Document:

2006 Equity Incentive Plan, amended form of Director Stock Option Agreement

 EXHIBIT 10.15 
 Grant No.                      
 VERISIGN, INC. 
 2006 EQUITY INCENTIVE PLAN 
 DIRECTORS NONQUALIFIED STOCK OPTION GRANT 
 This Stock Option Agreement (this “Agreement”) is made and entered into as of the Date of Grant set forth below (the “Date of Grant”) by and between VeriSign, Inc., a Delaware corporation (the
“Company”), and the Optionee named below (“Optionee”). Capitalized terms not defined herein shall have the meaning ascribed to them in the Company’s 2006 Equity Incentive Plan (the
“Plan”). 
  

			
	 Optionee:
	    	_______________________________________
		
	 Optionee’s Address:
	    	_______________________________________
		
	 Total Option Shares:
	    	_______________________________________
		
	 Exercise Price per Share:
	    	_______________________________________
		
	 Date of Grant:
	    	_______________________________________
		
	 Expiration Date:
	    	_______________________________________
		    	(unless earlier terminated under Section 3 hereof)

 1. Grant of Option. The Company hereby grants to Optionee a nonqualified
stock option (this “Option”) to purchase up to the total number of shares of Common Stock of the Company set forth above as Total Option Shares (collectively, the “Shares”) at the Exercise Price Per
Share set forth above (the “Exercise Price”), subject to all of the terms and conditions of this Agreement and the Plan. 
 2. Vesting; Expiration Date. 
 2.1 Vesting of Shares. This Option shall be exercisable as it vests. Subject to
the terms and conditions of the Plan and this Agreement, this Option shall vest and become exercisable as to portions of the Shares as follows: (a) this Option shall not be exercisable with respect to any of the Shares until the first
anniversary of the Date of Grant set forth above; (b) provided that Optionee has continuously been a member of the Board since the Date of Grant, this Option shall become exercisable as to 25% of the Shares on the first annual anniversary of
the Date of Grant; and (c) provided that Optionee has continuously been a member of the Board since the Date of Grant, this Option shall become exercisable as to an additional 6.25% of the Shares on each quarterly anniversary after the Date of
Grant. This Option shall cease to vest upon Optionee no longer being a member of the Board. 

 VeriSign, Inc. 
 Directors Nonqualified Stock Option Agreement 
 2006 Equity Incentive Plan 
 2.2 Expiration. This Option shall expire on the Expiration Date set forth above and must be exercised, if at all, on or before the earlier of the
Expiration Date or the date on which this Option is earlier terminated in accordance with the provisions of Section 3 hereof. 
 3.
Termination of Option. 
 3.1 Termination for Any Reason Except Death, Disability. If Optionee
ceases to be a member of the Board for any reason except Optionee’s death or Disability then this Option, to the extent (and only to the extent) that it is vested in accordance with the schedule set forth in Section 2.1 hereof on the
termination date, may be exercised by Optionee no later than three (3) months after the termination date, but in any event no later than the Expiration Date. 
 3.2 Termination Because of Death or Disability. If Optionee ceases to be a member of the Board because of death or Disability of Optionee (or the Optionee dies within three
(3) months after ceasing to be a member of the Board), then this Option, to the extent that it is vested in accordance with the schedule set forth in Section 2.1 hereof on the termination date, may be exercised by Optionee (or
Optionee’s legal representative or authorized assignee) no later than twelve (12) months after the termination date, but in any event no later than the Expiration Date. 
 4. Manner of Exercise. 
 4.1 Stock Option Exercise Agreement. To exercise this Option, Optionee (or in the case of exercise after Optionee’s death, Optionee’s executor, administrator, heir or legatee, as the case may be) must deliver
to the Company an executed stock option exercise agreement in the form attached hereto as Exhibit A, or in such other form as may be approved by the Company from time to time (the “Exercise Agreement”), which
shall set forth, inter alia, Optionee’s election to exercise this Option, the number of shares being purchased, any restrictions imposed on the Shares and any representations, warranties and agreements regarding Optionee’s
investment intent and access to information as may be required by the Company to comply with applicable securities laws. If someone other than Optionee exercises this Option, then such person must submit the Exercise Agreement and documentation
reasonably acceptable to the Company that such person has the right to exercise this Option. 
 4.2 Limitations on Exercise.
This Option may not be exercised unless such exercise is in compliance with all applicable federal and state securities laws, as they are in effect on the date of exercise. 
 4.3 Payment. The Exercise Agreement shall be accompanied by full payment of the Exercise Price for the Shares being purchased in cash (by check),
or where permitted by law: 
 (a) by cancellation of indebtedness of the Company to the Optionee; 
  

