Document:

Services and Support Agreement dated as of March 31, 2006

 Exhibit 10.2 
 SERVICES AND SUPPORT AGREEMENT 
 THIS SERVICES AND SUPPORT AGREEMENT (the “Support
Agreement”) is made as of March 31, 2006, by and between SNB Bancshares, Inc., a Texas corporation (the “Corporation”), and Harvey E. Zinn, an individual residing in Sugar Land, Fort Bend County, Texas (the
“Executive”), and provides as follows: 
 RECITALS 
 WHEREAS, the Corporation and the Executive have entered into that certain Employment Agreement dated July 20, 2004 (the “Employment
Agreement”); and 
 WHEREAS, the Corporation has entered into an Agreement and Plan of Reorganization with Prosperity Bancshares, Inc.,
a Texas corporation (“Prosperity”) dated as of November 16, 2005 (the “Merger Agreement”), pursuant to which the Corporation will merge with and into Prosperity, with Prosperity as the surviving entity (the
“Merger”); and 
 WHEREAS, effective as of the effective time of the Merger, Executive will serve as a director of Prosperity Bank,
a wholly owned subsidiary of Prosperity (“Prosperity Bank”), and in the non-employee position of Chairman, Houston Area; and 
 WHEREAS, as a director of Prosperity Bank, the parties desire that Executive will be actively involved as a director of Prosperity Bank and will maintain a presence at the former Sugar Land, Texas headquarters of the Corporation; and

 WHEREAS, in connection with the Merger, the parties desire to provide for the termination of the Employment Agreement at the effective
time of the Merger in exchange for a cash payment to be made to the Executive as set forth in the Employment Agreement (“Cash Payment”) upon and subject to the terms and provisions herein; 
 NOW, THEREFORE, for and in consideration of the mutual covenants set forth herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties agree as follows: 
 Section 1. Vesting of Stock Options. Immediately prior
to termination of Executive’s employment, pursuant to the terms of the SNB Bancshares, Inc. 2002 Stock Option Plan and the Merger Agreement, all of Executive’s outstanding unvested options to acquire shares of common stock of the
Corporation shall automatically become vested and shall be treated, based on Executive’s election, as set forth in the Merger Agreement. 
 Section 2. Termination of Employment Agreement and Employment. The Corporation and the Executive hereby agree and acknowledge that Executive’s employment and the Employment Agreement, and any modifications or amendments thereof
and any written or oral agreements related thereto, shall be terminated effective at the effective time of the Merger. 
 Section 3.
Service as a Director of Prosperity Bank. Effective as of the effective time of the Merger, Executive will be appointed to serve as a director of Prosperity Bank and to serve in the non-employee position of Chairman, Houston Area. In such
position, Executive 

 
agrees that he will be actively involved as a director of Prosperity Bank and will maintain a presence at the former Sugar Land banking center of Southern
National Bank of Texas (the “Bank”), as well as the other former banking centers of the Bank. 
 Section 4. Acknowledgment of
Cash Payment. 
 (a) Executive hereby acknowledges receipt from the Corporation of $902,700.00 with respect to the items
Executive was entitled to receive pursuant to the Employment Agreement, after limitation pursuant to Section 7.1 of the Employment Agreement, in consideration for termination of the Employment Agreement. 
 (b) If it is established pursuant to a final determination of a court or an Internal Revenue Service proceeding that any payment or
benefit received or to be received by Executive pursuant to the terms of this Agreement or of any other plan, arrangement or agreement of the Corporation (collectively, the “Payments”) would be considered a Golden Parachute payment under
Section 280G and therefore subject to the excise tax imposed by Section 4999 of the Internal Revenue Code of 1986, as amended (the “Code”), Executive hereby agrees to repay to the Corporation within thirty (30) days of
Executive’s receipt of notice of such final determination, an amount of the Payments such that, after such repayment, the total Payments retained by Executive shall not exceed one dollar ($1.00) less than three (3) times Executive’s
base amount (as defined in Section 280G of the Code). 
 Section 5. Release. The Executive, on his own behalf and on behalf of
his heirs, executors, administrators, agents, successors and assigns (collectively, the “Releasor Persons”) hereby irrevocably and unconditionally releases, waives and forever discharges the Corporation and its predecessors, parents,
subsidiaries, affiliates and other related entities, and all of past, present and future officers, directors, shareholders, affiliates, agents, representatives, successors and assigns, other than the Executive and any Releasor Persons (each a
“Released Party” and collectively, the “Released Parties”), from any and all actions, claims, demands, liabilities, responsibilities and/or obligations of every type and nature whatsoever, known and unknown, in law or equity
(each a “Claim” and collectively, the “Claims”) relating to, arising out of or in connection with the Employment Agreement; provided, however, that a Released Party shall not be released from any of its obligations or liabilities
to a Releasor Person (i) as to rights of indemnification pursuant to the articles of incorporation and bylaws of the Corporation or Section 6.10 of the Merger Agreement and (ii) as to rights under any past acts insurance coverage,
including but not limited to, any director and officer insurance policy, effective following the effective time of the Merger. 
 The
Executive acknowledges that through this Support Agreement, he extinguishes any and all Claims against the Released Parties occurring up to the date of this Support Agreement, including, but not limited to, any Claims based upon, arising out of or
relating to the Employment Agreement. 
 The Executive hereby represents and warrants that in his capacity as an employee of the Corporation
and the Bank, the Executive has no knowledge of any Claims that the Executive may have against the Released Parties under the Employment Agreement. 
  

