Document:

Exhibit 10.19

 Exhibit 10.19 
  
 Summary of Directors’ Compensation 
  
 NewMarket Corporation (the “Company”) pays each of its non-employee directors (a) $1,500 for attendance at each
meeting of the Company’s Board of Directors (the “Board of Directors”) and (b) $1,500 for attendance at each meeting of a committee of the Board of Directors of which he or she is a member. In addition, the Company pays each of its
non-employee directors a quarterly fee of $6,250. The Company does not pay employee members of the Board of Directors separately for their service on the Board of Directors or its committees. 
  
 Any director who was elected to the Board of Directors on or before February
23, 1995 and who retires from the Board of Directors after age 60 with at least five years’ service on the Board of Directors will receive $12,000 per year for life, payable in quarterly installments. The service requirement for this benefit
may be waived under certain circumstances. Any director retiring under other circumstances will receive $12,000 per year, payable in quarterly installments, commencing no earlier than age 60, for a period not to exceed his or her years of service on
the Board of Directors. The payment period limitation on this benefit may be waived in certain circumstances. Such retirement payments to former directors may be discontinued under certain circumstances. 
  
 Under the NewMarket Corporation Non-Employee Directors’ Stock
Acquisition Plan (the “Non-Employee Directors’ Stock Plan”), each non-employee director is awarded on each July 1 that number of whole shares of the Company’s common stock that, when multiplied by the closing price of the
Company’s common stock on the immediately preceding business day, as reported in The Wall Street Journal, equal as nearly as possible but do not exceed $5,000. The shares of the Company’s common stock awarded under the Non-Employee
Directors’ Stock Plan are nonforfeitable and the recipient directors immediately and fully vest in the Company’s common stock issued under the Non-Employee Directors’ Stock Plan. Subject only to such limitations on transfer as may be
specified by applicable securities laws, directors may sell their shares under the Non-Employee Directors’ Stock Plan at any time. The Non-Employee Directors’ Stock Plan provides that no awards may be made after July 1, 2011. 

 
 Non-employee directors may defer, in 10% increments, all or part of their
retainer fee and meeting fees into either a deferred cash account or a deferred stock account, or a percentage of the fees into each of the accounts, both of which are unfunded and maintained for recordkeeping purposes only. Distributions under this
plan, paid in a single sum or in up to 10 annual installments, cannot begin within two years of the beginning of the deferral year. The maximum aggregate number of shares of the Company’s common stock that may be awarded under this plan is
100,000 shares.Fourth Amendment to Lease

 Exhibit 10.13 
  
 FOURTH AMENDMENT TO LEASE 
  
 This Fourth Amendment to Lease (“Amendment”) is entered into, and dated for reference purposes, as of December 15, 2004 (the “Execution
Date”) by and between METROPOLITAN LIFE INSURANCE COMPANY, a New York corporation (“Metropolitan”), as Landlord (“Landlord”), and MAXYGEN, INC., a Delaware corporation (“Maxygen”), as Tenant (“Tenant”),
with reference to the following facts (“Recitals”): 
  
 A. Landlord and Tenant entered into that Lease (the “Original Lease”) dated as of October 21, 1998 for certain premises consisting of the entire building known as 515 Galveston Drive (the “Original Premises” or “515
Galveston Premises”) Redwood City, California, as amended by that First Amendment to Lease dated as of February 26, 1999 (the “First Amendment”) for the lease of Expansion Space A (which may also be referred to as the “220
Penobscot Premises”), that certain written Second Amendment To Lease dated October 24, 2000 (the “Second Amendment”) for the lease of Expansion Space B (which may also be referred to as the “200 Penobscot Premises”) and that
certain written Third Amendment To Lease dated October 22, 2003 (the “Third Amendment”) for the surrender of all of the 220 Penobscot Premises and part of the 200 Penobscot Premises, all as more particularly described in the Original
Lease, First Amendment, Second Amendment and Third Amendment (collectively, the “Existing Lease”, and the Premises as of the Execution Date is collectively referred to as the “Existing Premises”). 
  
 B. Landlord and Tenant desire to extend the Term only for the 515 Galveston
Premises (and not for the portion of the Existing Premises at 200 Penobscot) and provide for other amendments of the Existing Lease as more particularly set forth below. 
  
