EX-10.21



 Exhibit 10.21 
 Execution Copy 
 GIGAMON LLC 

CHANGE IN CONTROL SEVERANCE AGREEMENT 
 This Change in Control Severance Agreement (the “Agreement”) is made and entered into by and between Mike Hoffman (“Executive”) and Gigamon LLC, a Delaware limited
liability company (the “Company”), effective as of September 17, 2012 (the “Effective Date”). 
 RECITALS 
 1. It is expected that the Company from time to time will
consider the possibility of an acquisition by another company or other change in control. The Board of Directors of the Company (the “Board”) recognizes that such considerations can be a distraction to Executive and can cause
Executive to consider alternative employment opportunities. The Board has determined that it is in the best interests of the Company and its stockholders to assure that the Company will have the continued dedication and objectivity of Executive,
notwithstanding the possibility, threat or occurrence of such a termination of employment or the occurrence of a Change in Control (as defined herein) of the Company. 
 2. The Board believes that it is in the best interests of the Company and its stockholders to provide Executive with an incentive to continue his employment and to motivate Executive to maximize the value
of the Company for the benefit of its stockholders. 
 3. The Board believes that it is imperative to provide Executive with
certain severance benefits upon Executive’s termination of employment in connection with a Change in Control. These benefits will provide Executive with enhanced financial security, incentive and encouragement to remain with the Company.

 4. Certain capitalized terms used in the Agreement are defined in Section 7 below. 

AGREEMENT 
 NOW, THEREFORE, in consideration of the mutual covenants contained herein, the parties hereto agree as follows: 
 1. Term of Agreement. This Agreement will have an initial term of three (3) years commencing on the Effective Date (the “Initial Term”). On the third anniversary of the
Effective Date, this Agreement will renew automatically for additional one (1) year terms (each an “Additional Term”), unless either party provides the other party with written notice of non-renewal at least sixty
(60) days prior to the date of automatic renewal. Notwithstanding the foregoing provisions of this paragraph, if a Change in Control occurs when there are fewer than twelve (12) months remaining during the Initial Term or an Additional
Term, the term of this Agreement will extend automatically through the date that is twelve (12) months following the effective date of the Change in Control. If Executive becomes entitled to benefits under Section 3 during the term of this
Agreement, the Agreement will not terminate until all of the obligations of the parties hereto with respect to this Agreement have been satisfied. 







 2. At-Will Employment. The Company and Executive acknowledge that Executive’s
employment is and will continue to be at-will, as defined under applicable law. 
 3. Severance Benefits. 

(a) Termination without Cause or Resignation for Good Reason Outside the Change in Control Period. If, other than within the
period beginning three (3) months prior to a Change in Control and ending twelve (12) months following a Change in Control (the “Change in Control Period”), the Company terminates Executive’s employment with the
Company without Cause (excluding death or Disability) or Executive resigns for Good Reason, then subject to Section 4, Executive will receive the following: 
 (i) Severance Payment. Executive will receive a lump-sum payment (less applicable withholding taxes) equal to six (6) months of Executive’s annual base salary as in effect immediately
prior to Executive’s termination date. Such lump-sum amount shall be payable on the effective date of the Release specified in Section 4(a) or such later time as required by Section 4(c). 

(ii) Equity. Executive’s then outstanding Company equity awards, including Executive’s outstanding awards under the
Company’s Performance Unit Plan (the “Equity Awards”), will accelerate vesting by the amount that would otherwise have vested had Executive remained employed for six (6) months following the termination date. 