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 Section 6. Successors and Assigns. 
 6.1 Assignment. Executive may not assign his rights or delegate his duties hereunder without the prior written consent of the Corporation. The
Corporation may assign its rights hereunder without the consent of Executive. Any person may succeed to the rights of the Corporation hereunder by operation of law in connection with any merger, consolidation or share exchange involving the
Corporation, and Prosperity shall succeed to the rights of the Corporation hereunder pursuant to the Merger, without the consent of Executive. 
 6.2 Binding Effect. This Support Agreement shall be binding upon and inure to the benefit of the parties hereto and their heirs, successors, legal representatives and permitted assigns, including the Releasor Persons. Except as set
forth in Section 6.1 or this Section 6.2, no person or entity not a party to this Support Agreement shall have rights hereunder as a third party beneficiary or otherwise. 
 Section 7. No Right to Directorship. Nothing contained herein shall be construed as conferring upon Executive the right to continue in the service
on the Board of Directors of Prosperity Bank, and Executive will be subject to re-election as a director of Prosperity Bank when and as required by the Bylaws of Prosperity Bank. 
 Section 8. Governing Law. This Support Agreement shall be governed by and construed in accordance with the laws of the State of Texas, without
giving effect to any principles of conflicts of law. 
 Section 9. Modification. This Support Agreement may be modified only by a
written instrument executed by each of the parties hereto. 
 Section 10. Entire Agreement. This Support Agreement constitutes the
entire agreement and supersedes all prior agreements and understandings, both written and oral, among the parties with respect to the subject matter hereof. Without limiting the foregoing, the Executive expressly acknowledges and confirms that he
has no further rights under the Employment Agreement, and that the Cash Payment received is in full satisfaction thereof. 
 [Signature
page follows] 
  

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 IN WITNESS WHEREOF, the parties have executed this Support Agreement as of the date first written above.

  

					
	EXECUTIVE
		
	By:	 	/s/ Harvey E. Zinn
		 	Harvey E. Zinn
	
	SNB BANCSHARES, INC.
		
	By:	 	/s/ R.D. Brewer
		 	Name:	 	R.D. Brewer
		 	Title:	 	Treasurer & CFO

  

 4Form of Non-Disclosure, Non-Solicitation and Non-Competition Agreement

 Exhibit 10.1 
 NON-DISCLOSURE, NON-SOLICITATION 
 AND NON-COMPETITION 
 AGREEMENT 
 This Non-Disclosure,
Non-Solicitation and Non-Competition Agreement (the “Agreement”) is between TXU Corp., a Texas corporation, and
                                       
  (“Employee”). 
 TXU Corp. and its Affiliates (“TXU”) are beginning a project which will involve
the first development of lignite and coal fired electric generation in Texas in approximately 30 years and the first of such developments since the deregulation of the Texas electric power market (the “Project”); 

