Document:

Executive Severance Plan

 Exhibit 10.39 
 KLA-TENCOR CORPORATION 
 EXECUTIVE SEVERANCE PLAN 
 (as amended on September 20, 2007) 
 1. Introduction 
 The KLA-Tencor Corporation Executive Severance Plan (the “Plan”) is designed to assure the
Company that it will have the continued dedication and availability of, and objective advice and counsel from the Participants and to provide Participants with the compensation and benefits described in the Plan in the event of their termination of
employment with the Company under the circumstances described in the Plan. This document constitutes the written instrument under which the Plan is maintained and supersedes any prior plan or practice of the Company that provides severance benefits
to Participants. 
 Participants shall be those Employees selected at the sole discretion of the Committee. 
 2. Definitions 
 For purposes of this
Plan, the following terms shall have the meanings set forth below: 
 (a) “Average Annual Incentive” shall
mean the average annual incentive earned and paid or payable under the Company’s annual incentive plans (including the Executive Performance Bonus Plan and Outstanding Corporate Performance Bonus Plan) for the last three full Company fiscal
years, including any portion earned but deferred; provided, however that if a Participant has not been employed by the Company for the last three full fiscal years, the Average Annual Incentive shall mean the Executive’s target bonus.

 (b) “Base Salary” shall mean the Participant’s annual base salary in effect as of the date of
termination but prior to any reduction to such Base Salary that would qualify as a Good Reason termination event. 
 (c)
“Board” means the Board of Directors of the Company. 
 (d) “Cause” shall mean
(A) outside of a Change of Control Period, the occurrence of any of the following events: (i) the Participant’s conviction of, or plea of nolo contendre to, a felony; (ii) the Participant’s gross misconduct; (iii) any
material act of personal dishonesty taken by the Participant in connection with his or her responsibilities as an employee of the Company, or (iv) the Participant’s willful and continued failure to perform the duties and responsibilities
of his or her position after there has been delivered to the Participant a written demand for performance from the Board which describes the basis for the Board’s belief that the Participant has not substantially performed his or her duties and
provides the Participant with thirty (30) days to take corrective action, and (B) within a Change of Control Period, the occurrence of any of the following events: (i) the Participant’s conviction of, or plea of nolo contendre
to, a felony that the Board reasonably 

 
believes has had or will have a material detrimental effect on the Company’s reputation or business; (ii) the Participant’s willful gross
misconduct with regard to the Company that is materially injurious to the Company; (iii) any act of personal dishonesty taken by the Participant in connection with his or her responsibilities as an employee of the Company with the intention or
reasonable expectation that such action may result in substantial personal enrichment of the Participant or (iv) the Participant’s willful and continued failure to perform the duties and responsibilities of his or her position after there
has been delivered to the Participant a written demand for performance from the Board which describes the basis for the Board’s belief that the Participant has not substantially performed his or her duties and provides the Participant with
thirty (30) days to take corrective action. 
 (e) “Change of Control” shall mean the occurrence of any
of the following events: (i) any “person” (as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended) becoming the “beneficial owner” (as defined in Rule 13d-3 under said
Act), directly or indirectly, of securities of the Company representing 50% or more of the total voting power represented by the Company’s then outstanding voting securities; (ii) the sale or disposition by the Company of all or
substantially all of the Company’s assets; (iii) the consummation by the Company of a merger or consolidation of the Company with any other corporation, other than a merger or consolidation which would result in the voting securities of
the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) more than 50% of the total voting power represented by the voting
securities of the Company or such surviving entity outstanding immediately after such merger or consolidation, or (iv) a change in the composition of the Board, as a result of which fewer than a majority of the directors are Incumbent
Directors. “Incumbent Directors” shall mean directors who either (A) are directors of the Company as of the date hereof or (B) are elected, or nominated for election, to the Board with the affirmative votes of at least a majority
of those directors whose election or nomination was not in connection with any transactions described in subsections (i), (ii) or (iii) or in connection with an actual or threatened proxy contest relating to the election of directors of
the Company. 
 (f) “Change in Control Period” shall mean the two (2) year period commencing upon the
occurrence of a Change in Control. 
 (g) “Code” shall mean the Internal Revenue Code of 1986, as amended.

 (h) “Committee” shall mean the Board or such committee appointed by the Board to act as the committee for
purposes of administering the Plan. 
 (i) “Company” shall mean KLA-Tencor Corporation, any subsidiary
corporations, any successor entities and any parent or subsidiaries of such successor entities. 
 (j) “Effective
Date” shall mean January 1, 2006. 
 (k) “Employee” shall mean a full-time regular employee of
the Company. 

 (l) “Good Reason” shall mean (A) outside of a Change of Control
Period, the occurrence of any of the following events: (i) a material reduction of the Participant’s duties, title, authority or responsibilities; (ii) a reduction in the Participant’s Base Salary, other than a reduction that
applies to other executives generally; (iii) a material reduction in the aggregate level of the Participant’s employee benefits, or overall compensation, other than a reduction that applies to other executives generally; or (iv) the
relocation of the Participant’s office more than thirty-five (35) miles from its then present location, unless such relocated office is closer to the Participant’s then principal residence, and (B) within a Change of Control
Period, the occurrence of any of the events listed above in this paragraph except that any reduction in Participant’s Base Salary shall constitute Good Reason even if such reduction applies to other executives generally; provided
however, that in no event shall Good Reason exist unless the Participant provides the Company with thirty (30) days written notice specifying in detail the grounds for a purported Good Reason resignation and the Company fails to cure the
purported grounds for the Good Reason within such thirty (30) day notice period. 
 (m) “Participant”
shall mean an Employee who meets the eligibility requirements of Section 3. 
 (n) “Plan” shall mean
this KLA-Tencor Corporation Executive Severance Plan. 
 (o) “Plan Year” shall mean the Company’s fiscal
year. 
 (p) “Prorated Annual Incentive” shall mean the annual incentive paid to the Participant under the
Company’s annual incentive plans (including the Executive Performance Bonus Plan and Outstanding Corporate Performance Bonus Plan) for the most recently completed year, including any portion earned but deferred, multiplied by a fraction, the
numerator of which is the number of days in the then current fiscal year through the date of the Participant’s termination, and the denominator of which is equal to 365. 
 (q) “Severance Multiple” shall mean the Participant’s Severance Period, expressed in years or fractions thereof
(e.g., a Severance Period of two years results in a Severance Multiple of two). The Severance Multiple may be different for periods outside of the Change in Control Period and within the Change of Control Period. 
 (r) “Severance Payment” shall mean the payment of severance compensation as provided in Section 4 hereof.

 (s) “Severance Period” shall mean the number of years (which may include fractional years) established by
the Committee for an individual Participant. The Severance Period may be different for periods outside of the Change in Control Period and within the Change of Control Period. 
 3. Eligibility 
 (a)
Waiver. As a condition of receiving benefits under the Plan, a Participant must sign a general waiver and release (the “Release”) on a form provided by (and in favor of) the Company and not revoke the Release within the time
permitted under applicable state or federal law. 

 (b) Participation in Plan. Each Employee designated by the Committee shall be a
Participant in the Plan. The Committee may designate that a Participant only participate with respect to certain terminations of employment during or related to the Change of Control Period as set forth in Sections 4(c) and 4(d) hereof and not with
respect to certain terminations of employment outside of and unrelated to the Change of Control Period, as set forth in Section 4(b) hereof. A Participant shall cease to be a Participant in the Plan when he or she ceases to be an Employee of
the Company (unless such Participant is then entitled to a Severance Payment under the Plan) or when the Plan expires. A Participant entitled to a Severance Payment shall remain a Participant in the Plan until the full amount of the benefits has
been delivered to the Participant, notwithstanding the prior expiration of the Plan. Upon receipt of all the Severance Payments, the Participant releases the Company from any and all further obligations under the Plan. 
 4. Severance Benefits 
 (a) Termination of Employment. In the event that the Participant’s employment with the Company terminates for any reason, the Participant shall be entitled to any (i) unpaid Base Salary accrued up to the effective date of
termination; (ii) unreimbursed business expenses required to be reimbursed to the Participant in accordance with the Company’s business expense reimbursement policy, and (iii) pay for accrued but unused vacation that the Company is
legally obligated to pay the Participant. In addition, if the termination is by the Company other than for Cause or if the Participant resigns for Good Reason, the Participant shall be entitled to the amounts and benefits specified below.

 (b) Termination by the Company Without Cause or the Participant Terminates for Good Reason. If the
Participant’s employment is terminated by the Company without Cause or if the Participant resigns for Good Reason, and such termination is not during the Change of Control Period, then, subject to Sections 3(a) and 5, the Participant shall
receive: (i) an amount equal to the Participant’s Severance Multiple multiplied by the Participant’s Base Salary, payable in equal installments over the Severance Period and in accordance with the Company’s normal payroll
policies; (ii) the Participant’s Prorated Annual Incentive, and (iii) accelerated vesting with respect to the Participant’s then outstanding unvested equity awards with the Participant to receive additional vesting credit to be
calculated based on the ratio of the number of months (with such number rounded up to include any fractional months) from the date of grant of any such awards to the number of months (with such number rounded up to include any fractional months) in
the total vesting period of any such awards, and (iv) with respect to any of the Participant’s then outstanding options or stock appreciation rights granted on or after the Effective Date (“New Options/SARs”), any New Option/SAR
shall have an extended post-termination exercise period equal to the earlier of (A) twelve (12) months from the date of termination, or (B) the original term of such New Option/SAR. 
 (c) Termination Without Cause or Resignation for Good Reason During the Change of Control Period. If the Participant’s
employment is terminated by the Company without Cause or by the Participant for Good Reason, and the termination is within the Change in Control Period, then, subject to Sections 3(a) and 5, Participant shall receive: (i) an amount equal
to the Participant’s Severance Multiple multiplied by the sum of the Participant’s Base Salary and Average Annual Incentive, payable in equal installments over the Severance Period and in accordance with the Company’s normal payroll
policies; (ii) the Participant’s Prorated Annual Incentive; (iii) 100% accelerated vesting with respect to the Participant’s then outstanding unvested equity awards, (iv) any New Option/SAR shall have an extended
post-termination exercise period equal to the earlier of (A) twelve (12) months from the date of termination, or (B) the original term of such New Option/SAR, and (v) $2000 per month for the duration of the Severance Period.

