay, salaried production schedule premiums, holiday pay, jury duty pay, funeral leave pay, paid time off, military pay, prior week adjustments and weekly bonus, but excluding bonuses and commissions, education
or tuition reimbursements, imputed income arising under any group 

 
insurance or benefit program, travel expenses, business and moving reimbursements, income received in connection with any stock options, restricted stock, restricted stock units or other
compensatory equity awards and all contributions made by the Company or any Designated Subsidiary for the Employee’s benefit under any employee benefit plan now or hereafter established. Such Compensation shall be calculated before deduction of
any income or employment tax withholdings, but shall be withheld from the Employee’s net income. 
 2.9 “Designated
Subsidiary” shall mean each Subsidiary that have been designated by the Board or Committee from time to time in its sole discretion as eligible to participate in the Plan, including any Subsidiary in existence on the Effective Date
and any Subsidiary formed or acquired following the Effective Date, in accordance with Section 7.2 hereof. 
 2.10 “Effective
Date” shall mean the date immediately preceding the date the Company’s registration statement relating to its initial public offering becomes effective, provided that the Board has adopted and the Company’s stockholders
have approved the Plan prior to or on such date. 
 2.11 “Eligible Employee” shall mean an Employee who (a) is
customarily scheduled to work at least twenty (20) hours per week, (b) whose customary employment is more than five (5) months in a calendar year and (c) after the granting of the Option would not be deemed for purposes of
Section 423(b)(3) of the Code to possess five percent (5%) or more of the total combined voting power or value of all classes of stock of the Company or any Subsidiary. For purposes of clause (c), 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.
Notwithstanding the foregoing, the Administrator may exclude from participation in the Plan as an Eligible Employee (x) any Employee that is a “highly compensated employee” of the Company or any Designated Subsidiary (within the
meaning of Section 414(q) of the Code), or that is such a “highly compensated employee” (A) with compensation above a specified level, (B) who is an officer and/or (C) is subject to the disclosure requirements of
Section 16(a) of the Exchange Act and/or (y) any Employee who is a citizen or resident of a foreign jurisdiction (without regard to whether they are also a citizen of the United States or a resident alien (within the meaning of
Section 7701(b)(1)(A) of the Code)) if either (i) the grant of the Option is prohibited under the laws of the jurisdiction governing such Employee, or (ii) compliance with the laws of the foreign jurisdiction would cause the Plan or
the Option to violate the requirements of Section 423 of the Code; provided that any exclusion in clauses (x), and/or (y) shall be applied in an identical manner under each Offering Period to all Employees of the Company and all
Designated Subsidiaries, in accordance with Treasury Regulation Section 1.423-2(e). 
 2.12 “Employee” shall mean any
person who renders services to the Company or a Designated Subsidiary in the status of an employee within the meaning of Section 3401(c) of the Code. “Employee” shall not include any director of the Company or a Designated Subsidiary
who does not render services to the Company or a Designated Subsidiary in the status of an employee within the meaning of Section 3401(c) of the Code. For purposes of the Plan, the employment relationship shall be treated as continuing intact
while the individual is on military 

  
 2 

 
leave, sick leave or other leave of absence approved by the Company or Designated Subsidiary and meeting the requirements of Treasury Regulation Section 1.421-1(h)(2). Where the period of
leave exceeds three (3) months, or such other period specified in Treasury Regulation Section 1.421-1(h)(2), and the individual’s right to reemployment is not guaranteed either by statute or by contract, the employment relationship
shall be deemed to have terminated on the first day immediately following such three (3)-month period, or such other period specified in Treasury Regulation Section 1.421-1(h)(2). 

2.13 “Enrollment Date” shall mean the first date of each Offering Period. 

2.14 “Exercise Date” shall mean the last Trading Day of each Offering Period, except as provided in Section 5.2 hereof.

 2.15 “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended. 