In connection with the Project, TXU will provide Employee with certain Confidential Information (as defined below), including specialized knowledge
and insight regarding the manner and method in which TXU plans to develop such coal and lignite fueled generation and operate that portion of its business, and Employee will have access to and use such Confidential Information to assist TXU in
connection with the Project; 
 The Confidential Information that Employee will have access to is a valuable, special, proprietary and unique
asset used by TXU in its businesses and TXU has taken and will continue to take steps to protect the Confidential Information from unauthorized disclosure, which is of critical importance and value to TXU and provides TXU with a competitive
advantage in connection with the Project; and 
 TXU would suffer irreparable harm if Employee were to use or enable others to use such
Confidential Information in competition with TXU in Texas or other system control areas where there is or will be competition in the supply of electric power. 
 THEREFORE, for and in consideration of Employee’s access to and receipt of TXU’s Confidential Information and the opportunity to participate in the Project and the mutual covenants of this Agreement, the
receipt and adequacy of which are acknowledged, TXU and Employee agree as follows: 
 1. Definitions. For purposes of this Agreement,
the following words shall have the following meanings: 
 (a) “Affiliate” shall mean any entity that, directly or
indirectly, controls, is controlled by or is under common control with TXU. 
 (b) “Confidential Information” means
information (i) disclosed to or known by the Employee as a consequence or through his/her work in connection with the Project; (ii) not generally known outside TXU; and (iii) which relates to any aspect of TXU’s business and
development in connection with the Project. Confidential Information includes all confidential and/or propriety information and/or trade secrets of TXU that has been and/or will be developed or used for the Project, including, but not limited to,
information regarding suppliers, consultants, customers, 
  

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 employees, contractors and the electric generation industry not generally known to the public; strategies, methods,
books, records and documents; technical information concerning products, equipment, services and processes; procurement procedures, pricing and pricing techniques; information concerning past, current and prospective customers, investors and
business affiliates (such as contact name, service provided, pricing, type and amount of services used, financial data and/or other such information); pricing strategies and price curves; positions; plans or strategies for expansion or acquisitions;
budgets; research; financial and sales data (including budgets, forecasts and historical financial data); trading methodologies and terms; communications information; evaluations, opinions and interpretations of information and data; marketing and
merchandising techniques; electronic databases; models; specifications; computer programs; contracts; bids or proposals; technologies and methods; training methods and processes; organizational structure; personnel information; payments or rates
paid to consultants or other service providers; and other such confidential or proprietary information. Confidential Information also includes matters that Employee conceives or develops, as well as matters Employee learns from other employees of
TXU. 
 (c) “Work Product” means all ideas, discoveries, programs, systems, methods, interfaces, protocols,
databases, creations, artwork, articles, programming, processes, designs, inventions or improvements relating to technological matters, whether or not capable of being protected by patent, copyright, trade secret or other intellectual property
right. 
 2. Non-Disclosure, Return of Property and Ownership of Work Product. 
 (a) Employee agrees not to divulge, use, furnish, disclose or make accessible, directly or indirectly, for his/her own benefit or the benefit of any other
person or entity, any Confidential Information for any reason or purpose whatsoever, except to the extent that disclosure or use of such Confidential Information is necessary to fulfill his/her responsibilities as an employee of TXU in connection
with the Project. Employee’s obligations under this Section 2 with respect to any specific Confidential Information shall cease only when that specific portion of the Confidential Information becomes publicly known, other than as a result
of disclosure by Employee, in its entirety and without combining portions of such information obtained separately. This Section 2 shall continue in full force and effect after termination of Employee’s employment for any reason.

 (b) All memoranda, notes, lists, records, drawings, specifications and related documents and other documents or papers (and all copies
thereof) relating to or containing Confidential Information, including such items stored in electronic form or by any other means, made or compiled by or on behalf of Employee, or made available to Employee, shall be property of TXU. Employee shall
deliver such items to TXU promptly upon the termination of Employee’s employment with TXU or at any other time upon TXU’s request and Employee shall not retain any electronic copies of any Confidential Information. 
 (c) Employee acknowledges and agrees that all Work Product conceived by the Employee while employed by TXU, whether or not during regular working hours,
provided such Work Product is related in some manner to the business of TXU, shall be owned and belong exclusively to TXU and that Employee shall have no personal interest in or right to use such Work Product. Employee shall, unless TXU otherwise
agrees in writing, and without additional compensation: (i) disclose promptly to TXU any and all Work Product, and business opportunities related to the present and/or contemplated business of TXU (“Business
Opportunities”); (ii) assign to TXU and comply with all 
  

