Document:

Change of Control Agreement dated as of September 4, 2012

 Exhibit 10.1 
 CHANGE OF CONTROL AGREEMENT 
 THIS CHANGE OF CONTROL AGREEMENT
(“Agreement”) is made as of the 4th day of
September, 2012, by and among PINNACLE BANK (the “Bank”), a Tennessee state bank; PINNACLE FINANCIAL PARTNERS, INC., a bank holding company incorporated under the laws of the State of Tennessee (the “Company”) (collectively, the
Bank and the Company are referred to hereinafter as the “Employer”), and JOSEPH HARVEY WHITE, a resident of the State of Tennessee (the “Executive”). 
 RECITALS: 
 The Employer desires to enter into an agreement with the Executive to
provide the Executive with certain benefits in the event that the Executive’s employment with the Employer is terminated in certain scenarios following a Change of Control (as defined below). 

In consideration of the above premises and the mutual agreements hereinafter set forth, the parties hereby agree as follows: 

1. DEFINITIONS. Whenever used in this Agreement, the following terms and their variant forms shall have the meaning set forth below: 

1.1. “AGREEMENT” shall mean this Agreement and any exhibits incorporated herein together with any amendments hereto made in the
manner described in this Agreement. 
 1.2. “AFFILIATE” shall mean any business entity which controls the Company, is
controlled by or is under common control with the Company. 
 1.3. “BUSINESS OF THE EMPLOYER” shall mean the business
conducted by the Employer, which is the business of commercial banking. 
 1.4. “CAUSE” shall mean: 

1.4.1. With respect to termination by the Employer following a Change of Control: 

(a) a material breach of the terms of this Agreement by the Executive, including, without limitation, failure by the
Executive to comply with the provisions of Section 2.1, which remains uncured after the expiration of thirty (30) days following the delivery of written notice of such breach to the Executive by Employer. Such notice shall
(i) specifically identify the provisions of this Agreement that the Board of Directors of either the Company or the Bank believes that the Executive has failed to comply with, (ii) state the facts upon which such Board of Directors made
such determination, and (iii) be approved by a resolution passed by two-thirds (2/3) of the directors then in office; 

 (b) conduct by the Executive that amounts to fraud, dishonesty or willful
misconduct in the performance of his duties and responsibilities as an employee of the Company or the Bank; 

(c) failure by the Executive to perform his duties and responsibilities as an employee of the Company or the Bank which
remains uncured after the expiration of thirty (30) days following the delivery of written notice of such failure to the Executive by Employer. Such notice shall (i) state the facts upon which such Board of Directors made such
determination, and (ii) be approved by a resolution passed by two-thirds (2/3) of the directors then in office; 
 (d) arrest for, charged in relation to (by criminal information, indictment or otherwise), or conviction of the Executive during the Term of this Agreement of a crime involving breach of trust or moral
turpitude; 
 (e) conduct by the Executive that amounts to gross and willful insubordination or inattention to
his duties and responsibilities as an employee of the Company or the Bank; 
 (f) conduct by the Executive that
results in removal from his position as an officer or executive of Employer pursuant to a written order by any regulatory agency with authority or jurisdiction over Employer. 

1.4.2. With respect to termination by the Executive following a Change of Control: 

(a) a material modification to the Executive’s job title(s) or position(s) of responsibility or the scope of his
authority or responsibilities as an employee of the Company or the Bank without the Executive’s written consent; 
 (b) an adverse change in supervision so that the Executive no longer reports directly to the individual serving as the Chief Executive Officer of the publicly-held parent company of the Bank, which change
in supervision is effected without the Executive’s written consent; 
 (c) an adverse change in overall
supervisory authority which change in supervisory authority is effected without the Executive’s written consent; 
 (d) any change in the Executive’s office location such that the Executive is required to report regularly to a location that is beyond a 25-mile radius from the Executive’s office location
determined immediately after the Effective Date, which change in office location is effected without the Executive’s written consent; 
 (e) any material reduction in the Executive's salary, bonus opportunity or other benefits from the level in effect immediately prior to such reduction; and 

  
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 (f) any giving of notice of non-renewal of this Agreement by the Human
Resources and Compensation Committee of the Board of Directors of Employer. 
 provided, that within 30 days following the initial occurrence of
any of the conditions listed in 1.4.1(a) to (e) above, the Executive shall have provided notice to the Company of the existence of such condition, and the Company shall not have remedied the condition to the reasonable satisfaction of Executive
within 30 days of receiving such notice. 
 1.5. “CHANGE OF CONTROL” means any one of the following events:

 (a) the acquisition by any person or persons acting in concert of the then outstanding voting securities of
either the Bank or the Company, if, after the transaction, the acquiring person (or persons) owns, controls or holds with power to vote forty percent (40%) or more of any class of voting securities of either the Bank or the Company, as the case
may be; 
 (b) within any twelve-month period (beginning on or after the Effective Date) the persons who were
directors of either the Bank or the Company immediately before the beginning of such twelve-month period (the “Incumbent Directors”) shall cease to constitute at least a majority of such board of directors; provided that any director who
was not a director as of the Effective Date shall be deemed to be an Incumbent Director if that director were elected to such board of directors by, or on the recommendation of or with the approval of, at least two-thirds of the directors who then
qualified as Incumbent Directors; and provided further that no director whose initial assumption of office is in connection with an actual or threatened election contest (as such terms are used in Rule 14a-11 of Regulation 14A promulgated under the
Securities Exchange Act of 1934) relating to the election of directors shall be deemed to be an Incumbent Director; 
 (c) a reorganization, merger or consolidation, with respect to which persons who were the stockholders of the Bank or the Company, as the case may be, immediately prior to such reorganization, merger or
consolidation do not, immediately thereafter, own more than fifty percent (50%) of the combined voting power entitled to vote in the election of directors of the reorganized, merged or consolidated company’s then outstanding voting
securities; or 
 (d) the sale, transfer or assignment of all or substantially all of the assets of the Company
and its subsidiaries to any third party. 
 1.6. “COMPANY INFORMATION” means Confidential Information and Trade
Secrets. 
 1.7. “CONFIDENTIAL INFORMATION” means data and information relating to the business of the Bank or the
Company (which does not rise to the status of a Trade Secret) which is or has been disclosed to the Executive or of which the Executive became aware as a consequence of or through the Executive’s relationship to the Employer and which has value
to 

  
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the Employer and is not generally known to its competitors. Confidential Information shall not include any data or information that has been voluntarily disclosed to the public by the Employer
(except where such public disclosure has been made by the Executive without authorization) or that has been independently developed and disclosed by others, or that otherwise enters the public domain through lawful means. 

1.8. “EFFECTIVE DATE” shall mean the date September 4, 2012. 

1.9. “INITIAL TERM” shall mean that period of time commencing on September 4, 2012 (the “Beginning Date”) and
running until December 31, 2012. 
 1.10. “TERM” shall mean the last day of the Initial Term or most recent
subsequent renewal period. 
 1.11. “TRADE SECRETS” means Employer information including, but not limited to,
technical or nontechnical data, formulas, patterns, compilations, programs, devices, methods, techniques, drawings, processes, financial data, financial plans, product plans or lists of actual or potential customers or suppliers which: 

(a) derives economic value, actual or potential, from not being generally known to, and not being readily ascertainable by
proper means by, other persons who can obtain economic value from its disclosure or use; and 
 (b) is the
subject of efforts that are reasonable under the circumstances to maintain its secrecy. 
 2. LIMIT ON SERVICES. 

2.1. FULL-TIME STATUS. During the Term of this Agreement, the Executive shall: 

(a) devote substantially all of his time, energy and skill during regular business hours to the performance of the duties
of his employment (reasonable vacations and reasonable absences due to illness excepted) and faithfully and industriously perform such duties; 
 (b) diligently follow and implement all reasonable and lawful management policies and decisions communicated to him by the Board of Directors of either the Bank or the Company; and 

(c) timely prepare and forward to the Board of Directors of either the Bank or the Company all reports and accountings as
may be requested of the Executive. 
 2.2. PERMITTED ACTIVITIES. The Executive shall devote his entire business time, attention
and energies to the Business of the Employer and shall not during the Term be engaged (whether or not during normal business hours) in any other business or professional activity, whether or not such activity is pursued for gain, profit or other
pecuniary advantage; but this shall not be construed as preventing the Executive from: 
 (a) investing his
personal assets in businesses which (subject to clause (b) below) are not in competition with the Business of the Employer and which will not require any services on the part of the Executive in their operation or affairs and in which his
participation is solely that of an investor; 

  
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 (b) purchasing or otherwise acquiring an ownership interest in any entity
provided that such interest shall not result in him collectively owning beneficially at any time five percent (5%) or more of any entity, or to the extent applicable, five percent (5%) or more of the stock, capital or profits of any entity
in competition with the Business of the Employer; and 
 (c) participating in civic and professional affairs and
organizations and conferences, preparing or publishing papers or books or teaching so long as the Company’s and the Bank’s Chief Executive Officer approves of such activities prior to the Executive’s engaging in them. 

