Document:

2006 Retention Bonus Agreement

 Exhibit 10.1 
 This agreement is entered into by and between Avici Systems Inc. (the “Company”) and TS Ramesh (“you”). 
 RETENTION BONUS 
 You will receive a retention bonus if (1) you remain actively employed full-time with the
Company for the one-year period immediately following the Effective Date (the “Retention Period”); (2) prior to a Change of Control that occurs before the end of the Retention Period, your employment is terminated without Cause; or
(3) at the time of or following a Change of Control that occurs before the end of the Retention Period, your employment is terminated without Cause or you resign for Good Reason. 
 The amount of the retention bonus will be six (6) months of your base salary at the highest rate in effect during the Retention Period, less applicable taxes. The retention bonus will be paid in a lump sum within
thirty (30) days following the end of the Retention Period or such earlier termination date. 
 STOCK OPTIONS

 Upon a Change of Control, at least fifty percent (50%) of the unvested portion of each of your stock option awards granted under the
Company’s 2000 Stock Option and Incentive Plan, as amended (the “Plan”), will immediately vest and become exercisable (by crediting you for such purpose with additional service time, such that options will continue to vest following a
Change of Control at the pre-existing number of shares per installment, but over one-half of the pre-existing remaining vesting period). The remaining unvested portion of your options will continue to vest in accordance with the terms of the
applicable agreement and the Plan following the Change of Control. 
 For example, if you have been awarded 120 options under the Plan that vest over four
years at the rate of 2.5 options per month, after three years 90 of your options will have vested and 30 will be unvested. Upon a Change of Control occurring at the end of year three, at least 15 of your 30 unvested options will immediately vest and
become exercisable. Your remaining unvested options will continue to vest at the rate of 2.5 per month. This will have the effect of reducing your remaining vesting period from one year to six months. 
 If at the time of or following a Change of Control you are terminated without Cause or you resign for Good Reason, all of your unvested options under the Plan (including
for clarity any options issued by an acquiror of the Company on assumption of or substitution for your Company options) will immediately vest and become exercisable. 
 The above terms do not apply to any restricted stock grants, which continue to be governed by the applicable agreement(s) and plan. 
 DEFINITIONS; OTHER 
 A termination
for “Cause” as used herein means you are terminated due to (a) willful misconduct or violation of Company policy which causes material harm to the Company, (b) willful breach of an employment or other agreement with the
Company which causes material harm to the Company, or (c) being convicted of any felony. 
 A resignation for “Good Reason” as used
herein means you resign because, following or at the time of a Change of Control, (a) you suffer a material reduction in responsibility; (b) your base salary is decreased; (c) you are required to relocate more than fifty
(50) miles from your work location immediately prior to the Change of Control; or (d) you are excluded from any material benefit plan made available to similarly situated employees of the acquiring party. 
 “Change of Control” as used herein means the closing of (a) the sale of the Company by merger, consolidation or purchase of outstanding capital
stock in which the shareholders of the Company, as such, no longer own a majority of the outstanding equity securities of the Company or its successor; (b) any sale of all or substantially all of the assets of the Company, other than in a
spin-off or similar transaction; or (c) any other acquisition of the business of the Company, as determined by the Board. 

 Assignment. This agreement will be binding on and inure to the benefit of the parties and the Company’s
successors and assigns. 
 Confidentiality. You must keep this agreement confidential. The Company may publicly disclose the fact that you have been
offered this agreement, the terms of this agreement, and/or your receipt of a retention bonus under this agreement (the “Information”). If, prior to the Company’s public disclosure of any or all of the Information, either you disclose
any or all of the Information to anyone other than your spouse or financial advisor or your spouse or financial advisor discloses any or all of the Information, this agreement will become void and you agree to repay any payments already paid
hereunder. 
 Employment at Will. This agreement is not an employment contract. Nothing in this agreement modifies your status as an employee at will
or guarantees employment for any length of time. 
 Entire Agreement; Modification; Governing Law. Except as otherwise provided herein, this agreement
constitutes the only agreement between you and the Company with respect to the subject matter hereof, superseding in all respects any and all prior oral or written agreements or understandings pertaining to the subject matter hereof. This agreement
may be amended or modified only in a writing signed by both you and the Company. Any dispute concerning this agreement will be governed by the internal laws of Massachusetts. 
  

									
	AVICI SYSTEMS INC., 	 		 	By: EMPLOYEE
					
	Print name:	 		 		 	Print name:	 	
	Signature:	 	 /s/ William Leighton
	 		 	Signature:	 	 /s/ T.S. Ramesh2006 Severance Pay Agreement

