EX-10.1





 EXHIBIT 10.1 

II-VI INCORPORATED 

2018 EMPLOYEE STOCK PURCHASE PLAN 

1. Definitions. 
 (a)
“Administrator” means the Committee or, subject to Applicable Law, one or more of the Company’s officers or management team appointed by the Board or Committee to administer the day-to-day operations of the Plan. Except as otherwise provided in the Plan, the Board or Committee may assign any of its administrative tasks to the Administrator. 

(b) “Affiliate” will have the meaning ascribed to such term in Rule 12b-2 promulgated under
the Exchange Act. The Board will have the authority to determine the time or times at which “Affiliate” status is determined within the foregoing definition. 

(c) “Applicable Law” means the requirements relating to the administration of equity-based awards under state corporate laws, United
States federal and state securities laws, the Code, the rules of any stock exchange or quotation system on which the Common Stock is listed or quoted and the applicable laws of any non-U.S. jurisdiction where
rights are, or will be, granted under the Plan. 
 (d) “Board” means the Board of Directors of the Company. 

(e) “Change in Control” means the occurrence of any of the following events: 

(i) the consummation of any merger or consolidation as a result of which the Common Stock shall be changed, converted or exchanged (other than
a merger with a wholly owned subsidiary of the Company) or any liquidation of the Company or any sale or other disposition of all or substantially all of the assets of the Company; 

(ii) the consummation of any merger or consolidation to which the Company is a party as a result of which the “persons” (as that
term is used in Sections 13(d) and 14(d)(2) of the Exchange Act) who were stockholders of the Company immediately prior to the effective date of the merger or consolidation shall have beneficial ownership of less than a majority of the combined
voting power for election of directors of the surviving corporation following the effective date of such merger or consolidation or 
 (iii)
any “person” (as defined above) is or becomes the “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Company representing
fifty percent (50%) or more of the combined voting power of the Company’s then-outstanding securities in a transaction or series of transactions not approved by the Board. 

(f) “Code” means the United States Internal Revenue Code of 1986, as amended. Reference to a specific section of the Code or United
States Treasury Regulation thereunder will include such section or regulation, any valid regulation or other official applicable guidance promulgated under such section, and any comparable provision of any future legislation or regulation amending,
supplementing or superseding such section or regulation. 
 (g) “Committee” means the Compensation Committee of the Board or any
subcommittee referred to in Section 4(e). 
 (h) “Common Stock” means the common stock, no par value, of the Company, as the
same may be converted, changed, reclassified or exchanged. 
 (i) “Company” means II-VI
Incorporated, a Pennsylvania corporation, or any successor to all or substantially all of the Company’s business that adopts the Plan. 

(j) “Contributions” means the amount of Eligible Pay contributed by a Participant through payroll deductions or other payments that
the Committee may permit a Participant to make to fund the exercise of rights to purchase Shares granted pursuant to the Plan. 
 (k)
“Designated Company” means any Parent, Subsidiary or Affiliate, whether now existing or existing in the future, that has been designated by the Committee from time to time in its sole discretion as eligible to participate in the


  
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Plan. The Committee may designate any Parent, Subsidiary or Affiliate as a Designated Company in a Non-423 Offering. For purposes of a Section 423
Offering, only the Company and any Parent or Subsidiary may be Designated Companies; provided, however, that at any given time, a Parent or Subsidiary that is a Designated Company under a Section 423 Offering will not be a Designated Company
under a Non-423 Offering. 
 (l) “Effective Date” means the date the Plan is approved by
the Board, subject to stockholder approval as provided in Section 18 hereof. 
 (m) “Eligible Employee” means any individual
in an employee-employer relationship with the Company or a Designated Company for income tax and employment tax withholding and reporting purposes. For purposes of clarity, the term “Eligible Employee” will not include the following,
regardless of any subsequent reclassification as an employee by the Company or a Designated Company, any governmental agency, or any court: (i) any independent contractor; (ii) any consultant; (iii) any individual performing services
for the Company or a Designated Company who has entered into an independent contractor or consultant agreement with the Company or a Designated Company; (iv) any individual performing services for the Company or a Designated Company under a
purchase order, a supplier agreement or any other agreement that the Company or a Designated Company enters into for services; (v) any individual classified by the Company or a Designated Company as contract labor (such as contractors, contract
employees, job shoppers), regardless of length of service; (vi) any individual whose base wage or salary is not processed for payment by the payroll department(s) or payroll provider(s) of the Company or a Designated Company; and (vii) any
leased employee. The Committee will have exclusive discretion to determine whether an individual is an Eligible Employee for purposes of the Plan. 