Notwithstanding the foregoing provisions of this Section 2.2, the Executive may provide services to any entity and may engage in such additional
investment activities to the extent such services and such additional investment activities have been expressly approved in writing by the Company’s and the Bank’s Chief Executive Officer. 

2.3. TERM. This Agreement shall remain in effect for the Term. While this Agreement remains in effect it shall automatically renew each
year for a twelve month period on January 1 unless, prior to the November 30 immediately preceding such renewal, the Human Resources and Compensation Committee of the Employer or the Executive gives written notice to the other of its
intent that the automatic renewals shall cease. In the event such notice of non-renewal is properly given, this Agreement and the Term shall expire on the thirtieth (30th) day following the date such written notice is received. Notwithstanding
the foregoing, in the event that prior to the earlier of a Change of Control or the Company entering into an agreement providing for a Change of Control, the Executive shall cease to serve as Chief Credit Officer/Chairman Knoxville or the Chief
Executive Officer or the Human Resources and Compensation Committee shall determine, in their sole discretion, that it is no longer appropriate to provide the Executive the post Change of Control benefits provided hereunder, this Agreement may be
terminated by ten (10) days written notice from the Chief Executive Officer or from the Human Resources and Compensation Committee. 
 3.
CHANGE OF CONTROL. 
 3.1. CHANGE OF CONTROL. If, within twelve (12) months following a Change of Control, the Employer
terminates Executive’s employment without Cause or the Executive terminates his employment with the Employer for Cause within twelve (12) months following a Change of Control, the Executive, or in the event of his subsequent death, his
designated beneficiaries or his estate, as the case may be, shall receive, as liquidated damages, in lieu of all other claims, a severance payment equal to two (2) times the Executive’s then current base salary and target bonus amount to
be paid in full on the last day of the month following the date of termination. The Executive and his immediate family will continue to receive the health insurance plan benefits then in effect for employees of the Company and/or the Bank for a
period 

  
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of three years to include payment of the Employer funded portion of the plan. The Executive will also receive tax assistance, advice and filing preparation services from a qualified accounting
firm of his choice for a period of three years at a cost to the Company and/or the Bank not to exceed $2,500 per year. 
 3.2.
EFFECT OF TERMINATION. Upon termination of this Agreement, the Employer shall have no further obligations to the Executive or the Executive’s estate with respect to this Agreement, except for the payment of amounts due under Section 3.1,
if owed. Nothing contained herein shall limit or impinge upon any other rights or remedies of the Employer or the Executive under any other agreement or plan to which the Executive is a party or of which the Executive is a beneficiary. 

3.3. SECTION 409A MATTERS. It is intended that (i) each payment provided under this Agreement is a separate “payment” for
purposes of Code Section 409A and (ii) that the payments satisfy, to the greatest extent possible, the exemptions from the application of Code Section 409A, including those provided under Treasury Regulations 1.409A-1(b)(4) (regarding
short-term deferrals), 1.409A-1(b)(9)(iii) (regarding the two-times, two year exception), and 1.409A-1(b)(9)(v) (regarding reimbursements and other separation pay). Notwithstanding anything to the contrary in this Agreement, if the Employer
determines (i) that on the date of Executive’s separation from service or at such other time that the Employer determines to be relevant, the Executive is a “specified employee” (as such term is defined under Treasury Regulation
1.409A-1(i)(1)) of the Employer and (ii) that any payments to be provided to the Executive pursuant to this Agreement are or may become subject to the additional tax under Code Section 409A(a)(1)(B) or any other taxes or penalties imposed
under Code Section 409A (“Section 409A Taxes”) if provided at the time otherwise required under this Agreement, then such payments shall be delayed until the date that is six (6) months after the date of the Executive’s
separation from service with the Employer, or such shorter period that, as determined by the Employer, is sufficient to avoid the imposition of Section 409A Taxes. Any payments delayed pursuant to this Section 3.3 shall be made in a lump
sum on the first day of the seventh month following the Executive’s separation from service, or such earlier date that, as determined by the Employer, is sufficient to avoid the imposition of any Section 409A Taxes. 

4. COMPANY INFORMATION. 
 4.1.
OWNERSHIP OF COMPANY INFORMATION. All Company Information received or developed by the Executive while employed by the Employer will remain the sole and exclusive property of the Employer. 

