Document:

NetScout Systems, Inc. 2011 Employee Stock Purchase Plan

 Exhibit 10.1 
 NETSCOUT SYSTEMS, INC. 
 AMENDED AND RESTATED 2011 EMPLOYEE STOCK PURCHASE PLAN 

ADOPTED BY THE BOARD OF DIRECTORS:
JUNE 29, 2011 
 APPROVED BY THE
STOCKHOLDERS: SEPTEMBER 7, 2011 
 AMENDED AND
RESTATED BY THE COMPENSATION COMMITTEE: FEBRUARY 8, 2012 
  

	1.	GENERAL. 

(a) This Plan is intended as the successor to the NetScout Systems, Inc. 1999 Employee Stock Purchase Plan (the “Prior
Plan”). Following the Effective Date of this Plan, no additional options to purchase shares of Common Stock shall be granted under the Prior Plan. All Purchase Rights granted on or after the Effective Date of this Plan shall be subject
to the terms of this Plan. 
 (b) The purpose of the Plan is to provide a means by which Eligible Employees of the
Company and certain Designated Companies may be given an opportunity to purchase shares of Common Stock. The Plan is intended to permit the Company to grant a series of Purchase Rights to Eligible Employees. 

(c) The Company, by means of the Plan, seeks to retain the services of such Employees, to secure and retain the services of new
Employees and to provide incentives for such persons to exert maximum efforts for the success of the Company, its Related Corporations and Affiliates. 
 (d) This Plan includes two components: a 423 Component and a Non-423 Component. It is the intention of the Company to have the 423 Component qualify as an Employee Stock Purchase Plan. The
provisions of the 423 Component, accordingly, shall be construed so as to extend and limit participation in a uniform and nondiscriminatory basis consistent with the requirements of Section 423 of the Code. In addition, this Plan authorizes the
grant of Purchase Rights under the Non-423 Component that does not qualify as an Employee Stock Purchase Plan; such Purchase Rights shall be granted pursuant to rules, procedures or subplans adopted by the Board designed to achieve tax, securities
laws or other objectives for Eligible Employees and the Company, its Related Corporations and Affiliates. Except as otherwise provided herein or determined by the Board, the Non-423 Component will operate and be administered in the same manner as
the 423 Component 
 (e) If a Participant transfers employment from the Company or any Designated Related Corporation
participating in the 423 Component to a Designated Affiliate participating in the Non-423 Component, he or she shall immediately cease to participate in the 423 Component; however, any Contributions made for the Purchase Period in which such
transfer occurs shall be transferred to the Non-423 Component, and such Participant shall immediately join the then current Offering under the Non-423 Component upon the same terms and conditions in effect for his or her participation in the Plan,
except for such modifications as may be required by applicable law. A Participant who transfers employment from a Designated Affiliate participating in the Non-423 Component to the Company or any Designated Related Corporation participating in the
423 Component shall remain a Participant in the Non-423 

  
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Component until the earlier of (i) the end of the current Offering Period under the Non-423 Component, or (ii) the Offering Date of the first Offering in which he or she participates
following such transfer. 
  

	2.	ADMINISTRATION. 

 (a) The Board shall administer the Plan unless and until the Board delegates administration of the Plan to a Committee or Committees, as provided in Section 2(c). 

(b) The Board shall have the power, subject to, and within the limitations of, the express provisions of the Plan: 

(i) To determine how and when Purchase Rights to purchase shares of Common Stock shall be granted and the provisions of each
Offering of such Purchase Rights (which need not be identical), including which Designated Related Corporations and Designated Affiliates shall participate in the 423 Component or the Non-423 Component. 

(ii) To designate from time to time which Related Corporations and Affiliates of the Company shall be eligible to participate in
the Plan as Designated Related Corporations and Designated Affiliates. 
 (iii) To construe and interpret the Plan and
Purchase Rights, and to establish, amend and revoke rules and regulations for its administration. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the Plan, in a manner and to the extent it shall deem
necessary or expedient to make the Plan fully effective. 
 (iv) To settle all controversies regarding the Plan and
Purchase Rights granted under it. 
 (v) To suspend or terminate the Plan at any time as provided in Section 12.

 (vi) To amend the Plan at any time as provided in Section 12. 

(vii) Generally, to exercise such powers and to perform such acts as it deems necessary or expedient to promote the best interests
of the Company, its Related Corporations and Affiliates and to carry out the intent that the 423 Component be treated as an Employee Stock Purchase Plan. 
 (viii) To adopt such procedures and sub-plans as are necessary or appropriate to permit participation in the Plan by Employees who are foreign nationals or employed outside the United States.
Without limiting the generality of the foregoing, the Board specifically is authorized to adopt rules, procedures and subplans, which, for purposes of the Non-423 Component, may be outside the scope of Section 423 of the Code, regarding,
without limitation, eligibility to participate in the Plan, handling and making of Contributions, establishment of bank or trust accounts to hold Contributions, payment of interest, conversion of local currency, obligations to pay payroll tax,
determination of beneficiary designation requirements, withholding procedures and handling of share issuances, which may vary according to local requirements. 

  
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 (ix) To make any other determination and take any other action that the Board deems
necessary or desirable for the administration of the Plan. 
 (c) The Board may delegate some or all of the
administration of the Plan to a Committee or Committees. If administration is delegated to a Committee, the Committee shall have, in connection with the administration of the Plan, the powers theretofore possessed by the Board that have been
delegated to the Committee, including the power to delegate to a subcommittee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board shall thereafter be to the Committee or subcommittee),
subject, however, to such resolutions, not inconsistent with the provisions of the Plan, as may be adopted from time to time by the Board. The Board may retain the authority to concurrently administer the Plan with the Committee and may, at any
time, revest in the Board some or all of the powers previously delegated. Whether or not the Board has delegated administration of the Plan to a Committee, the Board shall have the final power to determine all questions of policy and expediency that
may arise in the administration of the Plan. 
 (d) All determinations, interpretations and constructions made by the
Board in good faith shall not be subject to review by any person and shall be final, binding and conclusive on all persons. 
  

	3.	SHARES OF COMMON STOCK SUBJECT TO THE PLAN.

 (a) Subject to the provisions of Section 11(a) relating to Capitalization Adjustments, the
shares of Common Stock that may be sold pursuant to Purchase Rights shall not exceed in the aggregate 2,500,000 shares of Common Stock. 
 (b) If any Purchase Right granted under the Plan shall for any reason terminate without having been exercised, the shares of Common Stock not purchased under such Purchase Right shall again become
available for issuance under the Plan. 
 (c) The stock purchasable under the Plan shall be shares of authorized but
unissued or reacquired Common Stock, including shares repurchased by the Company on the open market. 
  

	4.	GRANT OF PURCHASE RIGHTS; OFFERING. 

(a) The Board may from time to time grant or provide for the grant of Purchase Rights to purchase shares of Common Stock under the
Plan to Eligible Employees in an Offering (consisting of one or more Purchase Periods) on an Offering Date or Offering Dates selected by the Board. Each Offering shall be in such form and shall contain such terms and conditions as the Board shall
deem appropriate, and with respect to the 423 Component shall comply with the requirement of Section 423(b)(5) of the Code that all Employees granted Purchase Rights shall have the same rights and privileges. The terms and conditions of an
Offering shall be incorporated by reference into the Plan and treated as part of the Plan. The provisions of separate Offerings need not be identical, but each Offering shall include (through incorporation of the provisions of this Plan by reference
in the document comprising the Offering or otherwise) the period during which the Offering shall be effective, which period shall not exceed 27 months beginning with the Offering Date, and the substance of the provisions contained in Sections 5
through 8, inclusive. 

