Document:

Exhibit

Exhibit 10.51

January 12, 2017

Mr. Surendra Babu Mandava

Dear Babu,

On behalf of Cadence Design Systems, Inc. (“Cadence”), I am pleased to offer you the position of Senior Vice President and General Manager, IP Group, reporting to me.  Your compensation will include an annualized base salary of $375,000, and you will be paid bi-weekly.  You will have a variable incentive opportunity, targeted at 75% of your annualized base salary, payable in accordance with the terms of Cadence’s Senior Executive Bonus Plan (including any successor plan thereof).  You will also be issued an option to purchase 85,000 shares of Cadence common stock (the “Stock Option”) and an Incentive Stock Award of 85,000 shares of Cadence common stock (the “Stock Award”).  In addition, you will be issued a Long-Term Performance-Based Incentive Stock Award of 125,000 shares of common stock (the “LTP Award”).  

Please note that the terms of this offer are subject to the attached Employment Terms.  

Cadence offers a comprehensive slate of employee benefits including, but is not limited to, the following: 
		
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	401(k) plan with employer matching contribution

		
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	Non-Qualified Deferred Compensation Plan 

		
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	Employee Stock Purchase Plan

		
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	Wide variety of medical, dental and vision plans

		
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	Life, disability, business travel accident and long-term care insurance

		
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	Healthcare and Dependent Care Flexible Spending Account reimbursement plans

		
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	Voluntary group legal, home, auto and pet insurance plans

Additional details on all of these benefits can be found in your Benefits Year-Round User Guide and will be discussed in depth at your new employee orientation.

Please understand that Cadence is an at-will employer, as described in the attached Employment Terms, and that this offer is contingent upon satisfactory completion of the Cadence background verification process and execution of Cadence’s Employee Proprietary Information and Inventions Agreement.

Offers of employment remain open for limited periods of time. Unless otherwise notified, this offer will expire on Monday, January 16, 2017.

Babu, we look forward to having you on our team! 

Sincerely,

/s/ Lip-Bu Tan

Lip-Bu Tan
President & Chief Executive Officer
Cadence Design Systems, Inc.

Cadence Design Systems, Inc.     2655 Seely Avenue    San Jose, CA 95134
Phone: 408-943-1234  World Wide Web: www.cadence.com

Employment Terms

Incentive Plan  

Your variable incentive opportunity under Cadence's Senior Executive Bonus Plan (“SEBP”) is targeted at 75% of your annualized base salary.  Actual payout amounts are determined based on both company and individual performance.

Equity Awards 

Your equity awards are summarized below for convenience and are subject to continued service. The definitive terms for your equity awards will be set forth in the grant documents.

Stock Option 

Your Stock Option will vest over four (4) years.  The first 25% of the grant will vest on the first anniversary of your grant date, and the balance will vest monthly over the remaining thirty-six (36) months.  Your proposed grant must be approved by the Compensation Committee of the Board of Directors.  The exercise price for your Option will be the closing price of Cadence Common Stock on the NASDAQ on the date of grant.  Additional information detailing your Stock Option will be sent to you within eight to twelve (8-12) weeks after your start date.

Stock Award 

Your Stock Award will vest over four (4) years.  The first 25% of the grant will vest on the first anniversary of your grant date, subject to achievement of a pre-determined corporate performance goal.  If the first 25% of the grant vests, the remaining 75% of your grant will vest ratably on the 2nd, 3rd and 4th anniversaries of your grant date.    Information detailing your Stock Award will be sent to you within eight to twelve (8-12) weeks after your start date.

Long-Term Performance-Based Incentive Stock Award

Vesting of your LTP Award will occur if the stock price increases to or above a threshold stock price of $28.00, and if the company exceeds a threshold level of relative total shareholder return (TSR).  Performance for vesting will be measured in March 2021, with the ability for accelerating vesting on a portion of the LTP Award based on performance measured on March 15, 2019 and March 15, 2020.  In addition, at each measurement date, the relative TSR of Cadence stock from February 8, 2016 to the applicable measurement date must be equal to or greater than the 35th percentile of companies listed in the S&P MidCap 400 Information Technology Index as of February 8, 2016 for any shares to vest on the respective measurement date.  Any shares which do not vest for this reason on the first two measure dates are not lost, but are carried forward and may vest on the next measurement date.

Further details of the LTP Award grant will be sent to you within eight to twelve (8-12) weeks after your start date.