(iii) Continued Employee Benefits. If Executive elects continuation coverage pursuant to the Consolidated
Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”) for Executive and Executive’s eligible dependents (as applicable), within the time period prescribed pursuant to COBRA, the Company will reimburse Executive for,
or pay directly on Executive’s behalf, the COBRA premiums for such coverage (at the coverage levels in effect immediately prior to Executive’s termination of employment) until the earlier of (A) a period. of six (6) months from
the last date of employment of the Executive with the Company, or (B) the date upon which Executive and/or Executive’s eligible dependents becomes covered under similar plans. Notwithstanding anything to the contrary in this
Section 3(a)(iii), if the Company determines in its sole discretion that it cannot provide the COBRA benefits without potentially violating applicable law (including, without limitation, Section 2716 of the Public Health Service Act), the
Company will in lieu thereof provide to Executive a taxable monthly payment in an amount equal to the monthly COBRA premium that Executive would be required to pay to continue his group health coverage in effect on the date of his termination of
employment (which amount will be based on. the premium for the first month of COBRA coverage), which payments will be made regardless of whether Executive elects COBRA continuation coverage and will commence in the month following the month in which
Executive terminates employment and will end on the earlier of (x) the date upon which Executive becomes covered under similar plans or (y) the last day of the sixth (6th) calendar month following the month in which Executive terminations employment. 

  
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 (b) Termination without Cause or Resignation for Good Reason During Change in Control
Period. If during the Change in Control Period the Company terminates Executive’s employment with the Company without Cause (excluding death or Disability) or Executive resigns for Good Reason, then, subject to Section 4, Executive
will receive the following: 
 (i) Severance Payment. Executive will receive a lump-sum payment (less applicable
withholding taxes) equal to six (6) months of Executive’s annual base salary as in effect immediately prior to Executive’s termination date. Such amount lump-sum amount shall be payable on the effective date of the Release specified
in Section 4(a) or such later time as required by Section 4(c). 
 (ii) Equity. Executive s Equity Awards will
accelerate vesting by either (A) the amount that would otherwise have vested had Executive remained employed for twenty four (24) months following the termination date if the Change in Control occurs within the first twelve
(12) months following Executive’s date of hire, or (B) one hundred percent (100%) if the Change in Control occurs after the first twelve (12) months following Executive’s date of hire. The Equity Awards will remain
exercisable, to the extent applicable, following Executive’s termination or the period prescribed by the applicable equity plan and agreement for each Equity Award. 
 (iii) Continued Employee Benefits. If Executive elects continuation coverage pursuant to COBRA for Executive and Executive’s eligible dependents (as applicable), within the time period
prescribed pursuant to COBRA, the Company will reimburse Executive for, or pay directly on Executive’s behalf, the COBRA premiums for such coverage (at the coverage levels in effect immediately prior to Executive’s termination of
employment) until the earlier of (A) a period of six (6) months from the last date of employment of the Executive with the Company, or (B) the date upon which Executive and/or Executive’s eligible dependents becomes covered under
similar plans. Notwithstanding anything to the contrary in this Section 3(b)(iii), if the Company determines in its sole discretion that it cannot provide the COBRA benefits without potentially violating applicable law (including, without
limitation, Section 2716 of the Public Health Service Act), the Company will in lieu thereof provide to Executive a taxable monthly payment in an amount equal to the monthly COBRA premium that Executive would be required to pay to continue his
group health coverage in effect on the date of his termination of employment (which amount will be based on the premium for the first month of COBRA coverage), which payments will be made regardless of whether Executive elects COBRA continuation
coverage and will commence in the month following the month in which Executive terminates employment and will end on the earlier of (x) the date upon which Executive becomes covered under similar plans or (y) the last day of the sixth
(6th) calendar month following the month in which Executive terminations employment. 
 (c) Other Termination. If
Executive’s employment with the Company terminates other than as set forth in Sections 3(a) and 3(b) above, then (i) all vesting will terminate immediately with respect to Executive’s outstanding Equity Awards, (ii) all
payments of compensation by the Company to Executive hereunder will terminate immediately (except as to amounts already earned), and (iii) Executive will only be eligible for severance benefits in accordance with the Company’s established
policies, if any, as then in effect. 