 Exhibit 10.2 
 This agreement is entered into by and between Avici Systems Inc. (the “Company”) and T.S. Ramesh (“you”). 
 SEVERANCE PAY 
 You will receive severance pay if you are terminated from employment with the Company without Cause or
if you resign for Good Reason. 
 The amount of the severance pay will be three (3) months of your base salary at the rate in effect on your separation
date, less applicable taxes. In addition, if you extend your group health, dental, and/or vision insurance coverage under COBRA, for the first three (3) months the Company will pay the same percentage of your monthly premiums that it pays for
active employees. For the remainder of the COBRA period you will be solely responsible for the full premium amounts. 
 To receive severance pay, you will be
required to sign the Company’s standard release of claims. 
 The Company may arrange under separate agreement for other benefits in connection with any
future workforce reductions. 
 Severance pay eligibility will end and not apply to any termination or resignation occurring following the one (1) year
anniversary of a Change of Control. 
 DEFINITIONS; OTHER 
 A termination for “Cause” as used herein means your being terminated due to (a) willful misconduct or violation of Company policy which causes
material harm to the Company, (b) willful breach of an employment or other agreement with the Company which causes material harm to the Company, or (c) being convicted of any felony. 
 A resignation for “Good Reason” as used herein means you resign because, following or at the time of a Change of Control, (a) you suffer a material
reduction in responsibility; (b) your base salary is decreased; (c) you are required to relocate more than fifty (50) miles from your work location immediately prior to the Change of Control; or (d) you are excluded from any
material benefit plan made available to similarly situated employees of the acquiring party. 
 “Change of Control” as used herein means the
closing of (a) the sale of the Company by merger, consolidation or purchase of outstanding capital stock in which the shareholders of the Company, as such, no longer own a majority of the outstanding equity securities of the Company or its
successor; (b) any sale of all or substantially all of the assets of the Company, other than in a spin-off or similar transaction; or (c) any other acquisition of the business of the Company, as determined by the Board. 
 Assignment. This agreement will be binding on and inure to the benefit of the parties and the Company’s successors and assigns. 
 Confidentiality. You must keep this agreement confidential. The Company may publicly disclose the fact that you have been offered this agreement, the terms of
this agreement, and/or your receipt of severance pay under this agreement (the “Information”). If, prior to the Company’s public disclosure of any or all of the Information, either you disclose any or all of the Information to anyone
other than your spouse or financial advisor or your spouse or financial advisor discloses any or all of the Information, this agreement will become void and you agree to repay any payments already paid hereunder. 
 Employment at Will. This agreement is not an employment contract. Nothing in this agreement modifies your status as an employee at will or guarantees employment
for any length of time. 

 Entire Agreement; Modification; Governing Law. Except as otherwise provided herein, this agreement constitutes the
only agreement between you and the Company with respect to the subject matter hereof, superseding in all respects any and all prior oral or written agreements or understandings pertaining to the subject matter hereof. This agreement may be amended
or modified only in a writing signed by both you and the Company. Any dispute concerning this agreement will be governed by the internal laws of Massachusetts. 
  

									
	AVICI SYSTEMS INC., 	 		 	By: EMPLOYEE
					
	Print name:	 		 		 	Print name:	 	
	Signature:	 	 /s/ William Leighton
	 		 	Signature:	 	 /s/ T.S. RameshAmendment to employment offer letter

 Exhibit 10.48 
 VICAL INCORPORATED 
 10390 Pacific Center Court 
 San Diego, CA 92121-4340 
 May 19,
2006 
 Jill M. Church 
 Vical Incorporated 
 10390 Pacific Center Court 
 San Diego, CA 92121-4340 
  

	Re:	Amendment to Agreement Regarding Employment Terms 

 Dear Jill:

 This Amendment (the “Amendment”) to your Letter Agreement with Vical Incorporated (the “Company”) dated
September 20, 2004 (the “Agreement”) amends the terms and conditions of the Agreement to the extent provided herein. Except as specifically amended by this Amendment, the terms and conditions of the Agreement shall
remain in full force and effect. 
 The attachment to the Agreement titled “Salary Continuation” is hereby deleted in its entirety and replaced
with the following: 
 “Salary Continuation” 
 Subject to mitigation, Vical will continue to pay your base compensation, at the rate then in effect, for up to six months following the
termination of your employment if, prior to the expiration of your rights to salary continuation as provided below: 
  

	 	(i)	Vical terminates your employment without your consent for any reason other than Cause or Disability; or 

  

	 	(ii)	you voluntarily resign your employment for Good Reason 

 The salary continuation payments will cease in the event of your death. In order to receive your salary continuation, you will be required to sign a release in a form acceptable to Vical, of any and all claims that you may have against
Vical. The salary continuation rights described herein shall expire on the fourth annual anniversary of the commencement of your employment; provided, however, that such rights shall automatically renew for successive 1 year periods unless
the Company provides written notice to you at least 90 days prior to the next scheduled expiration date that such rights will not be renewed. 
 Definitions: 
  

	 	1.	 Mitigation. The payments described in the section above titled “Salary Continuation” shall be reduced on a dollar-for-dollar basis by any other
compensation earned by you for personal services performed as an employee or 

	 	 
independent contractor during the six-month period following the termination of your employment, including (without limitation) deferred compensation. You
will apply your best efforts to seek and obtain other employment or consulting engagements, whether on a full- or part-time basis during such six-month period in order to mitigate the Company’s obligations. At reasonable intervals, you will
report to Vical with respect to such efforts and any compensation earned during such six-month period. 

  

	 	2.	Cause shall mean a failure to perform your duties, other than a failure resulting from complete or partial incapacity due to physical or mental illness or impairment, gross
misconduct or fraud or conviction of, or a plea of “guilty” or “no contest” to a felony. 

  

	 	3.	Disability shall mean that you, at the time your employment is terminated, have performed substantially none of your duties under this Agreement for a period of not less than
three consecutive months as the result of your incapacity due to physical or mental illness. 

  

	 	4.	Good Reason shall mean that you have incurred a material reduction in your authority or responsibility or a reduction in base salary of more than 25%.”

 This Amendment may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall
constitute one and the same instrument. This Amendment shall be governed by and construed in accordance with the laws of the State of California, without regard to conflicts of law principles. 
 Please sign this Amendment and return it to the Company at your earliest convenience. 
  

			
	Sincerely,
	
	VICAL INCORPORATED
		
	 By:
	 	 /s/ Vijay B. Samant

		 	 Vijay B. Samant

		 	 President and Chief Executive Officer

	
	ACCEPTED AND AGREED:
	
	 /s/ Jill M. Church

	 Jill M. Church

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