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 VeriSign, Inc. 
 Directors Nonqualified Stock Option Agreement 
 2006 Equity Incentive Plan 
 (b) by surrender of shares of the Company’s Common Stock that either: (1) have been paid for within the meaning of SEC Rule 144 (and, if
such shares were purchased from the Company by use of a promissory note, such note has been fully paid with respect to such shares); or (2) were obtained by Optionee in the open public market; and in either event are clear of all liens, claims,
encumbrances or security interests; 
 (c) by waiver of compensation due or accrued to Optionee for services rendered to the Company;

 (d) provided that a public market for the Company’s Common Stock exists: (1) through a “same day sale” commitment
from Optionee and a broker-dealer that is a member of the National Association of Securities Dealers (an “NASD Dealer”) whereby Optionee irrevocably elects to exercise this Option and to sell a portion of the Shares so
purchased to pay for the Exercise Price and whereby the NASD Dealer irrevocably commits upon receipt of such Shares to forward the exercise price directly to the Company; or (2) through a “margin” commitment from Optionee and
an NASD Dealer whereby Optionee irrevocably elects to exercise this Option and to pledge the Shares so purchased to the NASD Dealer in a margin account as security for a loan from the NASD Dealer in the amount of the Exercise Price, and whereby the
NASD Dealer irrevocably commits upon receipt of such Shares to forward the Exercise Price directly to the Company; or 
 (e) by any
combination of the foregoing. 
 4.4 Tax Withholding. Prior to the issuance of the Shares upon exercise of this Option, Optionee
must pay or provide for any applicable federal or state withholding obligations of the Company. 
 4.5 Issuance of Shares.
Provided that the Exercise Agreement and payment are in form and substance satisfactory to counsel for the Company, the Company shall issue the Shares registered in the name of Optionee, Optionee’s authorized assignee, or Optionee’s legal
representative, and shall deliver certificates representing the Shares with the appropriate legends affixed thereto. To enforce any restrictions on Optionee’s Shares, the Committee may require Optionee to deposit all certificates, together with
stock powers or other instruments of transfer approved by the Committee appropriately endorsed in blank, with the Company or an agent designated by the Company to hold in escrow until such restrictions have lapsed or terminated, and the Committee
may cause a legend or legends referencing such restrictions to be placed on the certificates. 
 5.
Compliance with Laws and Regulations. The exercise of this Option and the issuance and transfer of Shares shall be subject to compliance by the Company and Optionee with all applicable requirements of federal and state
securities laws and with all applicable requirements of any stock exchange on which the Company’s Common Stock may be listed at the time of such exercise, issuance or transfer. Optionee understands that the Company is under no obligation to
register or qualify the Shares with the SEC, any state securities commission or any stock exchange to effect such compliance. 
  

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 VeriSign, Inc. 
 Directors Nonqualified Stock Option Agreement 
 2006 Equity Incentive Plan 
 6. Nontransferability of Option. This Option may not be transferred in any manner other than under the terms and conditions of
the Plan or by will or by the laws of descent and distribution and may be exercised during the lifetime of Optionee only by Optionee. The terms of this Option shall be binding upon the executors, administrators, successors and assigns of Optionee.

 7. Tax Consequences. Set forth below is a brief summary as of the date the Board adopted the Plan of some of the
federal tax consequences of exercise of this Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. THE COMPANY RECOMMENDS THAT OPTIONEE CONSULT A TAX ADVISOR BEFORE
EXERCISING THIS OPTION OR DISPOSING OF THE SHARES. 
 7.1 Exercise of Nonqualified Stock Option. There may be a
regular federal income tax liability upon the exercise of this Option. Optionee will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the fair market value of the Shares on the
date of exercise over the Exercise Price. The Company may be required to withhold from Optionee’s compensation or collect from Optionee and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income at
the time of exercise. 
 7.2 Disposition of Shares. If the Shares are held for more than twelve (12) months after the
date of the transfer of the Shares pursuant to the exercise of an NQSO, any gain realized on disposition of the Shares will be treated as long-term capital gain. The Company may be required to withhold from Optionee’s compensation or collect
from the Optionee and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income. 
 8.
Privileges of Stock Ownership. Optionee shall not have any of the rights of a stockholder with respect to any Shares until the Shares are issued to Optionee. 
 9. Interpretation. Any dispute regarding the interpretation of this Agreement shall be submitted by Optionee or the Company to the
Committee for review. The resolution of such a dispute by the Committee shall be final and binding on the Company and Optionee. 
 10.
Entire Agreement. The Plan is incorporated herein by reference. This Agreement and the Plan and the Exercise Agreement constitute the entire agreement and understanding of the parties hereto with respect to the subject matter hereof
and supersede all prior understandings and agreements with respect to such subject matter. 
 11. Notices. Any notice required
to be given or delivered to the Company under the terms of this Agreement shall be in writing and addressed to the Corporate Secretary of the Company at its principal corporate offices. Any notice required to be given or delivered to Optionee shall
be in writing and addressed to Optionee at the address indicated above or to such other address as such party may designate in writing from time to time to the Company. All 