  
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 (d) Exclusive Remedy. In the event of a termination of Executive’s employment as
set forth in Sections 3(a) and 3(b) of this Agreement, the provisions of Section 3 are intended to be and are exclusive and in lieu of and supersede any other rights or remedies to which Executive or the Company otherwise may be entitled,
whether at law, tort or contract or in equity, or under this Agreement (other than the payment of accrued but unpaid wages, as required by law, and any unreimbursed reimbursable expenses). Executive will be entitled to no benefits, compensation or
other payments or rights upon termination of employment other than those benefits expressly set forth in Section 3 of this Agreement. 
 4. Conditions to Receipt of Severance 
 (a) Release
of Claims Agreement. The receipt of any severance payments or benefits pursuant to this Agreement is subject to Executive signing and not revoking a separation agreement and release of claims in a form acceptable to the Company (the
“Release”), which must become effective and irrevocable no later than the sixtieth (60th) day following Executive’s termination of employment (the “Release Deadline”). If the Release does not become effective and irrevocable by the Release Deadline, Executive will
forfeit any right to severance payments or benefits under this Agreement. No severance payments and benefits under Section 3 of this Agreement will be paid or provided until the Release becomes effective and irrevocable, and, subject to
Section 4(c) of this Agreement, any such severance payments and benefits otherwise payable between the date of Executive’s termination of employment and the date the Release becomes effective and irrevocable will be paid on the date the
Release becomes effective and irrevocable. 
 (b) Confidential Information and Invention Assignment Agreements.
Executive’s receipt of any payments or benefits under Section 3 will be subject to Executive continuing to comply with the terms of any confidential information and invention assignment agreement executed by Executive in favor of the
Company (the “Confidentiality Agreement”) and the provisions of this Agreement. 
 (c)
Section 409A. 
 (i) Notwithstanding anything to the contrary in this Agreement, no severance payments or benefits
payable to Executive, if any, pursuant to this Agreement that, when considered together with any other severance payments or separation benefits, is considered deferred compensation under Internal Revenue Code Section 409A (together, the
“Deferred Payments”) will be payable until Executive has a “separation from service” within the meaning of Section 409A (“Section 409A”) of the Internal Revenue Code of 1986, as amended (the
“Code”). Similarly, no severance payable to Executive, if any, pursuant to this Agreement that otherwise would be exempt from Section 409A pursuant to Treasury Regulation Section 1.409A-1(b)(9) will be payable until
Executive has a “separation from service” within the meaning of Section 409A. 
 (ii) Any
severance payments or benefits under this Agreement that would be considered Deferred Payments will be paid on, or, in the case of installments, will not commence until, the sixtieth (60th) day following Executive’s separation from service, or, if later, such time as required by
Section 4(c)(iii). Except as required by Section 4(c)(iii), any installment payments that would have been made to Executive dining the sixty (60) day period immediately following


  
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Executive’s separation from service but for the preceding sentence will be paid to Executive on the sixtieth (60th) day following Executive’s separation from service and the remaining payments shall be made as provided in
this Agreement. 
 (iii) Further, if Executive is a “specified employee” within the meaning of Section 409A at
the time of Executive’s separation from service (other than due to death), any Deferred Payments that otherwise are payable within the first six (6) months following Executive’s separation from service will become payable on the first
payroll date that occurs on or after the date six (6) months and one (1) day following the date of Executive’s separation from service. All subsequent Deferred Payments, if any, will be payable in accordance with the payment schedule
applicable to each payment or benefit. Notwithstanding anything herein to the contrary, in the event of Executive’s death following Executive’s separation from service but prior to the six (6) month anniversary of Executive’s
separation from service (or any later delay date), then any payments delayed in accordance with this paragraph will be payable in a lump sum as soon as administratively practicable after the date of Executive’s death and all other Deferred
Payments will be payable in accordance with the payment schedule applicable to each payment or benefit. Each payment and benefit payable under the Agreement is intended to constitute a separate payment for purposes of Section 1.409A-2(b)(2) of
the Treasury Regulations. 
 (iv) Any amount paid under this Agreement that satisfies the requirements of the “short-term
deferral” rule set forth in Section 1.409A-1(b)(4) of the Treasury Regulations will not constitute Deferred Payments for purposes of clause (i) above. Any amount paid under this Agreement that qualifies as a payment made as a result
of an involuntary separation from service pursuant to Section 1.409A-1(b)(9)(iii) of the Treasury Regulations that does not exceed the Section 409A Limit (as defined below) will not constitute Deferred Payments for purposes of clause
(i) above. 
 (v) The foregoing provisions are intended to comply with, or be exempt from, the requirements of
Section 409A so that none of the severance payments and benefits to be provided under the Agreement will be subject to the additional tax imposed under Section 409A, and any ambiguities herein will be interpreted to so comply or be exempt.
Executive and the Company agree to work together in good faith to consider amendments to the Agreement and to take such reasonable actions which are necessary, appropriate or desirable to avoid imposition of any additional tax or income recognition
prior to actual payment to Executive under Section 409A. In no event will the Company reimburse Executive for any taxes that may be imposed on Executive as result of Section 409A. 