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 reasonable instructions of TXU regarding assigning, upon request, the entire rights to all such Work Product and Business
Opportunities; (iii) give an affidavit and live testimony (as may be necessary or desirable in the sole and absolute discretion of TXU) in support of his/her inventorship or creation in any appropriate case; and (iv) whenever requested to
do so by TXU, execute any and all applications, assignments or other instruments that TXU shall deem necessary to obtain, maintain, protect or vest in TXU the entire right, title and interest in and to such Work Product and Business Opportunities.
This provision shall not apply to Work Product for which no equipment, supplies, facility or Confidential Information of TXU was used and which was developed entirely on Employee’s own time and (i) does not relate to (a) the business
of TXU; or (b) TXU’s actual or demonstrably anticipated business or development, or (ii) does not result from any work performed by Employee for TXU. 
 3. Non-Solicitation and Non-Competition. 
 (a) In order to protect the Confidential Information and in
order to enforce Employee’s agreement not to disclose Confidential Information, Employee and TXU agree that: 
 (i) during
Employee’s employment with TXU, and for the shorter of three (3) years after the termination of such employment or the period for which Employee received severance pay under the TXU Severance Plan in effect at the time of termination but
in no event less than six (6) months, Employee shall not directly or indirectly, either for his/her own benefit or the benefit of any other person or entity, contribute Employee’s knowledge to or work with, in any capacity that would or is
likely to involve use or disclosure of Confidential Information, any venture, business, association, trust or other organization which in any way competes with TXU in connection with the development, construction or operation of electric power
generation plants or related facilities, including air quality control systems, in plants fueled by a solid fossil fuel including petroleum coke, lignite and coal in Texas, PJM Power Pool or any other system control area in the United States in
which there is competition among generators of electric power and energy. 
 (ii) during the term of Employee’s employment with TXU, and
for three (3) years after the termination of such employment, Employee shall not 
 (A) directly or indirectly request or advise any
present or future TXU customers to cancel any contracts, or otherwise curtail their dealings, with TXU; 
 (B) directly or indirectly
request or advise any present or future TXU service provider or financial resource to withdraw, curtail, or cancel the furnishing of such service or resource to TXU; and 
 (C) directly or indirectly induce or attempt to influence any employee of TXU to terminate his or her employment; interfere with the relationship between TXU and its employees; or, employ or otherwise engage as an
employee, independent contractor or otherwise any employee of TXU. 
 Notwithstanding anything to the contrary contained in this Section 3(a), Employee
may own, directly or indirectly, securities of any entity traded on any national securities exchange or listed on the National Association of Securities Dealers Automated Quotation System if Employee does not, directly or indirectly, individually
own 1% or more of any class of equity securities, or securities convertible into or exercisable or exchangeable for 1% or more of any class of equity securities, of such entity. 
  

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 (b) In the event of a breach by Employee of any covenant set forth in this Section 3, the term of
such covenant shall be extended by the period of duration of such breach. 
 (c) Until the termination of the period during which
Employee’s activities are limited by this Agreement, Employee will, within ten (10) days after accepting any employment, consulting engagement, engagement as an independent contractor, partnership or other association, advise TXU of the
identity of the new employee, client, partner or other person with whom Employee has become associated. TXU may serve notice upon each such person that Employee is bound by this Agreement and furnish each such person with a copy of this Agreement.