(n) “Eligible Pay” means “Qualified Wages” as defined by the applicable Company policy for the Participant’s
jurisdiction and approved for use under the Plan by the Committee or as modified by the Committee in its sole discretion with respect to any Offering Period. Except as otherwise defined by an applicable Company policy or determined by the Committee,
“Eligible Pay” for an Offering Period includes only wages and base salary received during such Offering Period by an Eligible Employee for services to the employer and excludes cash bonuses, commissions, stipends, lump sum payments in lieu
of foregone merit increases, “bonus buyouts” as the result of job changes, pension, retainers, severance pay, special stay-on bonus, income derived from stock options, stock appreciation rights,
restricted stock units and dispositions of stock acquired thereunder, any other allowances, and any other special remuneration or variable pay. 

(o) “Enrollment Period” means the period during which an Eligible Employee may elect to participate in the Plan, with such period
occurring before the first day of each Offering Period, as prescribed by the Administrator. 
 (p) “Exchange Act” means the United
States Securities Exchange Act of 1934, as amended, from time to time, or any successor law thereto, and the regulations promulgated thereunder. 

(q) “Fair Market Value” means, as of any given date, (i) the closing sales price for the Common Stock on the applicable date as
quoted on the Nasdaq National Market or, if no sale occurred on such date, the closing price reported for the first Trading Day immediately prior to such date during which a sale occurred; or (ii) if the Common Stock is not traded on an
exchange but is regularly quoted on a national market or other quotation system, the closing sales price on such date as quoted on such market or system, or if no sales occurred on such date, then on the date immediately prior to such date on which
sales prices are reported; or (iii) in the absence of an established market for the Common Stock of the type described in (i) or (ii) of this Section 1(q), the fair market value established by the Committee acting in good faith. 

(r) “Offering” means a Section 423 Offering or a Non-423 Offering of a right to purchase
Shares under the Plan during an Offering Period as further described in Section 6. Unless otherwise determined by the Committee, each Offering under the Plan in which Eligible Employees of one or more Designated Companies may participate will
be deemed a separate offering for purposes of Section 423 of the Code, even if the dates of the applicable Offering Periods of each such Offering are identical, and the provisions of the Plan will separately apply to each Offering. With respect
to Section 423 Offerings, the terms of separate Offerings need not be identical provided that all Eligible Employees granted purchase rights in a particular Offering will have the same rights and privileges, except as otherwise may be permitted
by Code Section 423; a Non-423 Offering need not satisfy such requirements. 
 (s)
“Offering Period” means the periods established in accordance with Section 6 during which rights to purchase Shares may be granted pursuant to the Plan and Shares may be purchased on one or more Purchase Dates. The duration and timing
of Offering Periods may be changed pursuant to Sections 6 and 17. 
 (t) “Parent” means a “parent corporation,” whether
now or hereafter existing, as defined in Section 424(e) of the Code. 

  
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 (u) “Participant” means an Eligible Employee who elects to participate in the
Plan. 
 (v) “Plan” means the II-VI Incorporated, 2018 Employee Stock Purchase Plan, as may
be amended from time to time. 
 (w) “Purchase Date” means the last Trading Day of each Purchase Period (or such other Trading Day
as the Committee may determine). 
 (x) “Purchase Period” means a period of time within an Offering Period, as may be specified by
the Committee in accordance with Section 6, generally beginning on the first Trading Day of each Offering Period and ending on a Purchase Date. An Offering Period may consist of one or more Purchase Periods. 

(y) “Purchase Price” means the purchase price at which Shares may be acquired on a Purchase Date and which will be set by the
Committee; provided, however, that the Purchase Price for a Section 423 Offering will not be less than eighty-five percent (85%) of the lesser of (i) the Fair Market Value of the Shares on the first Trading Day of the Offering Period or
(ii) the Fair Market Value of the Shares on the Purchase Date. Unless otherwise determined by the Committee prior to the commencement of an Offering Period, the Purchase Price will be ninety percent (90%) of the lesser of (a) the Fair
Market Value of the Shares on the first Trading Day of the Offering Period or (b) the Fair Market Value of the Shares on the Purchase Date. 

(z) “Shares” means the shares of Common Stock. 

(aa) “Subsidiary” means a “subsidiary corporation,” whether now or hereafter existing, as defined in Section 424(f) of
the Code. 
 (bb) “Tax-Related Items” means any income tax, social insurance, payroll tax,
payment on account or other tax-related items arising in relation to the Participant’s participation in the Plan. 