  

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VeriSign, Inc. 
 Directors Nonqualified Stock
Option Agreement 
 2006 Equity Incentive Plan 
 notices shall be deemed to have been given or delivered upon: personal delivery; three (3) days after deposit in the United States mail by certified or registered mail (return receipt requested); one (1) business day after deposit
with any return receipt express courier (prepaid); or one (1) business day after transmission by facsimile. 
 12.
Successors and Assigns. The Company may assign any of its rights under this Agreement. This Agreement shall be binding upon and inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on
transfer set forth herein, this Agreement shall be binding upon Optionee and Optionee’s heirs, executors, administrators, legal representatives, successors and assigns. 
 13. Governing Law. This Agreement shall be governed by and construed in accordance with the internal laws of the State of California,
without regard to that body of law pertaining to choice of law or conflict of law. 
 14. Acceptance. Optionee hereby
acknowledges receipt of a copy of the Plan and this Agreement. Optionee has read and understands the terms and provisions thereof, and accepts this Option subject to all the terms and conditions of the Plan and this Agreement. Optionee acknowledges
that there may be adverse tax consequences upon exercise of this Option or disposition of the Shares and that the Company has advised Optionee to consult a tax advisor prior to such exercise or disposition. 
 [REMAINDER OF PAGE INTENTIONALLY BLANK, SIGNATURE PAGE FOLLOWS] 
  

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 VeriSign, Inc. 
 Directors Nonqualified Stock Option Agreement 
 2006 Equity Incentive Plan 
 IN WITNESS WHEREOF, the Company has caused this Agreement to be executed in duplicate by its duly authorized representative and Optionee has
executed this Agreement in duplicate as of the Date of Grant. 
  

							
	 VERISIGN, INC.
	 		 	OPTIONEE
				
	 By:
	 	  
	 		 	  

		 		 		 	(Signature)
			
	  
	 		 	  

	 (Please print name)
	 		 	(Please print name)
			
	  
	 		 	
	 (Please print title)
	 		 	

  

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 EXHIBIT A 
 STOCK OPTION EXERCISE AGREEMENT 
 Stock Option Exercise Agreement for Directors 
 

 
  

					
	Optionee Name	 	Address	 	Social Security Number
		 		 	

 OPTIONS EXERCISED 
  

													
	Plan	 	Grant #	 	Grant Date	 	 Grant Price
 Per Share (1)
	 	 # of Shares
 Exercised (2)
	 	 Total Option
Price (3)
 (1) x (2) = (3)
	 	PAYMENT
METHOD AND
ISSUANCE
INSTRUCTIONS
		 		 		 		 		 		 
		 		 		 		 		 		 	
		 		 		 		 		 		 	
		 		 		 		 		 		 	
		 		 		 		 	 	 	 	 	
		 		 		 	TOTAL	 		 		 	
		 		 		 		 	 	 	 	 	

  

											
	 ̈	 	Cash Exercise	  	 ̈	  	Cashless Exercise
			
	Attached is my check #                      in the amount of $
                     to pay for the exercise of my stock options as listed above. Issue the certificate in my name and send it to:	  	  ̈
	  	 Stock Swap             # of Shares:
                    
             Cash Due (if applicable): $
                    

		 		  	 ̈	  	My home address above, or;	  		  	
		 		  	 ̈	  	E*Trade Account – Account #                     	  		  	

 REPRESENTATIONS 
  

			
	  
	  	I do NOT have access to, nor am I aware of, any inside information regarding VeriSign, Inc. which could or has influenced my decision to purchase and/or sell this stock.
	Initials	  	

 I hereby agree to hold harmless VeriSign, Inc. regarding the reporting of income subject to the transfer/sale of
these shares. I am not relying on VeriSign or E*Trade for any tax advice. The undersigned holder of the stock option(s) described above irrevocably exercises such option(s) as set forth and herewith makes payment therefore, all at the price and on
the terms and conditions specified in the stock option agreement(s) pertaining to the option(s) exercised. 
 IMPORTANT NOTE: FOR CASH EXERCISES 

Send your form and attach your check (Payable to: VeriSign, Inc.) to VeriSign, Inc. Attn: Linda Hart, 487 E. Middlefield Rd; Mountain View, CA 94043. 
  