  
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 (b) If a Participant has more than one Purchase Right outstanding under the Plan,
unless he or she otherwise indicates in agreements or notices delivered hereunder: (i) each agreement or notice delivered by that Participant shall be deemed to apply to all of his or her Purchase Rights under the Plan, and (ii) a Purchase
Right with a lower exercise price (or an earlier-granted Purchase Right, if different Purchase Rights have identical exercise prices) shall be exercised to the fullest possible extent before a Purchase Right with a higher exercise price (or a
later-granted Purchase Right if different Purchase Rights have identical exercise prices) shall be exercised. 
 (c) The
Board shall have the discretion to structure an Offering so that if the Fair Market Value of a share of Common Stock on the first day of a new Purchase Period within that Offering is less than or equal to the Fair Market Value of a share of Common
Stock on the Offering Date for that Offering, then (i) that Offering shall terminate immediately, and (ii) the Participants in such terminated Offering shall be automatically enrolled in a new Offering beginning on the first day of such
new Purchase Period. 
  

	5.	ELIGIBILITY. 

 (a) Purchase Rights may be granted only to Employees of the Company or, as the Board may designate as provided in Section 2(b), to Employees of a Related Corporation or Affiliate. Except as
provided in Section 5(b), an Employee shall not be eligible to be granted Purchase Rights under the Plan unless, on the Offering Date, such Employee has been in the employ of the Company, the Related Corporation or the Affiliate, as the case
may be, for such continuous period preceding such Offering Date as the Board may require, but in no event shall the required period of continuous employment be greater than two years. In addition, the Board may provide that no Employee shall be
eligible to be granted Purchase Rights under the Plan unless, on the Offering Date, such Employee’s customary employment with the Company or the Related Corporation or the Affiliate is more than 20 hours per week and more than five months per
calendar year for purposes of the 423 Component or such other criteria as the Board may determine consistent with Section 423 of the Code. 
 (b) The Board may provide that each person who, during the course of an Offering, first becomes an Eligible Employee shall, on a date or dates specified in the Offering which coincides with the day
on which such person becomes an Eligible Employee or which occurs thereafter, receive a Purchase Right under that Offering, which Purchase Right shall thereafter be deemed to be a part of that Offering. Such Purchase Right shall have the same
characteristics as any Purchase Rights originally granted under that Offering, as described herein, except that: 
 (i)
the date on which such Purchase Right is granted shall be the “Offering Date” of such Purchase Right for all purposes, including determination of the exercise price of such Purchase Right; 

(ii) the period of the Offering with respect to such Purchase Right shall begin on its Offering Date and end coincident with the
end of such Offering; and 

  
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 (iii) the Board may provide that if such person first becomes an Eligible Employee
within a specified period of time before the end of the Offering, he or she shall not receive any Purchase Right under that Offering. 
 (c) No Employee shall be eligible for the grant of any Purchase Rights under the 423 Component if, immediately after any such Purchase Rights are granted, such Employee owns stock possessing 5% or
more of the total combined voting power or value of all classes of stock of the Company or of any Related Corporation. For purposes of this Section 5(c), the rules of Section 424(d) of the Code shall apply in determining the stock
ownership of any Employee, and stock which such Employee may purchase under all outstanding Purchase Rights and options shall be treated as stock owned by such Employee. 
 (d) As specified by Section 423(b)(8) of the Code, an Eligible Employee participating in the 423 Component may be granted Purchase Rights under the Plan only if such Purchase Rights, together
with any other rights granted under all Employee Stock Purchase Plans of the Company and any Related Corporations, do not permit such Eligible Employee’s rights to purchase stock of the Company or any Related Corporation to accrue at a rate
which exceeds $25,000 of Fair Market Value of such stock (determined at the time such rights are granted, and which, with respect to the Plan, shall be determined as of their respective Offering Dates) for each calendar year in which such rights are
outstanding at any time. 
 (e) Officers of the Company and any Designated Company, if they are otherwise Eligible
Employees, shall be eligible to participate in Offerings under the Plan. Notwithstanding the foregoing, the Board may provide in an Offering under the 423 Component that Employees who are highly compensated Employees within the meaning of
Section 423(b)(4)(D) of the Code shall not be eligible to participate. 
  

	6.	PURCHASE RIGHTS; PURCHASE PRICE. 

(a) On each Offering Date, each Eligible Employee, pursuant to an Offering made under the Plan, shall be granted a Purchase Right
to purchase up to that number of shares of Common Stock purchasable either with a percentage or with a maximum dollar amount, as designated by the Board, but in either case not exceeding 20% of such Employee’s earnings (as defined by the Board
in each Offering) during the period that begins on the Offering Date (or such later date as the Board determines for a particular Offering) and ends on the date stated in the Offering, which date shall be no later than the end of the Offering.

 (b) The Board shall establish one or more Purchase Dates during an Offering as of which Purchase Rights granted
pursuant to that Offering shall be exercised and purchases of shares of Common Stock shall be carried out in accordance with such Offering. 
 (c) In connection with each Offering made under the Plan, the Board may specify a maximum number of shares of Common Stock that may be purchased by any Participant on any Purchase Date during such
Offering. In connection with each Offering made under the Plan, the Board may specify a maximum aggregate number of shares of Common Stock that may be purchased by all Participants pursuant to such Offering. In addition, in connection with each
Offering that contains more than one Purchase Date, the Board may specify a maximum 

  
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aggregate number of shares of Common Stock that may be purchased by all Participants on any Purchase Date under the Offering. If the aggregate purchase of shares of Common Stock issuable upon
exercise of Purchase Rights granted under the Offering would exceed any such maximum aggregate number, then, in the absence of any Board action otherwise, a pro rata allocation of the shares of Common Stock available shall be made in as nearly a
uniform manner as shall be practicable and equitable. 
 (d) The purchase price of shares of Common Stock acquired
pursuant to Purchase Rights shall be not less than the lesser of: 
 (i) an amount equal to 85% of the Fair Market Value
of the shares of Common Stock on the Offering Date; or 
 (ii) an amount equal to 85% of the Fair Market Value of the
shares of Common Stock on the applicable Purchase Date. 
  

	7.	PARTICIPATION; WITHDRAWAL; TERMINATION. 

(a) An Eligible Employee may elect to authorize payroll deductions pursuant to an Offering under the Plan by completing and
delivering to the Company, within the time specified in the Offering, an enrollment form (in such form as the Company may provide). Each such enrollment form shall authorize an amount of Contributions expressed as a percentage of the submitting
Participant’s earnings (as defined in each Offering) during the Offering (not to exceed the maximum percentage specified by the Board). Each Participant’s Contributions shall be credited to a bookkeeping account for such Participant under
the Plan and shall be deposited with the general funds of the Company except where applicable law requires that Contributions be deposited with a third party. To the extent provided in the Offering, a Participant may begin such Contributions after
the beginning of the Offering. To the extent provided in the Offering, a Participant may thereafter reduce (including to zero) or increase his or her Contributions. To the extent required under applicable law or if specifically provided in the
Offering, in addition to or instead of making Contributions by payroll deductions, a Participant may make Contributions through the payment by cash or check prior to each Purchase Date of the Offering. 