 (d) Certain Terminations Prior to a Change of Control. If a Change in Control
occurs, and if the Participant’s employment is terminated within six (6) months prior to the Change in Control and the Participant can prove to the Committee’s satisfaction (as determined by the Committee in its sole discretion) that
such termination arose in connection with or anticipation of a Change in Control, then for purposes of the Plan, such termination shall be deemed to have occurred during the Change in Control Period. 
 (e) Golden Parachute Excise Taxes. 
 (i) Parachute Payments of Less than 3x Base Amount Plus Fifty Thousand Dollars. In the event that the benefits provided for in this agreement or otherwise payable to Participant (a) constitute
“parachute payments” within the meaning of Section 280G of the Internal Revenue Code of 1986, as amended (the “Code”), (b) would be subject to the excise tax imposed by Section 4999 of the Code, and (c) the
aggregate value of such parachute payments, as determined in accordance with Section 280G of the Code and the proposed Treasury Regulations thereunder (or the final Treasury Regulations, if they have then been adopted) is less than the product
obtained by multiplying three by Participant’s “base amount” within the meaning of Code Section 280G(b)(3) and adding to such product fifty thousand dollars, then such benefits shall be reduced to the extent necessary (but only
to that extent) so that no portion of such benefits will be subject to excise tax under Section 4999 of the Code. 
 (ii)
Parachute Payments Equal to or Greater than 3x Base Amount Plus Fifty Thousand Dollars. In the event that the benefits provided for in this agreement or otherwise payable to Participant (a) constitute “parachute payments”
within the meaning of Section 280G of the Code, (b) would be subject to the excise tax imposed by Section 4999 of the Code, and (c) the aggregate value of such parachute payments, as determined in accordance with
Section 280G of the Code and the proposed Treasury Regulations thereunder (or the final Treasury Regulations, if they have then been adopted) is equal to or greater than the product obtained by multiplying three by Participant’s “base
amount” within the meaning of Code Section 280G(b)(3) and adding to such product fifty thousand dollars, then (A) the benefits shall be delivered in full, and (B) the Participant shall receive (1) a payment from the Company
sufficient to pay such excise tax and (2) an additional payment from the Company sufficient to pay the federal and state income and employment taxes and additional excise taxes arising from the payments made to the Participant by the Company
pursuant to this clause (B). 
 (iii) 280G Determinations. Unless the Company and the Participant otherwise agree in
writing, the determination of Participant’s excise tax liability and the amount required to be paid or reduced under this Section 4(e) shall be made in writing by the Company’s independent auditors who are primarily used by the
Company immediately prior to the Change of Control (the “Accountants”). For purposes of making the calculations required by this Section 4(e), the Accountants may make reasonable assumptions and approximations concerning applicable
taxes and may rely on reasonable, good faith interpretations concerning the application of Sections 280G 

 
and 4999 of the Code. The Company and the Participant shall furnish to the Accountants such information and documents as the Accountants may reasonably
request in order to make a determination under this Section. The Company shall bear all costs the Accountants may reasonably incur in connection with any calculations contemplated by this Section 5. 
 (f) Internal Revenue Code Section 409A. Notwithstanding any other provision of this Plan, if the Participant is a “key
employee” under Code Section 409A and a delay in making any payment or providing any benefit under this Plan is required by Code Section 409A, such payments shall not be made until the end of six (6) months following the date of
the Participant’s separation from service as required by Code Section 409A. 
 (g) Mitigation Required.
Payments and benefits provided for under the Plan shall be reduced by any compensation or benefits earned by the Participant as a result of any earnings or benefits that the Participant may receive from any other source following his or her
termination of employment. Moreover, payments and benefits provided for under the Plan shall be reduced by any payments or benefits received by Participant pursuant to any other plan, policy, agreement or arrangement with the Company. 
 5. Covenants not to Compete and not to Solicit. 
 (a) Remedies for Breach. The Company’s obligations to provide Severance Payments as provided in Section 4 are expressly conditioned upon the Participant’s covenants not to compete and not to
solicit as provided herein. In the event the Participant breaches his or her obligations to the Company as provided herein, the Company’s obligations to make Severance Payments to the Participant pursuant to Section 4 shall cease, without
prejudice to any other remedies that may be available to the Company. 
 (b) Covenant Not to Compete. If a Participant
is receiving Severance Payments pursuant to 4 hereof, then for the duration of the Severance Period, the Participant shall not directly engage in (whether as an employee, consultant, proprietor, partner, director or otherwise), or have any ownership
interest in, or participate in the financing, operation, management or control of, any person, firm, corporation or business that engages or participates anywhere in the world in providing goods and services similar to those provided by the Company
upon the date of the Participant’s termination of employment. Ownership of less than 3% of the outstanding voting stock of a publicly-held corporation or other entity shall not constitute a violation of this provision. 
 (c) Covenant Not to Solicit. If a Participant is receiving Severance Payments pursuant to Section 4 hereof, he or she
shall not, at any time during the Severance Period, directly or indirectly solicit any individuals to leave the Company’s employ for any reason or interfere in any other manner with the employment relationships at the time existing between the
Company and its current or prospective employees. 
 (d) Representations. The covenants contained in this
Section 5 shall be construed as a series of separate covenants, one for each county, city and state (or analogous entity) and country of the world. If, in any judicial proceeding, a court shall refuse to enforce any of the separate covenants,
or any part thereof, then such unenforceable covenant, or such part thereof, shall be deemed eliminated from this Plan for the purpose of those proceedings to the extent necessary to permit the remaining separate covenants, or portions thereof, to
be enforced. 

 (e) Reformation. In the event that the provisions of this Section 5 should ever be
deemed to exceed the time or geographic limitations, or scope of this covenant, permitted by applicable law, then such provisions shall be reformed to the maximum time or geographic limitations, as the case may be, permitted by applicable laws.

 6. Employment Status; Withholding 
 (a) Employment Status. This Plan does not constitute a contract of employment or impose on the Participant or the Company any obligation to retain the Participant as an Employee, to change the status of the
Participant’s employment, or to change the Company’s policies regarding termination of employment. The Participant’s employment is and shall continue to be at-will, as defined under applicable law. If the Participant’s employment
with the Company or a successor entity terminates for any reason, the Participant shall not be entitled to any payments, benefits, damages, awards or compensation other than as provided by this Plan or available in accordance with the Company’s
established employee plans and practices or other agreements with the Company at the time of termination. 
 (b) Taxation
of Plan Payments. All amounts paid pursuant to this Plan shall be subject to all applicable payroll and withholding taxes. 
 7.
Arbitration. Any dispute or controversy that shall arise out of the terms and conditions of the Plan and that cannot be resolved within thirty (30) days of the dispute or controversy through good-faith negotiation or non-binding
mediation between the Participant and the Company, shall be subject to binding arbitration in Santa Clara, California before the American Arbitration Association under its National Rules for the Resolution of Employment Disputes, supplemented by the
California Rules of Civil Procedure. The prevailing party in any arbitration shall be entitled to injunctive relief in any court of competent jurisdiction to enforce the arbitration award. 
 8. Successors to Company and Participants. 
 (a) Company’s Successors. Any successor to the Company (whether direct or indirect and whether by purchase, lease, merger, consolidation, liquidation or otherwise) to all or substantially all of the
Company’s business and/or assets shall assume the obligations under this Plan and agree expressly to perform the obligations under this Plan by executing a written agreement. For all purposes under this Plan, 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 subsection or which becomes bound by the terms of this Plan by operation of law. 
 (b) Participant’s Successors. All rights of the Participant hereunder shall inure to the benefit of, and be enforceable by,
the Participant’s personal or legal representatives, executors, administrators, successors, heirs, devisees and legatees. 

 9. Duration, Amendment and Termination 
 (a) Duration. The initial term of this Plan shall be three (3) years from the Effective Date. At the end of the initial three
(3) year term and any subsequent annual terms, the Plan shall be automatically extended for a one (1) year period unless terminated by the Committee prior to the end of such term, provided that any such termination shall be effective only
with respect to future Plan Years. Participants shall be given notice of a Plan termination within sixty (60) days of the Board’s decision. A termination of this Plan pursuant to the preceding sentence shall be effective for all purposes,
except that such termination shall not affect the right of a Participant whose employment termination date occurred prior to the termination date of the Plan to receive any Severance Payment to which such Participant is then entitled under the terms
of the Plan. 
 (b) Change in Control. In the event of a Change in Control during the term of the Plan, the term of the
Plan shall be the Change in Control Period. 
 (c) Amendment and Termination. The Committee, shall have the
discretionary authority to amend the Plan at any time, except no such amendment or termination shall affect the right of a Participant whose employment termination date occurred prior to the termination date of the Plan to receive any Severance
Payment to which such Participant is then entitled under the terms of the Plan without the written consent of the Participant. 
 10. Plan
Administration 
 (a) Plan Administrator. The Plan shall be administered by the Committee and the Committee shall
be responsible for the general administration and interpretation of the Plan and for carrying out its provisions. The Committee shall have such powers as may be necessary to discharge its duties hereunder. 
 (b) Procedures. The Committee may adopt such rules, regulations and bylaws and shall have the discretionary authority make such
decisions as it deems necessary or desirable for the proper administration of the Plan. Any rule or decision by the Committee shall be conclusive and binding upon all Participants. 
 11. Miscellaneous Provisions. 
 (a) Notices and all other communications contemplated by this Plan shall be in writing and shall be deemed to have been duly given when personally delivered or when mailed by U.S. registered or certified mail, return receipt requested and
postage prepaid. In the case of the Participant, mailed notices shall be addressed to him or her at the home address which he or she most recently communicated to the Company in writing. In the case of the Company, mailed notices shall be addressed
to the Company’s Vice-President, Human Resources, 160 Rio Robles, San Jose, CA 95134. 
 (b) The invalidity or
unenforceability of any provision or provisions of this Plan shall not affect the validity or enforceability of any other provision hereof, which shall remain in full force and effect. 
 (c) The rights of any person to payments or benefits under this Plan shall not be made subject to option or assignment, either by
voluntary or involuntary assignment or by operation of law, including (without limitation) bankruptcy, garnishment, attachment or other creditor’s process, and any action in violation of this subsection shall be void. However, payments and
benefits under the Plan may be reduced or offset by any amount a Participant may owe the Company, to the extent permitted by applicable law. 

 (d) Company may assign its rights under this Plan to an affiliate, and an affiliate may
assign its rights under this Plan to another affiliate of the Company or to the Company; provided, however, that no assignment shall be made if the net worth of the assignee is less than the net worth of the Company at the time of assignment;
provided, further, that the Company shall guarantee all benefits payable hereunder. In the case of any such assignment, the term “Company” when used in this Plan shall mean the corporation that actually employs the Participant.Aeluros, Inc. 2001 Stock Option/Stock Issuance Plan and forms of related agrmts.

 Exhibit 10.23 
 AELUROS, INC. 
 2001 STOCK OPTION/STOCK ISSUANCE PLAN 
 as amended on July 30, 2004, and September 23, 2004 
 ARTICLE ONE  
 GENERAL PROVISIONS 
 I. PURPOSE OF THE PLAN 
 This 2001
Stock Option/Stock Issuance Plan is intended to promote the interests of Aeluros, Inc., a Delaware corporation, by providing eligible persons in the Corporation’s employ or service with the opportunity to acquire a proprietary interest, or
otherwise increase their proprietary interest, in the Corporation as an incentive for them to continue in such employ or service. 
 Capitalized terms herein shall have the meanings assigned to such terms in the attached Appendix. 
 II. STRUCTURE OF THE PLAN

 A. The Plan shall be divided into two (2) separate equity programs: 
 (i) the Option Grant Program under which ‘eligible persons may, at the discretion of the Plan Administrator, be granted options to
purchase shares of Common Stock, and 
 (ii) the Stock Issuance Program under which eligible persons may, at the discretion of
the Plan Administrator, be issued shares of Common Stock directly, either through the immediate purchase of such shares or as a bonus for services rendered the Corporation (or any Parent or Subsidiary). 
 B. The provisions of Articles One and Four shall apply to both equity programs under the Plan and shall accordingly govern the interests of all persons
under the Plan. 
 III. ADMINISTRATION OF THE PLAN 
 A. The Plan shall be administered by the Board. However, any or all administrative functions otherwise exercisable by the Board may be delegated to the Committee. Members of the Committee shall serve for such period
of time as the Board may determine and shall be subject to removal by the Board at any time. The Board may also at any time terminate the functions of the Committee and reassume all powers and authority previously delegated to the Committee.