2.16 “Fair Market Value” shall mean, as of any date, the value of Common Stock determined as follows: 

(a) If the Common Stock is (i) listed on any established securities exchange (such as the New York Stock Exchange, the NASDAQ Global
Market and the NASDAQ Global Select Market), (ii) listed on any national market system or (iii) listed, quoted or traded on any automated quotation system, its Fair Market Value shall be the closing sales price for a share of Common Stock
as quoted on such exchange or system for such date or, if there is no closing sales price for a share of Common Stock on the date in question, the closing sales price for a share of Stock on the last preceding date for which such quotation exists,
as reported in The Wall Street Journal or such other source as the Administrator deems reliable; 
 (b) If the Common Stock is not
listed on an established securities exchange, national market system or automated quotation system, but the Common Stock is regularly quoted by a recognized securities dealer, its Fair Market Value shall be the mean of the high bid and low asked
prices for such date or, if there are no high bid and low asked prices for a share of Common Stock on such date, the high bid and low asked prices for a share of Common Stock on the last preceding date for which such information exists, as reported
in The Wall Street Journal or such other source as the Administrator deems reliable; or 
 (c) If the Common Stock is neither listed
on an established securities exchange, national market system or automated quotation system nor regularly quoted by a recognized securities dealer, its Fair Market Value shall be established by the Administrator in good faith. 

2.17 “Grant Date” shall mean the first Trading Day of an Offering Period. 

2.18 “New Exercise Date” shall have such meaning as set forth in Section 5.2(b) hereof. 

2.19 “Offering Period” shall mean the six (6)-month period commencing on each March 1 and September 1 following the
Effective Date, except as otherwise provided under Section 5.3 hereof; provided, however, that the first Offering Period commencing on or after the 

  
 3 

 
Effective Date shall commence and end on the dates determined by the Administrator. The duration and timing of Offering Periods may be changed by the Board or Committee, in its sole discretion.
In no event may an Offering Period exceed twenty-seven (27) months. 
 2.20 “Option” shall mean the right to purchase
shares of Common Stock pursuant to the Plan during each Offering Period. 
 2.21 “Option Price” shall mean the purchase
price of a share of Common Stock hereunder as provided in Section 4.2 hereof. 
 2.22 “Parent” means any entity that
is a parent corporation of the Company within the meaning of Section 424 of the Code and the Treasury Regulations thereunder. 
 2.23
“Participant” shall mean any Eligible Employee who elects to participate in the Plan. 
 2.24 “Payday”
shall mean the regular and recurring established day for payment of Compensation to an Employee of the Company or any Designated Subsidiary. 

2.25 “Plan” shall have such meaning as set forth in Section 1.1 hereof. 

2.26 “Plan Account” shall mean a bookkeeping account established and maintained by the Company in the name of each
Participant. 
 2.27 “Section 423 Option” shall have such meaning as set forth in Section 3.1(b) hereof. 

2.28 “Subsidiary” shall mean any entity that is a subsidiary corporation of the Company within the meaning of
Section 424 of the Code and the Treasury Regulations thereunder. In addition, with respect to any sub-plans adopted under Section 7.1(d) hereof which are designed to be outside the scope of Section 423 of the Code, Subsidiary shall
include any corporate or noncorporate entity in which the Company has a direct or indirect equity interest or significant business relationship. 

2.29 “Trading Day” shall mean a day on which the principal securities exchange on which the Common Stock is listed is open
for trading or, if the Common Stock is not listed on a securities exchange, shall mean a business day, as determined by the Administrator in good faith. 

2.30 “Withdrawal Election” shall have such meaning as set forth in Section 6.1(a) hereof. 

  
 4 

 ARTICLE III. 

PARTICIPATION 
 3.1
Eligibility. 
 (a) Any Eligible Employee who shall be employed by the Company or a Designated Subsidiary on 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 Articles IV and V hereof, and the limitations imposed by Section 423(b) of the Code and the Treasury Regulations
thereunder. 
 (b) No Eligible Employee shall be granted an Option under the Plan which permits the Participant’s rights to purchase
shares of Common Stock under the Plan, and to purchase stock under all other employee stock purchase plans of the Company, any Parent or any Subsidiary subject to the Section 423 of the Code (any such Option or other option, a “Section
423 Option”), to accrue at a rate which exceeds $25,000 of fair market value of such stock (determined at the time the Section 423 Option is granted) for each calendar year in which any Section 423 Option granted to the
Participant is outstanding at any time. For purposes of the limitation imposed by this subsection, 
 (i) the right to
purchase stock under a Section 423 Option accrues when the Section 423 Option (or any portion thereof) first becomes exercisable during the calendar year, 