4.2. OBLIGATIONS OF THE EXECUTIVE. The Executive agrees: 

(a) to hold Company Information in strictest confidence; 

(b) not to use, duplicate, reproduce, distribute, disclose or otherwise disseminate Company Information or any physical
embodiments of Company Information; and 

  
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 (c) in any event, not to take any action causing or fail to take any action
necessary in order to prevent any Company Information from losing its character or ceasing to qualify as Confidential Information or a Trade Secret. 
 In the event that the Executive is required by law to disclose any Company Information, the Executive will not make such disclosure unless (and then only to the extent that) the Executive has been advised
by independent legal counsel that such disclosure is required by law and then only after prior written notice is given to the Company when the Executive becomes aware that such disclosure has been requested and is required by law. This
Section 4 shall survive for a period of twelve (12) months following termination of this Agreement for any reason with respect to Confidential Information, and shall survive termination of this Agreement for any reason for so long as is
permitted by applicable law, with respect to Trade Secrets. 
 4.3. DELIVERY UPON REQUEST OR TERMINATION. Upon request by the
Employer, and in any event upon termination of his employment with the Employer, the Executive will promptly deliver to the Employer all property belonging to the Employer, including, without limitation, all Company Information then in his
possession or control. The Executive agrees that the covenants contained in Section 4 of this Agreement are of the essence of this Agreement; that the covenants are reasonable and necessary to protect the business, interests and properties of
the Employer. 
 5. SEVERABILITY. The parties agree that each of the provisions included in this Agreement is separate, distinct and severable
from the other provisions of this Agreement and that the invalidity or unenforceability of any Agreement provision shall not affect the validity or enforceability of any other provision of this Agreement. Further, if any provision of this Agreement
is ruled invalid or unenforceable by a court of competent jurisdiction because of a conflict between the provision and any applicable law or public policy, the provision shall be redrawn to make the provision consistent with and valid and
enforceable under the law or public policy. 
 6. NO SET-OFF BY THE EXECUTIVE. The existence of any claim, demand, action or cause of action by
the Executive against the Employer, or any Affiliate of the Employer, whether predicated upon this Agreement or otherwise, shall not constitute a defense to the enforcement by the Employer of any of its rights hereunder. 

7. NOTICE. All notices and other communications required or permitted under this Agreement shall be in writing and, if mailed by prepaid first-class mail
or certified mail, return receipt requested, shall be deemed to have been received on the earlier of the date shown on the receipt or three (3) business days after the postmarked date thereof. In addition, notices hereunder may be delivered by
hand or overnight courier, in which event the notice shall be deemed effective when delivered. All notices and other communications under this Agreement shall be given to the parties hereto at the following addresses: 

 

	 	(i)	If to the Employer, to it at: 

Suite 900 
 150
Third Avenue South 
 Nashville, TN 37201 

  
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	 	(ii)	If to the Executive, to him at: 

The most recent mailing address of the Executive that the Employer has on record. 

Either party may notify the other in writing in the event of a change in the address for such notice. 

8. ASSIGNMENT. Neither party hereto may assign or delegate this Agreement or any of its rights and obligations hereunder without the written consent of
the other party to this Agreement. 
 9. WAIVER. A waiver by one party to this Agreement of any breach of this Agreement by the other party to
this Agreement shall not be effective unless in writing, and no waiver shall operate or be construed as a waiver of the same or another breach on a subsequent occasion. 
 10. ARBITRATION. Any controversy or claim arising out of or relating to this contract, or the breach thereof, shall be settled by binding arbitration in accordance with the Commercial Arbitration Rules of
the American Arbitration Association. Judgment upon the award rendered by the arbitrator may be entered only in a state court of Tennessee or the federal court for the Middle District of Tennessee. The Employer and the Executive agree to share
equally the fees and expenses associated with the arbitration proceedings. 
 11. ATTORNEYS’ FEES. In the event that the parties have
complied with this Agreement with respect to arbitration of disputes and litigation ensues between the parties concerning the enforcement of an arbitration award, the party prevailing in such litigation shall be entitled to receive from the other
party all reasonable costs and expenses, including without limitation attorneys’ fees, incurred by the prevailing party in connection with such litigation, and the other party shall pay such costs and expenses to the prevailing party promptly
upon demand by the prevailing party. 
 12. APPLICABLE LAW. This Agreement shall be construed and enforced under and in accordance with the laws
of the State of Tennessee. 
 13. INTERPRETATION. Words importing any gender include all genders. Words importing the singular form shall
include the plural and vice versa. The terms “herein”, “hereunder”, “hereby”, “hereto”, “hereof” and any similar terms refer to this Agreement. Any captions, titles or headings preceding the text of
any article, section or subsection herein are solely for convenience of reference and shall not constitute part of this Agreement or affect its meaning, construction or effect. 
 14. ENTIRE AGREEMENT. This Agreement embodies the entire and final agreement of the parties on the subject matter stated in this Agreement. No amendment or modification of this Agreement shall be valid or
binding upon the Employer or the Executive unless made in writing and signed by both parties. All prior understandings and agreements relating to the subject matter of this Agreement are hereby expressly terminated and superseded. 

