Document:

Amended Agreement

 EXHIBIT 10.15 
 AMENDMENT TO AGREEMENT 
 THIS AMENDMENT to that certain agreement entered into as of October
30 2006 (the “Wohlberg Agreement”) by and between Optical Molecular Imaging, Inc., now known as ImmunoCellular Therapeutics, Ltd. (“ICT”) and David Wohlberg (“Wohlberg”) (together, the “Parties”) is entered
into by the Parties with reference to the following facts: 
 A. ICT and Wohlberg previously entered into the Wohlberg Agreement, specifying
the terms and conditions under which Wohlberg would serve ICT as its President and Chief Operating Officer; and 
 B. ICT and Wohlberg wish
to amend certain provisions of the Wohlberg Agreement. 
 NOW, THEREFORE, the parties agree as follows: 
 1. Paragraph 1 Amendment. Paragraph 1 of the Wohlberg Agreement is hereby amended by replacing the last sentence of Paragraph 1 with the following
sentence: 
 “Wohlberg shall perform the Services on a part-time basis through May 31, 2007, and commencing on June 1, 2007, on a
full-time basis during the Company’s normal business hours.” 
 2. Paragraph 3.1 Amendment. Paragraph 3.1 of the Wohlberg
Agreement is hereby amended by replacing the second sentence of Paragraph 3.1 with the following sentence: 
 As payment in full for the
Services during the term of the Agreement, the Company shall grant to Wohlberg options to purchase 95,000 shares of the Company’s common stock (the “New Options”), which shall vest quarterly over the one-year term of this Agreement,
and a salary of $2,000 per month, which shall increase to $2,500 per month immediately upon the Company signing the definitive License Agreement with Cedars-Sinai Medical Center and which shall increase to $10,000 per month effective as of June 1,
2007. 
 3. Continuation of Wohlberg Agreement. Except as modified above, all of the provisions of the Wohlberg Agreement, including
the right of either of the Parties to terminate the Wohlberg Agreement without cause upon 30 days written notice, shall continue in full force and effect. 
 THIS AMENDMENT TO AGREEMENT, together with the Wohlberg Agreement as modified by this Amendment to Agreement, constitutes the entire agreement of ICT and Wohlberg pertaining to the subject matter of this Amendment to
Agreement and the Wohlberg Agreement. This Amendment to Agreement may be executed in one or more counterparts, each of which is an original and all of which together constitute one and the same instrument. 

 IN WITNESS WHEREOF, ICT and Wohlberg have executed this Amendment to Agreement as of June 28, 2007.

  

									
		 		 	IMMUNOCELLULAR THERAPEUTICS, LTD.
				
	/s/ David Wohlberg	 		 	By:	 	/s/ Sanford J. Hillsberg
	David Wohlberg	 		 		 	Sanford J. Hillsberg
		 		 		 	Secretary

  

 2Employment Offer Letter between the Registrant and Rodney A. McCowan

 EXHIBIT 10.24 
 October 4, 2006 
 Rodney A. McCowan 
 Dear Rodney: 
 On behalf of VeriSign, Inc. I am pleased to offer you a regular full-time position of Senior Vice
President, Human Resources reporting to Stratton Sclavos. The details of the offer are as follows: 
 Annual Salary:
$360,000.00 (Paid Bi-Weekly) 
 Hiring Bonus: $50,000.00 (grossed up for taxes) 
 Should you voluntarily terminate from VeriSign for any reason within one year of your hire date, you will be required to repay VeriSign $50,000.00
on a pro-rated basis. 
 Stock Options and Restricted Stock Units: I will recommend to the Board of Directors that you be granted stock
options to purchase 110,000 shares of Common Stock of VeriSign, Inc., such grant to be subject to terms and conditions of the VeriSign, Inc. 2006 Equity Incentive Plan. The exercise price of the options will be based on the fair market
value on the date of grant. You will be eligible to exercise up to twenty-five percent (25%) of your total shares one year from the date of grant, provided that you are employed by VeriSign, Inc. or one of its direct or indirect
subsidiaries at that time. Each subsequent quarter (3 months) an additional 6.25% of your total shares will become eligible to exercise provided that you are employed by VeriSign, Inc. or one of its direct or indirect subsidiaries at that
time. Additionally, I will recommend to the Board of Directors that you be granted 15,000 restricted stock units of VeriSign, Inc., such grant to be subject to the terms and conditions of the VeriSign, Inc. 2006 Equity Incentive
Plan. This award will fully vest over a period of four years from the date of the award with 25% vesting after on each annual anniversary of the grant date provided that you are employed by VeriSign, Inc. or one of its direct or indirect
subsidiaries at that time. We recommend that you consult with your tax advisor regarding tax treatment of restricted stock units and stock options. 
 Annual Bonus: You are eligible to participate in the 2006 VeriSign Bonus Plan. Your targeted bonus percentage for the 2006 Bonus plan is 60% of your base salary. Eligibility for payment under this plan is governed by
the terms and conditions of the VeriSign Bonus Plan Document. 
 Benefits: Your medical and insurance
benefits will be commensurate with those of other employees. The full package of benefits is attached. New employees receive 18 days of paid time off per year. VeriSign also observes 11 paid holidays per year. Please Note: Your benefits
information for 2005 will be mailed to your home shortly after your date of hire. 