(ii) the right to purchase stock under a Section 423 Option accrues at the rate provided in the Section 423 Option,
but in no case may such rate exceed $25,000 of fair market value of such stock (determined at the time such option is granted) for any one calendar year, and 

(iii) a right to purchase stock which has accrued under a Section 423 Option may not be carried over to any other
Section 423 Option; provided that Participants may carry forward amounts so accrued that represent a fractional share of stock and were withheld but not applied towards the purchase of Common Stock under an earlier Offering Period, and
may apply such amounts towards the purchase of additional shares of Common Stock under a subsequent Offering Period. 
 The limitation under this
Section 3.1(b) shall be applied in accordance with Section 423(b)(8) of the Code and the Treasury Regulations thereunder. 
 3.2
Election to Participate; Payroll Deductions 
 (a) Except as provided in Section 3.3 hereof, an Eligible Employee may become a
Participant in the Plan only by means of payroll deduction. Each individual who is an Eligible Employee as of an Offering Period’s Enrollment Date may elect to participate in such Offering Period and the Plan by delivering to the Company a
payroll deduction authorization no later such period of time prior to the applicable Enrollment Date as determined by the Administrator, in its sole discretion. 

(b) Subject to Section 3.1(b) hereof, payroll deductions (i) shall be equal to at least one percent (1%) of the
Participant’s Compensation as of each Payday of the Offering Period following the Enrollment Date, but not more than the lesser of fifteen percent (15%)of the Participant’s Compensation as of each Payday of the Offering Period following
the Enrollment Date or $25,000 per Offering Period; and (ii) may be expressed either as (A) a whole 

  
 5 

 
number percentage, or (B) a fixed dollar amount. Amounts deducted from a Participant’s Compensation with respect to an Offering Period pursuant to this Section 3.2 shall be
deducted each Payday through payroll deduction and credited to the Participant’s Plan Account. 
 (c) Following at least one
(1) payroll deduction, a Participant may decrease (to as low as zero) the amount deducted from such Participant’s Compensation only once during an Offering Period upon ten (10) calendar days’ prior written notice to the Company.
A Participant may not increase the amount deducted from such Participant’s Compensation during an Offering Period. 
 (d)
Notwithstanding the foregoing, upon the termination of an Offering Period, each Participant in such Offering Period shall automatically participate in the immediately following Offering Period at the same payroll deduction percentage or fixed amount
as in effect at the termination of the prior Offering Period, unless such Participant delivers to the Company a different election with respect to the successive Offering Period in accordance with Section 3.1(a) hereof, or unless such
Participant becomes ineligible for participation in the Plan. 
 3.3 Leave of Absence. During leaves of absence approved by the
Company meeting the requirements of Treasury Regulation Section 1.421-1(h)(2) under the Code, a Participant may continue participation in the Plan by making cash payments to the Company on his or her normal payday equal to his or her authorized
payroll deduction. 
 ARTICLE IV. 

PURCHASE OF SHARES 
 4.1
Grant of Option. Each Participant shall be granted an Option with respect to an Offering Period on the applicable Grant Date. Subject to the limitations of Section 3.1(b) hereof, the number of shares of Common Stock subject to a
Participant’s Option shall be determined by dividing (a) such Participant’s payroll deductions accumulated prior to such Exercise Date and retained in the Participant’s Plan Account on such Exercise Date by (b) the
applicable Option Price; provided that in no event shall a Participant be permitted to purchase during each Offering Period more than 3,0001 shares of Common Stock (subject to any
adjustment pursuant to Section 5.2 hereof). The Administrator may, for future Offering Periods, increase or decrease, in its absolute discretion, the maximum number of shares of Common Stock that a Participant may purchase during such future
Offering Periods. Each Option shall expire on the Exercise Date for the applicable Offering Period immediately after the automatic exercise of the Option in accordance with Section 4.3 hereof, unless such Option terminates earlier in accordance
with Article 6 hereof. 
 4.2 Option Price. The “Option Price” per share of Common Stock to be paid by a Participant
upon exercise of the Participant’s Option on the applicable Exercise Date for an Offering Period shall be equal to eighty five percent (85%) of the lesser of the Fair Market Value of a share of Common Stock on (a) the applicable Grant
Date and (b) the applicable Exercise Date; provided that in no event shall the Option Price per share of Common Stock be less than the par value per share of the Common Stock. 