5. Limitation on Payments. In the event that the severance and other benefits provided for in this Agreement or otherwise payable
to Executive (i) constitute “parachute payments” within the meaning of Section 280G of the Code and (ii) but for this Section 5, would be subject to the excise tax imposed by Section 4999 of the Code, then
Executive’s severance benefits under Section 3 will be either: 
  

	 	(a)	delivered in full, or 

  

	 	(b)	delivered as to such lesser extent which would result in no portion of such severance benefits being subject to excise tax under Section 4999 of the Code,



  
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 whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes
and the excise tax imposed by Section 4999, results in the receipt by Executive on an after-tax basis, of the greatest amount of severance benefits, notwithstanding that all or some portion of such severance benefits may be taxable under
Section 4999 of the Code. If a reduction in severance and other benefits constituting “parachute payments” is necessary so that benefits are delivered to a lesser extent, reduction will occur in the following order: (i) reduction
of cash payments; (ii) cancellation of awards granted “contingent on a change in ownership or control” (within the meaning of Code Section 280G), (iii) cancellation of accelerated vesting of equity awards;
(iv) reduction of employee benefits. In the event that acceleration of vesting of equity award compensation is to be reduced, such acceleration of vesting will be cancelled in the reverse order of the date of grant of Executive’s equity
awards. 
 Unless the Company and Executive otherwise agree in writing, any determination required under this Section 5
will be made in writing by the Company’s independent public accountants immediately prior to the Change in Control (the “Accountants”), whose determination will be conclusive and binding upon Executive and the Company for all
purposes. For purposes of making the calculations required by this Section 5, the Accountants may make reasonable assumptions and approximations concerning applicable taxes and may rely on reasonable, good faith interpretations concerning the
application of Sections 280G and 4999 of the Code. The Company and Executive will furnish to the Accountants such information and documents as the Accountants may reasonably request in order to make a determination under this Section. The
Company will bear all costs the Accountants may reasonably incur in connection with any calculations contemplated by this Section 5. 
 6. Definition of Terms. For purposes of this Agreement, the following terms referred to in this Agreement will have the following meanings: 

(a) Cause. “Cause” means the occurrence of any of the following events, as determined in good faith by the Board:
(i) the Executive’s gross negligence or willful misconduct in the performance of duties, including without limitation, willful violation of any Company policy, where such negligence, misconduct, or violation has resulted or is likely to
result in substantial and material damage to the Company or any of its subsidiaries or successors; (ii) the Executive’s repeated or unjustified absence from the Company; (iii) the Executive’s commission of any act of fraud,
embezzlement, or professional dishonesty with respect to the Company; (iv) the Executive’s conviction of any felony or crime involving moral turpitude which causes material harm to the standing and reputation of the Company; or
(v) the Executive’s incurable material breach of any written agreement the Executive has with the Company, including without limitation, the Executive’s misappropriation or misuse of the Company’s intellectual property under the
Company’s Employee Agreement Regarding Proprietary Information and Inventions. 