 NOW, THEREFORE, in consideration of the foregoing, and of the mutual covenants set forth herein and of other good and
valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereto agree as follows: 
  
 Section 1. Scope of Amendment; Defined Terms. Except as expressly provided in this Amendment, the Existing Lease shall remain in full force
and effect. Should any inconsistency arise between this Amendment and the Existing Lease as to the specific matters which are the subject of this Amendment, the terms and conditions of this Amendment shall control. The term “Lease” as used
herein and in the Existing Lease shall refer to the Existing Lease as modified by this Amendment, except as expressly provided in this Amendment. All capitalized terms used in this Amendment and not defined herein shall have the meanings set forth
in the Existing Lease unless the context clearly requires otherwise. 
  
 Section 2. Extension of Term for 515 Galveston Premises. Notwithstanding any provision of the Existing Lease to the contrary, Landlord and Tenant acknowledge and agree as follows: 
  
 (a) The current Term pursuant to the Existing Lease will expire on February
24, 2005. 
  
 (b) February 24, 2005 shall continue to be the
Expiration Date of the Term for only that portion of the Existing Premises at 200 Penobscot Drive, which is agreed to be 10,597 square feet of Rentable Area. No later than 11:59 p.m. on February 24, 2005, Tenant shall vacate and deliver to Landlord
exclusive possession of such space pursuant to the same provisions and requirements of the Lease that apply upon expiration of the Term of the Lease. As of such date and time, the monetary obligations with respect to such space shall be prorated,
billed and payable in the manner provided in the Lease upon expiration of the Term of the Lease. Tenant shall deliver to Landlord any plans and specifications, maintenance records, warranties, permits, approvals and licenses pertaining to such space
or to any improvements remaining thereon, or to both (but not pertaining to Tenant’s business conducted therein) in the possession of Tenant, or copies thereof. In the event that Tenant fails timely to vacate and deliver exclusive possession of
any part of such space to Landlord as required under this Subsection and the Lease, then Tenant shall be holding over as to the entirety of such space, and such holding over shall be upon and subject to all the covenants, agreements, terms,
provisions and conditions of this Lease applicable to a holding over, including, without limitation, Article Thirteen of the Lease. 
  
 (c) For the remainder of the Existing Premises, which is all of the 515 Galveston Premises consisting of an agreed 31,166 square feet of Rentable Area,
the Term is hereby extended for the period of twenty-four (24) months (the “Extended Term”) commencing on February 25 2005 (the “Extension Commencement Date”) and expiring February 24, 2007 (hereafter, the “Expiration
Date” in lieu of the date provided in the Existing Lease), unless sooner terminated pursuant to the terms of the Lease. References herein or in the Lease to the Premises shall, for the period after February 24, 2005, be deemed to mean the 515
Galveston Premises unless the context clearly requires otherwise. 
  
 (d) Landlord and Tenant acknowledge and agree that this Amendment provides all rights and obligations of the parties with respect to extension of the current Term, whether or not in accordance with any other provisions, if any, of the
Existing Lease regarding renewal or extension, and any such provisions, options or rights for renewal or extension provided in the Existing Lease are hereby deleted as of the Execution Date, and without limiting the generality of the foregoing,
Tenant and Landlord acknowledge and agree that the Option to Extend set forth in Section 3 of Rider 2 of the Existing Lease is hereby deleted as of the Execution Date. 
  
 Section 3. Monthly Base Rent for Extended Term. Notwithstanding any provision of the Existing Lease to the
contrary, commencing on the Extension Commencement Date and continuing through the Expiration Date of the Extended Term, the amount of Monthly Base Rent due and payable by Tenant for the Premises shall be as set forth in the table below: 

 

					
	 Period from/to (inclusive)

	  	Monthly Installment of
Monthly Base Rent

	  	Monthly Rate/Rentable Sq. Ft.