 

	1 	Note: Not to be proportionally adjusted for any reverse split that occurs in connection with the IPO. 

  
 6 

 4.3 Purchase of Shares. 

(a) On the applicable Exercise Date for an Offering Period, each Participant shall automatically and without any action on such
Participant’s part be deemed to have exercised his or her Option to purchase at the applicable per share Option Price the largest number of whole shares of Common Stock which can be purchased with the amount in the Participant’s Plan
Account. Any balance less than the per share Option Price that is remaining in the Participant’s Plan Account (after exercise of such Participant’s Option) as of the Exercise Date shall be carried forward to the next Offering Period,
unless the Participant has elected to withdraw from the Plan pursuant to Section 6.1 hereof or, pursuant to Section 6.2 hereof, such Participant has ceased to be an Eligible Employee. Any balance not carried forward to the next Offering
Period in accordance with the prior sentence promptly shall be refunded to the applicable Participant. For the avoidance of doubt, in no event shall an amount greater than or equal to the per share Option Price as of an Exercise Date be carried
forward to the next Offering Period. 
 (b) As soon as practicable following the applicable Exercise Date, the number of shares of Common
Stock purchased by such Participant pursuant to Section 4.3(a) hereof shall be delivered (either in share certificate or book entry form), in the Company’s sole discretion, to either (i) the Participant or (ii) an account
established in the Participant’s name at a stock brokerage or other financial services firm designated by the Company. If the Company is required to obtain from any commission or agency authority to issue any such shares of Common Stock, the
Company shall seek to obtain such authority. Inability of the Company to obtain from any such commission or agency authority which counsel for the Company deems necessary for the lawful issuance of any such shares shall relieve the Company from
liability to any Participant except to refund to the Participant such Participant’s Plan Account balance, without interest thereon. 

4.4 Transferability of Rights. 

(a) An Option granted under the Plan shall not be transferable, other than by will or the applicable laws of descent and distribution, and is
exercisable during the Participant’s lifetime only by the Participant. No option or interest or right to the Option shall be available to pay off any debts, contracts or engagements of the Participant or his or her successors in interest or
shall be subject to disposition by pledge, encumbrance, assignment or any other means whether such disposition be voluntary or involuntary or by operation of law by judgment, levy, attachment, garnishment or any other legal or equitable proceedings
(including bankruptcy), and any attempt at disposition of the option shall have no effect. 

  
 7 

 ARTICLE V. 

PROVISIONS RELATING TO COMMON STOCK 

5.1 Common Stock Reserved. Subject to adjustment as provided in Section 5.2 hereof, the maximum number of shares of Common Stock
that shall be made available for sale under the Plan shall be the sum of (a) 1,824,8582 shares of Common Stock and (b) an annual increase on the first day of each year beginning in 2015
and ending in 2024, in each case subject to the approval of the Administrator on or prior to the applicable date, equal to the lesser of (i) one percent (1%) of the shares of Common Stock outstanding (on an as converted basis) on the last
day of the immediately preceding fiscal year and (ii) such number of shares of Common Stock as determined by the Board; provided, however, no more than 20,073,3663 shares
of Common Stock may be issued under the Plan. Shares of Common Stock made available for sale under the Plan may be authorized but unissued shares, treasury shares of Common Stock, or reacquired shares reserved for issuance under the Plan. 

5.2 Adjustments Upon Changes in Capitalization, Dissolution, Liquidation, Merger or Asset Sale. 

(a) Changes in Capitalization. Subject to any required action by the stockholders of the Company, the number of shares of Common Stock
which have been authorized for issuance under the Plan but not yet placed under Option, as well as the price per share and the number of shares of Common Stock covered by each Option under the Plan which has not yet been exercised shall be
proportionately adjusted for any increase or decrease in the number of issued shares of Common Stock resulting from a stock split, reverse stock split, stock dividend, combination or reclassification of the Common Stock, or any other increase or
decrease in the number of shares of Common Stock effected without receipt of consideration by the Company; provided, however, that conversion of any convertible securities of the Company shall not be deemed to have been “effected
without receipt of consideration.” Such adjustment shall be made by the Administrator, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, 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 or price of shares of Common Stock subject to an Option. 