 B. The Plan Administrator shall have full power and authority (subject to the provisions of the Plan) to establish such rules and
regulations as it may deem appropriate for proper administration of the Plan and to make such determinations under, and issue such interpretations of, the Plan and any outstanding options or stock issuances thereunder as it may deem necessary or
advisable. Decisions of the Plan Administrator shall be final and binding on all parties who have an interest in the Plan or any option grant or stock issuance thereunder. 
 IV. ELIGIBILITY 
 A. The persons
eligible to participate in the Plan are as follows: 
 (i) Employees, 
 (ii) non-employee members of the Board or the non-employee members of the board of directors of any Parent or Subsidiary, and 

 (iii) consultants and other independent advisors who provide services to the Corporation
(or any Parent or Subsidiary). 
 B. The Plan Administrator shall have full authority to determine, (i) with respect to the grants made
under the Option Grant Program, which eligible persons are to receive such grants, the time or times when those grants are to be made, the number of shares to be covered by each such grant, the status of the granted option as either an Incentive
Option or a Non-Statutory Option, the time or times when each option is to become exercisable, the vesting schedule (if any) applicable to the option shares and the maximum term for which the option is to remain outstanding, and (ii) with
respect to stock issuances made under the Stock Issuance Program, which eligible persons are to receive such issuances, the time or times when those issuances are to be made, the number of shares to be issued to each Participant, the vesting
schedule (if any) applicable to the issued shares and the consideration to be paid by the Participant for such shares. 
 C. The Plan
Administrator shall have the absolute discretion either to grant options in accordance with the Option Grant Program or to effect stock issuances in accordance with the Stock Issuance Program. 
 V. STOCK SUBJECT TO THE PLAN 
 A. The
stock issuable under the Plan shall be shares of authorized but unissued or reacquired Common Stock. The maximum number of shares of Common Stock which may be issued over the term of the Plan shall not exceed twenty million seven hundred fifty-two
thousand five hundred (20,752,500) shares. 
 B. Shares of Common Stock subject to outstanding options shall be available for subsequent
issuance under the Plan to the extent (i) the options expire or terminate for any reason prior to exercise in full or (ii) the options are cancelled in accordance with the cancellation-regrant provisions of Article Two. Unvested shares
issued under the Plan and subsequently repurchased by the Corporation, at the option exercise or direct issue price paid per share, pursuant to the Corporation’s repurchase rights under the Plan shall be added back to the number of shares of
Common Stock reserved for issuance under the Plan and shall accordingly be available for reissuance through one or more subsequent option grants or direct stock issuances under the Plan. 
 C. Should any change be made to the Common Stock by reason of any stock split, stock dividend, recapitalization, combination of shares, exchange of
shares or other change affecting the outstanding Common Stock as a class without the Corporation’s receipt of consideration, appropriate adjustments shall be made to (i) the maximum number and/or class of securities issuable under the Plan
and (ii) the number and/or class of securities and the exercise price per share in effect under each outstanding option in order to prevent the dilution or enlargement of benefits thereunder. The adjustments determined by the Plan Administrator
shall be final, binding and conclusive. In no event shall any such adjustments be made in connection with the conversion of one or more outstanding shares of the Corporation’s preferred stock into shares of Common Stock. 
 ARTICLE TWO  
 OPTION
GRANT PROGRAM 
 I. OPTION TERMS 
 Each option shall be evidenced by one or more documents in the form approved by the Plan Administrator; provided, however, that each such document shall comply with the terms specified below. Each document
evidencing an Incentive Option shall, in addition, be subject to the provisions of the Plan applicable to such options. 
 A. Exercise
Price. 
 1. The exercise price per share shall be fixed by the Plan Administrator in accordance with the following
provisions: 
  

 2 

 (i) The exercise price per share shall not be less than eighty-five percent
(85%) of the Fair Market Value per share of Common Stock on the option grant date. 
 (ii) If the person to whom the
option is granted is a 10% Stockholder, then the exercise price per share shall not be less than one hundred ten percent (110%) of the Fair Market Value per share of Common Stock on the option grant date. 
 2. The exercise price shall become immediately due upon exercise of the option and shall, subject to the provisions of Section I of
Article Four and the documents evidencing the option, be payable in cash or check made payable to the Corporation. Should the Common Stock be registered under Section 12 of the 1934 Act at the time the option is exercised, then the exercise
price may also be paid as follows: 
 (iii) in shares of Common Stock held for the requisite period necessary to avoid a
charge to the Corporation’s earnings for financial reporting purposes and valued at Fair Market Value on the Exercise Date, or 
 (iv) to the extent the option is exercised for vested shares, through a special sale and remittance procedure pursuant to which the Optionee shall concurrently provide irrevocable instructions (A) to a Corporation-designated brokerage
firm to effect the immediate sale of the purchased shares and remit to the Corporation, out of the sale proceeds available on the settlement date, sufficient funds to cover the aggregate exercise price payable for the purchased shares plus all
applicable Federal, state and local income and employment taxes required to be withheld by the Corporation by reason of such exercise and (B) to the Corporation to deliver the certificates for the purchased shares directly to such brokerage
firm in order to complete the sale. 
 Except to the extent such sale and remittance procedure is utilized, payment of the exercise price for
the purchased shares must be made on the Exercise Date. 
 B. Exercise and Term of Options. Each option shall be exercisable at
such time or times, during such period and for such number of shares as shall be determined by the Plan Administrator and set forth in the documents evidencing the option grant. However, no option shall have a term in excess of ten (10) years
measured from the option grant date. 
 C. Effect of Termination of Service. 
 1. The following provisions shall govern the exercise of any options held by the Optionee at the time of cessation of Service or death:

 (i) Should the Optionee cease to remain in Service for any reason other than death, Disability or Misconduct, then the
Optionee shall have a period of three (3) months following the date of such cessation of Service during which to exercise each outstanding option held by such Optionee. 
 (ii) Should Optionee’s Service terminate by reason of Disability, then the Optionee shall have a period of twelve (12) months
following the date of such cessation of Service during which to exercise each outstanding option held by such Optionee. 
 (iii) If the Optionee dies while holding an outstanding option, then the personal representative of his or her estate or the person or persons to whom the option is transferred pursuant to the Optionee’s will or the laws of inheritance
or the Optionee’s designated beneficiary or beneficiaries of that option shall have a twelve (12)-month period following the date of the Optionee’s death to exercise such option. 
 (iv) Under no circumstances, however, shall any such option be exercisable after the specified expiration of the option term. 

(v) During the applicable post-Service exercise period, the option may not be exercised in the aggregate for more than the number of
vested shares for which the option is 
  

 3 

 exercisable on the date of the Optionee’s cessation of Service. Upon the expiration of the
applicable exercise period or (if earlier) upon the expiration of the option term, the option shall terminate and cease to be outstanding for any vested shares for which the option has not been exercised. However, the option shall, immediately upon
the Optionee’s cessation of Service, terminate and cease to be outstanding with respect to any and all option shares for which the option is not otherwise at the time exercisable or in which the Optionee is not otherwise at that time vested.

 (vi) Should Optionee’s Service be terminated for Misconduct or should Optionee otherwise engage in Misconduct while
holding one or more outstanding options under the Plan, then all those options shall terminate immediately and cease to remain outstanding. 
 2. The Plan Administrator shall have the discretion, exercisable either at the time an option is granted or at any time while the option remains outstanding, to: 
 (i) extend the period of time for which the option is to remain exercisable following Optionee’s cessation of Service or death from
the limited period otherwise in effect for that option to such greater period of time as the Plan Administrator shall deem appropriate, but in no event beyond the expiration of the option term, and/or 
 (ii) permit the option to be exercised, during the applicable post-Service exercise period, not only with respect to the number of vested
shares of Common Stock for which such option is exercisable at the time of the Optionee’s cessation of Service but also with respect to one or more additional installments in which the Optionee would have vested under the option had the
Optionee continued in Service. 
 D. Stockholder Rights. The holder of an option shall have no stockholder rights with respect
to the shares subject to the option until such person shall have exercised the option, paid the exercise price and become the recordholder of the purchased shares. 
 E. Unvested Shares. The Plan Administrator shall have the discretion to grant options which are exercisable for unvested shares of Common Stock. Should the Optionee cease Service while holding such
unvested shares, the Corporation shall have the right to repurchase, at the exercise price paid per share, any or all of those unvested shares. The terms upon which such repurchase right shall be exercisable (including the period and procedure for
exercise and the appropriate vesting schedule for the purchased shares) shall be established by the Plan Administrator and set forth in the document evidencing such repurchase right. The Plan Administrator may not impose a vesting schedule upon any
option grant or the shares of Common Stock subject to that option which is more restrictive than twenty percent (20%) per year vesting, with the initial vesting to occur not later than one (1) year after the option grant date. However,
such limitation shall not be applicable to any option grants made to individuals who are officers of the Corporation, non-employee Board members or independent consultants. 
 F. First Refusal Rights. Until such time as the Common Stock is first registered under Section 12 of the 1934 Act, the Corporation
shall have the right of first refusal with respect to any proposed disposition by the Optionee (or any successor in interest) of any shares of Common Stock issued under the Plan. Such right of first refusal shall be exercisable in accordance with
the terms established by the Plan Administrator and set forth in the document evidencing such right. 
 G. Limited Transferability of
Options. An Incentive Stock Option shall be exercisable only by the Optionee during his or her lifetime and shall not be assignable or transferable other than by will or by the laws of inheritance following the Optionee’s death. A
Non-Statutory Option may be assigned in whole or in part during the Optionee’s lifetime to one or more members of the Optionee’s family or to a trust established exclusively for one or more such family members or to Optionee’s former
spouse, to the extent such assignment is in connection with the Optionee’s estate plan or pursuant to a domestic relations order. The assigned portion may only be exercised by the person or persons who acquire a proprietary interest in the
Non-Statutory Option pursuant to the assignment. The terms applicable to the assigned portion shall be the same as those in effect for the option immediately prior to such assignment and shall be set forth in such documents issued to the assignee as
the Plan Administrator may deem appropriate. Notwithstanding the foregoing, the Optionee may also designate one or more persons as the beneficiary 
  

 4 

 or beneficiaries of his or her outstanding options under the Plan, and those options shall, in accordance
with such designation, automatically be transferred to such beneficiary or beneficiaries upon the Optionee’s death while holding those options. Such beneficiary or beneficiaries shall take the transferred options subject to all the terms and
conditions of the applicable agreement evidencing each such transferred option, including (without limitation) the limited time period during which the option may be exercised following the Optionee’s death. 
 II. INCENTIVE OPTIONS 
 The terms
specified below shall be applicable to all Incentive Options. Except as modified by the provisions of this Section II, all the provisions of Articles One, Two and Four shall be applicable to Incentive Options. Options which are specifically
designated as Non-Statutory Options shall not be subject to the terms of this Section II. 
 A. Eligibility. Incentive Options
may only be granted to Employees. 
 B. Exercise Price. The exercise price per share shall not be less than one hundred percent
(100%) of the Fair Market Value per share of Common Stock on the option grant date. 
 C. Dollar Limitation. The aggregate
Fair Market Value of the shares of Common Stock (determined as of the respective date, or dates of grant) for which one or more options granted to any Employee under the Plan (or any other option plan of the Corporation or. any Parent or Subsidiary)
may for the first time become exercisable as Incentive Options during any one (1) calendar year shall not exceed the sum of One Hundred Thousand Dollars ($100,000). To the extent the Employee holds two (2) or more such options which become
exercisable for the first time in the same calendar year, the foregoing limitation on the exercisability of such options as Incentive Options shall be applied on the basis of the order in which such options are granted. 
 D. 10% Stockholder. If any Employee to whom an Incentive Option is granted is a 10% Stockholder, then the option term shall not exceed five
(5) years measured from the option grant date. 
 III. CORPORATE TRANSACTION 
 A. The shares subject to each option outstanding under the Plan at the time of a Corporate Transaction shall automatically vest in full so that each such
option shall, immediately prior to the effective date of the Corporate Transaction, become exercisable for all of the shares of Common Stock at the time subject to that option and may be exercised for any or all of those shares as fully-vested
shares of Common Stock. However, the shares subject to an outstanding option shall not vest on such an accelerated basis if and to the extent: (i) such option is assumed by the successor corporation (or parent thereof) in the Corporate
Transaction and any repurchase rights of the Corporation with respect to the unvested option shares are concurrently assigned to such successor corporation (or parent thereof) or (ii) such option is to be replaced with a cash incentive program
of the successor corporation which preserves the spread existing on the unvested option shares at the time of the Corporate Transaction and provides for subsequent payout in accordance with the same vesting schedule applicable to those unvested
option shares or (iii) the acceleration of such option is subject to other limitations imposed by the Plan Administrator at the time of the option grant. 
 B. All outstanding repurchase rights under the Option Grant Program shall also terminate automatically, and the shares of Common Stock subject to those terminated rights shall immediately vest in full, in the event of
any Corporate Transaction, except to the extent: (i) those repurchase rights are assigned to the successor corporation (or parent thereof) in connection with such Corporate Transaction or (ii) such accelerated vesting is precluded by other
limitations imposed by the Plan Administrator at the time the repurchase right is issued. 
 C. Immediately following the consummation of the
Corporate Transaction, all outstanding options shall terminate and cease to be outstanding, except to the extent assumed by the successor corporation (or parent thereof). 
 D. Each option which is assumed in connection with a Corporate Transaction shall be appropriately adjusted, immediately after such Corporate Transaction, to apply to the number and class of securities 
  