(cc) “Trading Day” means a day on which the principal exchange that Shares are listed on is open for trading. 

2. Purpose of the Plan. The purpose of the Plan is to provide an opportunity for Eligible Employees of the Company and its Designated
Companies to purchase Common Stock at a discount through voluntary Contributions, thereby attracting, retaining and rewarding such persons and strengthening the mutuality of interest between such persons and the Company’s stockholders. The
Company intends for offerings under the Plan to qualify as an “employee stock purchase plan” under Section 423 of the Code (each, a “Section 423 Offering”); provided, however, that the Committee may also authorize the
grant of rights under offerings of the Plan that are not intended to comply with the requirements of Section 423 of the Code, pursuant to any rules, procedures, agreements, appendices, or sub-plans
adopted by the Committee for such purpose (each, a “Non-423 Offering”). 
 3. Number of
Reserved Shares. Subject to adjustment pursuant to Section 16 hereof, 2,000,000 Shares may be sold pursuant to the Plan. Such Shares may be authorized but unissued Shares, treasury Shares or Shares purchased in the open market. For
avoidance of doubt, up to the maximum number of Shares reserved under this Section 3 may be used to satisfy purchases of Shares under Section 423 Offerings and any remaining portion of such maximum number of Shares may be used to
satisfy purchases of Shares under Non-423 Offerings. 
 4. Administration of the Plan. 

(a) Committee as Administrator. The Plan will be administered by the Committee. Notwithstanding anything in the Plan to the contrary,
subject to Applicable Law, any authority or responsibility that, under the terms of the Plan, may be exercised by the Committee may alternatively be exercised by the Board. Subject to Applicable Law, no member of the Board or Committee (or its
delegates) will be liable for any good faith action or determination made in connection with the operation, administration or interpretation of the Plan. In the performance of its responsibilities with respect to the Plan, the Committee will be
entitled to rely upon, and no member of the Committee will be liable for any action taken or not taken in reliance upon, information and/or advice furnished by the Company’s officers or employees, the Company’s accountants, the
Company’s counsel and any other party that the Committee deems necessary. 
 (b) Powers of the Committee. The Committee will have
full power and authority to: administer the Plan, including, without limitation, the authority to (i) construe, interpret, reconcile any inconsistency in, correct any default in and supply any omission in, and apply the terms of the Plan and
any enrollment form or other instrument or agreement relating to 