(b) During an Offering, a Participant may cease making Contributions and withdraw from the Offering by delivering to the Company a
notice of withdrawal in such form as the Company may provide. Such withdrawal may be elected at any time prior to the end of the Offering, except as provided otherwise in the Offering. Upon such withdrawal from the Offering by a Participant, the
Company shall distribute to such Participant all of his or her accumulated Contributions (reduced to the extent, if any, such Contributions have been used to acquire shares of Common Stock for the Participant) under the Offering, and such
Participant’s Purchase Right in that Offering shall thereupon terminate. A Participant’s withdrawal from an Offering shall have no effect upon such Participant’s eligibility to participate in any other Offerings under the Plan, but
such Participant shall be required to deliver a new enrollment form in order to participate in subsequent Offerings. 
 (c)
Unless otherwise required by applicable law, Purchase Rights granted pursuant to any Offering under the Plan shall terminate immediately upon a Participant ceasing to be an 

  
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Employee for any reason or for no reason or other lack of eligibility. The Company shall distribute to such terminated or otherwise ineligible Employee all of his or her accumulated Contributions
(reduced to the extent, if any, such Contributions have been used to acquire shares of Common Stock for the terminated or otherwise ineligible Employee) under the Offering. 
 (d) Purchase Rights shall not be transferable by a Participant except by will, the laws of descent and distribution, or by a beneficiary designation as provided in Section 10. During a
Participant’s lifetime, Purchase Rights shall be exercisable only by such Participant. 
 (e) Unless otherwise
specified in an Offering, the Company shall have no obligation to pay interest on Contributions, unless otherwise required by applicable law. 
  

	8.	EXERCISE OF PURCHASE RIGHTS. 

(a) On each Purchase Date during an Offering, each Participant’s accumulated Contributions shall be applied to the purchase of
shares of Common Stock up to the maximum number of shares of Common Stock permitted pursuant to the terms of the Plan and the applicable Offering, at the purchase price specified in the Offering. No fractional shares shall be issued upon the
exercise of Purchase Rights unless specifically provided for in the Offering. 
 (b) If any amount of accumulated
Contributions remains in a Participant’s account after the purchase of shares of Common Stock and such remaining amount is less than the amount required to purchase one share of Common Stock on the final Purchase Date of an Offering, then such
remaining amount shall be held in such Participant’s account for the purchase of shares of Common Stock under the next Offering under the Plan, unless such Participant withdraws from such next Offering, as provided in Section 7(b), or is
not eligible to participate in such Offering, as provided in Section 5, in which case such amount shall be distributed to such Participant after the final Purchase Date, without interest (unless otherwise required by applicable law). If the
amount of Contributions remaining in a Participant’s account after the purchase of shares of Common Stock is at least equal to the amount required to purchase one whole share of Common Stock on the final Purchase Date of the Offering, then such
remaining amount shall be distributed in full to such Participant at the end of the Offering without interest (unless otherwise required by applicable law. 
 (c) No Purchase Rights may be exercised to any extent unless the shares of Common Stock to be issued upon such exercise under the Plan are covered by an effective registration statement pursuant to
the Securities Act and the Plan is in material compliance with all applicable federal, state, foreign and other securities and other laws applicable to the Plan. If on a Purchase Date during any Offering hereunder the shares of Common Stock are not
so registered or the Plan is not in such compliance, no Purchase Rights or any Offering shall be exercised on such Purchase Date, and the Purchase Date shall be delayed until the shares of Common Stock are subject to such an effective registration
statement and the Plan is in such compliance, except that the Purchase Date shall not be delayed more than 12 months and the Purchase Date shall in no event be more than 27 months from the Offering Date. If, on the Purchase Date under any Offering
hereunder, as delayed to the maximum extent permissible, the shares of Common Stock are not registered and the Plan is not in such compliance, no Purchase Rights shall be exercised and all Contributions accumulated during the Offering (reduced to
the extent, if any, such Contributions have been used to acquire shares of Common Stock) shall be distributed to the Participants without interest. 

  
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	9.	COVENANTS OF THE COMPANY. 

The Company shall seek to obtain from each federal, state, foreign or other regulatory commission or agency having jurisdiction over the
Plan such authority as may be required to issue and sell shares of Common Stock upon exercise of the Purchase Rights. If, after commercially reasonable efforts, the Company is unable to obtain from any such regulatory commission or agency the
authority that counsel for the Company deems necessary for the lawful issuance and sale of Common Stock under the Plan, and at a commercially reasonable cost, the Company shall be relieved from any liability for failure to issue and sell Common
Stock upon exercise of such Purchase Rights unless and until such authority is obtained. 
  

	10.	DESIGNATION OF BENEFICIARY. 

 (a) A Participant may file a written designation of a beneficiary who is to receive any shares of Common Stock and/or cash, if any, from the Participant’s account under the Plan in the event
of such Participant’s death subsequent to the end of an Offering but prior to delivery to the Participant of such shares of Common Stock or cash. In addition, a Participant may file a written designation of a beneficiary who is to receive any
cash from the Participant’s account under the Plan in the event of such Participant’s death during an Offering. Any such designation shall be on a form provided by or otherwise acceptable to the Company. 

(b) The Participant may change such designation of beneficiary at any time by written notice to the Company. In the event of the
death of a Participant and in the absence of a beneficiary validly designated under the Plan who is living at the time of such Participant’s death, the Company shall deliver such shares of Common Stock and/or cash to the executor or
administrator of the estate of the Participant, or if no such executor or administrator has been appointed (to the knowledge of the Company), the Company, in its sole discretion, may deliver such shares of Common Stock and/or cash to the spouse or
to any one or more dependents or relatives of the Participant, or if no spouse, dependent or relative is known to the Company, then to such other person as the Company may designate. 

 

	11.	ADJUSTMENTS UPON CHANGES IN COMMON STOCK; CORPORATE
TRANSACTIONS. 

 (a) In the event of a Capitalization Adjustment, the Board shall
appropriately and proportionately adjust: (i) the class(es) and maximum number of securities subject to the Plan pursuant to Section 3(a), (ii) the class(es) and number of securities subject to, and the purchase price applicable to
outstanding Offerings and Purchase Rights, and (iii) the class(es) and number of securities that are the subject of purchase limits under each ongoing Offering. The Board shall make such adjustments, and its determination shall be final,
binding and conclusive. 
 (b) In the event of a Corporate Transaction, then: (i) any surviving corporation or
acquiring corporation (or the surviving or acquiring corporation’s parent company) may assume or continue Purchase Rights outstanding under the Plan or may substitute similar rights (including a right to acquire the same consideration paid to
the stockholders in the Corporate Transaction) for those outstanding under the Plan, or (ii) if any surviving or acquiring 

  
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corporation (or its parent company) does not assume or continue such Purchase Rights or does not substitute similar rights for Purchase Rights outstanding under the Plan, then the
Participants’ accumulated Contributions shall be used to purchase shares of Common Stock within ten business days prior to the Corporate Transaction under any ongoing Offerings, and the Participants’ Purchase Rights under the ongoing
Offerings shall terminate immediately after such purchase. 
  

	12.	AMENDMENT, TERMINATION OR SUSPENSION OF THE PLAN.

 (i) The Board may amend the Plan at any time in any respect the Board deems necessary or advisable.
However, except as provided in Section 11(a) relating to Capitalization Adjustments, stockholder approval shall be required for any amendment of the Plan for which stockholder approval is required by applicable law or listing requirements,
including any amendment that either (i) materially increases the number of shares of Common Stock available for issuance under the Plan, (ii) materially expands the class of individuals eligible to become Participants and receive Purchase
Rights under the Plan, (iii) materially increases the benefits accruing to Participants under the Plan or materially reduces the price at which shares of Common Stock may be purchased under the Plan, (iv) materially extends the term of the
Plan, or (v) expands the types of awards available for issuance under the Plan, but in each of (i) through (v) above only to the extent stockholder approval is required by applicable law or listing requirements. 