							
	  
	  	  

	Optionee Signature Date	  	
				
	FOR COMPANY USE ONLY	  	Insider List Verified:	  	  
	  	  

		  	                  Stock Administrator Date2007 Employee Stock Purchase Plan, as adopted August 30, 2007

 EXHIBIT 10.19 
 

 
 VERISIGN, INC. 
 2007 EMPLOYEE STOCK PURCHASE PLAN 
 As Adopted August 30, 2007 

 VERISIGN, INC. 
 2007 EMPLOYEE STOCK PURCHASE PLAN 
 As Adopted August 30, 2007 
 1. Establishment of Plan. VeriSign, Inc. (the “Company”) proposes to grant options for purchase of the Company’s
Common Stock to eligible employees of the Company and its Participating Subsidiaries (as hereinafter defined) pursuant to this Employee Stock Purchase Plan (this “Plan”). For purposes of this Plan, “Parent
Corporation” and “Subsidiary” (collectively, “Participating Subsidiaries”) shall have the same meanings as “parent corporation” and “subsidiary corporation” in Sections
424(e) and 424(f), respectively, of the Internal Revenue Code of 1986, as amended (the “Code”). “Participating Subsidiaries” are Parent Corporations or Subsidiaries that the Board of Directors of the
Company (the “Board”) designates from time to time as corporations that shall participate in this Plan. The Company intends this Plan to qualify as an “employee stock purchase plan” under Section 423 of the
Code (including any amendments to or replacements of such Section), and this Plan shall be so construed. Any term not expressly defined in this Plan but defined for purposes of Section 423 of the Code shall have the same definition herein. A
total of [6,000,000] shares of the Company’s Common Stock is reserved for issuance under this Plan. Such number shall be subject to adjustments effected in accordance with Section 14 of this Plan. 
 2. Purpose. The purpose of this Plan is to provide eligible employees of the Company and Participating Subsidiaries with a convenient means of
acquiring an equity interest in the Company through payroll deductions, to enhance such employees’ sense of participation in the affairs of the Company and Participating Subsidiaries, and to provide an incentive for continued employment.

 3. Administration. This Plan shall be administered by the Compensation Committee of the Board (the
“Committee”). Subject to the provisions of this Plan and the limitations of Section 423 of the Code or any successor provision in the Code, all questions of interpretation or application of this Plan shall be determined
by the Committee and its decisions shall be final and binding upon all participants. Members of the Committee shall receive no compensation for their services in connection with the administration of this Plan, other than standard fees as
established from time to time by the Board for services rendered by Board members serving on Board committees. All expenses incurred in connection with the administration of this Plan shall be paid by the Company. 
 4. Eligibility. Any employee of the Company or the Participating Subsidiaries is eligible to participate in an Offering Period (as hereinafter
defined) under this Plan except the following: 
 (a) employees who are not employed by the Company or Participating Subsidiaries ten
(10) days before the beginning of such Offering Period; 
 (b) employees who are customarily employed for twenty (20) hours or less
per week; 
 (c) employees who, together with any other person whose stock would be attributed to such employee pursuant to
Section 424(d) of the Code, own stock or hold options to purchase stock possessing five percent (5%) or more of the total combined voting power or value of all classes of stock of the Company or any of its Participating Subsidiaries or
who, as a result of being granted an option under this Plan with respect to such Offering Period, would own stock or hold options to purchase stock possessing five percent (5%) or more of the total combined voting power or value of all classes
of stock of the Company or any of its Participating Subsidiaries; and 
 (d) individuals who provide services to the Company or any of its
Participating Subsidiaries as independent contractors who are reclassified as common law employees for any reason except for federal income and employment tax purposes. 
 5. Offering Periods. The offering periods of this Plan (each, an “Offering Period”) shall be of twenty-four
(24) months duration commencing on February 1 and August 1 of each year and ending on January 31 and July 31 of each year; provided, however, that the first such Offering Period shall commence on August 1, 2007
(the “First Offering Date”) and shall end on July 31, 2009. Each Offering Period shall consist of four (4) six-month purchase periods (individually, a “Purchase Period”) during which payroll
deductions of the participants are accumulated under this Plan. Unless determined otherwise by the Committee with respect to a particular Offering Period, each Purchase Period shall run from February 1 or August 1 to the next succeeding
July 31 or January 31 as the case may 

  