 5 

 which would have been issuable to the Optionee in consummation of such Corporate Transaction, had the option been
exercised immediately prior to such Corporate Transaction. Appropriate adjustments shall also be made to (i) the number and class of securities available for issuance under the Plan following the consummation of such Corporate Transaction and
(ii) the exercise price payable per share under each outstanding option, provided the aggregate exercise price payable for such securities shall remain the same. To the extent the actual holders of the Corporation’s outstanding
Common Stock receive cash consideration for their Common Stock in consummation. of the. Corporate Transaction, the successor corporation may, in connection with the assumption of the outstanding options under this Plan, substitute one or more shares
of its own common stock with a fair market value equivalent to the cash consideration paid per share of Common Stock in such Corporate Transaction. 
 E. The Plan Administrator shall have the discretion, exercisable either at the time the option is granted or at any time while the option remains outstanding, to structure one or more options so that those options shall automatically
accelerate and vest in full (and any repurchase rights of the Corporation with respect to the unvested shares subject to those options shall immediately terminate) upon the occurrence of a Corporate Transaction, whether • or not those options
are to be assumed in the Corporate Transaction. 
 F. The Plan Administrator shall also have full power and authority, exercisable either at
the time the option is granted or at any time while the option remains outstanding, to structure such option so that the shares subject to that option will automatically vest on an accelerated basis should the Optionee’s Service terminate by
reason of an Involuntary Termination within a designated period (not to exceed eighteen (18) months) following the effective date of any Corporate Transaction in which the option is assumed and the repurchase rights applicable to those shares
do not otherwise terminate. Any option so accelerated shall remain exercisable for the fully-vested option shares until the expiration or sooner termination of the option term. In addition, the Plan Administrator may provide that one or more of the
Corporation’s outstanding repurchase rights with respect to shares held by the Optionee at the time of such Involuntary ‘Termination shall immediately terminate on an accelerated basis, and the shares subject to those terminated rights
shall accordingly vest at that time. 
 G. The portion of any Incentive Option accelerated in connection with a Corporate Transaction shall
remain exercisable as an Incentive Option only to the extent the applicable One Hundred Thousand Dollar limitation is not exceeded. To the extent such dollar limitation is exceeded, the accelerated portion of such option shall be exercisable as a
Non-Statutory Option under the Federal tax laws. 
 H. The grant of options under the Plan shall in no way affect the right of the
Corporation to adjust, reclassify, reorganize or otherwise change its capital or business structure or to merge, consolidate, dissolve, liquidate or sell or transfer all or any part .of its business or assets. 
 IV. CANCELLATION AND REGRANT OF OPTIONS 
 The Plan Administrator shall have the authority to effect, at any time and from time to time, with the consent of the affected option holders, the cancellation of any or all outstanding options under the Plan and to grant in substitution
therefor new options covering the same or different number of shares of Common Stock but with an exercise price per share based on the Fair Market Value per share of Common Stock on the new option grant date. 
 ARTICLE THREE  
 STOCK
ISSUANCE PROGRAM 
 I. STOCK ISSUANCE TERMS 
 Shares of Common Stock may be issued under the Stock Issuance Program through direct and immediate issuances without any intervening option grants. Each such stock issuance shall .be evidenced by a Stock Issuance
Agreement which complies with the terms specified below. 
 A. Purchase Price. 
  

 6 

 1. The purchase price per share shall be fixed by the Plan Administrator but shall not be
less than eighty-five percent (85%) of the Fair Market Value per share of Common Stock on the issue date. However, the purchase price per share of Common Stock issued to a 10% Stockholder shall not be less than one hundred and ten percent
(110%) of such Fair Market Value. 
 2. Subject to the provisions of Section I of. Article Four, shares of Common Stock
may be issued under the Stock Issuance Program for any of the following items of consideration which the Plan Administrator may deem appropriate in each individual instance: 
 (i) cash or check made payable to the Corporation, or 
 (ii) past services rendered to the Corporation (or any Parent or Subsidiary). 
 B. Vesting Provisions. 
 1. Shares of Common Stock issued under the Stock Issuance Program may, in the discretion of the Plan Administrator, be fully and immediately vested upon issuance or may vest in one or more installments over the Participant’s period of
Service or upon attainment of specified performance objectives. However, the Plan Administrator may not impose a vesting schedule upon any stock issuance effected under the Stock Issuance Program which is more restrictive than twenty percent
(20%) per year vesting, with initial vesting to occur not later than one (1) year after the issuance date. Such limitation shall not apply to any Common Stock issuances made to the officers of the Corporation, non-employee Board members or
independent consultants. 
 2. Any new, substituted or additional securities or other property (including money paid other
than as a regular cash dividend) which the Participant may have the right to receive with respect to the Participant’s unvested shares of Common Stock by reason of any stock dividend, stock split, recapitalization, combination of shares,
exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation’s receipt of consideration shall be issued subject to (i) the same vesting requirements applicable to the Participant’s
unvested shares of Common Stock and (ii) such escrow arrangements as the Plan Administrator shall deem appropriate. 
 3.
The Participant shall have full stockholder rights with respect to any shares of Common Stock issued to the Participant under the Stock Issuance Program, whether or not the Participant’s interest in those shares is vested. Accordingly, the
Participant shall have the right to vote such shares and to receive any regular cash dividends paid on such shares. 
 4.
Should the Participant cease to remain in. Service while holding one or more unvested shares of Common Stock issued under the Stock Issuance Program or should the performance objectives not be attained with respect to one or more such unvested
shares of Common Stock, then those shares shall be immediately surrendered to the Corporation for cancellation, and the Participant shall have no further stockholder rights with respect to those shares. To the extent the surrendered shares were
previously issued to the Participant for consideration paid in cash or cash equivalent (including the Participant’s purchase-money indebtedness), the Corporation shall repay to the Participant the cash consideration paid for the surrendered
shares and shall cancel the unpaid principal balance of any outstanding purchase-money note of the Participant attributable to such surrendered shares. 
 5. The Plan Administrator may in its discretion waive the surrender and cancellation of one or more unvested shares of Common Stock (or other assets attributable thereto) which would otherwise occur upon the
non-completion of the vesting schedule applicable to those shares. Such waiver shall result in the immediate vesting of the Participant’s interest in the shares of Common Stock as to which the waiver applies. Such waiver may be effected at any
time, whether before or after. the Participant’s cessation of Service or the attainment or non-attainment of the applicable performance objectives. 
 C. First Refusal Rights. Until such time as the Common Stock is first registered under Section 12 of the 1934 Act, the Corporation shall have the right of first refusal with respect to any proposed
disposition by the Participant (or any successor in interest) of any shares of Common Stock issued under the Stock Issuance Program. Such right of first refusal shall be exercisable in accordance with the terms established by the Plan Administrator
and set forth in the document evidencing such right. 
 II. CORPORATE TRANSACTION 
 A. Upon the occurrence of a Corporate Transaction, all outstanding repurchase rights under the Stock Issuance Program shall terminate automatically, and
the shares of Common Stock subject to those 
  

 7 

 terminated rights shall immediately vest in full, except to the extent: (i) those repurchase rights are assigned to
the successor corporation (or parent thereof) in connection with such Corporate Transaction or (ii) such accelerated vesting is precluded by other limitations imposed by the Plan Administrator at the time the repurchase right is issued.

 B. The Plan Administrator shall have the discretionary authority, exercisable either at the time the unvested shares are issued or any
time while the Corporation’s repurchase rights with respect to those shares remain outstanding, to provide that those rights shall automatically terminate on an accelerated basis, and the shares of Common Stock subject to those terminated
rights shall immediately vest, in the event the Participant’s Service should subsequently terminate by reason of an Involuntary Termination within a designated period (not to exceed eighteen (18) months) following the effective date of any
Corporate Transaction in which those repurchase rights are assigned to the successor corporation (or parent thereof). 
 III. SHARE
ESCROW/LEGENDS 
 Unvested shares may, in the Plan Administrator’s discretion, be held in escrow by the Corporation until the
Participant’s interest in such shares vests or may be issued directly to the Participant with restrictive legends on the certificates evidencing those unvested shares. 
 ARTICLE FOUR  
 MISCELLANEOUS 
 I. FINANCING 
 The Plan Administrator
may permit any Optionee or Participant to pay the option exercise price under the Option Grant Program or the purchase price for shares issued under the Stock Issuance Program by delivering a full-recourse, interest bearing promissory note payable
in one or more installments and secured by the purchased shares. In no event, however, may the maximum credit available to the Optionee or Participant exceed the sum of (i) the aggregate option exercise price or purchase price payable for the
purchased shares (less the par value of those shares) plus (ii) any Federal, state and local income and employment tax liability incurred by the Optionee or the Participant in connection with the option exercise or share purchase. 

II. EFFECTIVE DATE AND TERM OF, PLAN 
 A. The Plan shall become effective when adopted by the Board, but no option granted under the Plan may be exercised, and no shares shall be issued under the Plan, until the Plan is approved by the Corporation’s stockholders. If such
stockholder approval is not obtained within twelve (12) months after the date of the Board’s adoption of the Plan, then all options previously granted under the Plan shall terminate and cease to be outstanding, and no further options shall
be granted and no shares shall be issued under the Plan. Subject to such limitation, the Plan Administrator may grant options and issue shares under the Plan at any time after the effective date of the Plan and before the date fixed herein for
termination of the Plan. 
 B. The Plan shall terminate upon the earliest of (i) the expiration of the ten (10)-year period
measured from the date the Plan is adopted by the Board, (ii) the date on which all shares available for issuance under the Plan shall have been issued as vested shares or (iii) the termination of all outstanding options in connection with
a Corporate Transaction. All options and unvested stock issuances outstanding at the time of a clause (i) termination event shall continue to have full force and effect in accordance with the provisions of the documents evidencing those options
or issuances. 
 III. AMENDMENT OF THE PLAN 
 A. The Board shall have complete and exclusive power and authority to amend or modify the Plan in any or all respects. However, no such amendment or modification shall adversely affect the rights and obligations with
respect to options or unvested stock issuances at the time outstanding under the Plan unless the Optionee or the Participant consents to such amendment or modification. In addition, certain amendments may require stockholder approval pursuant to
applicable laws and regulations. 
  

 8 

 B. Options may be granted under the Option Grant Program and shares may be issued under the Stock
Issuance Program which are in each instance in excess of the number of shares of Common Stock then available for issuance under the Plan, provided any excess shares actually issued under those programs shall be held in escrow until there is obtained
stockholder approval of an amendment sufficiently increasing the number of shares of Common Stock available for issuance under the Plan. If such stockholder approval is not obtained within twelve (12) months after the date the first such excess
grants or issuances are made, then (i) any unexercised options granted on the basis of such excess shares shall terminate and cease to be outstanding and (ii) the Corporation shall promptly refund to the Optionees and the Participants the
exercise or purchase price paid for any excess shares issued under the Plan and held in escrow, together with interest (at the applicable Short Term Federal Rate) for the period the shares were held in escrow, and such shares shall thereupon be
automatically cancelled and cease to be outstanding. 
 IV. USE OF PROCEEDS 
 Any cash proceeds received by the Corporation from the sale of shares of Common Stock under the Plan shall be used for general corporate purposes.

 V. WITHHOLDING 
 The
Corporation’s obligation to deliver shares of Common Stock upon the exercise of any options granted under the Plan or upon the issuance or vesting of any shares issued under the Plan shall be subject to the satisfaction of all applicable
Federal, state and local income and employment tax withholding requirements. 
 VI. REGULATORY APPROVALS 
 The implementation of the Plan, the granting of any options under the Plan and the issuance of any shares of Common Stock (i) upon the exercise of
any option or (ii) under the Stock Issuance Program shall be subject to the Corporation’s procurement of all approvals and permits required by regulatory authorities having jurisdiction over the Plan, the options granted under it and the
shares of Common Stock issued pursuant to it. 
 VII. NO EMPLOYMENT OR SERVICE RIGHTS 
 Nothing in the Plan shall confer upon the Optionee or the Participant any right to continue in Service for any period of specific duration or interfere
with or otherwise restrict in any way the rights of the Corporation (or any Parent or Subsidiary employing or retaining such person) or of the Optionee or the Participant, which rights are hereby expressly reserved by each, to terminate such
person’s Service at any time for any reason, with or without cause. 
 VIII. FINANCIAL REPORTS 
 The Corporation shall deliver a balance sheet and an income statement at least annually to each individual holding an outstanding option under the Plan,
unless such individual is a key Employee whose duties in connection with the Corporation (or any Parent or Subsidiary) assure such individual access to equivalent information. 
  