(b) The Board may suspend or terminate the Plan at any time. No Purchase Rights may be granted under the Plan while the Plan is
suspended or after it is terminated. 
 (c) Any benefits, privileges, entitlements and obligations under any outstanding
Purchase Rights granted before an amendment, suspension or termination of the Plan shall not be impaired by any such amendment, suspension or termination except (i) with the consent of the person to whom such Purchase Rights were granted,
(ii) as necessary to comply with any laws, listing requirements, or governmental regulations (including, without limitation, the provisions of Section 423 of the Code and the regulations and other interpretive guidance issued thereunder
relating to Employee Stock Purchase Plans) including without limitation any such regulations or other guidance that may be issued or amended after the Effective Date, or (iii) as necessary to obtain or maintain favorable tax, listing, or
regulatory treatment. 
  

	13.	CODE SECTION 409A; TAX QUALIFICATION. 

(a) Purchase Rights granted under the 423 Component are exempt from the application of Section 409A of the Code. Purchase
Rights granted under the Non-423 Component to U.S. taxpayers are intended to be exempt from the application of Section 409A of the Code under the short-term deferral exception and any ambiguities shall be construed and interpreted in accordance
with such intent. Subject to Section 13(b) hereof, Purchase Rights granted to U.S. taxpayers under the Non-423 Component shall be subject to such terms and conditions that will permit such Purchase Rights to satisfy the requirements of the
short-term deferral exception available under Section 409A of the Code, including the requirement that the shares subject to a Purchase Right be delivered within the short-term deferral period. Subject to Section 13(b) hereof, in the case
of a Participant who would otherwise be subject to Section 

  
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409A of the Code, to the extent the Board determines that a Purchase Right or the exercise, payment, settlement or deferral thereof is subject to Section 409A of the Code, the Purchase Right
shall be granted, exercised, paid, settled or deferred in a manner that will comply with Section 409A of the Code, including U.S. Department of Treasury regulations and other interpretive guidance issued thereunder, including without limitation
any such regulations or other guidance that may be issued after the adoption of the Plan. Notwithstanding the foregoing, the Company shall have no liability to a Participant or any other party if the Purchase Right 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 Board with respect thereto. 
 (b) Although the Company may endeavor to (i) qualify a Purchase Right 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 13(a) hereof. The Company shall be unconstrained in its corporate activities without regard to the potential negative tax impact on Participants under the Plan. 

 

	14.	EFFECTIVE DATE OF PLAN. 

The Plan shall become effective on the date the Plan is adopted by the Board (the “Effective Date”) but no
Purchase Rights shall be exercised unless and until the Plan has been approved by the stockholders of the Company, which approval shall be within 12 months before or after the date the Plan is adopted by the Board. 

 

	15.	MISCELLANEOUS PROVISIONS. 

 (a) Proceeds from the sale of shares of Common Stock pursuant to Purchase Rights shall constitute general funds of the Company. 

(b) A Participant shall not be deemed to be the holder of, or to have any of the rights of a holder with respect to, shares of
Common Stock subject to Purchase Rights unless and until the Participant’s shares of Common Stock acquired upon exercise of Purchase Rights are recorded in the books of the Company (or its transfer agent). 

(c) The Plan and Offering do not constitute an employment contract. Nothing in the Plan or in the Offering shall in any way alter
the at will nature of a Participant’s employment, if applicable, or be deemed to create in any way whatsoever any obligation on the part of any Participant to continue in the employ of the Company, a Related Corporation or an Affiliate, or on
the part of the Company, a Related Corporation or an Affiliate to continue the employment of a Participant. 
 (d) The
provisions of the Plan shall be governed by the laws of the State of Delaware without resort to that state’s conflicts of laws rules. 
 (e) If any particular provision of the Plan is found to be invalid or otherwise unenforceable, such provision shall not affect the other provisions of the Plan, but the Plan shall be construed in
all respects as if such invalid provision were omitted. 

  
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	16.	DEFINITIONS. 

 As used in the Plan, the following definitions shall apply to the capitalized terms indicated below: 
 (a) “423 Component” means the part of the Plan, which excludes the Non-423 Component, pursuant to which Purchase Rights that satisfy the requirements for Employee Stock
Purchase Plans may be granted to Eligible Employees. 
 (b) “Affiliate” means (i) any entity
that, directly or indirectly, is controlled by, controls or is under common control with, the Company and (ii) any entity in which the Company has a significant equity interest, in either case as determined by the Board, whether now or
hereafter existing. 
 (c) “Board” means the Board of Directors of the Company. 

(d) “Capitalization Adjustment” means any change that is made in, or other events that occur with respect
to, the Common Stock subject to the Plan or subject to any Purchase Right after the Effective Date without the receipt of consideration by the Company (through merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend,
dividend in property other than cash, stock split, liquidating dividend, combination of shares, exchange of shares, change in corporate structure or other similar transaction). Notwithstanding the foregoing, the conversion of any convertible
securities of the Company shall not be treated as a Capitalization Adjustment. 
 (e) “Code”
means the U.S. Internal Revenue Code of 1986, as amended, including any applicable regulations and guidance thereunder. 

(f) “Committee” means a committee of one or more members of the Board to whom authority has been delegated
by the Board in accordance with Section 2(c). 
 (g) “Common Stock” means the common stock
of the Company. 
 (h) “Company” means NetScout Systems, Inc., a Delaware corporation.

 (i) “Contributions” means the payroll deductions and other additional payments specifically
provided for in the Offering, that a Participant contributes to fund the exercise of a Purchase Right. A Participant may make additional payments into his or her account, if specifically provided for in the Offering, and then only if the Participant
has not already had the maximum permitted amount withheld during the Offering through payroll deductions. 
 (j)
“Corporate Transaction” means the consummation, in a single transaction or in a series of related transactions, of any one or more of the following events: 

(i) a sale or other disposition of all or substantially all, as determined by the Board in its sole discretion, of the
consolidated assets of the Company and its Subsidiaries; 

  
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 (ii) a sale or other disposition of at least 90% of the outstanding securities of the
Company; 
 (iii) a merger, consolidation or similar transaction following which the Company is not the surviving
corporation; or 
 (iv) a merger, consolidation or similar transaction following which the Company is the surviving
corporation but the shares of Common Stock outstanding immediately preceding the merger, consolidation or similar transaction are converted or exchanged by virtue of the merger, consolidation or similar transaction into other property, whether in
the form of securities, cash or otherwise. 
 (k) “Designated Affiliate” means any Affiliate
selected by the Board as eligible to participate in the Non-423 Component. 
 (l) “Designated
Company” means a Designated Affiliate or Designated Related Corporation. 
 (m)
“Designated Related Corporation” means any Related Corporation selected by the Board as eligible to participate in the 423 Component. A Related Corporation incorporated in the United States is deemed selected by the Board
as eligible to participate in the 423 Component, unless expressly otherwise provided by the Board. 
 (n)
“Director” means a member of the Board. 
 (o) “Eligible Employee”
means an Employee who meets the requirements set forth in the Offering for eligibility to participate in the Offering, provided that such Employee also meets the requirements for eligibility to participate set forth in the Plan. 

(p) “Employee” means any person, including Officers and Directors, who is treated as an employee in the
records of the Company, a Related Corporation or an Affiliate. However, service solely as a Director, or payment of a fee for such services, shall not cause a Director to be considered an “Employee” for purposes of the Plan. Consultants
and independent contractors are not “Employees” for purposes of the Plan. 
 (q) “Employee Stock
Purchase Plan” means a plan that grants Purchase Rights intended to be options issued under an “employee stock purchase plan,” as that term is defined in Section 423(b) of the Code. 