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be. If the Committee determines that purchases shall not be made on a Purchase Date, then the Committee may, but need not, modify the length of subsequent
Purchase Periods and/or add additional Purchase Periods as it may determine in its discretion. The first business day of each Offering Period is referred to as the “Offering Date”. The last business day of each Purchase
Period is referred to as the “Purchase Date”. The Committee shall have the power to change the duration of Offering Periods or Purchase Periods as it may deem necessary or desirable in its sole discretion. 
 6. Participation in this Plan. Eligible employees may become participants in an Offering Period under this Plan on the first Offering Date after
satisfying the eligibility requirements by delivering a subscription agreement in the form specified by the Company not later than such Offering Date unless a later time for filing the subscription agreement authorizing payroll deductions is set by
the Committee for all eligible employees with respect to a given Offering Period. An eligible employee who does not deliver a subscription agreement by such date after becoming eligible to participate in such Offering Period shall not participate in
that Offering Period and shall only be permitted to participate in any subsequent Offering Period by delivering such a subscription agreement not later than the Offering Date of such subsequent Offering Period. Notwithstanding the foregoing,
participants in any offering period under the Company’s 1998 Employee Stock Purchase Plan (the “1998 Plan”) shall, on termination of such offering period under the 1998 Plan (including for this purpose, a termination due
to the operation of Section 11(c) of the 1998 Plan), automatically be enrolled in the first Offering Period to commence thereafter at the same contribution levels as respectively last elected under the 1998 Plan. Once an employee becomes a
participant in an Offering Period, such employee will automatically participate in the Offering Period commencing immediately following the last day of the prior Offering Period unless the employee withdraws or is deemed to withdraw from this Plan
or terminates further participation in the Offering Period as set forth in Section 11 below. Such participant is not required to file any additional subscription agreement in order to continue participation in this Plan. 
 7. Grant of Option on Enrollment. Enrollment by an eligible employee in this Plan with respect to an Offering Period will constitute the grant (as
of the Offering Date) by the Company to such employee of an option to purchase on the Purchase Date up to that number of shares of Common Stock of the Company determined by dividing (a) the amount accumulated in such employee’s payroll
deduction account during such Purchase Period by (b) the lower of (i) eighty-five percent (85%) of the fair market value of a share of the Company’s Common Stock on the Offering Date (but in no event less than the par value of a
share of the Company’s Common Stock), or (ii) eighty-five percent (85%) of the fair market value of a share of the Company’s Common Stock on the Purchase Date (but in no event less than the par value of a share of the
Company’s Common Stock), provided, however, that the number of shares of the Company’s Common Stock subject to any option granted pursuant to this Plan shall not exceed the lesser of (a) the maximum number of shares set by the
Committee pursuant to Section 10(c) below with respect to the applicable Purchase Date, or (b) the maximum number of shares which may be purchased pursuant to Section 10(b) below with respect to the applicable Purchase Date. The fair
market value of a share of the Company’s Common Stock shall be determined as provided in Section 8 hereof. 
 8. Purchase
Price. The purchase price per share at which a share of Common Stock will be sold in any Offering Period shall be eighty-five percent (85%) of the lesser of: 
 (a) The Fair Market Value on the Offering Date; or 
 (b) The Fair Market Value on the Purchase Date. 

 For purposes of this Plan, the term “Fair Market Value” means, as of any date, the value of a share of the Company’s Common
Stock determined as follows: 
 (i) if such Common Stock is publicly traded and is then listed on a national securities
exchange (for example, the Nasdaq Global Market), its closing price on the date of determination on the principal national securities exchange on which the Common Stock is listed or admitted to trading as reported in The Wall Street Journal;

 (ii) if such Common Stock is publicly traded but is not listed or admitted to trading on a national securities exchange,
the average of the closing bid and asked prices on the date of determination as reported in The Wall Street Journal; or 
 (iii) if none of the foregoing is applicable, by the Board in good faith. 
  

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 9. Payment Of Purchase Price; Changes In Payroll Deductions; Issuance Of Shares. 
 (a) The purchase price of the shares may be accumulated by regular payroll deductions made during each Offering Period or, when authorized by the
Committee, the purchase price of the shares may be paid by a lump sum payment. The deductions are made as a percentage of the participant’s compensation in one percent (1%) increments not less than two percent (2%) nor greater than
twenty-five percent (25%) or such higher or lower limit set by the Committee. Compensation shall mean base salary, commissions, bonuses, incentive compensation and shift premiums; provided, however, that for purposes of determining a
participant’s compensation, any election by such participant to reduce his or her regular cash remuneration under Sections 125 or 401(k) of the Code shall be treated as if the participant did not make such election. Payroll deductions shall
commence on the first payday of the Offering Period and shall continue to the end of the Offering Period unless sooner altered or terminated as provided in this Plan. 
 (b) A participant may decrease or increase the rate of payroll deductions during an Offering Period by delivering a new authorization for payroll deductions, in the form specified by the Company, in which case the new
rate shall become effective for the next payroll period commencing more than fifteen (15) days after the Company’s receipt of the authorization and shall continue for the remainder of the Offering Period unless changed as described below.
Such change in the rate of payroll deductions may be made at any time during an Offering Period, but not more than two (2) changes may be made effective during any Purchase Period. A participant may increase or decrease the rate of payroll
deductions for any subsequent Offering Period by delivering a new authorization, in the form specified by the Company, for payroll deductions not later than fifteen (15) days before the beginning of such Offering Period. 
 (c) All payroll deductions made for a participant are credited to his or her account under this Plan and are deposited with the general funds of the
Company. No interest accrues on the payroll deductions. All payroll deductions received or held by the Company may be used by the Company for any corporate purpose, and the Company shall not be obligated to segregate such payroll deductions.