  
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 (b) Change in Control. “Change in Control” means the occurrence of
any of the following: 
 (i) A change in the ownership of the Company which occurs on the date that any one person, or more
than one person acting as a group (“Person”), acquires ownership of the stock of the Company that, together with the stock held by such Person, constitutes more than 50% of the total voting power of the stock of the Company;
provided, however, that for purposes of this subsection (i), the acquisition of additional stock by any one Person, who is considered to own more than 50% of the total voting power of the stock of the Company will not be considered a Change in
Control; or 
 (ii) A change in the effective control of the Company which occurs on the date that a majority of members of the
Board (each, a “Director”) is replaced during any twelve (12) month period by Directors whose appointment or election is not endorsed by a majority of the members of the Board prior to the date of the appointment or election.
For purposes of this subsection (ii), if any Person is considered to be in effective control of the Company, the acquisition of additional control of the Company by the same Person will not be considered a Change in Control; or 

(iii) A change in the ownership of a substantial portion of the Company’s assets which occurs on the date that any Person acquires
(or has acquired during the twelve (12) month period ending on the date of the most recent acquisition by such person or persons) assets from the Company that have a total gross fair market value equal to or more than 50% of the total gross
fair market value of all of the assets of the Company immediately prior to such acquisition or acquisitions; provided, however, that for purposes of this subsection (iii), the following will not constitute a change in the ownership of a substantial
portion of the Company’s assets: (A) a transfer to an entity that is controlled by the Company’s stockholders immediately after the transfer, or (B) a transfer of assets by the Company to: (1) a stockholder of the Company
(immediately before the asset transfer) in exchange for or with respect to the Company’s stock, (2) an entity, 50% or more of the total value or voting power of which is owned, directly or indirectly, by the Company, (3) a Person,
that owns, directly or indirectly, 50% or more of the total value or voting power of all the outstanding stock of the Company, or (4) an entity, at least 50% of the total value or voting power of which is owned, directly or indirectly, by a
Person described in this subsection (iii)(B)(3). For purposes of this subsection (iii), gross fair market value means the value of the assets of the Company, or the value of the assets being disposed of, determined without regard to any liabilities
associated with such assets. 
 For purposes of this definition of Change in Control, persons will be considered to be acting
as a group if they are owners of a corporation that enters into a merger, consolidation, purchase or acquisition of stock, or similar business transaction with the Company. 
 Notwithstanding the foregoing, a transaction will not be deemed a Change in Control unless the transaction qualifies as a change in control event within the meaning of Code Section 409A, as it has
been and may be amended from time to time, and any proposed or final Treasury Regulations and Internal Revenue Service guidance that has been promulgated or may be promulgated thereunder from time to time. 

Further and for the avoidance of doubt, a transaction will not constitute a Change in Control if: (i) its sole purpose is to change
the state of the Company’s incorporation, or (ii) its sole purpose is to create a holding company that will be owned in substantially the same proportions by the persons who held the Company’s securities immediately before such
transaction. 

  
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 (c) Disability. “Disability” means Executive is unable to engage in
any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death or can be expected to last for a continuous period of not less than twelve (12) months. 

(d) Good Reason. “Good Reason” means Executive’s termination of employment within thirty (30) days
following the expiration of any cure period (discussed below) following the occurrence of one or more of the following without Executive’s written consent: (i) a material reduction in Executive’s position, duties, authority, or
responsibilities relative to Executive’s position, duties, authority, or responsibilities in effect immediately prior to such reduction; provided, however, that a reduction in position, duties, authority or responsibilities solely by virtue of
the Company being acquired and made part of a larger entity (for example, where Executive retains essentially the same responsibility and duties of the subsidiary, business unit or division substantially containing the Company’s business
following a Change in Control) shall not constitute “Good Reason”; (ii) a material reduction in Executive’s base salary other than a reduction by the Company with respect to all executives as part of a general readjustment of
their compensation levels; (iii) a material reduction in kind or level of benefits to which Executive is entitled immediately prior to such change with the result that Executive’s overall benefits package is materially reduced unless it is
part of a Company-wide change of the same percentage; or (iv) relocation of Executive’s principal place of employment by more than fifty (50) miles from Executive’s then-current location of employment, without Executive’s
prior written consent In order for an event to qualify as a Good Reason, Executive must not terminate employment with the Company without first providing the Company with written notice of the acts or omissions constituting the grounds for Good
Reason within ninety (90) days of the initial existence of the grounds for Good Reason and such grounds have not be cured by the Company during a period of thirty (30) days following the date of such notice. 