 9 

 APPENDIX 
 The following definitions shall be in effect under the Plan: 
 A. Board shall mean the
Corporation’s Board of Directors. 
 B. Code shall mean the Internal Revenue Code of 1986, as amended. 
 C. Committee shall mean a committee of one (1) or more Board members appointed by the Board to exercise one or more administrative
functions under the Plan. 
 D. Common Stock shall mean the Corporation’s common stock. 
 E. Corporate Transaction shall mean either of the following stockholder-approved transactions to which the Corporation is a party:

 (i) a merger, consolidation or other reorganization approved by the Corporation’s stockholders, unless
securities representing more than fifty percent (50%) of the total combined voting power of the voting securities of the successor corporation are immediately thereafter beneficially owned, directly or indirectly and in substantially the same
proportion, by the persons who beneficially owned the Corporation’s outstanding voting securities immediately prior to such transaction, or 
 (ii) the sale, transfer or other disposition of all or substantially all of the Corporation’s assets in complete liquidation or dissolution of the Corporation. 
 F. Corporation shall mean Aeluros, Inc., a Delaware corporation, and any successor corporation to all or substantially all of the assets or
voting stock of Aeluros, Inc. which shall by appropriate action adopt the Plan. 
 G. Disability shall mean the inability of
the Optionee or the Participant to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment and shall be determined by the Plan Administrator on the basis of such medical evidence as the Plan
Administrator deems warranted under the circumstances. 
 H. Employee shall mean an individual who is in the employ of the
Corporation (or any Parent or Subsidiary), subject to the control and direction of the employer entity as to both the work to be performed and the manner and method of performance. 
 I. Exercise Date shall mean the date on which the Corporation shall have received written notice of the option exercise. 
 J. Fair Market Value per share of Common Stock on any relevant date shall be determined in accordance with the following provisions:

 (i) If the Common Stock is at the time traded on the Nasdaq National Market, then the Fair Market Value shall be the
closing selling price per share of Common Stock on the date in question, as such price is reported by the National Association of Securities Dealers on the Nasdaq National Market and published in The Wall Street Journal. If there is no
closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists. 
 (ii) If the Common Stock is at the time listed on any Stock Exchange, then the Fair Market Value shall be the closing selling price per
share of Common Stock on the date in question on the Stock Exchange determined by the Plan Administrator to be the primary market for the Common Stock, as such price is officially quoted in the composite tape of transactions on 
  

 10 

 such exchange and published in The Wall Street Journal. If there is no closing selling price for
the Common. Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists. 
 (iii) If the Common Stock is at the time neither listed on any Stock Exchange nor traded on the Nasdaq National Market, then the Fair
Market Value shall be determined by the Plan Administrator after taking into account such factors as the Plan Administrator shall deem appropriate. 
 K. Incentive Option shall mean an option which satisfies the requirements of Code Section 422. 
 L.
Involuntary Termination shall mean the termination of the Service of any individual which occurs by reason of: 
 (i) such individual’s involuntary dismissal or discharge by the Corporation for reasons other than Misconduct, or 
 (ii) such individual’s voluntary resignation following (A) a change in his or her position with the Corporation which materially reduces his or her duties and responsibilities or the level of management to which he or she reports,
(B) a reduction in his or her level of compensation (including base salary, fringe benefits and target bonus under any corporate-performance based bonus or incentive programs) by more than fifteen percent (15%) or (C) a relocation of
such individual’s place of employment by more than fifty (50) miles, provided and only if such change, reduction or relocation is effected without the individual’s consent. 
 M. Misconduct shall mean the commission of any act of fraud, embezzlement or dishonesty by the Optionee or Participant, any unauthorized
use or disclosure by such person of confidential information or trade secrets of the Corporation (or any Parent or Subsidiary), or any other intentional misconduct by such person adversely affecting the business or affairs of the Corporation (or any
Parent or Subsidiary) in a material manner. The foregoing definition shall not in any way preclude or restrict the right of the Corporation (or any Parent or Subsidiary) to discharge or dismiss any Optionee, Participant or other person in the
Service of the Corporation (or any Parent or Subsidiary) for any other acts or omissions, but such other acts or omissions shall not be deemed, for purposes of the Plan, to constitute grounds for termination for Misconduct. 
 N. 1934 Act shall mean the Securities Exchange Act of 1934, as amended. 
 O. Non-Statutory Option shall mean an option not intended to satisfy the requirements of Code Section 422. 
 P. Option Grant Program shall mean the option grant program in effect under the Plan. 
 Q. Optionee shall mean any person to whom an option is granted under the Plan. 
 R. Parent shall mean any’ corporation (other than the Corporation) in an unbroken chain of corporations ending with the Corporation,
provided each corporation in the unbroken chain (other than the Corporation) owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other
corporations in such chain. 
 S. Participant shall mean any person who is issued shares of Common Stock under the Stock
Issuance Program. 
 T. Plan shall mean the Corporation’s 2001 Stock Option/Stock Issuance Plan, as set forth in this document.

  

 11 

 U. Plan Administrator shall mean either the Board or the Committee acting in its capacity
as administrator of the Plan. 
 V. Service shall mean the provision of services to the Corporation (or any Parent or
Subsidiary) by a person in the capacity of an Employee, a non-employee member of the board of directors or a consultant or independent advisor, except to the extent otherwise specifically provided in the documents evidencing the option grant.

 W. Stock Exchange shall mean either the American Stock Exchange or the New York Stock Exchange. 
 X. Stock Issuance Agreement shall mean the agreement entered into by the Corporation and the Participant at the time of issuance of shares
of Common Stock under the Stock Issuance Program. 
 Y. Stock Issuance Program shall mean the stock issuance program in effect
under the Plan. 
 Z. Subsidiary shall mean any corporation (other than the Corporation) in an unbroken chain of corporations
beginning with the Corporation, provided each corporation (other than the last corporation) in the unbroken chain owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all
classes of stock in one of the other corporations in such chain. 
 AA. 10% Stockholder shall mean the owner of stock (as
determined under Code Section 424(d)) possessing more than ten percent (10%) of the total combined voting power of all classes of stock of the Corporation (or any Parent or Subsidiary) 
  

 12 

 AELUROS, INC. 
 STOCK OPTION AGREEMENT 
 RECITALS 
 A. The Board has adopted the Plan for the purpose of retaining the services of selected Employees, non-employee members of the Board or the board of
directors of any Parent or Subsidiary and consultants and other independent advisors in the service of the Corporation (or any Parent or Subsidiary). 
 B. Optionee is to render valuable services to the Corporation (or a Parent or Subsidiary), and this Agreement is executed pursuant to, and is intended to carry out the purposes of, the Plan in connection with the
Corporation’s grant of an option to Optionee. 
 C. All capitalized terms in this Agreement shall have the meaning assigned to them in
the attached Appendix. 
 NOW, THEREFORE, it is hereby agreed as follows: 
 1. Grant of Option. The Corporation hereby grants to Optionee, as of the Grant Date, an option to purchase up to the number of Option
Shares specified in the Grant Notice. The Option Shares shall be purchasable from time to time during the option term specified in Paragraph 2 at the Exercise Price. 
 2. Option Term. This option shall have a term of ten (10) years measured from the Grant Date and shall accordingly expire at the close of business on the Expiration Date, unless sooner terminated in
accordance with Paragraph 5 or 6. 
 3. Limited Transferability. 
 (a) This option shall be neither transferable nor assignable by Optionee other than by will or the laws of inheritance following
Optionee’s death and may be exercised, during Optionee’s lifetime, only by Optionee. However, Optionee may designate one or more persons as the beneficiary or beneficiaries of this option, and this option shall, in accordance with such
designation, automatically be transferred to such beneficiary or beneficiaries upon the Optionee’s death while holding this option. Such beneficiary or beneficiaries shall take the transferred option subject to all the terms and conditions of
this Agreement, including (without limitation) the limited time period during which this option may, pursuant to Paragraph 5, be exercised following Optionee’s death. 
 (b) If this option is designated a Non-Statutory Option in the Grant Notice, then this option may be assigned in whole or in part during
Optionee’s lifetime to one or more members of Optionee’s family or to a trust established for the exclusive benefit of one or more such family members or to Optionee’s former spouse, to the extent such assignment is in 
  

 13 

 connection with the Optionee’s estate plan or pursuant to a domestic relations order. The assigned
portion shall be exercisable only by the person or persons who acquire a proprietary interest in the option pursuant to such assignment. The terms applicable to the assigned portion shall be the same as those in effect for this option immediately
prior to such assignment. 
 4. Dates of Exercise. This option shall become exercisable for the Option Shares in one or more
installments as specified in the Grant Notice. As the option becomes exercisable for such installments, those installments shall accumulate, and the option shall remain exercisable for the accumulated installments until the Expiration Date or sooner
termination of the option term under Paragraph 5 or 6. 
 5. Cessation of Service. The option term specified in Paragraph 2
shall terminate (and this option shall cease to be outstanding) prior to the Expiration Date should any of the following provisions become applicable: 
 (a) Should Optionee cease to remain in Service for any reason (other than death, Disability or Misconduct) while holding this option, then Optionee shall have a period of three (3) months (commencing with the
date of such cessation of Service) during which to exercise this option, but in no event shall this option be exercisable at any time after the Expiration Date. 
 (b) Should Optionee die while holding this option, then the personal representative of Optionee’s estate or the person or persons to
whom the option is transferred pursuant to Optionee’s will or the laws of inheritance shall have the right to exercise this option. However, if Optionee has designated one or more beneficiaries of this option, then those persons shall have the
exclusive right to exercise this option following Optionee’s death. Any such right to exercise this option shall lapse, and this option shall cease to be outstanding, upon the earlier of (i) the expiration of the twelve (12)-month
period measured from the date of Optionee’s death or (ii) the Expiration Date. 
 (c) Should Optionee cease Service
by reason of Disability while holding this option, then Optionee shall have a period of twelve (12) months (commencing with the date of such cessation of Service) during which to exercise this option. In no event shall this option be
exercisable at any time after the Expiration Date. 
 Note: Exercise of this option on a date later than three
(3) months following cessation of Service due to Disability will result in loss of favorable Incentive Option treatment, unless such Disability constitutes Permanent Disability. In the event that Incentive Option treatment is not
available, this option will be taxed as a Non-Statutory Option upon exercise. 
 (d) During the limited period of post-Service
exercisability, this option may not be exercised in the aggregate for more than the number of Option Shares in which Optionee is, at the time of Optionee’s cessation of Service, vested pursuant to the Vesting Schedule specified in the Grant
Notice or the special vesting acceleration provisions of 
  