Non-Qualified Deferred Compensation Plan 

You are eligible to participate in the Cadence Non-Qualified Deferred Compensation Plan (“NQDC”).  You may defer up to 80% of your eligible base compensation and 100% of your eligible bonus compensation without the annual IRS limitations imposed on tax-qualified retirement plans, such as the 401(k) Plan.  By deferring income into the NQDC plan, you may reduce your taxable wage base.  

Cadence Design Systems, Inc.     2655 Seely Avenue    San Jose, CA 95134    2
Phone: 408-943-1234  World Wide Web: www.cadence.com

Taxes on both the deferred income and earnings on investments are not assessed until you begin to receive distributions.  You may enroll in the plan within thirty (30) days of your hire date.  Participants will automatically receive enrollment and detailed plan information within the thirty (30) day period.  If you choose not to participate, you will have an annual opportunity to participate beginning each January 1.

Vacation

As an executive, you will not accrue vacation, but may take personal time off at your discretion, subject to Lip-Bu’s approval.

At-Will Employment
Cadence is an at-will employer.  You are not being promised any particular period of employment.  The employment relationship may be terminated by either you or Cadence at any time, with or without cause and with or without notice, for any reason whatsoever.  No one at Cadence is empowered, unless specifically authorized in writing by the executive overseeing Human Resources, to make any promise, express or implied, that employment is for any minimum or fixed period or that cause is required for the termination of the employment relationship.

Confidentiality and Non-Disclosure Obligations

Cadence has a policy of non-disclosure to anyone in our Company of any confidential or proprietary information belonging to your current employer.  This policy of non-disclosure also applies to confidential or proprietary information belonging to your previous employers, or any other person or entity with whom you have a non-disclosure agreement.  Accordingly, please do not use or disclose to Cadence any confidential or proprietary information belonging to your employer or any other person or company with which you have signed such a non-disclosure agreement.

Cadence also requires that its employees protect its confidential and proprietary information from disclosure to any unauthorized persons or entities.  Therefore, it is a condition of your employment with Cadence that you execute Cadence's Employee Proprietary Information and Inventions Agreement.

Cadence’s Code of Business Conduct and Outside Employment Activities

All Cadence employees are expected to devote their primary efforts to performing the job that Cadence hired them to perform.  All employees must comply with Cadence’s Code of Business Conduct, which requires, among other things, that employees obtain a “Conflict of Interest Waiver” before engaging in any outside employment and certain other activities that may conflict or appear to conflict with Cadence’s interests.  As such, outside employment – including but not limited to self-employment, consulting, and serving as a board member or director for another company – is not permitted for full-time or part-time employees without prior approval as set forth in the Code of Business Conduct.

Employment Eligibility

In accordance with the Immigration Reform and Control Act of 1986, you will be required to provide Cadence with documentary evidence of your identity and eligibility for employment in the United States.  Such documentation must be provided within three (3) business days of your date of hire; otherwise our employment relationship with you may be terminated.  Cadence will provide immigration assistance to maintain and/or obtain work authorization where applicable.

Cadence Design Systems, Inc.     2655 Seely Avenue    San Jose, CA 95134    3
Phone: 408-943-1234  World Wide Web: www.cadence.com

If you do not have a Social Security Card, you are responsible for applying for a Social Security Card within fourteen (14) days of entering the United States.  If, within 30 days of your first day of employment with Cadence, Human Resources has not received your Social Security Card, your pay will be suspended until you provide us with a copy of your card. 

Depending on the position you have been offered, a function of your job with Cadence may require access to data that is restricted by export regulations. If the position you have been offered does require you to be able to access export-restricted data, then this offer of employment is also contingent on your ability to access the data in accordance with the regulations, which is based on your residency status.   If you are not a “U.S. Person” (citizen, green card holder or protected refugee), an export license may be required before access to the data is granted.

Please take your time reading through this entire packet. Should you have any questions regarding its content, do not hesitate to call or email me directly.  Kindly sign/complete and return the enclosed documents as instructed on the checklist.  Completed documents can be scanned and emailed.

****

This is to verify my acceptance of the above stated offer and employment terms:

	
					
	/s/ Surendra Babu Mandava
	 
	1/12/2017
	 
	1/13/2017

	Surendra Babu Mandava
	 
	Today’s Date
	 
	Desired Start Date

Cadence Design Systems, Inc.     2655 Seely Avenue    San Jose, CA 95134    4
Phone: 408-943-1234  World Wide Web: www.cadence.comEX-4.6

 Exhibit 4.6 

FORM OF 
 KEY STOCKHOLDER
AGREEMENT 
 OF KEYSTONE SOLUTIONS, INC. 