(b) Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the Company, the Offering Period then in
progress shall be shortened by setting a new Exercise Date (the “New Exercise Date”), and shall terminate immediately prior to the consummation of such proposed dissolution or liquidation, unless provided otherwise by the
Administrator. The New Exercise Date shall be before the date of the Company’s proposed dissolution or liquidation. The Administrator shall notify each Participant in writing, at least ten (10) business days prior to the New Exercise Date,
that the Exercise Date for the Participant’s Option has been changed to the New Exercise Date and that the Participant’s Option shall be exercised automatically on the New Exercise Date, unless prior to such date the Participant has
withdrawn from the Offering Period as provided in Section 6.1 hereof. 
 (c) Merger or Asset Sale. In the event of a proposed
sale of all or substantially all of the assets of the Company, or the merger of the Company with or into another corporation, each outstanding Option shall be assumed or an equivalent Option substituted by the successor corporation or a Parent or
Subsidiary of the successor corporation. In the event that the successor corporation refuses to assume or substitute for the Option, any Offering Periods then 

 

	2 	Note: To be proportionally adjusted for any reverse split that occurs in connection with the IPO. 

	3 	 Note: To be proportionally adjusted for any reverse split that occurs in connection with the IPO.

  
 8 

 
in progress shall be shortened by setting a New Exercise Date and any Offering Periods then in progress shall end on the New Exercise Date. The New Exercise Date shall be before the date of the
Company’s proposed sale or merger. The Administrator shall notify each Participant in writing, at least ten (10) business days prior to the New Exercise Date, that the Exercise Date for the Participant’s Option has been changed to the
New Exercise Date and that the Participant’s Option shall be exercised automatically on the New Exercise Date, unless prior to such date the Participant has withdrawn from the Offering Period as provided in Section 6.1 hereof. 

5.3 Insufficient Shares. If the Administrator determines that, on a given Exercise Date, the number of shares of Common Stock with
respect to which Options are to be exercised may exceed the number of shares of Common Stock remaining available for sale under the Plan on such Exercise Date, the Administrator shall make a pro rata allocation of the shares of Common Stock
available for issuance on such Exercise Date in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all Participants exercising Options to purchase Common Stock on such Exercise Date,
and unless additional shares are authorized for issuance under the Plan, no further Offering Periods shall take place and the Plan shall terminate pursuant to Section 7.5 hereof. If an Offering Period is so terminated, then the balance of the
amount credited to the Participant’s Plan Account which has not been applied to the purchase of shares of Common Stock shall be paid to such Participant in one lump sum in cash within thirty (30) days after such Exercise Date, without any
interest thereon. 
 5.4 Rights as Stockholders. With respect to shares of Common Stock subject to an Option, a Participant shall not
be deemed to be a stockholder of the Company and shall not have any of the rights or privileges of a stockholder. A Participant shall have the rights and privileges of a stockholder of the Company when, but not until, shares of Common Stock have
been deposited in the designated brokerage account following exercise of his or her Option. 
 ARTICLE VI. 

TERMINATION OF PARTICIPATION 

6.1 Cessation of Contributions; Voluntary Withdrawal. 

(a) A Participant may cease payroll deductions during an Offering Period and elect to withdraw from the Plan by delivering written notice of
such election to the Company in such form and at such time prior to the Exercise Date for such Offering Period as may be established by the Administrator (a “Withdrawal Election”). A Participant electing to withdraw from the Plan
may elect to either (i) withdraw all of the funds then credited to the Participant’s Plan Account as of the date on which the Withdrawal Election is received by the Company, in which case amounts credited to such Plan Account shall be
returned to the Participant in one (1) lump-sum payment in cash within thirty (30) days after such election is received by the Company, without any interest thereon, and the Participant shall cease to participate in the Plan and the
Participant’s Option for such Offering Period shall terminate; or (ii) exercise the Option for the maximum number of whole shares of Common Stock on the applicable Exercise Date with any remaining Plan Account balance returned to the
Participant in one (1) lump-sum payment in cash within thirty (30) days after such Exercise Date, without any interest thereon, and after such exercise cease to participate in the Plan. Upon receipt of a Withdrawal Election, the
Participant’s payroll deduction authorization and his or her Option to purchase under the Plan shall terminate. 