 This offer is contingent upon your signing the Company’s Confidentiality Agreements included with this offer and
upon successful clearance of your background check. It is also contingent upon providing evidence of your legal right to work in the United States as required by the Immigration and Naturalization Service. This offer is for employment on an at will
basis, which means that this relationship can be terminated at any time by either party. 
 To accept this offer, please sign below and return the original
offer letter plus the additional enclosed documents in the return envelope and keep a copy of the offer letter for your records. This offer will expire on October 10, 2005. Please contact Andrea Peifer at
(650) 426-4663 if you have any questions.  
 Our New Hire Orientation Meetings are conducted every Monday at 487 East Middlefield Road in Mountain
View. The meeting time is approximately two hours and begins at 9:00 A.M. Please check with your recruiter to see when your New Hire Orientation will be conducted. When you arrive, please let the VeriSign receptionist know that you are there for
orientation. 
 Our goal is to continue to transform communication and commerce by driving simplicity, innovation, and confidence into all electronic
interactions worldwide. We are confident we will achieve this goal thanks to our committed group of industry partners throughout the world and most importantly to our employees—our most valued and respected asset. We hope you will
join our team and help to contribute to our goal! 
 Sincerely, 
  

											
	 /s/ Stratton D. Sclavos
	 		 	Accepted:	 	 /s/ Rodney A. McCowan
	 		 	Date: 10/10/06
	 Stratton Sclavos
	 		 		 		 		 	
	Chairman of the Board, President, and CEO	 		 	Start Date:	 	10/30/06Employment Offer Letter between the Registrant and John M. Donovan

 EXHIBIT 10.25 
 November 20, 2006 
 John Donovan 
 Dear John:

 On behalf of VeriSign, Inc. (“VeriSign”), I am pleased to confirm your regular full-time position of Executive Vice President, Worldwide Sales
and Services reporting to Stratton Sclavos. This offer of employment with VeriSign is contingent upon the closing of the acquisition (the “Acquisition”) of inCode Telecom Group, Inc. (the “Company”) by VeriSign pursuant to the
terms and conditions of that certain Agreement and Plan of Merger to be entered into by and among VeriSign, Diego Acquisition Corporation, the Company and John Donovan, as Representative (the “Merger Agreement”). 
 The details of your compensation package are as follows: 
 Annual Base Salary: $450,000 (Paid Bi-Weekly), minus applicable withholdings and deductions 
 Stock Options: I will
recommend to the VeriSign Board of Directors that you be granted Non Qualified Stock Option to purchase 200,000 shares of Common Stock. If granted, the price of shares will be based on the fair market value on the date of grant. You will be eligible
to exercise up to twenty-five percent (25%) of your total shares one year from the date of grant. Each subsequent quarter (3 months) an additional 6.25% of your total shares will become eligible to exercise while VeriSign employs you.

 Restricted Stock Units: I will recommend to the VeriSign Board of Directors that you be awarded 25,000 Restricted Stock Units (the
“Units”). If awarded, the Units will be 100% vested four years from the date of the award with 25% of the Units vesting on the yearly anniversary date of the award. 
 Annual Bonus: You are eligible to participate in the 2007 VeriSign Bonus Plan (the “Bonus Plan”). Your targeted bonus percentage for the
Bonus Plan is 60% of your annual base salary. Eligibility for payment under the Bonus Plan is governed by the terms and conditions thereof. 
 Relocation: VeriSign will provide a maximum of $1,500,000, minus applicable withholdings and deductions, in relocation benefits. A separate relocation agreement will be provided which will explain in further
detail the conditions which must be met for you to receive relocation funds. 
 Benefits: Your medical and insurance benefits will be
commensurate with those of other VeriSign employees. 
 Your employment with VeriSign is contingent upon (i) your execution and delivery, at the signing
of the Merger Agreement, of (a) this letter, (b) the Assignment of Invention, Nondisclosure and Nonsolicitation Agreement, attached hereto as Exhibit A, (c) the Noncompetition Agreement (as defined in the Merger Agreement and
(d) the Holdback Agreement (as defined in the Merger Agreement), (ii) your execution and delivery to VeriSign 

 
immediately prior to the start of your employment with VeriSign of all other applicable employment related forms or documents, (iii) the successful
completion of a background check to be completed within 20 days of the signing of the Merger Agreement, and (iv) the closing of the Acquisition. The provisions of this letter shall become null and void should the Acquisition not be consummated.
Should you choose to accept this offer of employment with VeriSign, your employment would be on an at-will basis, which means that either you or VeriSign can terminate the employment relationship at any time, either with or without cause.

 This letter, including the exhibits hereto, supersedes all employment agreements, whether in writing or oral, between you and the Company (collectively,
the “Original Employment Agreements”). Effective as of the Effective Time (as defined in the Merger Agreement), the Original Employment Agreements shall be null and void and all rights granted thereunder shall be of no further effect.

 We are pleased to have you join our team in the One VeriSign Journey. With your participation and commitment, we will draw closer to our goal to transform
and accelerate the adoption of commerce and communications around the world. We are confident we will achieve this goal, in great part due to our employees – our most valued and respected asset. So, once again, welcome to VeriSign,
“where it all comes together.” 
 Sincerely, 
  

			
	 /s/ Jamie Schultz
	 	

 Jamie Schultz 
 VeriSign, Inc. 
 Vice President, Human Resources 

							
				
	Signed:	 	 /s/ John M. Donovan
	 		 	Date: 11/28/06

 Exhibit A 
 Assignment of Invention, Nondisclosure and Nonsolicitation Agreement

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