THIS KEY STOCKHOLDER AGREEMENT (this “Agreement”) is entered into as of February 8, 2017, by and among KEYSTONE
SOLUTIONS, INC., a Delaware corporation (the “Company”), and [                    ] (the “Key Stockholder”).

 Recitals 
 A.
The Company, Novume Solutions, Inc., a Delaware corporation (“Novume”), Brekford Corp., a Delaware corporation (“Brekford”), KeyStone Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Novume
(“KeyStone Merger Sub”), and Brekford Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Novume (“Brekford Merger Sub”), are parties to a certain Agreement and Plan of Merger (the
“Merger Agreement”) of even date herewith, pursuant to which the Company will be merged with and into KeyStone Merger Sub, with KeyStone Merger Sub as the surviving corporation, and Brekford Merger Sub will be merged with and into
Brekford, with Brekford as the surviving corporation (the “Merger”). 
 B. As a condition to its willingness to enter into
the Merger Agreement, the Company has required that the Key Stockholder agree to vote all of the shares of common stock of the Company, par value $0.0001 per share (the “Company Common Stock”), owned of record or beneficially by the
Key Stockholder, together with any additional shares of Company Common Stock hereafter acquired by the Key Stockholder or with respect to which the Key Stockholder hereafter acquires beneficial ownership (whether by exercise or conversion of
preferred stock, options, warrants, debentures or other securities or otherwise) (collectively, the “Shares”) in favor of approval of the Merger Agreement and any actions required in furtherance thereof. 

NOW, THEREFORE, in consideration of the premises, the covenants and agreements set forth herein, and other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
 1. Definitions. For purposes of
this Agreement, unless otherwise defined herein, capitalized terms shall have the meaning set forth in the Merger Agreement. 
 2. Voting
Shares. The Key Stockholder hereby agrees that at any meeting of stockholders of the Company, however called, and in any action by consent of stockholders of the Company in lieu of a meeting, the Key Stockholder will appear at the meeting (or
otherwise cause the Shares to be counted as present thereat for purposes of establishing a quorum) and the Key Stockholder will vote or consent to the voting of (or cause to be voted or consented) the Shares (a) in favor of the Merger,
(b) in favor of the Merger Agreement, as such may be modified or amended from time to time, (c) against any action that is intended to, or that could reasonably be expected to, impede, delay or materially adversely affect the transactions

 
contemplated by the Merger Agreement, and (d) against any other action or agreement that would result in a breach of any covenant, representation or warranty or any other obligation or
agreement of the Company under the Merger Agreement or that would result in any of the Company’s obligations under the Merger Agreement not being fulfilled. Notwithstanding anything to the contrary herein, the Key Stockholder shall not be
obligated to vote in favor of the Merger or the Merger Agreement in the event that any of the terms or conditions of the Merger Agreement are amended or modified in any respect that (i) has a material adverse effect on the rights or obligations
of the Key Stockholder or (ii) changes the amount of the Company Merger Consideration. Increases or decreases to the Company Merger Consideration that would occur by operation of Section 2.9 of the Merger Agreement are not
considered changes to the amount of the Company Merger Consideration for purposes of the foregoing sentence. 
 3. Representations and
Warranties of the Key Stockholder. The Key Stockholder represents and warrants to the Company as follows: 
 (a) Ownership of
Shares. As of the date hereof, the Key Stockholder is the sole beneficial owner of [                    ] Shares. Such Shares constitute
all the shares of the Company Common Stock owned beneficially or of record by the Key Stockholder and are held by the Key Stockholder, or by a nominee or custodian for the benefit of the Key Stockholder, free and clear of all liens, security
interests, pledges, agreements, claims, charges or encumbrances (“Encumbrances”), except for Encumbrances arising under this Agreement. Except for this Agreement, the Key Stockholder is not a party to any voting trust, proxy or
other agreement or understanding with respect to the voting of any capital stock of the Company. 
 (b) Power; Binding Agreement. The
Key Stockholder has all requisite power and authority and the legal capacity to enter into this Agreement and to perform all of the Key Stockholder’s obligations under this Agreement. The execution and delivery by the Key Stockholder of this
Agreement and the performance by the Key Stockholder of his/her obligations hereunder have been duly authorized by all necessary action on the part of the Key Stockholder, and no other action on the part of the Key Stockholder is necessary to
authorize his execution and delivery by the Key Stockholder or the performance by the Key Stockholder. This Agreement has been duly and validly executed and delivered by the Key Stockholder and constitutes a valid and binding obligation of the Key
Stockholder, enforceable against the Key Stockholder in accordance with its terms. If the Key Stockholder is married and the Key Stockholder’s Shares constitute community property (or such spouse otherwise has an interest in the Shares), this
Agreement has been duly authorized, executed and delivered by, and constitutes a valid and binding obligation of, the Key Stockholder’s spouse, enforceable against that spouse, in accordance with its terms. 