 (d) On each Purchase Date of an Offering Period, so long as this Plan remains in effect, and provided that the participant has not
withdrawn from that Offering Period, then unless the Committee has previously notified participants that no purchase of Common Stock shall occur on such Purchase Date, the Company shall apply the funds then in the participant’s account to the
purchase of whole shares of Common Stock reserved under the option granted to such participant with respect to the Offering Period to the extent that such option is exercisable on the Purchase Date. The purchase price per share shall be as specified
in Section 8 of this Plan. Any cash remaining in a participant’s account after such purchase of shares shall be refunded to such participant in cash, without interest; provided, however that any amount remaining in such participant’s
account on a Purchase Date which is less than the amount necessary to purchase a full share of Common Stock of the Company shall be carried forward, without interest, into the next Purchase Period or Offering Period, as the case may be. In the event
that this Plan has been oversubscribed, all funds not used to purchase shares on the Purchase Date shall be returned to the participant, without interest. No Common Stock shall be purchased on a Purchase Date on behalf of any employee whose
participation in this Plan has terminated prior to such Purchase Date. 
 (e) As promptly as practicable after the Purchase Date, the Company
shall issue shares for the participant’s benefit representing the shares purchased upon exercise of his or her option. 
 (f) During a
participant’s lifetime, such participant’s option to purchase shares hereunder is exercisable only by him or her. The participant will have no interest or voting right in shares covered by his or her option until such option has been
exercised. 
 10. Limitations on Shares to be Purchased. 
 (a) No participant shall be entitled to accrue the right to purchase stock under this Plan at a rate which, when aggregated with his or her rights to purchase stock under all other employee stock purchase plans of the
Company or any Subsidiary, exceeds $25,000 in fair market value, determined as of the Offering Date (or such other limit as may be imposed by the Code) for each calendar year in which the employee participates in this Plan. The Company shall
automatically suspend the payroll deductions of any participant as necessary to enforce such limit provided that when the Company automatically resumes such payroll deductions, the Company must apply the rate in effect immediately prior to such
suspension. 
  

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 (b) If the Fair Market Value of a share on a Purchase Date is less than half of eighty-five percent
(85%) of the Fair Market Value of a share on the Offering Date then the maximum number of shares that may be purchased by any employee on such Purchase Date shall not exceed the number (the “Maximum Share Amount”)
obtained by dividing eighty-five percent (85%) of the Fair Market Value of a share on the Offering Date into fifty percent (50%) of such participant’s eligible compensation to be paid during the Offering Period (as determined on the
Offering Date). Prior to the commencement of any Offering Period, the Committee may, in its sole discretion, set a new maximum number of shares which may be purchased by any employee at any single Purchase Date and such number shall be the Maximum
Share Amount for all Offering Periods to which it is to apply. 
 (c) No participant shall be entitled to purchase shares on a Purchase Date
if the Committee determines there shall be no purchase of shares on such Purchase Date (whether due to the requirements of Section 23 of the Plan or as the Committee may otherwise deem necessary or desirable). If the Committee makes such a
determination, then contributions accumulated during the Purchase Period ending on such Purchase Date shall be refunded (without interest unless otherwise determined by the Committee) to participants, but such participants, notwithstanding the
provisions of Section 11(b), shall continue to be participants in the Offering Period of which such Purchase Period is a part unless the automatic enrollment provisions of Section 11(c) are otherwise applicable. 
 (d) If the number of shares to be purchased on a Purchase Date by all employees participating in this Plan exceeds the number of shares then available
for issuance under this Plan, then the Company will make a pro rata allocation of the remaining shares in as uniform a manner as shall be reasonably practicable and as the Committee shall determine to be equitable. In such event, the Company shall
give written notice of such reduction of the number of shares to be purchased under a participant’s option to each participant affected thereby. 
 (e) Any payroll deductions accumulated in a participant’s account which are not used to purchase stock due to the limitations in this Section 10 shall be returned to the participant as soon as practicable
after the end of the applicable Purchase Period, without interest unless otherwise determined by the Committee. 
 11. Withdrawal. 