  
 9 

 (b) A participant’s withdrawal from the Plan 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 in succeeding Offering Periods which commence after the termination of the Offering Period from which the Participant withdraws. 

(c) A Participant who ceases contributions to the Plan during any Offering Period shall not be permitted to resume contributions to the Plan
during that Offering Period. 
 6.2 Termination of Eligibility. Upon a Participant’s ceasing to be an Eligible Employee, for any
reason, such Participant’s Option for the applicable Offering Period shall automatically terminate, he or she shall be deemed to have elected to withdraw from the Plan, and such Participant’s Plan Account shall be paid to such Participant
or, in the case of his or her death, to the person or persons entitled thereto pursuant to applicable law, within thirty (30) days after such cessation of being an Eligible Employee, without any interest thereon. 

ARTICLE VII. 
 GENERAL
PROVISIONS 
 7.1 Administration. 

(a) The Plan shall be administered by the Committee, which shall be composed of members of the Board. The Committee may delegate
administrative tasks under the Plan to the services of an Agent and/or Employees to assist in the administration of the Plan, including establishing and maintaining an individual securities account under the Plan for each Participant. 

(b) It shall be the duty of the Administrator to conduct the general administration of the Plan in accordance with the provisions of the Plan.
The Administrator shall have the power, subject to, and within the limitations of, the express provisions of the Plan: 
 (i)
To establish Offering Periods; 
 (ii) To determine when and how Options shall be granted and the provisions and terms of
each Offering Period (which need not be identical); 
 (iii) To select Designated Subsidiaries in accordance with
Section 7.2 hereof; and 
 (iv) To construe and interpret the Plan, the terms of any Offering Period and the terms of
the Options and to adopt such rules for the administration, interpretation, and application of the Plan as are consistent therewith and to interpret, amend or revoke any such rules. The Administrator, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan, any Offering Period or any Option, in a manner and to the extent it shall deem necessary or expedient to make the Plan fully effect, subject to Section 423 of the Code and the Treasury Regulations
thereunder. 

  
 10 

 (c) The Administrator may adopt rules or procedures relating to the operation and administration
of the Plan to accommodate the specific requirements of local laws and procedures. Without limiting the generality of the foregoing, the Administrator is specifically authorized to adopt rules and procedures regarding handling of participation
elections, payroll deductions, payment of interest, conversion of local currency, payroll tax, withholding procedures and handling of stock certificates which vary with local requirements. In its absolute discretion, the Board may at any time and
from time to time exercise any and all rights and duties of the Administrator under the Plan. 
 (d) The Administrator may adopt sub-plans
applicable to particular Designated Subsidiaries or locations, which sub-plans may be designed to be outside the scope of Section 423 of the Code. The rules of such sub-plans may take precedence over other provisions of this Plan, with the
exception of Section 5.1 hereof, but unless otherwise superseded by the terms of such sub-plan, the provisions of this Plan shall govern the operation of such sub-plan. 