(e) Section 409A Limit. “Section 409A Limit” means the lesser of two (2) times:
(i) Executive’s annualized compensation based upon the annual rate of pay paid to Executive during the Executive’s taxable year preceding the Executive’s taxable year of Executive’s termination of employment as determined
under, and with such adjustments as are set forth in, Treasury Regulation 1.409A-1(b)(9)(iii)(A)(1) and any Internal Revenue Service guidance issued with respect thereto; or (ii) the maximum amount that may be taken into account under a
qualified plan pursuant to Section 401(a)(17) of the Code for the year in which Executive’s employment is terminated. 

7. Successors. 
 (a) The Company’s Successors. Any successor to the Company (whether direct or indirect and whether by purchase, merger, consolidation, liquidation or otherwise) to all or substantially all of
the Company’s business and/or assets will assume the obligations under this Agreement and agree expressly to perform the obligations under this Agreement in the same manner and to the same extent as the Company would be required to perform such
obligations in the absence 

  
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of a succession. For all purposes under this Agreement, the term “Company” will include any successor to the Company’s business and/or assets which executes and delivers the
assumption agreement described in this Section 8(a) or which becomes bound by the terms of this Agreement by operation of law. 
 (b) Executive’s Successors. The terms of this Agreement and all rights of Executive hereunder will inure to the benefit of, and be enforceable by, Executive’s personal or legal
representatives, executors, administrators, successors, heirs, distributees, devisees and legatees. 
 8. Notice.

 (a) General. Notices and all other communications contemplated by this Agreement will be in writing and will be deemed
to have been duly given when personally delivered or when mailed by U.S. registered or certified mail, return receipt requested and postage prepaid. In the case of Executive, mailed notices will be addressed to him or her at the home address which
he or she most recently communicated to the Company in writing. In the case of the Company, mailed notices will be addressed to its corporate headquarters, and all notices will be directed to the General Counsel of the Company. 

(b) Notice of Termination. Any termination by the Company for Cause or by Executive for Good Reason or as a result of a voluntary
resignation will be communicated by a notice of termination to the other party hereto given in accordance with Section 8(a) of this Agreement. Such notice will indicate the specific termination provision in this Agreement relied upon, will set
forth in reasonable detail the facts and circumstances claimed to provide a basis for termination under the provision so indicated, and will specify the termination date (which will be not more than thirty (30) days after the giving of such
notice). The failure by Executive to include in the notice any fact or circumstance which contributes to a showing of Involuntary Termination will not waive any right of Executive hereunder or preclude Executive from asserting such fact or
circumstance in enforcing Executive’s rights hereunder. 
 9. Arbitration. 

(a) The Company and Executive each agree that any and all disputes arising out of the terms of this Agreement, Executive’s
employment by the Company, Executive’s service as an officer or director of the Company, or Executive’s compensation and benefits, their interpretation and any of the matters herein released, will be subject to binding arbitration under
the arbitration rules set forth in California Code of Civil Procedure Sections 1280 through 1294.2, including Section 1281.8 (the “Act”), and pursuant to California law. Disputes that the Company and Executive agree to
arbitrate, and thereby agree to waive any right to a trial by jury, include any statutory claims under local, state, or federal law, including, but not limited to, claims under Title VII of the Civil Rights Act of 1964, the Americans with
Disabilities Act of 1990, the Age Discrimination in Employment Act of 1967, the Older Workers Benefit Protection Act, the Sarbanes-Oxley Act, the Worker Adjustment and Retraining Notification Act, the California Fair Employment and Housing Act, the
Family and Medical Leave Act, the California Family Rights Act, the California Labor Code, claims of harassment, discrimination, and wrongful termination, and any statutory or common law claims. The Company and Executive further understand that this
agreement to arbitrate also applies to any disputes that the Company may have with Executive. 