 (a) Each participant may withdraw from an Offering Period under this Plan by signing and delivering a written notice to that effect on a
form specified by the Company. Such withdrawal may be elected at any time at least fifteen (15) days prior to the end of an Offering Period. 
 (b) Upon withdrawal from this Plan, the accumulated payroll deductions shall be returned to the withdrawn participant, without interest, and his or her interest in this Plan shall terminate. In the event a participant voluntarily elects to
withdraw from this Plan, he or she may not resume his or her participation in this Plan during the same Offering Period, but he or she may participate in any Offering Period under this Plan which commences on a date subsequent to such withdrawal by
filing a new authorization for payroll deductions in the same manner as set forth above for initial participation in this Plan. 
 (c) If the
purchase price on the first day of any current Offering Period in which a participant is enrolled is higher than the purchase price on the first day of any subsequent Offering Period, the Company will automatically enroll such participant in the
subsequent Offering Period. Except with respect to the first Offering Period, any funds accumulated in a participant’s account prior to the first day of such subsequent Offering Period will be applied to the purchase of shares on the Purchase
Date immediately prior to the first day of such subsequent Offering Period. With respect to the first Offering Period, any funds accumulated in a participant’s account prior to the first day of such subsequent Offering Period will be applied to
the purchase of shares on the Purchase Date next following the first day of such subsequent Offering Period. A participant does not need to file any forms with the Company to automatically be enrolled in the subsequent Offering Period 
 12. Termination of Employment. Termination of a participant’s employment for any reason, including retirement, death or the failure of a
participant to remain an eligible employee of the Company or of a Participating Subsidiary, immediately terminates his or her participation in this Plan. In such event, the payroll deductions credited to the participant’s account will be
returned to him or her or, in the case of his or her death, to his or her legal representative, without interest. For purposes of this Section 12, an employee will not be deemed to have 

  

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terminated employment or failed to remain in the continuous employ of the Company or of a Participating Subsidiary in the case of sick leave, military leave,
or any other leave of absence approved by the Board; provided that such leave is for a period of not more than ninety (90) days or reemployment upon the expiration of such leave is guaranteed by contract or statute. 
 13. Return of Payroll Deductions. In the event a participant’s interest in this Plan is terminated by withdrawal, termination of employment
or otherwise, or in the event this Plan is terminated by the Board, the Company shall promptly deliver to the participant all payroll deductions credited to such participant’s account. No interest shall accrue on the payroll deductions of a
participant in this Plan. 
 14. Capital Changes. 
 (a) Subject to any required action by the stockholders of the Company, the number of shares of Common Stock covered by each option under this Plan which has not yet been exercised and the number of shares of Common
Stock which have been authorized for issuance under this Plan but have not yet been placed under option (collectively, the “Reserves”), as well as the price per share of Common Stock covered by each option under this Plan
which has not yet been exercised, shall be proportionately adjusted for any increase or decrease in the number of issued and outstanding shares of Common Stock of the Company resulting from a stock split or the payment of a stock dividend (but only
on the Common Stock) or any other increase or decrease in the number of issued and outstanding shares of Common Stock effected without receipt of any 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 Committee, whose determination shall be final, binding and conclusive. Except as expressly
provided herein, no issue 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) In the event of the proposed dissolution or liquidation of the Company, the Offering Period will
terminate immediately prior to the consummation of such proposed action, unless otherwise provided by the Committee. The Committee may, in the exercise of its sole discretion in such instances, declare that this Plan shall terminate as of a date
fixed by the Committee and give each participant the right to purchase shares under this Plan prior to such termination. In the event of (i) a merger or consolidation in which the Company is not the surviving corporation (other than a merger or
consolidation with a wholly-owned subsidiary, a reincorporation of the Company in a different jurisdiction, or other transaction in which there is no substantial change in the stockholders of the Company or their relative stock holdings and the
options under this Plan are assumed, converted or replaced by the successor corporation, which assumption will be binding on all participants), (ii) a merger in which the Company is the surviving corporation but after which the stockholders of
the Company immediately prior to such merger (other than any stockholder that merges, or which owns or controls another corporation that merges, with the Company in such merger) cease to own their shares or other equity interest in the Company,
(iii) the sale of substantially all of the assets of the Company or (iv) the acquisition, sale, or transfer of more than 50% of the outstanding shares of the Company by tender offer or similar transaction, the Plan shall continue for all
Offering Periods which began prior to the transaction and shares will be purchased based on the fair market value of the surviving corporation’s stock on each Purchase Date (taking into account the exchange ratio, where necessary). 