(c) Consents and Approvals; No Violation. The execution and delivery of this Agreement by the Key Stockholder, the performance by the
Key Stockholder of his obligations hereunder and the consummation by the Key Stockholder of the transactions contemplated by this Agreement does not and will not: (i) require any consent, waiver, approval, authorization, filing, order or permit
of, or declaration, filing or registration with, or notification to, any domestic or foreign governmental or regulatory authority or third party; (ii) result in a breach of, or constitute a default (or event which with the giving of notice or
lapse of time, or 

  
 2 

 
both, would become a default) under, or give rise to any rights of termination, amendment, modification, acceleration or cancellation of or loss of any benefit under, or result in the creation of
any Encumbrance on any of the assets or properties of the Key Stockholder pursuant to, any Contract to which he is a party, or by which any of his assets or properties is bound or affected; or (iii) conflict with or result in a violation of any
governmental order or law applicable to the Key Stockholder or his assets or properties. 
 4. Additional Covenants of the Key
Stockholder. The Key Stockholder hereby covenants and agrees that: 
 (a) The Key Stockholder will not enter into any transaction, take
any action, or by inaction permit any event to occur that would (i) result in any of the representations or warranties of the Key Stockholder herein contained not being true and correct at and as of the time immediately after the occurrence of
such transaction, action or event; or (ii) have the effect of preventing, limiting or disabling the Key Stockholder from performing the Key Stockholder’s obligations under this Agreement. 

(b) The Key Stockholder will not grant any proxies or powers of attorney with respect to any Shares, deposit any Shares into a voting trust or
enter into a voting agreement with respect to such Shares or otherwise confer upon any person any right or authority with respect to voting in respect of such Shares or otherwise confer upon any person any right or authority with respect to voting
in respect of such Shares; provided, however, the Key Stockholder may grant proxies to third parties provided that such proxies are expressly made subject to, and are fully consistent with, the terms of this Agreement. 

(c) From and after the date hereof until the termination of this Agreement, other than pursuant to the Merger Agreement, the Key Stockholder
will not sell, transfer, pledge, hypothecate, transfer by gift, or otherwise dispose of in any manner whatsoever, any of the Shares without notifying the Company in advance and obtaining and delivering to the Company any evidence that the Company
may reasonably request to evidence the transferee’s agreement to be bound by this Agreement. Any transfer or other disposition in violation of the terms of this Section 4(c) shall be null and void. If any involuntary transfer or
other disposition of any of the Shares shall occur (including, but not limited to, a sale by the Key Stockholder’s trustee in bankruptcy, a sale to a purchaser at any creditor’s or court sale or transfer upon death), the transferee (which
term, as used herein, shall include any and all subsequent transferees of the initial transferee) shall take and hold such Shares subject to all of the restrictions, liabilities an rights under this Agreement, which shall continue in full force and
effect. 
 (d) The Key Stockholder agrees not to assert any dissenters’, appraisal or similar rights, if any, whether under Delaware
Law or otherwise with respect to the Merger. 
 (e) The Key Stockholder will execute and deliver any additional documents reasonably
necessary or desirable, in the opinion of the Company’s counsel, to implement and effect the provisions of this Agreement. 
 5.
Adjustments to Prevent Dilution, Etc. In the event of any change in the Company Common Stock by reason of any reclassification, recapitalization, reorganization, split-up, 

  
 3 

 
combination, exchange of shares or readjustment, or a stock dividend or other extraordinary distribution thereon, the term “Shares” shall be deemed to refer to and include the
Shares as well as all such stock dividends and distributions and any shares into which or for which any or all of the Shares may be changed or exchanged. 