  
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 (b) Procedure. The Company and Executive agree that any arbitration will be
administered by Judicial Arbitration & Mediation Services, Inc. (“JAMS”), pursuant to its Employment Arbitration Rules & Procedures (the “JAMS Rules”). The Arbitrator will have the power to decide
any motions brought by any party to the arbitration, including motions for summary judgment and/or adjudication, motions to dismiss and demurrers, and motions for class certification, prior to any arbitration hearing. The Arbitrator will have the
power to award any remedies available under applicable law, and the Arbitrator will award attorneys’ fees and costs to the prevailing party, except as prohibited by law. The Company will pay for any administrative or hearing fees charged by the
Arbitrator or JAMS except that Executive will pay any filing fees associated with any arbitration that Executive initiates, but only so much of the filing fees as Executive would have instead paid had he or she filed a complaint in a court of law.
The Arbitrator will administer and conduct any arbitration in accordance with California law, including the California Code of Civil Procedure, and the Arbitrator will apply substantive and procedural California law to any dispute or claim, without
reference to rules of conflict of law. To the extent that the JAMS Rules conflict with California law, California law will take precedence. The decision of the Arbitrator will be in writing. Any arbitration under this Agreement will be conducted in
Santa Clara County, California 
 (c) Remedy. Except as provided by the Act and this Agreement, arbitration will be the
sole, exclusive, and final remedy for any dispute between Executive and the Company. Accordingly, except as provided for by the Act and this Agreement, neither Executive nor the Company will be permitted to pursue court action regarding claims that
are subject to arbitration. 
 (d) Administrative Relief. Executive understands that this Agreement does not prohibit him
or her from pursuing any administrative claim with a local, state, or federal administrative body or government agency that is authorized to enforce or administer laws related to employment, including, but not limited to, the Department of Fair
Employment and Housing, the Equal Employment Opportunity Commission, the National Labor Relations Board, or the Workers’ Compensation Board. This Agreement does, however, preclude Executive from pursuing court action regarding any such claim,
except as permitted by law. 
 (e) Voluntary Nature of Agreement. Each of the Company and Executive acknowledges and
agrees that such party is executing this Agreement voluntarily and without any duress or undue influence by anyone. Executive further acknowledges and agrees that he or she has carefully read this Agreement and has asked any questions needed for him
or her to understand the terms, consequences, and binding effect of this Agreement and fully understand it, including that Executive is waiving his or her right to a jury trial. Finally, Executive agrees that he or she has been
provided an opportunity to seek the advice of an attorney of his or her choice before signing this Agreement 

  
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 10. Miscellaneous Provisions. 

(a) No Duty to Mitigate. Executive will not be required to mitigate the amount of any payment contemplated by this Agreement, nor
will any such payment be reduced by any earnings that Executive may receive from any other source. 
 (b) Waiver. No
provision of this Agreement will be modified, waived or discharged unless the modification, waiver or discharge is agreed to in writing and signed by Executive and by an authorized officer of the Company (other than Executive). No waiver by either
party of any breach of, or of compliance with, any condition or provision of this Agreement by the other party will be considered a waiver of any other condition or provision or of the same condition or provision at another time. 

(c) Headings. All captions and section headings used in this Agreement are for convenient reference only and do not form a part of
this Agreement. 
 (d) Entire Agreement. This Agreement constitutes the entire agreement of the parties hereto and
supersedes in their entirety all prior representations, understandings, undertakings or agreements (whether oral or -written and whether expressed or implied) of the parties with respect to the subject matter hereof. No waiver, alteration, or
modification of any of the provisions of this Agreement will be binding unless in writing and signed by duly authorized representatives of the parties hereto and which specifically mention this Agreement. 