  
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the Plan, (ii) determine eligibility and adjudicate all disputed claims filed under the Plan, including whether Eligible Employees will participate in a Section 423 Offering or a Non-423 Offering and which Subsidiaries and Affiliates of the Company (or Parent, if applicable) will be Designated Companies participating in either a Section 423 Offering or a
Non-423 Offering, (iii) determine the terms and conditions of any right to purchase Shares under the Plan, (iv) establish, amend, suspend or waive such rules and regulations and appoint such agents
as it deems appropriate for the proper administration of the Plan, (v) amend an outstanding right to purchase Shares, including any amendments to a right that may be necessary for purposes of effecting a transaction contemplated under
Section 16 hereof (including, but not limited to, an amendment to the class or type of stock that may be issued pursuant to the exercise of a right or the Purchase Price applicable to a right), provided that the amended right otherwise conforms
to the terms of the Plan, and (vi) make any other determination and take any other action that the Committee deems necessary or desirable for the administration of the Plan including, without limitation, the adoption of such any rules,
procedures, agreements, appendices, or sub-plans (collectively, “Sub-Plans”) as are necessary or appropriate to permit the participation in the Plan by
employees who are foreign nationals or employed outside the United States, as further set forth in Section 4(c) below. 
 (c) Non-U.S. Sub-Plans. Notwithstanding any provision to the contrary in this Plan, the Committee may adopt such Sub-Plans relating to
the operation and administration of the Plan to accommodate local laws, customs and procedures for jurisdictions outside of the United States, the terms of which Sub-Plans may take precedence over other
provisions of this Plan, with the exception of Section 3 hereof, but unless otherwise superseded by the terms of such Sub-Plan, the provisions of this Plan will govern the operation of such Sub-Plan. To the extent inconsistent with the requirements of Section 423, any such Sub-Plan will be considered part of a Non-423
Offering, and purchase rights granted thereunder will not be required by the terms of the Plan to comply with Section 423 of the Code. Without limiting the generality of the foregoing, the Committee is authorized to adopt Sub-Plans for particular non-U.S. jurisdictions that modify the terms of the Plan to meet applicable local requirements, customs or procedures regarding, without limitation,
(i) eligibility to participate, (ii) the definition of Eligible Pay, (iii) the dates and duration of Offering Periods or other periods during which Participants may make Contributions towards the purchase of Shares, (iv) the
method of determining the Purchase Price and the discount from Fair Market Value at which Shares may be purchased, (v) any minimum or maximum amount of Contributions a Participant may make in an Offering Period or other specified period under
the applicable Sub-Plan, (vi) the treatment of purchase rights upon a Change in Control or a change in capitalization of the Company, (vii) the handling of payroll deductions,
(viii) establishment of bank, building society or trust accounts to hold Contributions, (ix) payment of interest, (x) conversion of local currency, (xi) obligations to pay payroll tax, (xii) determination of beneficiary
designation requirements, (xiii) withholding procedures and (xiv) handling of Share issuances. 
 (d) Binding Authority. All
determinations by the Committee in carrying out and administering the Plan and in construing and interpreting the Plan and any enrollment form or other instrument or agreement relating to the Plan will be made in the Committee’s sole discretion
and will be final, binding and conclusive for all purposes and upon all interested persons. 
 (e) Delegation of Authority. To the
extent not prohibited by Applicable Law, the Committee may, from time to time, delegate some or all of its authority under the Plan to a subcommittee or subcommittees of the Committee, the Administrator or other persons or groups of persons as it
deems necessary, appropriate or advisable under conditions or limitations that it may set at or after the time of the delegation. For purposes of the Plan, reference to the Committee will be deemed to refer to any subcommittee, subcommittees, or
other persons or groups of persons to whom the Committee delegates authority pursuant to this Section 4(e). 
 5. Eligible
Employees. 
 (a) General. Any individual who is an Eligible Employee as of the commencement of an Offering Period will be eligible to
participate in the Plan, subject to the requirements of Section 7. 
 (b) Non-U.S. Employees. An
Eligible Employee who works for a Designated Company and is a citizen or resident of a jurisdiction other than the United States (without regard to whether such individual also is a citizen or resident of the United States or is a resident alien
(within the meaning of Section 7701(b)(1)(A) of the Code)) may be excluded from participation in the Plan or an Offering if the participation of such Eligible Employee is prohibited under the laws of the applicable jurisdiction or if complying
with the laws of the applicable jurisdiction would cause the Plan or a Section 423 Offering to violate Section 423 of the Code. In the case of a Non-423 Offering, an Eligible Employee (or group of
Eligible Employees) may be excluded from participation in the Plan or an Offering if the Administrator has determined, in its sole discretion, that participation of such Eligible Employee(s) is not advisable or practicable for any reason. 

(c) Limitations. Notwithstanding any provisions of the Plan to the contrary, no Eligible Employee will be


  
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granted a right to purchase Shares under a Section 423 Offering (i) to the extent that, immediately after the grant, such Eligible Employee (or any other person whose stock would be
attributed to such Eligible Employee pursuant to Section 424(d) of the Code) would own capital stock of the Company and/or hold outstanding rights to purchase capital stock possessing five percent (5%) or more of the total combined voting power
or value of all classes of the capital stock of the Company or of any Parent or Subsidiary of the Company, or (ii) to the extent that his or her rights to purchase capital stock under all employee stock purchase plans of the Company and any
Parent and Subsidiaries accrues at a rate that exceeds Twenty-Five Thousand Dollars (US$25,000) worth of such stock (determined at the fair market value of the shares of such stock at the time such right is granted) for each calendar year in which
such purchase right is outstanding. The Committee, in its discretion, from time to time may, prior to an Enrollment Period for all purchase rights to be granted in an Offering, determine (on a uniform and nondiscriminatory basis for Section 423
Offerings) that the definition of Eligible Employee will or will not include an individual if he or she: (i) has not completed at least two (2) years of service since his or her last hire date (or such lesser period of time as may be
determined by the Committee in its discretion), (ii) customarily works not more than twenty (20) hours per week (or such lesser period of time as may be determined by the Committee in its discretion), (iii) customarily works not more than five
(5) months per calendar year (or such lesser period of time as may be determined by the Committee in its discretion), (iv) is a highly compensated employee within the meaning of Section 414(q) of the Code, or (v) is a highly
compensated employee within the meaning of Section 414(q) of the Code with compensation above a certain level or who is an officer or subject to the disclosure requirements of Section 16(a) of the Exchange Act, provided the exclusion is
applied with respect to each Section 423 Offering in an identical manner to all highly compensated individuals of the Designated Company whose employees are participating in that Offering. 