 14 

 Paragraph 6. Upon the expiration of such limited exercise period or (if earlier) upon the Expiration
Date, this option shall terminate and cease to be outstanding for any vested Option Shares for which the option has not been exercised. To the extent Optionee is not vested in one or more Option Shares at the time of Optionee’s cessation of
Service, this option shall immediately terminate and cease to be outstanding with respect to those shares. 
 (e) Should
Optionee’s Service be terminated for Misconduct or should Optionee otherwise engage in Misconduct while this option is outstanding, then this option shall terminate immediately and cease to remain outstanding. 
 6. Accelerated Vesting. 
 (a) In the event of any Corporate Transaction, the Option Shares at the time subject to this option but not otherwise vested shall automatically vest in full so that this option shall, immediately prior to the
effective date of the Corporate Transaction, become exercisable for all of the Option Shares as fully-vested shares and may be exercised for any or all of those Option Shares as vested shares. However, the Option Shares shall not vest on such an
accelerated basis if and to the extent: (i) this option is assumed by the successor corporation (or parent thereof) in the Corporate Transaction and the Corporation’s repurchase rights with respect to the unvested Option Shares are
assigned to such successor corporation (or parent thereof) or (ii) this option is to be replaced with a cash incentive program of the successor corporation which preserves the spread existing on the unvested Option Shares at the time of the
Corporate Transaction (the excess of the Fair Market Value of those Option Shares over the Exercise Price payable for such shares) and provides for subsequent payout in accordance with the same Vesting Schedule applicable to those unvested Option
Shares as set forth in the Grant Notice. 
 (b) Immediately following the Corporate Transaction, this option shall terminate
and cease to be outstanding, except to the extent assumed by the successor corporation (or parent thereof) in connection with the Corporate Transaction. 
 (c) If this option is assumed in connection with a Corporate Transaction, then this option shall be appropriately adjusted, immediately after such Corporate Transaction, to apply to the number and class of securities
which would have been issuable to Optionee in consummation of such Corporate Transaction had the option been exercised immediately prior to such Corporate Transaction, and appropriate adjustments shall also be made to the Exercise Price,
provided the aggregate Exercise Price shall remain the same. To the extent the actual holders of the Corporation’s outstanding Common Stock receive cash consideration for their Common Stock in consummation of the Corporate Transaction,
the successor corporation may, in connection with the assumption of this option, substitute one or more shares of its own common stock with a fair market value equivalent to the cash consideration paid per share of Common Stock in such Corporate
Transaction. 
 (d) This Agreement shall not in any way affect the right of the Corporation to adjust, reclassify, reorganize
or otherwise change its capital or business structure or to merge, consolidate, dissolve, liquidate or sell or transfer all or any part of its business or assets. 
  

 15 

 7. Adjustment in Option Shares. Should any change be made to the Common Stock by reason of
any stock split, stock dividend, recapitalization, combination of shares, exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation’s receipt of consideration, appropriate adjustments shall be
made to (i) the total number and/or class of securities subject to this option and (ii) the Exercise Price in order to reflect such change and thereby preclude a dilution or enlargement of benefits hereunder. 
 8. Stockholder Rights. The holder of this option shall not have any stockholder rights with respect to the Option Shares until such person
shall have exercised the option, paid the Exercise Price and become the record holder of the purchased shares. 
 9. Manner of
Exercising Option. 
 (a) In order to exercise this option with respect to all or any part of the Option Shares for
which this option is at the time exercisable, Optionee (or any other person or persons exercising the option) must take the following actions: 
 (i) Execute and deliver to the Corporation a Purchase Agreement for the Option Shares for which the option is exercised. 
 (ii) Pay the aggregate Exercise Price for the purchased shares in one or more of the following forms: 
 (A) cash or check made payable to the Corporation; or 
 (B) a promissory note payable to the
Corporation, but only to the extent authorized by the Plan Administrator in accordance with Paragraph 14. 
 Should the Common
Stock be registered under Section 12 of the 1934 Act at the time the option is exercised, then the Exercise Price may also be paid as follows: 
 (C) in shares of Common Stock held by Optionee (or any other person or persons exercising the option) for the requisite period necessary to avoid a charge to the Corporation’s earnings for financial reporting
purposes and valued at Fair Market Value on the Exercise Date; or 
 (D) to the extent the option is exercised for vested
Option Shares, through a special sale and remittance procedure pursuant to which Optionee (or any other person or persons exercising the option) shall concurrently provide irrevocable instructions (a) to a Corporation-designated brokerage firm
to effect the immediate sale of the 
  

 16 

 purchased shares and remit to the Corporation, out of the sale proceeds available on the settlement
date, sufficient funds to cover the aggregate Exercise Price payable for the purchased shares plus all applicable Federal, state and local income and employment taxes required to be withheld by the Corporation by reason of such exercise and
(b) to the Corporation to deliver the certificates for the purchased shares directly to such brokerage firm in order to complete the sale. 
 Except to the extent the sale and remittance procedure is utilized in connection with the option exercise, payment of the Exercise Price must accompany the Purchase Agreement delivered to the Corporation in connection
with the option exercise. 
 (iii) Furnish to the Corporation appropriate documentation that the person or persons exercising
the option (if other than Optionee) have the right to exercise this option. 
 (iv) Execute and deliver to the Corporation
such written representations as may be requested by the Corporation in order for it to comply with the applicable requirements of Federal and state securities laws. 
 (v) Make appropriate arrangements with the Corporation (or Parent or Subsidiary employing or retaining Optionee) for the satisfaction of
all Federal, state and local income and employment tax withholding requirements applicable to the option exercise. 
 (b) As
soon as practical after the Exercise Date, the Corporation shall issue to or on behalf of Optionee (or any other person or persons exercising this option) a certificate for the purchased Option Shares, with the appropriate legends affixed thereto.

 (c) In no event may this option be exercised for any fractional shares. 
 10. REPURCHASE RIGHTS. ALL OPTION SHARES ACQUIRED UPON THE EXERCISE OF THIS OPTION SHALL BE SUBJECT TO CERTAIN RIGHTS OF THE CORPORATION AND
ITS ASSIGNS TO REPURCHASE THOSE SHARES IN ACCORDANCE WITH THE TERMS SPECIFIED IN THE PURCHASE AGREEMENT. 
 11. Compliance with
Laws and Regulations. 
 (a) The exercise of this option and the issuance of the Option Shares upon such exercise
shall be subject to compliance by the Corporation and Optionee with all applicable requirements of law relating thereto and with all applicable regulations of any stock exchange (or the Nasdaq National Market, if applicable) on which the Common
Stock may be listed for trading at the time of such exercise and issuance. 
  

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 (b) The inability of the Corporation to obtain approval from any regulatory body having
authority deemed by the Corporation to be necessary to the lawful issuance and sale of any Common Stock pursuant to this option shall relieve the Corporation of any liability with respect to the non-issuance or sale of the Common Stock as to which
such approval shall not have been obtained. The Corporation, however, shall use its best efforts to obtain all such approvals. 
 12.
Successors and Assigns. Except to the extent otherwise provided in Paragraphs 3 and 6, the provisions of this Agreement shall inure to the benefit of, and be binding upon, the Corporation and its successors and assigns and Optionee,
Optionee’s assigns and the legal representatives, heirs and legatees of Optionee’s estate. 
 13. Notices. Any notice
required to be given or delivered to the Corporation under the terms of this Agreement shall be in writing and addressed to the Corporation 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 below Optionee’s signature line on the Grant Notice. All notices shall be deemed effective upon personal delivery or upon deposit in the U.S. mail, postage prepaid and properly
addressed to the party to be notified. 
 14. Financing. The Plan Administrator may, in its absolute discretion and without any
obligation to do so, permit Optionee to pay the Exercise Price for the purchased Option Shares (to the extent such Exercise Price is in excess of the par value of those shares) by delivering a full-recourse, interest-bearing promissory note secured
by those Option Shares. The payment schedule in effect for any such promissory note shall be established by the Plan Administrator in its sole discretion. 
 15. Construction. This Agreement and the option evidenced hereby are made and granted pursuant to the Plan and are in all respects limited by and subject to the terms of the Plan. All decisions of the
Plan Administrator with respect to any question or issue arising under the Plan or this Agreement shall be conclusive and binding on all persons having an interest in this option. 
 16. Governing Law. The interpretation, performance and enforcement of this Agreement shall be governed by the laws of the State of
California without resort to that State’s conflict-of-laws rules. 
 17. Stockholder Approval. If the Option Shares
covered by this Agreement exceed, as of the Grant Date, the number of shares of Common Stock which may be issued under the Plan as last approved by the stockholders, then this option shall be void with respect to such excess shares, unless
stockholder approval of an amendment sufficiently increasing the number of shares of Common Stock issuable under the Plan is obtained in accordance with the provisions of the Plan. 
  

 18 

 18. Additional Terms Applicable to an Incentive Option. In the event this option is
designated an Incentive Option in the Grant Notice, the following terms and conditions shall also apply to the grant: 
 (a)
This option shall cease to qualify for favorable tax treatment as an Incentive Option if (and to the extent) this option is exercised for one or more Option Shares: (i) more than three (3) months after the date Optionee ceases to be an
Employee for any reason other than death or Permanent Disability or (ii) more than twelve (12) months after the date Optionee ceases to be an Employee by reason of Permanent Disability. 
 (b) This option shall not become exercisable in the calendar year in which granted if (and to the extent) the aggregate Fair Market Value
(determined at the Grant Date) of the Common Stock for which this option would otherwise first become exercisable in such calendar year would, when added to the aggregate value (determined as of the respective date or dates of grant) of the Common
Stock and any other securities for which one or more other Incentive Options granted to Optionee prior to the Grant Date (whether under the Plan or any other option plan of the Corporation or any Parent or Subsidiary) first become exercisable during
the same calendar year, exceed One Hundred Thousand Dollars ($100,000) in the aggregate. To the extent the exercisability of this option is deferred by reason of the foregoing limitation, the deferred portion shall become exercisable in the first
calendar year or years thereafter in which the One Hundred Thousand Dollar ($100,000) limitation of this Paragraph 18(b) would not be contravened, but such deferral shall in all events end immediately prior to the effective date of a Corporate
Transaction in which this option is not to be assumed, whereupon the option shall become immediately exercisable as a Non-Statutory Option for the deferred portion of the Option Shares. 
 (c) Should Optionee hold, in addition to this option, one or more other options to purchase Common Stock which become exercisable for the
first time in the same calendar year as this option, then the foregoing limitations on the exercisability of such options as Incentive Options shall be applied on the basis of the order in which such options are granted. 
  

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 APPENDIX 
 The following definitions shall be in effect under the Agreement: 
 A. Agreement shall mean
this Stock Option Agreement. 
 B. Board shall mean the Corporation’s Board of Directors. 
 C. Code shall mean the Internal Revenue Code of 1986, as amended. 
 D. Common Stock shall mean the Corporation’s common stock. 
 E. Corporate Transaction shall mean either of the following stockholder-approved transactions to which the Corporation is a party:

 (i) a merger, consolidation or other reorganization approved by the Corporation’s stockholders, unless
securities representing more than fifty percent (50%) of the total combined voting power of the voting securities of the successor corporation are immediately thereafter beneficially owned, directly or indirectly and in substantially the same
proportion, by the persons who beneficially owned the Corporation’s outstanding voting securities immediately prior to such transaction, or 
 (ii) the sale, transfer or other disposition of all or substantially all of the Corporation’s assets in complete liquidation or dissolution of the Corporation. 
 F. Corporation shall mean Aeluros, Inc., a Delaware corporation, and any successor corporation to all or substantially all of the assets or
voting stock of Aeluros, Inc. which shall by appropriate action assume this option. 
 G. Disability shall mean the inability
of Optionee to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment and shall be determined by the Plan Administrator on the basis of such medical evidence as the Plan Administrator deems
warranted under the circumstances. Disability shall be deemed to constitute Permanent Disability in the event that such Disability is expected to result in death or has lasted or can be expected to last for a continuous period of twelve
(12) months or more. 
 H. Employee shall mean an individual who is in the employ of the Corporation (or any Parent or
Subsidiary), subject to the control and direction of the employer entity as to both the work to be performed and the manner and method of performance. 
 I. Exercise Date shall mean the date on which the option shall have been exercised in accordance with Paragraph 9 of the Agreement. 
  

 20 

 J. Exercise Price shall mean the exercise price payable per Option Share as specified in
the Grant Notice. 
 K. Expiration Date shall mean the date on which the option expires as specified in the Grant Notice.