(e) Choice of Law. The validity, interpretation, construction, and performance of this Agreement will be governed by the laws of
the State of California (with the exception of its conflict of laws provisions). Any claims or legal actions by one party against the other arising out of the relationship between the parties contemplated herein (whether or not arising under this
Agreement) will be commenced or maintained in any state or federal court located in Santa Clara County, California, and Executive and the Company hereby submit to the jurisdiction and venue of any such court. 

(f) Severability. The invalidity or unenforceability of any provision or provisions of this Agreement will not affect the validity
or enforceability of any other provision hereof, which will remain in full force and effect. 
 (g) Withholding. All
payments made pursuant to this Agreement will be subject to withholding of applicable income and employment taxes. 
 (h)
Counterparts. This Agreement may be executed in counterparts, each of which will be deemed an original, but all of which together will constitute one and the same instrument. 

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

									
	COMPANY:	 		 		 	
				
	GIGAMON LLC	 		 		 	
					
	By:	 	 /s/ Paul Shinn
	 		 	Date:	 	 10/10/12

					
	Title:	 	 General Counsel
	 		 		 	
				
	EXECUTIVE:	 		 		 	
				
	 /s/ Mike Hoffman
	 		 	Date:	 	 9/17/12

	Mike Hoffman	 		 		 	


  
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 GIGAMON LLC 
 AMENDMENT TO MICHAEL HOFFMAN EMPLOYMENT AGREEMENT 
 This amendment (the
“Amendment”) is made by and between Michael Hoffman (“Executive”) and Gigamon LLC. (the “Company”, and together with Executive, the “Parties”) on
March 13, 2013. 
 WHEREAS, the Parties previously entered into an Change in Control Severance Agreement, dated
[DATE] (the “Agreement”); and 
 WHEREAS, the Company and Executive desire to amend the agreement
regarding the amount of severance payable in the event of a qualifying termination during the change of control period. 

NOW, THEREFORE, for good and valuable consideration, Executive and the Company agree that the Agreement is hereby amended as
follows: 
 11. Section 3(b)(i) of the Agreement is amended to read in its entirety as follows: 

“(i) Severance Payment. Executive will receive a lump-sum payment (less applicable withholding taxes) equal to one-half of
Executive’s annual total On Target Earnings (consisting of base salary, annual bonus at target and annual target commissions) as in effect immediately prior to Executive’s termination date or, if greater, as in effect immediately prior to
the Change in Control. Such lump-sum amount shall be payable on the effective date of the Release specified in Section 4(a) or such later time as required by Section 4(c).” 

12. Full Force and Effect. To the extent not expressly amended hereby, the Agreement shall remain in full force and effect.

 13. Entire Agreement. This Amendment and the Agreement constitute the full and entire understanding and agreement
between the Parties with regard to the subjects hereof and thereof. This Amendment may be amended at any time only by mutual written agreement of the Parties. 
 14. Counterparts. This Amendment may be executed in counterparts, all of which together shall constitute one instrument, and each of which may be executed by less than all of the parties to this
Amendment. 
 15. Governing Law. This Amendment will be governed by the laws of the State of California (with the
exception of its conflict of laws provisions). 
 [Signature Page Follows] 

  
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 IN WITNESS WHEREOF, each of the Parties has executed this Amendment, in the case of
the Company by its duly authorized officer, as of the date set forth above. 
  

									
	COMPANY	 		 	GIGAMON LLC
				
		 		 		 	 /s/ Paul Hooper

					
		 		 		 	By:	 	 Paul Hooper

					
		 		 		 	Title:	 	 CEO

			
	EXECUTIVE	 		 	MICHAEL HOFFMAN
				
		 		 		 	 /s/ Michael Hoffman



  
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