6. Offering Periods. The Plan will be implemented by consecutive Offering Periods with a new Offering Period commencing on the first
Trading Day of the relevant Offering Period and terminating on the last Trading Day of the relevant Offering Period. Unless and until the Committee determines otherwise in its discretion, each Offering Period will consist of one
(1) approximately six (6)-month Purchase Period, which will run simultaneously with the Offering Period. Unless otherwise provided by the Committee, Offering Periods will run from February 1st (or the first Trading Day thereafter) through July
31st (or the first Trading Day prior to such date) and from August 1st (or the first Trading Day thereafter) through January 31st (or the first Trading Day prior to such date). The Committee has authority to establish additional or alternative
sequential or overlapping Offering Periods, a different number of Purchase Periods within an Offering Period, a different duration for one or more Offering Periods or Purchase Periods or different commencement or ending dates for such Offering
Periods with respect to future offerings without stockholder approval if such change is announced prior to the scheduled beginning of the first Offering Period to be affected thereafter, provided, however, that no Offering Period may have a duration
exceeding twenty-seven (27) months. To the extent that the Committee establishes additional or overlapping Offering Periods, the Committee will have discretion to structure an Offering Period so that if the Fair Market Value of a share of
Common Stock on the first Trading Day of the Offering Period in which a Participant is currently enrolled is higher than the Fair Market Value of a share of Common Stock on the first Trading Day of any subsequent Offering Period, the Company will
automatically enroll such Participant in the subsequent Offering Period and will terminate his or her participation in such original Offering Period. 

7. Election to Participate and Payroll Deductions. An Eligible Employee may elect to participate in an Offering Period under the Plan
during any Enrollment Period. Any such election will be made by completing the online enrollment process through the Company’s designated Plan broker or by completing and submitting an enrollment form to the Administrator during such Enrollment
Period, authorizing Contributions in whole percentages from one percent (1%) to fifteen percent (15%) of the Eligible Employee’s Eligible Pay for the Purchase Period within the Offering Period to which the deduction applies. A Participant may
elect to increase or decrease the rate of such Contributions during any subsequent Enrollment Period by submitting the appropriate form online through the Company’s designated Plan broker or to the Administrator, provided that no change in
Contributions will be permitted to the extent that such change would result in total Contributions exceeding fifteen percent (15%) of the Eligible Employee’s Eligible Pay, or such other maximum amount as may be determined by the Administrator.
During a Purchase Period, a Participant may not change his or her rate of Contributions, with the exception that the Participant may reduce his or her rate of Contributions to zero percent (0%), to become effective as soon as possible after
completing an amended enrollment form (either through the Company’s online Plan enrollment process or by submitting the appropriate form to the Administrator). If a Participant reduces his or her rate of Contributions to zero percent (0%)
during an Offering Period, the Contributions made by the Participant prior to such reduction will be applied to the purchase of Shares on the next Purchase Date, but if the Participant does not increase such rate of Contributions above zero percent
(0%) prior to the commencement of the next subsequent Offering Period under the Plan, such action will be treated as the Participant’s withdrawal from the Plan in accordance with Section 14 hereof. Once an Eligible Employee elects to
participate in an Offering Period, then such Participant will automatically participate in the Offering Period commencing immediately following the last day of such prior Offering Period at the same contribution level as was in effect in the prior
Offering Period unless the Participant elects to increase or decrease the rate of Contributions or withdraws or is deemed to withdraw from this Plan as described above in this Section 7. A Participant that is automatically enrolled in a
subsequent Offering Period pursuant to this Section 7 is not required to file any additional documentation in order to continue participation 

  
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in the Plan. The Administrator has the authority to change the foregoing rules set forth in this Section 7 regarding participation in the Plan. 

8. Contributions. The Company will establish an account in the form of a bookkeeping entry for each Participant for the purpose of
tracking Contributions made by each Participant during the Offering Period, and will credit all Contributions made by each Participant to such account. The Company will not be obligated to segregate the Contributions from the general funds of the
Company or any Designated Company nor will any interest be paid on such Contributions, unless otherwise determined by the Administrator or required by Applicable Law. All Contributions received by the Company for Shares sold by the Company on any
Purchase Date pursuant to this Plan may be used for any corporate purpose. 
 9. Limitation on Number of Shares That an Employee May
Purchase. Subject to the limitations set forth in Section 5(c), each Participant will have the right to purchase as many whole Shares as may be purchased with the Contributions credited to his or her account as of the last day of the
Offering Period (or such other date as the Committee may determine) at the Purchase Price applicable to such Offering Period; provided, however, that a Participant may not purchase in excess of 5,000 Shares under the Plan per Offering Period or such
other maximum number of Shares as may be established for an Offering Period by the Committee (in each case subject to adjustment pursuant to Section 16 hereof). Any amount remaining in a Participant’s account that was not applied to the
purchase of Shares on a Purchase Date because it was not sufficient to purchase a whole Share will be carried forward for the purchase of Shares on the next following Purchase Date. However, any amounts not applied to the purchase of Shares during
an Offering Period for any reason other than as described in the foregoing sentence shall be promptly refunded following such Purchase Date and will not be carried forward to any subsequent Offering Period. 