 L. Fair Market Value per share of Common Stock on any relevant date shall be determined in accordance with the following
provisions: 
 (i) If the Common Stock is at the time traded on the Nasdaq National Market, then the Fair Market Value shall
be the closing selling price per share of Common Stock on the date in question, as the price is reported by the National Association of Securities Dealers on the Nasdaq National Market and published in The Wall Street Journal. If there is no
closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists. 
 (ii) If the Common Stock is at the time listed on any Stock Exchange, then the Fair Market Value shall be the closing selling price per
share of Common Stock on the date in question on the Stock Exchange determined by the Plan Administrator to be the primary market for the Common Stock, as such price is officially quoted in the composite tape of transactions on such exchange and
published in The Wall Street Journal. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

 (iii) If the Common Stock is at the time neither listed on any Stock Exchange nor traded on the Nasdaq National Market,
then the Fair Market Value shall be determined by the Plan Administrator after taking into account such factors as the Plan Administrator shall deem appropriate. 
 M. Grant Date shall mean the date of grant of the option as specified in the Grant Notice. 
 N. Grant Notice shall mean the Notice of Grant of Stock Option accompanying the Agreement, pursuant to which Optionee has been informed of the basic terms of the option evidenced hereby. 
 O. Incentive Option shall mean an option which satisfies the requirements of Code Section 422. 
 P. Misconduct shall mean the commission of any act of fraud, embezzlement or dishonesty by Optionee, any unauthorized use or disclosure by
Optionee of confidential information or trade secrets of the Corporation (or any Parent or Subsidiary), or any other intentional misconduct by Optionee adversely affecting the business or affairs of the Corporation (or any Parent or Subsidiary) in a
material manner. The foregoing definition shall not in any way 

  

 21 

 preclude or restrict the right of the Corporation (or any Parent or Subsidiary) to discharge or dismiss Optionee or any
other person in the Service of the Corporation (or any Parent or Subsidiary) for any other acts or omissions, but such other acts or omissions shall not be deemed, for purposes of the Plan or this Agreement, to constitute grounds for termination for
Misconduct. 
 Q. 1934 Act shall mean the Securities Exchange Act of 1934, as amended. 
 R. Non-Statutory Option shall mean an option not intended to satisfy the requirements of Code Section 422. 
 S. Option Shares shall mean the number of shares of Common Stock subject to the option. 
 T. Optionee shall mean the person to whom the option is granted as specified in the Grant Notice. 
 U. Parent shall mean any corporation (other than the Corporation) in an unbroken chain of corporations ending with the Corporation,
provided each corporation in the unbroken chain (other than the Corporation) owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other
corporations in such chain. 
 V. Plan shall mean the Corporation’s 2001 Stock Option/Stock Issuance Plan. 
 W. Plan Administrator shall mean either the Board or a committee of the Board acting in its capacity as administrator of the Plan.

 X. Purchase Agreement shall mean the stock purchase agreement in substantially the form of Exhibit B to the Grant Notice.

 Y. Service shall mean the Optionee’s performance of services for the Corporation (or any Parent or Subsidiary) in the
capacity of an Employee, a non-employee member of the board of directors or technical advisory board, or an independent consultant. 
 Z.
Stock Exchange shall mean the American Stock Exchange or the New York Stock Exchange. 
 AA. Subsidiary shall
mean any corporation (other than the Corporation) in an unbroken chain of corporations beginning with the Corporation, provided each corporation (other than the last corporation) in the unbroken chain owns, at the time of the determination, stock
possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain. 
 BB. Vesting Schedule shall mean the vesting schedule specified in the Grant Notice pursuant to which the Optionee is to vest in the Option Shares in a series of installments over his or her period of
Service. 
  

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 AELUROS, INC.  
 STOCK PURCHASE AGREEMENT 
 AGREEMENT made this
                     day of
                    ,              by and between Aeluros, Inc., a Delaware
corporation, and                     , Optionee under the Corporation’s 2001 Stock Option/Stock Issuance Plan. 
 All capitalized terms in this Agreement shall have the meaning assigned to them in this Agreement or in the attached Appendix. 
 A. EXERCISE OF OPTION 
 1.
Exercise. Optionee hereby purchases              shares of Common Stock (the “Purchased Shares”) pursuant to that certain option (the “Option”)
granted Optionee on             ,              (the “Grant Date”) to purchase up to
             shares of Common Stock (the “Option Shares”) under the Plan at the exercise price of
$             per share (the “Exercise Price”). 
 2.
Payment. Concurrently with the delivery of this Agreement to the Corporation, Optionee shall pay the Exercise Price for the Purchased Shares in accordance with the provisions of the Option Agreement and shall deliver whatever
additional documents may be required by the Option Agreement as a condition for exercise, together with a duly-executed blank Assignment Separate from Certificate (in the form attached hereto as Exhibit I) with respect to the Purchased Shares.

 3. Stockholder Rights. Until such time as the Corporation exercises the Repurchase Right or the First Refusal Right,
Optionee (or any successor in interest) shall have all the rights of a stockholder (including voting, dividend and liquidation rights) with respect to the Purchased Shares, subject, however, to the transfer restrictions of Articles B and C.

 B. SECURITIES LAW COMPLIANCE 
 1. Restricted Securities. The Purchased Shares have not been registered under the 1933 Act and are being issued to Optionee in reliance upon the exemption from such registration provided by SEC Rule 701
for stock issuances under compensatory benefit plans such as the Plan. Optionee hereby confirms that Optionee has been informed that the Purchased Shares are restricted securities under the 1933 Act and may not be resold or transferred unless the
Purchased Shares are first registered under the Federal securities laws or unless an exemption from such registration is available. Accordingly, Optionee hereby acknowledges that Optionee is prepared to hold the Purchased Shares for an indefinite
period and that Optionee is aware that SEC Rule 144 issued under the 1933 Act which exempts certain resales of unrestricted securities is not presently available to exempt the resale of the Purchased Shares from the registration requirements of the
1933 Act. 
 2. Restrictions on Disposition of Purchased Shares. Optionee shall make no disposition of the Purchased Shares
(other than a Permitted Transfer) unless and until there is compliance with all of the following requirements: 
 (i) Optionee
shall have provided the Corporation with a written summary of the terms and conditions of the proposed disposition. 
 (ii)
Optionee shall have complied with all requirements of this Agreement applicable to the disposition of the Purchased Shares. 
  

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 (iii) Optionee shall have provided the Corporation with written assurances, in form and
substance satisfactory to the Corporation, that (a) the proposed disposition does not require registration of the Purchased Shares under the 1933 Act or (b) all appropriate action necessary for compliance with the registration requirements
of the 1933 Act or any exemption from registration available under the 1933 Act (including Rule 144) has been taken. 
 The Corporation shall
not be required (i) to transfer on its books any Purchased Shares which have been sold or transferred in violation of the provisions of this Agreement or (ii) to treat as the owner of the Purchased Shares, or otherwise to
accord voting, dividend or liquidation rights to, any transferee to whom the Purchased Shares have been transferred in contravention of this Agreement. 
 3. Restrictive Legends. The stock certificates for the Purchased Shares shall be endorsed with one or more of the following restrictive legends: 
 “The shares represented by this certificate have not been registered under the Securities Act of 1933. The shares may not be sold
or offered for sale in the absence of (a) an effective registration statement for the shares under such Act, (b) a “no action” letter of the Securities and Exchange Commission with respect to such sale or offer or
(c) satisfactory assurances to the Corporation that registration under such Act is not required with respect to such sale or offer.” 
 “The shares represented by this certificate are subject to certain repurchase rights and rights of first refusal granted to the Corporation and accordingly may not be sold, assigned, transferred, encumbered,
or in any manner disposed of except in conformity with the terms of a written agreement dated                     ,
                     between the Corporation and the registered holder of the shares (or the predecessor in interest to the shares). A copy of
such agreement is maintained at the Corporation’s principal corporate offices.” 
 C. TRANSFER RESTRICTIONS

 1. Restriction on Transfer. Except for any Permitted Transfer, Optionee shall not transfer, assign, encumber or otherwise
dispose of any of the Purchased Shares which are subject to the Repurchase Right. In addition, Purchased Shares which are released from the Repurchase Right shall not be transferred, assigned, encumbered or otherwise disposed of in contravention of
the First Refusal Right or the Market Stand-Off. 
 2. Transferee Obligations. Each person (other than the Corporation) to whom
the Purchased Shares are transferred by means of a Permitted Transfer must, as a condition precedent to the validity of such transfer, acknowledge in writing to the Corporation that such person is bound by the provisions of this Agreement and that
the transferred shares are subject to (i) the Repurchase Right, (ii) the First Refusal Right and (iii) the Market Stand-Off, to the same extent such shares would be so subject if retained by Optionee. 
 3. Market Stand-Off. 
 (a) In connection with any underwritten public offering by the Corporation of its equity securities pursuant to an effective registration statement filed under the 1933 Act, including the Corporation’s initial public offering, Owner
shall not sell, make any short sale of, loan, hypothecate, pledge, grant any option for the purchase of, or otherwise dispose or transfer for value or otherwise agree to engage in any of the foregoing transactions with respect to, any Purchased
Shares without the prior written consent of the Corporation or its underwriters. Such restriction (the “Market Stand-Off”) shall be in effect for such period of time from and after the effective date of the final prospectus for the
offering as may be requested by the Corporation or such underwriters. In no event, however, shall such period exceed one hundred eighty (180) days, and the Market Stand-Off shall in no’ event be applicable to any underwritten public
offering effected more than two (2) years after the effective date of the Corporation’s initial public offering. 
  

 24 

 (b) Owner shall be subject to the Market Stand-Off provided and only if the
officers and directors of the Corporation are also subject to similar restrictions. 
 (c) Any new, substituted or additional
securities which are by reason of any Recapitalization or Reorganization distributed with respect to the Purchased Shares shall be immediately subject to the Market Stand-Off, to the same extent the Purchased Shares are at such time covered by such
provisions. 
 (d) In order to enforce the Market Stand-Off, the Corporation may impose stop-transfer instructions with
respect to the Purchased Shares until the end of the applicable stand-off period. 
 D. REPURCHASE RIGHT 
 1. Grant. The Corporation is hereby granted the right (the “Repurchase Right”), exercisable at any time during the sixty (60)-day
period following the date Optionee ceases for any reason to remain in Service or (if later) during the sixty (60)-day period following the execution date of this Agreement, to repurchase at the Exercise Price any or all of the Purchased Shares in
which Optionee is not, at the time of his or her cessation of Service, vested in accordance with the Vesting Schedule applicable to those shares or the special vesting acceleration provisions of Paragraph D.6 of this Agreement (such shares to be
hereinafter referred to as the “Unvested Shares”). 
 2. Exercise of the Repurchase Right. The Repurchase Right shall
be exercisable by written notice delivered to each Owner of the Unvested Shares prior to the expiration of the sixty (60)-day exercise period. The notice shall indicate the number of Unvested Shares to be repurchased and the date on which the
repurchase is to be effected, such date to be not more than thirty (30) days after the date of such notice. The certificates representing the Unvested Shares to be repurchased shall be delivered to the Corporation on the closing date specified
for the repurchase. Concurrently with the receipt of such stock certificates, the Corporation shall pay to Owner, in cash or cash equivalents (including the cancellation of any purchase-money indebtedness), an amount equal to the Exercise Price
previously paid for the Unvested Shares which are to be repurchased from Owner. 
 3. Termination of the Repurchase Right. The
Repurchase Right shall terminate with respect to any Unvested Shares for which it is not timely exercised under Paragraph D.2. In addition, the Repurchase Right shall terminate and cease to be exercisable with respect to any and all Purchased Shares
in which Optionee vests in accordance with the Vesting Schedule. All Purchased Shares as to which the Repurchase Right lapses shall, however, remain subject to (i) the First Refusal Right and (ii) the Market Stand-Off. 
 4. Aggregate Vesting Limitation. If the Option is exercised in more than one increment so that Optionee is a party to one or more other
Stock Purchase Agreements (the “Prior Purchase Agreements”) which are executed prior to the date of this Agreement, then the total number of Purchased Shares as to which Optionee shall be deemed to have a fully-vested interest under this
Agreement and all Prior Purchase Agreements shall not exceed in the aggregate the number of Purchased Shares in which Optionee would otherwise at the time be vested, in accordance with the Vesting Schedule, had all the Purchased Shares (including
those acquired under the Prior Purchase Agreements) been acquired exclusively under this Agreement. 
 5. Recapitalization. Any
new, substituted or additional securities or other property (including cash paid other than as a regular cash dividend) which is by reason of any Recapitalization distributed with respect to the Purchased Shares shall be immediately subject to the
Repurchase Right and any escrow requirements hereunder, but only to the extent the Purchased Shares are at the time covered by such right or escrow requirements. Appropriate adjustments to reflect such distribution shall be made to the number and/or
class of Purchased Shares subject to this Agreement and to the price per share to be paid upon the exercise of the Repurchase Right in order to reflect the effect of any such Recapitalization upon the Corporation’s capital structure;
provided, however, that the aggregate purchase price shall remain the same. 
  