(r) “Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended. 

(s) “Fair Market Value” means, as of any date, the value of the Common Stock determined as follows:

 (i) If the Common Stock is listed on any established stock exchange or traded on any established market, the Fair
Market Value of a share of Common Stock shall be the closing sales price for such stock as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Common Stock) on the date of determination,

  
 12 

 
as reported in such source as the Board deems reliable. Unless otherwise provided by the Board, if there is no closing sales price for the Common Stock on the date of determination, then the Fair
Market Value shall be the closing selling price (or closing bid if no sales were reported) on the last preceding date for which such quotation exists. 
 (ii) In the absence of such markets for the Common Stock, the Fair Market Value shall be determined by the Board in good faith and in a manner that complies with Sections 409A of the Code.

 (t) “Non-423 Component” means an employee stock purchase plan which is not intended to meet
the requirements set forth in Code Section 423 and the regulations thereunder. 
 (u) “Offering”
means the grant of Purchase Rights to purchase shares of Common Stock under the Plan to Eligible Employees. 
 (v)
“Offering Date” means a date selected by the Board for an Offering to commence. 
 (w)
“Officer” means a person who is an officer of the Company, an Affiliate or a Related Corporation within the meaning of Section 16 of the Exchange Act. 

(x) “Participant” means an Eligible Employee who holds an outstanding Purchase Right granted pursuant to
the Plan. 
 (y) “Plan” means this NetScout Systems, Inc. 2011 Employee Stock Purchase Plan,
including both the 423 and Non-423 Components, as amended from time to time. 
 (z) “Purchase Date”
means one or more dates during an Offering established by the Board on which Purchase Rights shall be exercised and as of which purchases of shares of Common Stock shall be carried out in accordance with such Offering.

 (aa) “Purchase Period” means a period of time specified within an Offering
beginning on the Offering Date or on the next day following a Purchase Date within an Offering and ending on a Purchase Date. An Offering may consist of one or more Purchase Periods. 

(bb) “Purchase Right” means an option to purchase shares of Common Stock granted pursuant to the Plan.

 (cc) “Related Corporation” means any “parent corporation” or “subsidiary
corporation” of the Company whether now or subsequently established, as those terms are defined in Sections 424(e) and (f), respectively, of the Code. 
 (dd) “Securities Act” means the U.S. Securities Act of 1933, as amended. 
 (ee) “Trading Day” means any day on which the exchange(s) or market(s) on which shares of Common Stock are listed, including the Nasdaq Global Select Market, the Nasdaq
Global Market, or the Nasdaq Capital Market, is open for trading. 

  
 13Exhibit 10.1

 Exhibit 10.1 
 FBR & CO. 
 RETENTION AND INCENTIVE PLAN 

(Effective February 8, 2012) 
 1. Purposes of the Plan. The purposes of the FBR & Co. Retention and Incentive Plan (the “Plan”) are to further the long-term growth of FBR & Co. (the
“Company”) by providing long-term incentives in respect of the Company’s Common Stock and other equity interests and assets related to the business of the Company to certain key employees of the Company and its Subsidiaries who
will be largely responsible for such growth, and to assist the Company and its Subsidiaries in retaining key employees of experience and ability. 
 2. Definitions. For purposes of the Plan, in addition to the terms otherwise defined in the Plan, the following terms shall have the meanings as set forth below: 

(a) “Asset Manager” shall mean the person or persons designated by the Committee to manage the Asset Pool, which shall
initially consist of the members of the Investment Committee of the Company, and which may be changed or modified from time to time by the Committee in its absolute discretion. 

(b) “Award” shall mean a Participant’s relative interest in the aggregate Award Pool, expressed as a number of
Award Units. 
 (c) “Award Letter” shall mean the written agreement evidencing the grant of an interest
(specified as a number of Award Units) representing a right to receive (i) a portion of the assets (and/or a cash payment in respect of the Fair Market Value of the assets) in the Asset Pool from time to time (an “Asset Pool
Award”), and (ii) a portion of the shares of Common Stock reserved for issuance as grants of restricted stock units under the Stock Plan under the RSU Pool (an “RSU Pool Award”). 

(d) “Award Pool” shall consist of (i) the Asset Pool and (ii) the RSU Pool. 

(e) “Award Unit” shall mean one of the equal, undivided interests in the Award Pool, and shall initially mean one of the
nine million (9,000,000) such aggregate interests. 
 (f) “Board” shall mean the Board of Directors of the
Company. 
 (g) “Cause” shall mean (i) conviction of, or plea of guilty or nolo contendere by, the
Participant for committing a felony under federal law or the law of the state in which such action occurred, (ii) willful and deliberate failure on the part of the Participant to perform his or her employment duties in any material respect,
(iii) dishonesty in the course of fulfilling the Participant’s employment duties, or (iv) a material violation of the Company’s ethics and compliance policies. Notwithstanding the general rule of Section 3, following a
Change in Control, any determination by the Committee as to whether Cause exists shall be subject to de novo review. 

(h) “Change in Control” shall have the meaning set forth in the Stock Plan. 

 (i) “Code” shall mean the Internal Revenue Code of 1986, as amended, and
the Treasury regulations thereunder. 
 (j) “Common Stock” shall mean the common stock, $0.001 par value, of
the Company. 
 (k) “Disability” shall mean permanent and total disability entitling the Participant to receive
(but for any waiting periods) benefits under the Company’s Long-Term Disability Plan applicable to the Participant. 
 (l)
“Effective Date” shall mean the date the Plan is approved by the Committee. 
 (m) “Fair Market
Value” for purposes of the Asset Pool shall be equal (i) as of the Initial Grant Date, to the amount determined by the Compensation Committee and set forth in the Award Letters under “Award Pool,” and (ii) after the
Initial Grant Date, to the aggregate amount of cash plus the value of any securities held in respect thereof, which value shall be calculated: (A) with respect to any publicly traded security (whether debt or equity), based on the per share
closing price of such security on its primary exchange on the full trading day immediately prior to the applicable measurement date, with appropriate and proportionate adjustments in respect of any stock split, stock combination, stock divided,
stock distribution, merger, consolidation or other comparable event with a record date or occurrence, as applicable, during such measurement period; (B) with respect to any security (whether debt or equity) that is not publicly traded but is
traded on a private marketplace, such as PORTAL, GSTrue or FBR PLUS, the per share closing price of such security thereon on the full trading day immediately prior to the applicable measurement date and if no such shares are traded on that day on
the most recent day on which there was a trade of such security (unless the Committee determines in good faith that such prices may not reflect fair market value as a result of limited trading, in which case, such securities may at the option of the
Committee be treated as specified in (C) below), with appropriate and proportionate adjustments in respect of any stock split, stock combination, stock divided, stock distribution, merger, consolidation or other comparable event with a record
date or occurrence, as applicable, during such measurement period; and (C) with respect to any other security, the fair market value as determined in good faith by the Committee or, if such determination cannot be made by the Committee, by a
nationally recognized independent investment banking firm selected in good faith by the Committee. 
 (n) “Good
Reason” shall mean the occurrence of any of the following events during the two-year period following a Change in Control: (i) the assignment to the Participant of duties materially inconsistent with the Participant’s position and
title as in effect immediately prior to the Change in Control, or a material diminution in such position, title or duties; (ii) a material reduction in the Participant’s annual base salary from that in effect immediately prior to the
Change in Control; or (iii) relocation of the Participant’s primary workplace, as in effect immediately prior to the Change in Control, resulting in a material increase in the Participant’s commute to and from the Participant’s
primary residence (for this purpose an increase in the Participant’s commute by 40 miles or more shall be deemed material). In order to invoke a termination for Good Reason, the Participant shall provide written notice to the Company of the
existence of one or more of the conditions described in clauses (i) through (iii) within 90 days following the initial existence of such condition or conditions, and the Company shall have 30

  
 -2-

 
days following receipt of such written notice (the “Cure Period”) during which it may remedy the condition. In the event that the Company fails to remedy the condition
constituting Good Reason during the Cure Period, the Participant must terminate employment, if at all, within 90 days following the Cure Period in order for such termination to constitute a termination for Good Reason. The Participant’s mental
or physical incapacity following the occurrence of an event described above in clauses (i) through (iii) shall not affect the Participant’s ability to terminate employment for Good Reason. 