10. Taxes. At the time a Participant’s purchase right is exercised, in whole or in part, or at the time a Participant disposes of
some or all of the Shares acquired under the Plan, the Participant will make adequate provision for any Tax-Related Items. In their sole discretion, and except as otherwise determined by the Committee, the
Company or the Designated Company that employs the Participant may satisfy their obligations to withhold Tax-Related Items by (a) withholding from the Participant’s wages or other compensation,
(b) withholding a sufficient whole number of Shares otherwise issuable following purchase having an aggregate Fair Market Value sufficient to pay the Tax-Related Items required to be withheld with respect
to the Shares, or (c) withholding from proceeds from the sale of Shares issued upon purchase, either through a voluntary sale or a mandatory sale arranged by the Company. 

11. Brokerage Accounts or Plan Share Accounts. By enrolling in the Plan, each Participant will be deemed to have authorized the
establishment of a brokerage account on his or her behalf at a securities brokerage firm selected by the Administrator. Alternatively, the Administrator may provide for Plan share accounts for each Participant to be established by the Company or by
an outside entity selected by the Administrator which is not a brokerage firm. Shares purchased by a Participant pursuant to the Plan will be held in the Participant’s brokerage or Plan share account. The Company may require that Shares be
retained in such brokerage or Plan share account for a designated period of time, and/or may establish procedures to permit tracking of dispositions of Shares. 

12. Rights as a Stockholder. A Participant will have no rights as a stockholder with respect to Shares subject to any rights granted
under this Plan or any Shares deliverable under this Plan unless and until recorded in the books of the brokerage firm selected by the Administrator or, as applicable, the Company, its transfer agent, stock plan administrator or such other outside
entity which is not a brokerage firm. 
 13. Rights Not Transferable. Rights granted under this Plan are not transferable by a
Participant other than by will or the laws of descent and distribution, and are exercisable during a Participant’s lifetime only by the Participant. 

14. Withdrawals. A Participant may withdraw from an Offering Period by submitting the appropriate form online through the
Company’s designated Plan broker or to the Administrator. A notice of withdrawal must be received no later than the last day of the month immediately preceding the month of the Purchase Date or by such other deadline as may be prescribed by the
Administrator. Upon receipt of such notice, automatic deductions of Contributions on behalf of the Participant will be discontinued commencing with the payroll period immediately following the effective date of the notice of withdrawal, and such
Participant will not be eligible to participate in the Plan until the next Enrollment Period. Unless otherwise determined by the Administrator, amounts credited to the contribution account of any Participant who withdraws prior to the date set forth
in this Section 14 will be refunded, without interest, as soon as practicable. 
 15. Termination of Employment. 

(a) General. Upon a Participant ceasing to be an Eligible Employee for any reason prior to a Purchase Date, Contributions for such
Participant will be discontinued and any amounts then credited to the Participant’s contribution account 

  
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will be refunded, without interest, as soon as practicable, except as otherwise determined by the Administrator. 

(b) Leave of Absence. Subject to the discretion of the Administrator, if a Participant is granted a paid leave of absence, payroll
deductions on behalf of the Participant will continue and any amounts credited to the Participant’s contribution account may be used to purchase Shares as provided under the Plan. If a Participant is granted an unpaid leave of absence, payroll
deductions on behalf of the Participant will be discontinued and no other Contributions will be permitted (unless otherwise determined by the Administrator or required by Applicable Law), but any amounts then credited to the Participant’s
contribution account may be used to purchase Shares on the next applicable Purchase Date. Where the period of leave exceeds three (3) months and the Participant’s right to reemployment is not guaranteed by statute or by contract, the
employment relationship will be deemed to have terminated three (3) months and one (1) day following the commencement of such leave. 