(e) All expenses and liabilities incurred by the Administrator in connection with the administration of the Plan shall be borne by the
Company. The Administrator may, with the approval of the Committee, employ attorneys, consultants, accountants, appraisers, brokers or other persons. The Administrator, the Company and its officers and directors shall be entitled to rely upon the
advice, opinions or valuations of any such persons. All actions taken and all interpretations and determinations made by the Administrator in good faith shall be final and binding upon all Participants, the Company and all other interested persons.
No member of the Board or Administrator shall be personally liable for any action, determination or interpretation made in good faith with respect to the Plan or the options, and all members of the Board or Administrator shall be fully protected by
the Company in respect to any such action, determination, or interpretation. 
 7.2 Designation of Subsidiary Corporations. The Board
or Committee shall designate from among the Subsidiaries, as determined from time to time, the Subsidiary or Subsidiaries that shall constitute Designated Subsidiaries. The Board or Committee may designate a Subsidiary, or terminate the designation
of a Subsidiary, without the approval of the stockholders of the Company. 
 7.3 Reports. Individual accounts shall be maintained for
each Participant in the Plan. Statements of Plan Accounts shall be given to Participants at least annually, which statements shall set forth the amounts of payroll deductions, the Option Price, the number of shares purchased and the remaining cash
balance, if any. 
 7.4 No Right to Employment. Nothing in the Plan shall be construed to give any person (including any Participant)
the right to remain in the employ of the Company, a Parent or a Subsidiary or to affect the right of the Company, any Parent or any Subsidiary to terminate the employment of any person (including any Participant) at any time, with or without cause,
which right is expressly reserved. 

  
 11 

 7.5 Amendment and Termination of the Plan. 

(a) The Board may, in its sole discretion, amend, suspend or terminate the Plan at any time and from time to time; provided,
however, that without approval of the Company’s stockholders given within twelve (12) months before or after action by the Board, the Plan may not be amended to increase the maximum number of shares of Common Stock subject to the
Plan or change the designation or class of Eligible Employees; and provided, further that without approval of the Company’s stockholders, the Plan may not be amended 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. 
 (b) In the event the Administrator
determines that the ongoing operation of the Plan may result in unfavorable financial accounting consequences, the Administrator may, to the extent permitted under Section 423 of the Code, in its discretion and, to the extent necessary or
desirable, modify or amend the Plan to reduce or eliminate such accounting consequence including, but not limited to: 
 (i)
altering the Option Price for any Offering Period including an Offering Period underway at the time of the change in Option Price; 

(ii) shortening any Offering Period so that the Offering Period ends on a new Exercise Date, including an Offering Period
underway at the time of the Administrator action; and 
 (iii) allocating shares of Common Stock. 

Such modifications or amendments shall not require stockholder approval or the consent of any Participant. 

(c) Upon termination of the Plan, the balance in each Participant’s Plan Account shall be refunded as soon as practicable after such
termination, without any interest thereon. 
 7.6 Use of Funds; No Interest Paid. All funds received by the Company by reason of
purchase of Common Stock under the Plan shall be included in the general funds of the Company free of any trust or other restriction and may be used for any corporate purpose. No interest shall be paid to any Participant or credited under the Plan.

 7.7 Term; Approval by Stockholders. No Option may be granted during any period of suspension of the Plan or after termination of
the Plan. The Plan shall be submitted for the approval of the Company’s stockholders within twelve (12) months after the date of the Board’s initial adoption of the Plan. Options may be granted prior to such stockholder approval;
provided, however, that such Options shall not be exercisable prior to the time when the Plan is approved by the stockholders; provided, further that if such approval has not been obtained by the end of said twelve
(12)-month period, all Options previously granted under the Plan shall thereupon terminate and be canceled and become null and void without being exercised. 

  
 12 

 7.8 Effect Upon Other Plans. The adoption of the Plan shall not affect any other
compensation or incentive plans in effect for the Company, any Parent or any Subsidiary. Nothing in the Plan shall be construed to limit the right of the Company, any Parent or any Subsidiary (a) to establish any other forms of incentives or
compensation for Employees of the Company or any Parent or any Subsidiary, or (b) to grant or assume Options otherwise than under the Plan in connection with any proper corporate purpose, including, but not by way of limitation, the grant or
assumption of options in connection with the acquisition, by purchase, lease, merger, consolidation or otherwise, of the business, stock or assets of any corporation, firm or association. 