(c) The Committee may, if it so determines in the exercise of its sole discretion, also make provision for adjusting the Reserves, as well as the
price per share of Common Stock covered by each outstanding option, in the event that the Company effects one or more reorganizations, recapitalizations, rights offerings or other increases or reductions of shares of its outstanding Common Stock, or
in the event of the Company being consolidated with or merged into any other corporation. 
 15. Nonassignability. Neither payroll
deductions credited to a participant’s account nor any rights with regard to the exercise of an option or to receive shares under this Plan may be assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the laws
of descent and distribution or as provided in Section 22 hereof) by the participant. Any such attempt at assignment, transfer, pledge or other disposition shall be void and without effect. 
 16. Reports. Individual accounts will be maintained for each participant in this Plan. Each participant shall receive promptly after the end of
each Purchase Period a report of his or her account setting forth the total payroll deductions accumulated, the number of shares purchased, the per share price thereof and the remaining cash balance, if any, carried forward to the next Purchase
Period or Offering Period, as the case may be. 
  

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 17. Notice of Disposition. Each participant shall notify the Company if the participant disposes
of any of the shares purchased in any Offering Period pursuant to this Plan if such disposition occurs within two (2) years from the Offering Date or within one (1) year from the Purchase Date on which such shares were purchased (the
“Notice Period”). Unless such participant is disposing of any of such shares during the Notice Period, such participant shall keep the certificates representing such shares in his or her name (and not in the name of a
nominee) during the Notice Period. The Company may, at any time during the Notice Period, place a legend or legends on any certificate representing shares acquired pursuant to this Plan requesting the Company’s transfer agent to notify the
Company of any transfer of the shares. The obligation of the participant to provide such notice shall continue notwithstanding the placement of any such legend on the certificates. 
 18. No Rights to Continued Employment. Neither this Plan nor the grant of any option hereunder shall confer any right on any employee to remain in
the employ of the Company or any Participating Subsidiary, or restrict the right of the Company or any Participating Subsidiary to terminate such employee’s employment. 
 19. Equal Rights And Privileges. All eligible employees shall have equal rights and privileges with respect to this Plan so that this Plan
qualifies as an “employee stock purchase plan” within the meaning of Section 423 or any successor provision of the Code and the related regulations. Any provision of this Plan which is inconsistent with Section 423 or any
successor provision of the Code shall, without further act or amendment by the Company, the Committee or the Board, be reformed to comply with the requirements of Section 423. This Section 19 shall take precedence over all other provisions
in this Plan. 
 20. Notices. All notices or other communications by a participant to the Company under or in connection with this
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. 
 21. Term; Stockholder Approval. After this Plan is adopted by the Board, this Plan will become effective on the date that is the First Offering
Date (as defined above). This Plan shall be approved by the stockholders of the Company, in any manner permitted by applicable corporate law, within twelve (12) months before or after the date this Plan is adopted by the Board. No purchase of
shares pursuant to this Plan shall occur prior to such stockholder approval. This Plan shall continue until the earlier to occur of (a) termination of this Plan by the Board (which termination may be effected by the Board at any time),
(b) issuance of all of the shares of Common Stock reserved for issuance under this Plan, or (c) ten (10) years from the adoption of this Plan by the Board. 
 22. Designation of Beneficiary. 
 (a) A participant may file a written designation of a beneficiary
who is to receive any shares and cash, if any, from the participant’s account under this Plan in the event of such participant’s death subsequent to the end of an Purchase Period but prior to delivery to him 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 this Plan in the event of such participant’s death prior to a Purchase Date. 
 (b) Such designation of beneficiary may be changed by the participant at any time by written notice. In the event of the death of a participant and in
the absence of a beneficiary validly designated under this Plan who is living at the time of such participant’s death, the Company shall deliver such shares 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 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. 
 23. Conditions Upon Issuance of
Shares; Limitation on Sale of Shares. Shares shall not be issued with respect to an option unless the exercise of such option and the issuance and delivery of such shares pursuant thereto shall comply with all applicable provisions of law,
domestic or foreign, including, without limitation, the Securities Act, the Securities Exchange Act of 1934, the rules and regulations promulgated thereunder, and the requirements of any stock exchange or automated quotation system upon which the
shares may then be listed, and shall be further subject to the approval of counsel for the Company with respect to such compliance. 
  

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 24. Applicable Law. The Plan shall be governed by the substantive laws (excluding the conflict of
laws rules) of the State of California. 
 25. Amendment or Termination of this Plan. The Board may at any time amend, terminate or
extend the term of this Plan, except that any such termination cannot affect options previously granted under this Plan, nor may any amendment make any change in an option previously granted which would adversely affect the right of any participant,
nor may any amendment be made without approval of the stockholders of the Company obtained in accordance with Section 21 hereof within twelve (12) months of the adoption of such amendment (or earlier if required by Section 21) if such
amendment would: 
 (a) increase the number of shares that may be issued under this Plan; or 
 (b) change the designation of the employees (or class of employees) eligible for participation in this Plan. 
  

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