(c) Transfer of Employment. Unless otherwise determined by the Administrator, a Participant whose employment transfers or whose
employment terminates with an immediate rehire (with no break in service) by or between the Company or a Designated Company will not be treated as having terminated employment for purposes of participating in the Plan or an Offering; however, if a
Participant transfers from a Section 423 Offering to a Non-423 Offering, the exercise of the Participant’s purchase right will be qualified under the Section 423 Offering only to the extent that
such exercise complies with Section 423 of the Code. If a Participant transfers from a Non-423 Offering to a Section 423 Offering, the exercise of the Participant’s purchase right will remain
nonqualified under the Non-423 Offering. 
 16. Adjustment Provisions. 

(a) Changes in Capitalization. In the event of any change affecting the number, class, value, or terms of the shares of Common Stock
resulting from a recapitalization, stock split, reverse stock split, stock dividend, spinoff, split up, combination, reclassification or exchange of Shares, merger, consolidation, rights offering, separation, reorganization or liquidation or any
other change in the corporate structure or Shares, including any extraordinary dividend or extraordinary distribution (but excluding any regular cash dividend), then the Committee, in order to prevent dilution or enlargement of the benefits or
potential benefits intended to be made available under the Plan, will, in such manner as it may deem equitable, adjust the number and class of Common Stock that may be delivered under the Plan (including the numerical limits of Sections 3 and 9),
the Purchase Price per Share and the number of shares of Common Stock covered by each right under the Plan that has not yet been exercised. For the avoidance of doubt, the Committee may not delegate its authority to make adjustments pursuant to this
Section. Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any class, will affect, and no adjustment by reason thereof will be made with respect to, the
number or price of Shares subject to a purchase right. 
 (b) Change in Control. In the event of a Change in Control, each outstanding
right to purchase Shares will be equitably adjusted and assumed or an equivalent right to purchase Shares substituted by the successor corporation or a parent or subsidiary of the successor corporation. In the event that the successor corporation in
a Change in Control refuses to assume or substitute for the purchase right or the successor corporation is not a publicly traded corporation, the Offering Period then in progress will be shortened by setting a New Purchase Date and will end on the
New Purchase Date. The New Purchase Date will be before the date of the Company’s proposed Change in Control. The Committee will notify each Participant in writing, at least ten (10) Trading Days prior to the New Purchase Date, that the
Purchase Date for the Participant’s purchase right has been changed to the New Purchase Date and that Shares will be purchased automatically for the Participant on the New Purchase Date, unless prior to such date the Participant has withdrawn
from the Offering Period, as provided in Section 14 hereof. 
 17. Amendments and Termination of the Plan. The Board or the
Committee may amend the Plan at any time, provided that, if stockholder approval is required pursuant to Applicable Law, then no such amendment will be effective unless approved by the Company’s stockholders within such time period as may be
required. The Board may suspend the Plan or discontinue the Plan at any time, including shortening an Offering Period in connection with a spin-off or other similar corporate event. Upon termination of the
Plan, all Contributions will cease and all amounts then credited to a Participant’s account will be equitably applied to the purchase of whole Shares then available for sale, and any remaining amounts will be promptly refunded, without
interest, to Participants. For the avoidance of doubt, the Board or Committee, as applicable herein, may not delegate its authority to make amendments to or suspend the operations of the Plan pursuant to this Section. 

18. Stockholder Approval; Effective Date. The Plan will be subject to approval by the stockholders of the Company within twelve
(12) months after the date the Plan is adopted by the Board. Such stockholder approval will be obtained in the manner and to the degree required under Applicable Laws. The Plan will become effective on the Effective Date, subject to approval of
the stockholders of the Company as contemplated in the foregoing sentence. For the avoidance of doubt, the Board may not delegate its authority to approve the Plan pursuant to this Section. 

  
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 19. Conditions Upon Issuance of Shares. Notwithstanding any other provision of the
Plan, unless there is an available exemption from any registration, qualification or other legal requirement applicable to the Shares, the Company will not be required to deliver any Shares issuable upon exercise of a right under the Plan prior to
the completion of any registration or qualification of the Shares under any local, state, federal or foreign securities or exchange control law or under rulings or regulations of any governmental regulatory body, or prior to obtaining any approval
or other clearance from any local, state, federal or foreign governmental agency, which registration, qualification or approval the Committee will, in its absolute discretion, deem necessary or advisable. The Company is under no obligation to
register or qualify the Shares with any state or foreign securities commission, or to seek approval or clearance from any governmental authority for the issuance or sale of the Shares. If, pursuant to this Section 19, the Committee determines
that the Shares will not be issued to any Participant, any Contributions credited to such Participant’s account will be promptly refunded, without interest, to the Participant, without any liability to the Company or any of its Subsidiaries or
Affiliates (or any Parent, if applicable). 
 20. Code Section 409A; Tax Qualification. 