 (d) Employee and TXU agree that the non-competition provisions set forth in this Section 3 are ancillary to this Agreement, which is
an enforceable agreement. Employee agrees that any association by Employee with a competitor of TXU during the Applicable Period may lead to Employee’s unauthorized use of the Confidential Information, even if such use was unintentional.
Because it would be impossible, as a practical matter, to monitor, restrain or police Employee’s use of such Confidential Information other than through Employee’s covenants contained in this Section 3, Employee acknowledges that such
restrictions are the narrowest method to protect TXU’s interests, and the narrowest method of enforcing consideration for his/her receipt of Confidential Information. 
 4. Notices. Any notices shall be in writing and shall be deemed given (a) when personally delivered, (b) when confirmed if delivered by
facsimile or similar device, or (c) when sent by certified mail, return receipt requested, addressed to the other party at the address provided below its/his/her signature to this Agreement, or at such other address as may be specified through
these notice procedures. 
 5. Assignment; Parties Bound. TXU reserves the right to assign all of its rights, powers and privileges
under this Agreement, including, without limitation, the right to enforce all of the terms of this Agreement, to successors or between Affiliates of TXU or any person who acquires a majority of the outstanding stock or all or substantially all of
the assets of TXU. Employee shall not assign or otherwise delegate his obligations or duties under this Agreement to any other person. Any assignment or delegation in violation of this Agreement shall be null and void. Subject to the foregoing, this
Agreement shall be binding upon the parties hereto and shall inure to the benefit of the parties hereto and their respective heirs, executors, administrators, legal representatives, successors, and permitted assigns. 
 6. Governing Law. THIS AGREEMENT IS GOVERNED BY AND SHALL BE CONSTRUED IN ACCORDANCE WITH LAWS OF THE STATE OF TEXAS. 
 7. Non-Waiver of Breach. A waiver of a breach or default by another must be in writing and shall not be deemed a waiver of a default by a third
party or any subsequent default or breach of the same or any other provision of this Agreement. 
 8. Severability; Reformation. If
any provision of this Agreement, as applied to any party or to any circumstances, is held to be invalid or unenforceable, such holding will not affect any 
  

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 other provision of this Agreement, the application of such provision to any other party or in any other circumstances or
the validity or enforceability of this Agreement. If any such provision (including the limitations contained in Section 3 as to time, geographical area, and scope of activity to be restrained) is so held to be unenforceable, the parties agree
that the court or authority making such determination shall reform this Agreement (including by reducing the limitations contained in Section 3 as to time, geographical area and scope of activity to be restrained to the extent necessary to
cause such limitations to be reasonable and not otherwise impose a restraint that is greater than necessary to protect the goodwill and Confidential Information of TXU) so as to make such provision enforceable as reformed. In the event that an
applicable court or authority would not have the legal authority to take the actions described in the preceding sentence, the parties agree to negotiate in good faith to agree on a modified provision that would, in so far as possible, reflect the
original intent of this Agreement without violating applicable law. 
 9. Remedies. The Employee recognizes and acknowledges the
competitive and confidential nature of the Confidential Information and that irreparable damage will result to TXU if it is disclosed to any third party or is used for any purpose, other than as permitted by this Agreement. TXU and Employee further
agree that money damages would not be a sufficient remedy for any breach of this Agreement by Employee and that such damages would be difficult if not impossible to quantify. Accordingly, Employee agrees that TXU shall be entitled to an injunction
or injunctions without the posting of any bond to prevent breaches or threatened breaches of this Agreement and/or to specific performance of this Agreement. Such remedies shall not be deemed to be the exclusive remedies for a breach by Employee of
this Agreement but shall be in addition to all other remedies available at law or equity to TXU. 
 10. No Right to Employment.
Nothing in this Agreement shall be construed as giving Employee any right of employment or continued employment with TXU. 
 11. Employee
Acknowledgement. Employee acknowledges that (i) TXU is engaged in the business of owning, managing and operating certain solid fuel and gas electric generation assets, (ii) TXU’s business is highly competitive, (iii) Employee
will be given access to Confidential Information of TXU that is a valuable, special, proprietary and unique asset used by TXU in its respective businesses, (iv) he/she will confirm, by separate acknowledgement, receipt of Confidential
Information in conjunction with the Project and (v) protection of such Confidential Information against unauthorized disclosure and use is of critical importance to TXU. 
 [Remainder of page intentionally left blank] 
  

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 IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and year first written above.

  

			
	TXU CORP.
		
	 By:
	 	  

	 Name:
	 	  

	 Title:
	 	  

		
	 Address:
	 	 1601 Bryan

		 	 Dallas, Texas 75201

		 	 Attention: General Counsel

		 	 Facsimile: (214) 812-6032

		
	 By:
	 	  

		 	 [Employee]

		
	 Address:
	 	  

		 	  

		 	  

		
	 Date:
	 	  

  

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