	 Months 01 – 12
	  	$57,657.10	  	$1.85
	 Months 13 – 24
	  	$59,215.40	  	$1.90

  

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 Section 4. Tenant’s Share of Operating Expenses. Notwithstanding any provision of the
Existing Lease to the contrary, the parties acknowledge and agree that the Rentable Area of Phase I is 301,824, and commencing on the Extension Commencement Date and continuing through the Expiration Date of the Extended Term, Tenant shall continue
to pay Tenant’s Share of Operating Expenses as set forth in Article Four of the Existing Lease, and as of the Extension Commencement Date, Tenant’s Share for the Existing Premises is agreed to be as follows: 
  

				
	 Tenant’s Building Share:
	  	100.00	%
	 Tenant’s Phase Share:
	  	10.33	%
	 Tenant’s Project Share:
	  	5.80	%

  
 Section 5.
Decrease in the Security Deposit. Notwithstanding any provision of the Existing Lease to the contrary, within thirty days after execution of this Amendment Landlord shall return to Tenant the sum of Six Hundred Thirty-five Thousand Three
Hundred Thirty-four Dollars ($635,334.00) of the Security Deposit to decrease the amount of the Security Deposit required in Section 1.01(14) of the Existing Lease, as amended by Section 3 of the First Amendment, Section 4 of the Second Amendment
and Section 3(d)(ii) of the Third Amendment, from the amount of Six Hundred Ninety-four Thousand Three Hundred Thirty-four Dollars ($694,334.00) to the amount of Fifty-nine Thousand Dollars ($59,000.00), which lesser amount is the Security Deposit
hereafter required under the Lease. 
  
 Section 6.
Parking. Notwithstanding any provision of the Existing Lease to the contrary, commencing on the Extension Commencement Date and continuing through the Expiration Date of the Extended Term, the aggregate number of parking spaces provided for
Tenant’s use shall be 103 parking spaces. 
  
 Section
7. “AS IS” Condition. Notwithstanding any provision of the Existing Lease to the contrary, Tenant hereby leases for the Extended Term and accepts the Existing Premises in its “AS IS” condition existing on the Execution
Date, without any express or implied representations or warranties of any kind by Landlord, its brokers, manager or agents, or the employees of any of them regarding the Existing Premises; and Landlord shall not have any obligation to construct or
install any tenant improvements or alterations or to pay for any such construction or installation. Tenant acknowledges that Tenant presently occupies and has occupied the 515 Galveston Premises since the Commencement Date of the Original Lease.

  
 Section 8. Surrender of Premises.
Notwithstanding any provision of the Existing Lease to the contrary, including Section 12.01, no later than the Termination Date: (i) if the County of San Mateo Department of Environmental Health does not then issue a “Business Closure
Report”, Tenant shall deliver to Landlord the equivalent confirmation of business closure in compliance with Environmental Laws then issued by the County of San Mateo Department of Environmental Health, and (ii) if a radiation license (or
radioactive material license or similar permit with respect to radioactive material) was obtained from the applicable governmental authority for the Premises or any operation therein, or was required by Environmental Laws to be obtained, then Tenant
shall deliver to Landlord a “Radioactive Material License Termination”, and if the applicable governmental authority does not then issue a “Radioactive Material License Termination”, Tenant shall deliver to Landlord the
equivalent confirmation of closure of the site in compliance with Environmental Laws applicable to radioactive material then issued by the applicable governmental authority. 
  
 Section 9. Amendment of Definition of Tenant Affiliate in Section 10.06. The last sentence of Section 10.06 of
the Original Lease is hereby amended to delete the phrase “fifty-one percent (51%)” and substitute in its place “sixty percent (60%)”. 
  
 Section 10. Cross Default. Section 11.01 of the Original Lease is hereby amended to add at the end thereof the following additional event
which shall constitute a “Default”: 
  
 “or 
  
 (x) if Tenant or any Tenant
Affiliate holding any other lease with Landlord for premises in the Project is in default under such lease after any applicable notice and grace period or cure period.” 
  
 Section 11. Monument Signage. 
  
 (a) Grant of Right. Notwithstanding any provision of Section 6.06 of the Existing Lease to the contrary, so long as
Tenant is in continuous operation at and occupancy of at least fifty percent (50%) of the entire Premises, Tenant shall have the right to maintain Tenant identification (as existing as of the Execution Date hereof) on one line of the existing,
exterior monument sign for the Building in which the Premises are located, subject to the terms and conditions set forth in this Section (“Exterior Sign Right”). 
  
 (b) General Conditions & Requirements. The size, type, style, materials, color, method of installation and exact
location of the sign, and the contractor for and all work in connection with the sign, contemplated by this Section shall (i) be subject to Tenant’s compliance with all applicable laws, regulations and ordinances and with any covenants,
conditions and restrictions of record which affect the Property; (ii) 

  

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be subject to Tenant’s compliance with all requirements of Landlord’s current Project signage criteria at the time of installation; (iii) be
consistent with the design of the Building and the Project; (iv) be further subject to Landlord’s prior written consent. Tenant shall, at its sole cost and expense, procure, install, maintain in first class appearance and condition, and remove
such sign. 
  