  
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 15. RIGHTS OF THIRD PARTIES. Nothing herein expressed is intended to or shall be construed to confer upon or
give to any person, firm or other entity, other than the parties hereto and their permitted assigns, any rights or remedies under or by reason of this Agreement. 
 16. BINDING AGREEMENT. This Agreement shall inure to the benefit of and be binding upon the Executive, his heirs and personal representatives, the Bank and the Company and their respective successors and
permitted assigns. 
 17. SURVIVAL. The obligations of the Executive pursuant to Section 4 shall survive the termination of the employment
of the Executive hereunder for the period designated under each of those respective sections. 
 18. JOINT AND SEVERAL. The obligations of the
Bank and the Company to the Executive hereunder shall be joint and several. 
 [Remainder of Page Intentionally Left Blank]

  
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 IN WITNESS WHEREOF, the Employer and the Executive have executed and delivered this
Agreement as of the date first shown above. 
  

			
	THE BANK:
	
	PINNACLE BANK
		
	By:	 	 /s/ Hugh M. Queener

			
	Print Name:	 	HUGH M. QUEENER

 
			
	Title: SECRETARY, CHIEF ADMINISTRATION OFFICER
	
	THE COMPANY:
	
	PINNACLE FINANCIAL PARTNERS, INC.
		
	By:	 	 /s/ Hugh M. Queener

			
	Print Name:	 	HUGH M. QUEENER

 
			
	Title: SECRETARY, CHIEF ADMINISTRATION OFFICER
	
	THE EXECUTIVE:
	
	 /s/ Joseph Harvey White

	JOSEPH HARVEY WHITE

  
 10Letter Agreement

 Exhibit 10.1 
 GSI Group, Inc. 
 125 Middlesex Turnpike 

Bedford, MA 01730 

September 4, 2012 
 Mr. David Clarke

 c/o GSI Group, Inc. 
 125 Middlesex
Turnpike 
 Bedford, MA 01730 
 Re: Termination of Employment 
 Dear David: 

This letter agreement (the “Letter Agreement”) sets forth the understanding between you and GSI Group, Inc., a company
organized under the laws of the Province of New Brunswick, Canada (together with its subsidiaries and affiliates, the “Company”), regarding your termination of employment with the Company and is entered into on the date set forth on
the signature page hereto. 
 1. Your last day of active employment with the Company shall be September 28, 2012 (or such
other date as mutually agreed by the parties hereto) (the “Termination Date”). At the Company’s request, effective as of the Termination Date, you hereby agree to resign as an officer and/or director of the Company and any of
the Company’s subsidiaries, affiliates, joint ventures and other related entities (including, without limitation, the Company’s Synrad, Inc., Continuum Electro-Optics, Inc., Quantronix Corp., JK Laser, Control Laser Corp. and Baublys
Control Laser businesses). On the Termination Date, the Company shall pay you (a) all earned but unpaid base salary up to and through the Termination Date, and (b) all accrued but unused vacation up to and through the Termination Date. The
Company also will reimburse you for all appropriately documented business expenses incurred prior to the Termination Date in accordance with the Company’s policy; provided that you submit all necessary or appropriate documentation of any
such expenses within ten (10) days of the Termination Date. 
 2. Subject to your execution and non-revocation of the
Release of Claims Agreement attached hereto as Exhibit A (the “Release”) at such time as is described in this Section 2, you shall be entitled to: 
 (a) Continued payment of your base salary, at the rate in effect immediately prior to the Termination Date, during the period beginning on the Termination Date and ending on the first anniversary of the
Termination Date (such payment, the “Severance Payment” and such period, the “Severance Period”), payable in equal installments during the Severance Period in accordance with the Company’s customary payroll
practices; 