(o) “Initial Grant Date” shall mean February 8, 2012. 

(p) “RSU Award Agreement” shall mean the written agreement evidencing the grant of a restricted stock unit representing
a right to receive a share of Common Stock granted under the Stock Plan in satisfaction of a Participant’s RSU Pool Award. 

(q) “Separation from Service” shall mean the Participant’s termination of employment with the Company, its
Subsidiaries and with each member of the controlled group (within the meaning of Section 414(b) or (c) of the Code) of which the Company is a member. Notwithstanding the foregoing, with respect to any Award that constitutes a
“non-qualified deferred compensation plan” within the meaning of Section 409A of the Code, a Participant shall not be considered to have experienced a “Separation from Service” unless the Participant has experienced a
“separation from service” within the meaning of Section 409A of the Code. 
 (r) “Stock Plan”
shall mean the FBR Capital Markets Corporation 2006 Long-Term Incentive Plan or a successor plan thereto. 
 (s)
“Subsidiary” shall mean (i) a corporation of which shares of stock having ordinary voting power (other than stock having such power only by reason of the happening of a contingency) to elect a majority of the board of directors
or other managers of such corporation are at the time owned, directly or indirectly, through one or more intermediaries, by the Company, or (ii) in the case of unincorporated entities, any such entity with respect to which the Company has the
power, directly or indirectly, to designate more than 50% of the individuals exercising functions similar to a board of directors. 
 3. Administration of the Plan. The Plan shall be administered by the Compensation Committee of the Board (the “Committee”). Subject to the provisions of the Plan, the Committee
shall have exclusive power to select Participants and to determine the allocations of Awards to be made to each Participant selected. The Committee’s interpretation of the Plan, the Award Letters and the RSU Award Agreements, and any Fair
Market Value determinations made by the Committee or pursuant to the Committee’s instruction absent a demonstration of manifest bad faith, shall be final and binding on all parties concerned, including the Company and any Participant. The
Committee shall have the authority, subject to the provisions of the Plan, to establish, adopt and revise such rules, regulations, guidelines, forms of agreements and instruments relating to the Plan as it may deem necessary or advisable for the
administration of the Plan. The Committee may appoint in writing such person or persons as it may deem necessary or desirable to carry out any of the duties or responsibilities of the Committee hereunder and may delegate to such person or persons in
writing such duties, and confer upon such person or persons in writing such powers, discretionary or otherwise, as the Committee may 

  
 -3-

 
deem appropriate. Any and all rights, duties and responsibilities of the Committee hereunder may be exercised by the Board in lieu of the Committee, in the Board’s discretion. 

4. Participation. Participants in the Plan shall be the individuals selected by the Committee from among the officers and
employees of the Company and its Subsidiaries (the “Participants”). Following the Effective Date, no additional Participants may be designated by the Committee. 

5. Award Pool. 
 (a) General. The Award Pool shall consist of the Asset Pool and the RSU Pool. The Award Pool shall initially be represented by nine million (9,000,000) Award Units, and as of the Initial Grant
Date each Participant shall be awarded the number of Award Units determined by the Compensation Committee on the Initial Grant Date. Notwithstanding any delays in the granting of forfeited RSU Pool Awards as contemplated by Section 5(c) below,
at all times 100% of the Award Pool (including the total number of RSUs to be outstanding upon the initial grant of all Awards) will be allocated among the Participants. If a Participant forfeits his or her Award under the Plan, his or her Award
Units shall automatically and without further action of the Committee be forfeited, and additional RSU Awards shall be made to each Participant as provided in Section 5(c) to reflect such Participant’s increased ownership percentage of the
aggregate RSU Pool. Upon the accelerated vesting and settlement of any individual Award prior to the time that all Awards vest, the Award Pool shall be reduced by the amount paid or delivered in respect of such settlement, and the Award Units
settled shall be retired and shall not be reissued. 
 (b) Asset Pool. 

(i) Establishment of the Asset Pool. As of the Initial Grant Date, the incentive pool shall be equal to $3 million
(the “Asset Pool”), which is the aggregate Fair Market Value as of the Initial Grant Date of the assets of the Company and its Subsidiaries listed on Schedule A hereto (the “Initial Assets”). Following the
Initial Grant Date, the Asset Pool shall be an amount equal to the aggregate Fair Market Value of the Initial Assets as of the applicable determination date (or such other assets that are deemed to constitute the assets of the Asset Pool from time
to time based on the decisions with respect to the management of the Initial Assets by the Asset Manager), taking into account any increase or decrease in the value of such assets, any individual accelerated vesting and settlement, any dividends or
other distributions paid in respect of such assets, and the proceeds received by the Company or its Subsidiaries in respect of the sale or other disposition of such assets, in all cases, without reduction for any taxes or transaction costs or
expenses applicable to or payable by the Company or its Subsidiaries in respect of such assets. Following the Effective Date, the Company shall have no obligation to allocate any assets of the Company or its Subsidiaries to the Asset Pool.

 (ii) Establishment of the Asset Pool Account. As of the Initial Grant Date, a separate bookkeeping
account shall be established and maintained by the Company in respect of the cash and securities comprising the Asset Pool (the “Account”). The Account shall reflect the assets of the Asset Pool and the Fair Market Value of the
Asset 

  
 -4-

 
Pool as existing from time to time. The Account shall exist solely for record-keeping purposes and shall not represent any actual interest in any assets of the Company or its Subsidiaries.

 (iii) Management of the Asset Pool. Except as otherwise specified in the resolutions of the Committee
from time to time, the Asset Manager shall have full authority and discretion to manage the assets underlying the Asset Pool, including the ability to sell, hold or hedge such assets (including any proceeds received in respect of the sale of the
Initial Assets, any reinvestments and subsequent proceeds and any dividends or distributions received in respect thereof) or otherwise act or refrain from acting in connection with such assets. The Company and its Subsidiaries and the members of the
Board and the Committee shall have no liability for the value of the Initial Assets, the management of the Initial Assets or any other assets attributable to the Asset Pool and, in particular, shall not be responsible for maximizing the value of the
assets in the Asset Pool. 
 (c) RSU Pool. 