7.9 Conformity to Securities Laws. Notwithstanding any other provision of the Plan, the Plan and the participation in the Plan by any
individual who is then subject to Section 16 of the Exchange Act shall be subject to any additional limitations set forth in any applicable exemption rule under Section 16 of the Exchange Act (including any amendment to Rule 16b-3 of the Exchange Act) that are requirements for the application of such exemptive rule. To the extent permitted by applicable law, the Plan shall be deemed amended to the extent necessary to conform to such
applicable exemptive rule. 
 7.10 Notice of Disposition of Shares. Each Participant shall give the Company prompt notice of any
disposition or other transfer of any shares of Common Stock, acquired pursuant to the exercise of an Option, if such disposition or transfer is made (a) within two (2) years after the applicable Grant Date or (b) within one
(1) year after the transfer of such shares of Common Stock to such Participant upon exercise of such Option. The Company may direct that any certificates evidencing shares acquired pursuant to the Plan refer to such requirement. 

7.11 Tax Withholding. The Company or any Parent or any Subsidiary shall be entitled to require payment in cash or deduction from other
compensation payable to each Participant of any sums required by federal, state or local tax law to be withheld with respect to any purchase of shares of Common Stock under the Plan or any sale of such shares. 

7.12 Governing Law. The Plan and all rights and obligations thereunder shall be construed and enforced in accordance with the laws of
the State of Delaware. 
 7.13 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. 

7.14 Conditions To Issuance of Shares. 

(a) Notwithstanding anything herein to the contrary, the Company shall not be required to issue or deliver any certificates or make any book
entries evidencing shares of Common Stock pursuant to the exercise of an Option by a Participant, unless and until the Board or the Committee has determined, with advice of counsel, that the issuance of such shares of Common Stock is in compliance
with all applicable laws, regulations of governmental authorities and, if applicable, the requirements of any securities exchange or automated quotation system on which the shares of Common Stock are listed or traded, and the shares of Common

  
 13 

 
Stock are covered by an effective registration statement or applicable exemption from registration. In addition to the terms and conditions provided herein, the Board or the Committee may require
that a Participant make such reasonable covenants, agreements, and representations as the Board or the Committee, in its discretion, deems advisable in order to comply with any such laws, regulations, or requirements. 

(b) All certificates for shares of Common Stock delivered pursuant to the Plan and all shares of Common Stock issued pursuant to book entry
procedures are subject to any stop-transfer orders and other restrictions as the Committee deems necessary or advisable to comply with federal, state, or foreign securities or other laws, rules and regulations and the rules of any securities
exchange or automated quotation system on which the shares of Common Stock are listed, quoted, or traded. The Committee may place legends on any certificate or book entry evidencing shares of Common Stock to reference restrictions applicable to the
shares of Common Stock. 
 (c) The Committee shall have the right to require any Participant to comply with any timing or other restrictions
with respect to the settlement, distribution or exercise of any Option, including a window-period limitation, as may be imposed in the sole discretion of the Committee. 

(d) Notwithstanding any other provision of the Plan, unless otherwise determined by the Committee or required by any applicable law, rule or
regulation, the Company may, in lieu of delivering to any Participant certificates evidencing shares of Common Stock issued in connection with any Option, record the issuance of shares of Common Stock in the books of the Company (or, as applicable,
its transfer agent or stock plan administrator). 
 7.15 Equal Rights and Privileges. Except with respect to sub-plans designed to be
outside the scope of Section 423 of the Code, all Eligible Employees of the Company (or of any Designated Subsidiary) shall have equal rights and privileges under this Plan to the extent required under Section 423 of the Code or the
regulations promulgated thereunder so that this Plan qualifies as an “employee stock purchase plan” within the meaning of Section 423 of the Code or the Treasury Regulations thereunder. Any provision of this Plan that is inconsistent
with Section 423 of the Code or the Treasury Regulations thereunder shall, without further act or amendment by the Company or the Board, be reformed to comply with the equal rights and privileges requirement of Section 423 of the Code or
the Treasury Regulations thereunder. 
 * * * * * * 

  
 14 

 I hereby certify that the foregoing Ardelyx, Inc. Employee Stock Purchase Plan was duly approved
by the Board of Directors of Ardelyx, Inc. on May 23, 2014. 
 I hereby certify that the foregoing Ardelyx, Inc. Employee Stock Purchase
Plan was duly approved by the stockholders of Ardelyx, Inc. on [                    ], 2014. 

Executed on this      day of
                    , 2014. 
  

	
	   

	[Name, Title]

  
 15

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00232-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00232-of-00352.parquet"}]]