 (b) A cash payment in an aggregate amount equal to $130,000, payable in two equal
installments at the same times as you would have been entitled to receive such installments as a bonus in respect of the second half of 2012 and first half of 2013 pursuant to the terms of the Senior Management Incentive Plan (or comparable plan for
2013) (which are expected to be in March 2013 and August 2013), but in no event prior to January 1, 2013 or later than December 31, 2013; and 
 (c) If you elect to continue medical coverage under the Company’s group health plan in accordance with COBRA, continued participation in the Company’s group health plan in which you were
participating as of the Termination Date, with the then-current Company premium subsidy applicable to employees, during period beginning on the Termination Date and ending on the earlier of (i) the last day of the Severance Period, and
(ii) the date on which you first become eligible for medical coverage from a new employer or service recipient. The COBRA health continuation period under Section 4980B of the Internal Revenue Code of 1986, as amended, shall run
concurrently with the period of continued medical coverage following the Termination Date set forth in this Section 2(c). 
 Notwithstanding anything to the contrary in this Letter Agreement or the Release, (x) you shall not be entitled to any payments or benefits under this Section 2 unless and until you execute the
Release on or prior to the 21st day following the date you
receive the Release (the “Release Expiration Date”) and do not revoke your execution of the Release thereafter (and the applicable revocation period has expired) and (y) to the extent any payments or benefits due under the
Letter Agreement are not paid or provided when due as result of the immediately preceding subsection (x), such payments and benefits shall be paid or provided in a lump sum on the first payroll date to occur on or after the thirtieth (30th) day
following the Termination Date. 
 3. In addition to the post-termination benefits described in Section 2, and
notwithstanding anything to the contrary in those certain Restricted Stock Unit Grant Notices and Restricted Stock Unit Award Agreements between you and the Company, dated March 31, 2011 and March 8, 2012 (collectively, the “RSU
Agreements”), (a) as of the Termination Date, 10,000 unvested restricted stock units granted under the RSU Agreements (the “Unvested RSUs”) shall remain outstanding and unvested, (b) subject to your execution of
the Release on or prior to the Release Expiration Date and the lapse of any revocation period related thereto, the Unvested RSUs shall become vested on the thirtieth (30th) day following the Termination Date, and (c) to the extent you do
not execute the Release on or prior to the Release Expiration Date or timely revoke the execution of such Release thereafter, the Unvested RSUs shall be automatically forfeited by you on the thirtieth (30th) day following the Termination Date
without payment of any consideration by the Company, and you (or your beneficiary or personal representative, as the case may be) shall have no further rights with respect to the Unvested RSUs. For the avoidance of doubt, all unvested restricted
stock units granted under the RSU Agreements other than the Unvested RSUs shall be automatically forfeited, terminated and canceled as of the Termination Date pursuant to terms of the RSU Agreements. 

4. You agree not to disparage the Company, any of its products or practices, or any of its directors, officers, agents, representatives
or affiliates, either orally or in writing, at any time; provided that you may confer in confidence with your legal representatives and make truthful statements as required by law. The Company agrees that, upon the termination of your

  
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employment, it shall advise its current directors and officers not to disparage you, either orally or in writing, at any time; provided that such persons may confer in confidence with the
Company’s and their legal representatives and make truthful statements as required by law. In addition, you acknowledge and agree that you currently are and, on and after Termination Date, shall remain, subject to all restrictive covenants set
forth in the RSU Agreements. 
 5. Notwithstanding anything to the contrary in this Letter Agreement, in the event that you
violate any of the restrictive covenants set forth or described in Section 4 (including, without limitation, those set forth in the RSU Agreements), (a) the Company shall no longer be required to provide any payments or benefits under this
Letter Agreement and (b) you shall pay the Company an amount equal to the sum of (i) all payments and benefits provided in this Letter Agreement prior to such violation (including, without limitation, the applicable portion of the
Severance Payment) and (ii) the greater of (A) the fair market value of a number of shares of common stock of the Company equal to the number of Unvested RSUs on the Termination Date or (B) the fair market value of a number of shares
of common stock of the Company equal to the number of Unvested RSUs on the date on which you first violate such restrictive covenants. 
 6. You agree to sign and be bound by the Release, which shall be considered an integral part of this Letter Agreement. 
 7. In order to effectuate the foregoing, you agree to execute any additional documents as may be reasonably requested from time to time by the Company. Except as set forth in this Letter Agreement and the
Release, the RSU Agreements will remain in full force and effect. 
 8. Because your employment with the Company was terminated
involuntarily for other than gross misconduct, the Company acknowledges and agrees that it will not contest your eligibility for unemployment compensation. 
 * * * * * * 