6. Consent to Obligations and Provisions under Merger Agreement. The Key Stockholder acknowledges that he has received and reviewed a
copy of the Merger Agreement. The Key Stockholder understands that if the Merger is consummated under the Merger Agreement he will be personally subject to obligations and provisions under the Merger Agreement. The Key Stockholder hereby expressly
consents to and agrees to be bound by the terms set forth in the Merger Agreement including (but not limited to) Section 2.9 of the Merger Agreement which sets forth the procedures by which the Company Merger Consideration may be
adjusted. 
 7. Termination of Agreement if Merger does not Occur. This Agreement shall terminate and cease to have any further force
or effect immediately upon (i) the termination of the Merger Agreement pursuant to Section 9.1 thereof or (ii) on June 1, 2017 in the event that the Merger has not been consummated on or before such date. 

8. Miscellaneous. 
 (a)
No Waiver. The failure of any party to exercise any right, power or remedy under this Agreement or otherwise available in respect of this Agreement at law or in equity, or to insist upon compliance by any other party with that party’s
obligations under this Agreement, shall not constitute a waiver of any right to exercise any such or other right, power or remedy or to demand such compliance. 

(b) Descriptive Headings; Interpretation. The headings contained in this Agreement are for convenience of reference only and shall not
affect in any way the meaning or interpretation of this Agreement. References in this Agreement to Sections and Exhibits mean a Section or Exhibit of this Agreement unless otherwise indicated. The terms “beneficially own” and
“beneficial owner” with respect to any securities shall have the same meaning as in, and shall be determined in accordance with, Rule 13d-3 under the Securities Exchange Act of 1934, as
amended. 
 (c) Entire Agreement; Assignment. This Agreement (including the exhibits and other documents and instruments referred to
herein), together with the Merger Agreement shall constitute the entire agreement of the parties with respect to the subject matter hereof and shall supersede all prior oral or written agreements in regard thereto. Except as otherwise expressly
provided herein, this Agreement is not intended to confer upon any person not a party hereto any rights or remedies hereunder. Except as otherwise expressly provided herein, this Agreement shall not be assigned by operation of law or otherwise. 

  
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 (d) Injunctive Relief, Remedies Cumulative. 

(i) The Key Stockholder acknowledges that the Company will be irreparably harmed and that there will be no adequate remedy at law for a
violation of any of the covenants or agreements of the Key Stockholder that are contained in this Agreement. It is accordingly agreed that, in addition to any other remedies that may be available to the Company upon the breach by the Key Stockholder
of such covenants and agreements, the Company shall have the right to obtain injunctive relief to restrain any breach or threatened breach of such covenants or agreements or otherwise to obtain specific performance of any of such covenants or
agreements. 
 (ii) No remedy conferred upon or reserved to any party herein is intended to be exclusive of any other remedy and every
remedy shall be cumulative and in addition to every other remedy herein or now or hereafter existing at law, in equity or by statute. 
 (e)
Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware applicable to agreements made and to be performed entirely within such state, without regard to the conflicts of laws
principles that would require the application of any other law. 
 (f) Effect of Partial Invalidity. Whenever possible, each
provision of this Agreement shall be construed in such a manner as to be effective and valid under applicable law. If any provision of this Agreement or the application thereof to any party or circumstance shall be prohibited by or invalid under
applicable law, such provisions shall be ineffective to the extent of such prohibition without invalidating the remainder of such provision or any other provisions of this Agreement or the application of such provision to the other party or other
circumstances. 
 (g) Counterparts. This Agreement may be executed and delivered by each of the parties hereto by facsimile machine
and in two or more counterparts, each of which counterpart, when so executed and delivered, shall be deemed to be an original but all such counterparts shall together constitute one and the same agreement. 

[SIGNATURE PAGE FOLLOWS ON NEXT PAGE] 

  
 5 

 IN WITNESS WHEREOF, this Agreement has been executed by the parties as of the date first above
written. 
  

			
	KEYSTONE SOLUTIONS, INC.
		
	By:	 	 
	Name:	 	Robert A. Berman
	Title:	 	Chief Executive Officer
	
	KEY STOCKHOLDER
		
		 	
	Name:	 	 

 The undersigned spouse of the Key Stockholder hereby consents to, and agrees to be bound by, the foregoing Key
Stockholder 
 Agreement. 
  

	
	
	   

	Spouse of Key Stockholder

			
		
	Name:	 	  

	Date:	 	  

 [Signature page to Key Stockholder Agreement – KeyStone Solutions]

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