(i) Establishment of the RSU Pool. Subject to Section 12.2 of the Stock Plan, the aggregate number of shares
of Common Stock reserved for issuance in respect of RSU Pool Awards allocated under the Plan shall be 2,510,460 (the “RSU Pool”). All RSU Pool Awards shall be granted under the Stock Plan, and the Company shall reserve for issuance
a sufficient number of shares of Common Stock to satisfy the RSU Pool Awards. If an RSU Pool Award is forfeited, for purposes of the Stock Plan, such forfeited RSU Pool Award shall continue to be reserved for issuance in respect of RSU Pool Awards
from the RSU Pool. 
 (ii) Grant of RSU Pool Awards. As of the Initial Grant Date, a Participant shall be
granted an RSU Pool Award pursuant to an RSU Award Agreement with respect to the number of shares of Common Stock, rounded to the nearest whole share, equal to such Participant’s interest in the RSU Pool. If an RSU Pool Award is forfeited or
otherwise terminates for any reason whatsoever without an actual payment or delivery of Common Stock to the Participant, any such RSU Pool Award shall, to the extent of any such forfeiture or termination, again be available for grant under the Plan.
Forfeited RSU Pool Awards shall be automatically reallocated, in whole shares, to the then-remaining Participants as described in Section 5(a) above, with any fractional shares to be reserved and aggregated with other fractional shares for
issuance on a future reallocation date. The grant of forfeited RSU Awards shall be made on the first day of the calendar quarter following the date on which a forfeiture occurs. Grants of reallocated RSU Pool Awards shall be evidenced by the
entering into of an additional RSU Award Agreement, substantially in the form used for the RSU Pool Awards made on the Initial Grant Date, with the vesting date to continue to be the fourth anniversary of the Initial Grant Date. Notwithstanding
anything contained in the Stock Plan or the RSU Award Agreement, the provisions of Section 11.4 of the Stock Plan shall be inapplicable to the RSU Pool Awards granted under the Plan. 

  
 -5-

 6. Vesting and Settlement of Asset Pool Awards. 

(a) Vesting; Forfeiture. Except as otherwise provided herein, a Participant’s Asset Pool Award shall vest on the fourth
anniversary of the Initial Grant Date, subject to the Participant not having incurred a Separation from Service as of such date. Notwithstanding the foregoing, a Participant’s Asset Pool Award shall vest in full or in part (as specified below)
on an accelerated basis under the following circumstances: 
 (i) on the date of a Participant’s Separation
from Service due to the Participant’s death or Disability, the Asset Pool Award shall immediately vest in full; 
 (ii) on the date of a Participant’s Separation from Service by the Company without Cause prior to a Change in Control, the Asset Pool Award shall immediately vest on a pro-rata basis, based on a
fraction, the numerator of which shall be the number of days elapsed from the Initial Grant Date through the date of the Participant’s Separation from Service, and the denominator of which shall be 1,460 (the “Pro-ration
Fraction”), subject to the Participant’s delivery to the Company of an executed release of claims against the Company and its affiliates in a form substantially similar to the release of claims attached hereto as Exhibit A (with
such updates and modifications as the Company determines are necessary) and the expiration (without the Participant revoking) of any applicable non-revocation period set forth in such release (the “Release Requirement”) no later
than 55 days from the date of Separation from Service; and 
 (iii) on the date of a Participant’s
Separation from Service by the Company without Cause or by the Participant for Good Reason, in either case, during the two-year period following a Change in Control, the Asset Pool Award shall immediately vest in full. 

Following the applicable vesting date, the Participant and his or her estate or beneficiary shall have no right to future allocations of
forfeited Asset Pool Awards. Except as provided in this Section 6(a), upon a Participant’s date of Separation from Service prior to the fourth anniversary of the Initial Grant Date, the Participant’s allocated Asset Pool Award and
right to future allocations of Asset Pool Awards shall terminate in full. 
 (b) Settlement. Payment or distribution in
respect of a vested Asset Pool Award will be made as soon as practicable (and in any event within 75 days) after the applicable vesting date (and in no event later than March 15 of the calendar year following the calendar year in which such
vesting date occurs). Settlement of Asset Pool Awards may be made in cash or kind, in the sole discretion of the Committee; provided, that there shall be uniform treatment among the Participants receiving settlement of Asset Pool Awards that
vested on the same date. With respect to each Award Unit settled, the holder thereof shall receive an amount, in cash or kind, equal to the Fair Market Value of the aggregate Asset Pool on the applicable vesting date (determined as set forth in the
definition of Fair Market Value) divided by the total number of Award Units outstanding on the applicable vesting date. 

  
 -6-

 7. Vesting and Settlement of RSU Pool Awards. 

(a) Vesting; Forfeiture. Except as otherwise provided herein, a Participant’s RSU Pool Award shall vest on the fourth
anniversary of the Initial Grant Date, subject to the Participant not having incurred a Separation from Service as of such date. Notwithstanding the foregoing, a Participant’s RSU Pool Award shall vest in full or in part (as specified below) on
an accelerated basis under the following circumstances: 
 (i) on the date of a Participant’s Separation
from Service due to the Participant’s death or Disability, the RSU Pool Award shall immediately vest in full; 
 (ii) on the date of a Participant’s Separation from Service by the Company without Cause prior to a Change in Control, the RSU Pool Award shall immediately vest on a pro-rata basis, based on the
Pro-ration Fraction, subject to the Participant’s satisfaction of the Release Requirement no later than 55 days from the date of Separation from Service; 
 (iii) on the date of a Participant’s Separation from Service by the Company without Cause or by the Participant for Good Reason, in either case, during the two-year period following a Change in
Control, the RSU Pool Award shall immediately vest in full. 
 Following the applicable vesting date, the Participant and his or
her estate or beneficiary shall have no right to future allocations of forfeited RSU Pool Awards. Except as provided in this Section 7(a), upon a Participant’s date of Separation from Service prior to the fourth anniversary of the Initial
Grant Date, the Participant’s allocated RSU Pool Awards and right to future allocations of RSU Pool Awards shall terminate in full. 
 (b) Settlement. Vested RSU Pool Awards will be settled by delivery of a share of Common Stock (or, in the Committee’s discretion, a cash payment based on the per share “fair market
value” (as defined in the Stock Plan)) as soon as practicable (and in any event within 55 days) after the applicable vesting date (and in no event later than March 15 of the calendar year following the calendar year in which such vesting
date occurs). 
 (c) Other Terms. RSU Pool Awards shall have such other terms, not inconsistent with the Plan and the
Stock Plan, as shall be set forth in the RSU Award Agreement. For purposes of the RSU Pool Awards, the definition of “fair market value” in the Stock Plan shall apply. 

8. Dispute Resolution. 
 (a) In General. All disputes, controversies and claims arising between a Participant and the Company concerning the subject matter of the Plan or an Award Letter or RSU Award Agreement shall be
settled by arbitration in accordance with the rules and procedures of the American Arbitration Association (“AAA”) in effect at the time that the arbitration begins, to the extent not inconsistent with the Plan or an Award Letter or
the RSU Award Agreement. The arbitration shall be conducted in accordance with the AAA’s Commercial Arbitration Rules as modified herein. The location of the arbitration shall be Arlington, Virginia or such other place

  
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as the parties to the dispute may mutually agree. In rendering any award or ruling, the arbitrator or arbitrators shall determine the rights and obligations of the parties according to the
substantive and procedural laws of the Commonwealth of Virginia, including federal law as applied in Virginia courts. The arbitration shall be conducted by an arbitrator selected in accordance with the aforesaid arbitration procedures. Any
arbitration pursuant to this Section 8(a) shall be final and binding on the parties, and judgment upon any award rendered in such arbitration may be entered in any court, federal or state, having jurisdiction. The parties to any dispute shall
each pay their own costs and expenses (including arbitration fees and attorneys’ fees) incurred in connection with arbitration proceedings and the fees of the arbitrator shall be paid in equal amounts by the parties. The arbitration shall be
conducted on a strictly confidential basis, and the parties agree to take all steps necessary to protect the confidentiality of the arbitration proceedings and materials, and in connection with any such proceeding, agree to file any materials or
documents under seal. 
 (b) Waiver of Jury Trial. As a condition to receipt of an Award under the Plan, a Participant
and the Company shall waive, to the fullest extent permitted by applicable law, any right either party may have to a trial by jury in respect to any litigation directly or indirectly arising out of, under or in connection with the Plan or an Award
Letter or RSU Award Agreement. 
 9. Miscellaneous Provisions. 