  
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 Please indicate your acceptance of the terms and provisions of this Letter Agreement and
the Release by signing both copies of this Letter Agreement and the Release and returning one copy of each to me. The other copy of each is for your files. By signing below, you acknowledge and agree that you have carefully read this Letter
Agreement and the Release in their entirety; fully understand and agree to their terms and provisions; and intend and agree that the Letter Agreement and Release are final and legally binding on you and the Company. This Letter Agreement shall be
governed, construed, interpreted and enforced in accordance with the substantive laws of the Commonwealth of Massachusetts, without giving effect to any principles of conflicts of law, whether of the Commonwealth of Massachusetts or any other
jurisdiction, and where applicable, the laws of the United States, that would result in the application of the laws of any other jurisdiction. This Letter Agreement may be executed in several counterparts. 

 

	
	Very truly yours,
	
	 /s/ John Roush

	John Roush
	Chief Executive Officer

 Agreed, Acknowledged and Accepted as of the first date set forth above: 

 

	
	 /s/ David Clarke

	David Clarke

 Letter Agreement for David Clarke 

 EXHIBIT A 

RELEASE OF CLAIMS 
 1. General Release. 
 (a) I acknowledge that my employment with GSI
Group, Inc. (the “Company”) and all subsidiaries and affiliates thereof terminated on the Termination Date (as defined in the Letter Agreement (as defined below)). I further acknowledge that the Company delivered this release of
claims (the “Release”) to me on [            ], 2012. 
 (b) In exchange for the payments and benefits described in that certain Letter Agreement by and between the Company and me, dated as of September 4, 2012 (the “Letter Agreement”),
which I agree I am not otherwise entitled to receive absent execution and non-revocation of the Release, I and my representatives, agents, estate, heirs, successors and assigns (“Releasors”) voluntarily agree to release and
discharge the Company and its parents, affiliates, subsidiaries, predecessors, successors, assigns, plan sponsors and plan fiduciaries (and the current and former trustees, officers, directors, employees, and agents of each of the foregoing, all
both individually, in their capacity acting on the Company’s behalf and in their official capacities) (collectively “Releasees”) generally from all claims, demands, actions, suits, damages, debts, judgments and liabilities of
every name and nature, whether existing or contingent, known or unknown, suspected or unsuspected, in law or in equity in connection with my employment by or termination of employment with the Company, or any of my dealings, transactions or events
involving the Releasees, arising on or before the date I execute this Release. This Release is intended by me to be all encompassing and to act as a full and total release of any claims that the Releasors may have or have had against the Releasees
from the beginning of time to the date I execute this Release, including but not limited to, all claims in contract (whether written or oral, express or implied), tort, equity and common law; any claims for wrongful discharge, breach of contract, or
breach of the obligation of good faith and fair dealing; and/or any claims under any local, state or federal constitution, statute, law, ordinance, bylaw, or regulation dealing with either employment, employment discrimination, retaliation, mass
layoffs, plant closings, and/or employment benefits and/or those laws, statutes or regulations concerning discrimination on the basis of race, color, creed, religion, age, sex, sexual harassment, sexual orientation, national origin, ancestry,
handicap or disability, veteran status or any military service or application for military service or any other category protected by law (including, without limitation, all claims under the Age Discrimination in Employment Act (the
“ADEA”), 29 U.S.C. §621 et seq., Title VII of the Civil Rights Act of 1964, 42 U.S.C. § 2000e et seq., the Americans With Disabilities Act of 1990, 42 U.S.C. § 12101 et seq., the Family and Medical Leave Act, 29
U.S.C. § 2601 et seq., the Worker Adjustment and Retraining Notification Act, 29 U.S.C. § 2101 et seq., the Massachusetts Fair Employment Practices Act, M.G.L. c.151B, § 1 et seq., the Massachusetts Civil Rights Act, M.G.L. c.12,
§§ 11H and 11I, the Massachusetts Equal Rights Act, M.G.L. c.93, § 102 and M.G.L. c.214, § 1C, the Massachusetts Labor and Industries Act, M.G.L. c.149, § 1 et seq., and the Massachusetts Privacy Act, M.G.L. c.214, §
1B, all as amended); and any federal, state or local law or regulation concerning securities, stock or stock options. This Release is for any relief, no matter how denominated, including but not limited to wages, back pay, front pay, benefits,
compensatory damages, liquidated damages, punitive damages or attorney’s fees. I also agree not to commence or cooperate in the prosecution or investigation of any lawsuit, administrative action or other claim or complaint against the
Releasees, except as required by law. 