 25 

 6. Corporate Transaction. 
 (a) The Repurchase Right shall automatically terminate in its entirety, and all the Purchased Shares shall vest in full, immediately prior
to the consummation of any Corporate Transaction, except to the extent the Repurchase Right is to be assigned to the successor entity in such Corporate Transaction. 
 (b) To the extent the Repurchase Right remains in effect following a Corporate Transaction, such right shall apply to any new securities
or other property (including any cash payments) received in exchange for the Purchased Shares in consummation of the Corporate Transaction, but only to the extent the Purchased Shares are at the time covered by such right. Appropriate adjustments
shall be made to the price per share payable upon exercise of the Repurchase Right to reflect the effect of the Corporate Transaction upon the Corporation’s capital structure; provided, however, that the aggregate purchase price shall
remain the same. The new securities or other property (including any cash payments) issued or distributed with respect to the Purchased Shares in consummation of the Corporate Transaction shall be immediately deposited in escrow with the Corporation
(or the successor entity) and shall not be released from escrow until Optionee vests in such securities or other property in accordance with the same Vesting Schedule in effect for the Purchased Shares. 
 E. RIGHT OF FIRST REFUSAL 
 1.
Grant. The Corporation is hereby granted the right of first refusal (the “First Refusal Right”), exercisable in connection with any proposed transfer of the Purchased Shares in which Optionee has vested in accordance with the
provisions of Article D. For purposes of this Article E, the term “transfer” shall include any sale, assignment, pledge, encumbrance or other disposition of the Purchased Shares intended to be made by Owner, but shall not include any
Permitted Transfer. 
 2. Notice of Intended Disposition. In the event any Owner of Purchased Shares in which Optionee has
vested desires to accept a bona fide third-party offer for the transfer of any or all of such shares (the Purchased Shares subject to such offer to be hereinafter referred to as the “Target Shares”), Owner shall promptly (i) deliver
to the Corporation written notice (the “Disposition Notice”) of the terms of the offer, including the purchase price and the identity of the third-party offeror, and (ii) provide satisfactory proof that the disposition of the Target
Shares to such third-party offeror would not be in contravention of the provisions set forth in Articles B and C. 
 3. Exercise of the
First Refusal Right. The Corporation shall, for a period of twenty-five (25) days following receipt of the Disposition Notice, have the right to repurchase any or all of the Target Shares subject to the Disposition Notice upon the same
terms as those specified therein or upon such other terms (not materially different from those specified in the Disposition Notice) to which Owner consents. Such right shall be exercisable by delivery of written notice (the “Exercise
Notice”) to Owner prior to the expiration of the twenty-five (25)-day exercise period. If such right is exercised with respect to all the Target Shares, then the Corporation shall effect the repurchase of such shares, including payment of the
purchase price, not more than five (5) business days after delivery of the Exercise Notice; and at such time the certificates representing the Target Shares shall be delivered to the Corporation. 
 Should the purchase price specified in the Disposition Notice be payable in property other than cash or evidences of indebtedness, the Corporation shall
have the right to pay the purchase price in the form of cash equal in amount to the value of such property. If Owner and the Corporation cannot agree on such cash value within ten (10) days after the Corporation’s receipt of the
Disposition Notice, the valuation shall be made by an appraiser of recognized standing selected by Owner and the Corporation or, if they cannot agree on an appraiser within twenty (20) days after the Corporation’s receipt of the
Disposition Notice, each shall select an appraiser of recognized standing and the two (2) appraisers shall designate a third appraiser of recognized standing, whose appraisal shall be determinative of such value. The cost of such appraisal
shall be shared equally by Owner and the Corporation. The closing shall then be held on the later of (i) the fifth (5th) business day following delivery of the Exercise Notice or (ii) the fifth (5th) business day after
such valuation shall have been made. 
 4. Non-Exercise of the First Refusal Right. In the event the Exercise Notice is not
given to Owner prior to the expiration of the twenty-five (25)-day exercise period, Owner shall have a period of thirty (30)

  

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days thereafter in which to sell or otherwise dispose of the Target Shares to the third-party offeror identified in the Disposition Notice upon terms
(including the purchase price) no more favorable to such third-party offeror than those specified in the Disposition Notice; provided, however, that any such sale or disposition must not be effected in contravention of the provisions of
Articles B and C. The third-party offeror shall acquire the Target Shares subject to the First Refusal Right and the provisions and restrictions of Article B and Paragraph C.3, and any subsequent disposition of the acquired shares must be effected
in compliance with the terms and conditions of such First Refusal Right and the provisions and restrictions of Article B and Paragraph C.3. In the event Owner does not effect such sale or disposition of the Target Shares within the specified thirty
(30)-day period, the First Refusal Right shall continue to be applicable to any subsequent disposition of the Target Shares by Owner until such right lapses. 
 5. Partial Exercise of the First Refusal Right. In the event the Corporation makes a timely exercise of the First Refusal Right with respect to a portion, but not all, of the Target Shares specified in
the Disposition Notice, Owner shall have the option, exercisable by written notice to the Corporation delivered within five (5) business days after Owner’s receipt of the Exercise Notice, to effect the sale of the Target Shares pursuant to
either of the following alternatives: 
 (i) sale or other disposition of all the Target Shares to the third-party offeror
identified in the Disposition Notice, but in full compliance with the requirements of Paragraph E.4, as if the Corporation did not exercise the First Refusal Right; or 
 (ii) sale to the Corporation of the portion of the Target Shares which the Corporation has elected to purchase, such sale to be effected
in substantial conformity with the provisions of Paragraph E.3. The First Refusal Right shall continue to be applicable to any subsequent disposition of the remaining Target Shares until such right lapses. 
 Owner’s failure to deliver timely notification to the Corporation shall be deemed to be an election by Owner to sell the Target Shares pursuant to
alternative (i) above. 
 6. Recapitalization/Reorganization. 
 (a) Any new, substituted or additional securities or other property which is by reason of any Recapitalization distributed with respect to
the Purchased Shares shall be immediately subject to the First Refusal Right, but only to the extent the Purchased Shares are at the time covered by such right. 
 (b) In the event of a Reorganization, the First Refusal Right shall remain in full force and effect and shall apply to the new capital
stock or other property received in exchange for the Purchased Shares in consummation of the Reorganization, but only to the. extent the Purchased Shares are at the time covered by such right. 
 7. Lapse. The First Refusal Right shall lapse upon the earliest to occur of (i) the first date on which shares of the Common
Stock are held of record by more than five hundred (500) persons, (ii) a determination made by the Board that a public market exists for the outstanding shares of Common Stock or (iii) a firm commitment underwritten public offering,
pursuant to an effective registration statement under the 1933 Act, covering the offer and sale of the Common Stock in the aggregate amount of at least twenty million dollars ($20,000,000). However, the Market Stand-Off shall continue to remain in
full force and effect following the lapse of the First Refusal Right. 
 F. SPECIAL TAX ELECTION 
 The acquisition of the Purchased Shares may result in adverse tax consequences which may be avoided or mitigated by filing an election under Code Section 83(b).
Such election must be filed within thirty (30) days after the date of this Agreement. A description of the tax consequences applicable to the acquisition of the Purchased Shares and the form for making the Code Section 83(b) election are
set forth in Exhibit II. OPTIONEE SHOULD CONSULT 

  

 27 

 
WITH HIS OR HER TAX ADVISOR TO DETERMINE THE TAX CONSEQUENCES OF ACQUIRING THE PURCHASED SHARES AND THE ADVANTAGES AND DISADVANTAGES OF FILING THE CODE
SECTION 83(b) ELECTION. OPTIONEE ACKNOWLEDGES THAT IT IS OPTIONEE’S SOLE RESPONSIBILITY, AND NOT THE CORPORATION’S, TO FILE A TIMELY ELECTION UNDER CODE SECTION 83(b), EVEN IF OPTIONEE REQUESTS THE CORPORATION OR ITS REPRESENTATIVES TO
MAKE THIS FILING ON HIS OR HER BEHALF. 
 G. GENERAL PROVISIONS 
 1. Assignment. The Corporation may assign the Repurchase Right and/or the First Refusal Right to any person or entity selected by the
Board, including (without limitation) one or more stockholders of the Corporation. 
 2. At Will Employment. Nothing in this
Agreement or in the Plan shall confer upon Optionee any right to continue in Service for any period of specific duration or interfere with or otherwise restrict in any way the rights of the Corporation (or any Parent or Subsidiary employing or
retaining Optionee) or of Optionee, which rights are hereby expressly reserved by each, to terminate Optionee’s Service at any time for any reason, with or without cause. 
 3. Notices. Any notice required to be given under this Agreement shall be in writing and shall be deemed effective upon personal delivery
or upon deposit in the U.S. mail, registered or certified, postage prepaid and properly addressed to the party entitled to such notice at the address indicated below such party’s signature line on this Agreement or at such other address as such
party may designate by ten (10) days advance written notice under this paragraph to all other parties to this Agreement. 
 4. No
Waiver. The failure of the Corporation in any instance to exercise the Repurchase Right or the First Refusal Right shall not constitute a waiver of any other repurchase rights and/or rights of first refusal that may subsequently arise under
the provisions of this Agreement or any other agreement between the Corporation and Optionee. No waiver of any breach or condition of this Agreement shall be deemed to be a waiver of any other or subsequent breach or condition, whether of like or
different nature. 
 5. Cancellation of Shares. If the Corporation shall make available, at the time and place and in the
amount and form provided in this Agreement, the consideration for the Purchased Shares to be repurchased in accordance with the provisions of this Agreement, then from and after such time, the person from whom such shares are to be repurchased shall
no longer have any rights as a holder of such shares (other than the right to receive payment of such consideration in accordance with this Agreement). Such shares shall be deemed purchased in accordance with the applicable provisions hereof, and
the Corporation shall be deemed the owner and holder of such shares, whether or not the certificates therefor have been delivered as required by this Agreement. 
 H. MISCELLANEOUS PROVISIONS 
 1. Optionee Undertaking. Optionee hereby agrees to
take whatever additional action and execute whatever additional documents the Corporation may deem necessary or advisable in order to carry out or effect one or more of the obligations or restrictions imposed on either Optionee or the Purchased
Shares pursuant to the provisions of this Agreement. 
 2. Agreement is Entire Contract. This Agreement constitutes the entire
contract between the parties hereto with regard to the subject matter hereof. This Agreement is made pursuant to the provisions of the Plan and shall in all respects be construed in conformity with the terms of the Plan. 
 3. Governing Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of California without resort
to that State’s conflict-of-laws rules. 
  

 28 

 4. Counterparts. This Agreement may be executed in counterparts, each of which shall be
deemed to be an original, but all of which together shall constitute one and the same instrument. 
 5. Successors and Assigns.
The provisions of this Agreement shall inure to the benefit of, and be binding upon, the Corporation and its successors and assigns and upon Optionee, Optionee’s permitted assigns and the legal representatives, heirs and legatees of
Optionee’s estate, whether or not any such person shall have become a party to this Agreement and have agreed in writing to join herein and be bound by the terns hereof. 
  

 29 

 IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year first indicated
above. 
  

			
	AELUROS, INC.
		
	 By:
	 	 
		
	 Title:
	 	 
		
	 Address:  
	 	 
		
		 	 
		
		 	 
		
		 	 
		 	OPTIONEE
		
	 Address:
	 	 
		
		 	 

  

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