(a) Right to Awards. No employee or other person shall have any claim or right to be granted any Award under the Plan. No
Participant shall have any legally binding right with respect to any Award under the Plan unless and until the date of the actual delivery to the Participant of the Award Letter evidencing such grant. 

(b) No Rights as Stockholders. Until such time as a share of Common Stock is issued to a Participant in respect of an RSU Pool
Award or an equity interest with respect to the assets underlying the Asset Pool are issued to a Participant, the Participants shall have no rights as a stockholder or otherwise. 

(c) Right of Discharge Reserved; Claims to Awards. Nothing in the Plan nor the grant of an Award hereunder shall confer upon any
Participant the right to continue in the employment or service of the Company or any Subsidiary or affect any right that the Company or any Subsidiary may have to terminate the employment or service of any Participant at any time for any reason.
Except as specifically provided by the Committee, the Company shall not be liable for the loss of existing or potential profit from an Award granted in the event of termination of an employment or other relationship. 

(d) No Fractional RSU Pool Awards. No fractional RSU Pool Awards shall be issued or delivered pursuant to the Plan or any RSU
Award Agreement, and the Committee shall determine whether cash or other property shall be paid or transferred in lieu of any fractional share of Common Stock in respect of an RSU Pool Award or whether such fractional share of Common Stock and any
rights thereto shall be canceled, terminated or otherwise eliminated. 

  
 -8-

 (e) Costs and Expenses. All costs and expenses incurred in administering the Plan
shall be borne by the Company. 
 (f) Unfunded Status of the Plan. The Plan is intended to constitute an
“unfunded” plan for incentive compensation. With respect to any payments not yet made to a Participant by the Company, nothing contained herein shall give any such Participant any rights that are greater than those of a general creditor of
the Company. In its sole discretion, the Committee may authorize the creation of trusts or other arrangements to meet the obligations created under the Plan; provided, however, that the existence of such trusts or other arrangements is
consistent with the unfunded status of the Plan. 
 (g) Withholding Taxes. The Company shall have the right to deduct
from all payments made hereunder any federal, state, local or foreign income or employment taxes required, in the sole judgment of the Company, to be withheld with respect to such payments and to make such other arrangements with a Participant as it
deems appropriate with respect to any employment taxes required to be paid by the Participant upon the vesting of any Awards under the Plan. With respect to RSU Pool Awards, to the extent permitted under the Stock Plan, the Participant may elect to
have any withholding obligation satisfied by surrendering to the Company a portion of the shares of Common Stock that are issued or transferred to the Participant upon the vesting of the RSU Pool Award (but only to the extent of the minimum
withholding required by law), and the shares of Common Stock so surrendered by the Participant shall be credited against any such withholding obligation at the “fair market value” (as defined in the Stock Plan) of such shares on the date
of such surrender. Tax withholding with respect to Asset Pool Awards shall be based on the Fair Market Value of the Asset Pool Award on the applicable date as determined by the Committee, and with respect to RSU Pool Awards shall be based on the
definition of “fair market value” under the Stock Plan. 
 (h) Limits on Transferability. Rights in respect of
Awards under the Plan shall not be pledged, encumbered, or hypothecated to, or in favor of, or subject to any lien, obligation, or liability of a Participant to, any party, other than the Company or any Subsidiary, nor shall such rights be
assignable or transferable by the recipient thereof, other than by will or the laws of descent and distribution or pursuant to a qualified domestic relations order. 
 (i) Beneficiary. Any payments on account of any Award under the Plan of a deceased Participant shall be paid to such beneficiary as has been designated in a writing by the Participant and delivered
to the Company or, in the absence of an effective designation, to the Participant’s estate. 
 (j) Relationship to Other
Benefits. No Award or payment under the Plan shall be taken into account in determining any benefits under any pension, retirement, severance, profit sharing, group insurance or other benefit plan of the Company or any Subsidiary or affiliate
thereof. 
 (k) Severability. If any provision of the Plan shall be held unlawful or otherwise invalid or unenforceable
in whole or in part by a court of competent jurisdiction, such provision shall (i) be deemed limited to the extent that such court of competent jurisdiction deems it lawful, valid and/or enforceable and as so limited shall remain in full force
and effect, and 

  
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(ii) not affect any other provision of the Plan or part thereof, each of which shall remain in full force and effect. If the making of any payment or the provision of any other benefit
required under the Plan shall be held unlawful or otherwise invalid or unenforceable by a court of competent jurisdiction, such unlawfulness, invalidity or unenforceability shall not prevent any other payment or benefit from being made or provided
under the Plan, and if the making of any payment in full or the provision of any other benefit required under the Plan in full would be unlawful or otherwise invalid or unenforceable, then such unlawfulness, invalidity or unenforceability shall not
prevent such payment or benefit from being made or provided in part, to the extent that it would not be unlawful, invalid or unenforceable, and the maximum payment or benefit that would not be unlawful, invalid or unenforceable shall be made or
provided under the Plan. 
 (l) Section 409A of the Code. It is intended that the Awards under the Plan shall
comply with an exemption to Section 409A of the Code, or in the absence of complying with an exemption, comply with the provisions of Section 409A of the Code and the Treasury regulations relating thereto, and any exercise of authority or
discretion hereunder by the Company or the Committee shall comply with Section 409A of the Code. Any payments that qualify for the “short-term deferral” exception under Treasury Regulations Section 1.409A-1(b)(4), the
“separation pay” exception under Treasury Regulations Section 1.409A-1(b)(9)(iii) or another exception under Section 409A will be paid under the applicable exception to the greatest extent possible. Each payment of compensation
under the Plan will be treated as a separate payment, and in no event may a Participant, directly or indirectly, designate the calendar year of any payment under the Plan. Notwithstanding any other provision of the Plan to the contrary, if an Award
under the Plan is determined to constitute a “nonqualified deferred compensation plan” subject to Section 409A and if a Participant is considered a “specified employee” for purposes of Section 409A (as determined in
accordance with the methodology established by the Company as in effect on the date of Separation from Service), payment with respect to any such Award that constitutes a “nonqualified deferred compensation plan” subject to
Section 409A that is otherwise due to the Participant under the Plan during the six-month period following his or her “separation from service” (as determined in accordance with Section 409A) on account of his or her Separation
from Service shall be accumulated and paid to the Participant on (i) the first day of the seventh month following the Participant’s Separation from Service or (ii) the Participant’s death. 

10. Amendment or Termination of the Plan. The Committee, without the consent of any Participant, may at any time, from time to
time, alter, amend, suspend or terminate the Plan or an Award Letter or RSU Award Agreement in whole or in part, as it shall deem advisable; provided, however, that no such action shall adversely affect any rights or obligations with respect
to payment of any Awards theretofore granted under the Plan. 
 11. Effective Date. The Plan shall become effective on
the Effective Date. 
 12. Law Governing. The validity and construction of the Plan and any Award Letters and RSU Award
Agreements entered into thereunder shall be governed by the laws of the Commonwealth of Virginia, but without giving effect to the choice or conflict of law principles thereof or any other jurisdiction. 

  
 -10-

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