 (c) By this Release, I not only release and discharge the Releasees from any and all claims
as stated above that the Releasors could make on my own behalf or on the behalf of others, but also those claims that might be made by any other person or organization on my behalf and I specifically waive any right to recover any damage awards as a
member of any class in a case in which any claims against the Releasees are made involving any matters arising out of my employment by or termination of employment with the Company, or any of my dealings, transactions or events involving the
Releasees. 
 (d) I agree that, except for any payments or benefits set forth in the Letter Agreement and the RSU Agreements (as
defined in the Letter Agreement) that have not yet been paid, as applicable, the payments and benefits the Company previously provided to me are complete payment, settlement, accord and satisfaction with respect to all obligations and liabilities of
the Releasees to the Releasors, and with respect to all claims, causes of action and damages that could be asserted by the Releasors against the Releasees regarding my employment or termination of employment with the Company, or any of my dealings,
transactions or events involving the Releasees, including, without limitation, all claims for wages, salary, commissions, draws, car allowances, incentive pay, bonuses, business expenses, vacation, stock, stock options, severance pay,
attorneys’ fees, compensatory damages, exemplary damages, or other compensation, benefits, costs or sums. Notwithstanding anything in this Release to the contrary, this Release shall not affect and I do not waive rights to indemnification I may
have under (i) applicable law, (ii) any charter document or bylaws, (iii) any agreement between me and the Company or any other Releasee, (iv) as an insured under any directors’ and officers’ liability insurance policy
now or previously in force, which shall remain in effect in accordance with the terms and provisions thereof. 
 (e) I
understand and agree that this Release will be binding on me and my heirs, administrators and assigns. I acknowledge that I have not assigned any claims or filed or initiated any legal proceedings against any of the Releasees. 

(f) I acknowledge and agree that if any provision of this Release is found, held or deemed by a court of competent jurisdiction to be
void, unlawful or unenforceable under any applicable statute or controlling law, the remainder of this Release shall continue in full force and effect. 
 (g) I acknowledge and agree that I have been advised to consult with or seek advice from an attorney of my choice or any other person of my choosing before executing this Release. 

(h) I acknowledge and agree that, in entering into this Release, I am not relying on any representation, promise or inducement made by
the Company or its attorneys with the exception of those promises described in this Release. 
 (i) This Release is deemed made
and entered into in the Commonwealth of Massachusetts, and in all respects shall be interpreted, enforced and governed under the internal laws of the Commonwealth of Massachusetts, to the extent not preempted by federal law. 

  
 2 

 (j) Notwithstanding the comprehensive release of claims set forth in the preceding
paragraphs of this Section 1, nothing in this Release shall bar or prohibit me from contacting, seeking assistance from or participating in any proceeding before any federal or state administrative agency to the extent permitted by applicable
federal, state and/or local law. However, I nevertheless will be prohibited to the fullest extent authorized by law from obtaining monetary damages in any agency proceeding in which I do so participate. 

2. Waiver of Rights and Claims Under the Age Discrimination in Employment Act of 1967. I acknowledge and agree that I have
been informed that I have or may have specific rights and/or claims under the ADEA and I agree that: 
 (a) In consideration for
the payments and benefits described in the Letter Agreement, which I am not otherwise entitled to receive absent execution and non-revocation of the Release, I specifically and voluntarily waive such rights and/or claims under the ADEA that I have
or might have against the Releasees to the extent such rights and/or claims arose prior to the date I execute this Release; 

(b) I understand that I am not waiving rights or claims under the ADEA which may arise after the date that I execute this Release;

 (c) I have been advised that I have twenty-one (21) days (such period, the “Consideration Period”) to
review this Release and consider its terms before signing it, and I acknowledge and agree that such Consideration Period will not be affected or extended by any changes, whether material or immaterial, that might be made to this Release; and

 (d) I may revoke this Release for a period of seven (7) days after I sign it and all rights and obligations of both
parties under this Release shall not become effective or enforceable until the date upon which the seven (7) day revocation period has expired. For such a revocation to be effective, the Company must receive it on or before the expiration of
the seven (7) day revocation period. 
 * * * * * 

  
 3 

 I acknowledge and agree that this Release is a legally binding document and my signature
will commit me to its terms. I acknowledge and agree that I have carefully read and fully understand all of the provisions of this Release and that I voluntarily enter into this Release by signing below. Upon execution, I agree to deliver a signed
copy of this Release to the Chief Executive Officer of the Company. 
  

	
	  

	David Clarke

 
			
		
	Date:

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