Code Section 409A. Rights to purchase Shares granted under a Section 423 Offering are exempt from the
application of Section 409A of the Code and rights to purchase Shares granted under a Non-423 Offering are intended to be exempt from Section 409A of the Code pursuant to the “short-term
deferral” exemption contained therein. In furtherance of the foregoing and notwithstanding any provision in the Plan to the contrary, if the Committee determines that a right granted under the Plan may be subject to Section 409A of the
Code or that any provision in the Plan would cause a right under the Plan to be subject to Section 409A of the Code, the Committee may amend the terms of the Plan and/or of an outstanding right granted under the Plan, or take such other action
the Committee determines is necessary or appropriate, in each case, without the Participant’s consent, to exempt any outstanding right or future right that may be granted under the Plan from or to allow any such rights to comply with
Section 409A of the Code, but only to the extent any such amendments or action by the Committee would not violate Section 409A of the Code. Notwithstanding the foregoing, the Company will have no liability to a Participant or any other
party if the right to purchase Shares under the Plan that is intended to be exempt from or compliant with Section 409A of the Code is not so exempt or compliant or for any action taken by the Committee with respect thereto. The Company makes no
representation that the right to purchase Shares under the Plan is compliant with Section 409A of the Code. 
 Tax
Qualification. Although the Company may endeavor to (i) qualify a right to purchase Shares for favorable tax treatment under the laws of the United States or jurisdictions outside of the United States or (ii) avoid adverse tax
treatment (e.g., under Section 409A of the Code), the Company makes no representation to that effect and expressly disavows any covenant to maintain favorable or avoid unfavorable tax treatment, notwithstanding anything to the contrary in this
Plan, including Section 20(a) hereof. The Company will be unconstrained in its corporate activities without regard to the potential negative tax impact on Participants under the Plan. 

21. No Employment Rights. Participation in the Plan will not be construed as giving any Participant the right to be retained as an
employee of the Company, its Subsidiary, or one of its Affiliates or Parent, as applicable. Furthermore, the Company, a Subsidiary, or an Affiliate (or Parent, if applicable) may dismiss any Participant from employment at any time, free from any
liability or any claim under the Plan. 
 22. Governing Law; Choice of Forum. Except to the extent that provisions of this Plan are
governed by applicable provisions of the Code or any other substantive provision of United States federal law, this Plan will be governed by and construed in accordance with the internal laws of the Commonwealth of Pennsylvania without giving effect
to the conflict of laws principles thereof. The Company and each Participant, as a condition to such Participant’s participation in the Plan, hereby irrevocably submit to the exclusive jurisdiction of any state or U.S. federal court located in
Allegheny County, Pennsylvania over any suit, action or proceeding arising out of or relating to or concerning the Plan. The Company and each Participant, as a condition to such Participant’s participation in the Plan, acknowledge that the
forum designated by this Section 22 has a reasonable relation to the Plan and to the relationship between such Participant and the Company. Notwithstanding the foregoing, nothing in the Plan will preclude the Company from bringing any action or
proceeding in any other court for the purpose of enforcing the provisions of this Section 22. The agreement by the Company and each Participant as to forum is independent of the law that may be applied in the action, and the Company and each
Participant, as a condition to such Participant’s participation in the Plan, (i) agree to such forum even if the forum may under applicable law choose to apply non-forum law, (ii) hereby waive,
to the fullest extent permitted by applicable law, any objection which the Company or such Participant now or hereafter may have to personal jurisdiction or to the laying of venue of any such suit, action or proceeding in any court referred to in
this Section 22, (iii) undertake not to commence any action arising out of or relating to or concerning the Plan in any forum other than the forum described in this Section 22 and (iv) agree that, to the fullest extent permitted by
applicable law, a final and non-appealable judgment in any such suit, action or proceeding in any such court will be conclusive and binding upon the Company and each Participant. 

  
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 23. Waiver of Jury Trial. Each Participant waives any right it may have to trial by
jury in respect of any litigation based on, arising out of, under or in connection with the Plan. 
 24. Headings. Headings are given
to the sections and subsections of the Plan solely as a convenience to facilitate reference. Such headings will not be deemed in any way material or relevant to the construction or interpretation of the Plan. 

25. Expenses. Unless otherwise set forth in the Plan or determined by the Administrator, all expenses of administering the Plan,
including expenses incurred in connection with the purchase of Shares for sale to Participants, will be borne by the Company and its Subsidiaries or Affiliates (or any Parent, if applicable). 

 

  
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