 (c) Removal & Restoration. Upon the
expiration or termination of the Exterior Sign Right, but in no event later than the expiration of the Term or earlier termination of the Lease, Tenant shall, at its sole cost and expense, remove such sign and shall repair and restore the area in
which the sign was located to its condition prior to installation of such sign. 
  
 (d) Right Personal. The Exterior Sign Right under this Section is personal to Maxygen and may not be used by, and shall not be transferable or assignable (voluntarily or involuntarily) to any person or entity
other than an assignee of the Lease which has satisfied the requirements of Article Ten of the Lease. 
  
 Section 12. Option to Extend. 
  
 (a) Landlord hereby grants Tenant a single option to extend the Extended Term of the Lease for an additional period of one (1) year (such period may be
referred to as the “Option Term”), as to the entire Premises as it may then exist, upon and subject to the terms and conditions of this Section (the “Option To Extend”), and provided that at the time of exercise of such right:
(i) Tenant must be in occupancy of the entire Premises; (ii) so long as Landlord hereunder is also the landlord under that certain lease to Tenant of all of Building 9 (301 Galveston Drive), Tenant then has all of Building 9 under lease from
Landlord, Tenant is in occupancy of all of Building 9 and Tenant has duly exercised the option to extend such lease in accordance with its terms; and (iii) Tenant then has a liquid net worth of no less than Seventy-five Million Dollars
($75,000,000.00), and such determination of liquid net worth shall count as assets of Tenant only cash, cash equivalents and liquid investments, and such determination shall be certified by Tenant’s Chief Financial Officer, and supported by
Tenant’s financial statements, copies of which shall be delivered to Landlord with Tenant’s written notice exercising its right hereunder. Such supporting financial statements to be delivered to Landlord shall consist of Tenant’s
audited financial statements for the most-recent, completed fiscal year, and Tenant’s financial statements for all fiscal quarters completed after the end of the most-recent, completed fiscal year and before the date of Tenant’s Election
Notice, with the financial statements for the most-recent, completed quarter certified by Tenant’s Chief Financial Officer. 
  
 (b) Tenant’s election (the “Election Notice”) to exercise the Option To Extend must be given to Landlord in writing no earlier than the
date which is nine months (9) months before the Expiration Date and no later than the date which is six (6) months before the Expiration Date. If Tenant either fails or elects not to exercise its Option to Extend by not timely giving its Election
Notice, then the Option to Extend shall be null and void. 
  
 (c)
The Option Term shall commence immediately after the expiration of the Extended Term of the Lease. Tenant’s leasing of the Premises during the Option Term shall be upon and subject to the same terms and conditions contained in the Lease except
that (i) the Monthly Base Rent for the Premises hereunder shall increase to a monthly rate equal to One and 96/100 Dollars ($1.96) per square foot of Rentable Area of the Premises for the Option Term, and Tenant shall continue to pay Tenant’s
Share of Operating Expenses pursuant to the Lease (along with all expenses paid directly by Tenant to the utility or service provider, which direct payments shall continue to be Tenant’s obligation); (ii) Tenant shall accept the Premises in its
“AS-IS” condition without any obligation of Landlord to repaint, remodel, repair, improve or alter the Premises or to provide Tenant any allowance therefor; and (iii) there shall be no further option or right to extend the term of the
Lease. If Tenant timely and properly exercises the Option To Extend, references in the Lease to the Term shall be deemed to mean the Extended Term as further extended by the Option Term unless the context clearly requires otherwise. 
  
 (d) This Option to Extend is personal to Maxygen, Inc. and may not be used
by, and shall not be transferable or assignable (voluntarily or involuntarily) to any person or entity except an assignee of the Lease which is a Tenant Affiliate and has satisfied the requirements of Article Ten of the Lease applicable to a Tenant
Affiliate. 
  
 (e) Upon the occurrence of any of the following
events, Landlord shall have the option, exercisable at any time prior to commencement of the Option Term, to terminate all of the provisions of this Section with respect to the Option to Extend, with the effect of canceling and voiding any prior or
subsequent exercise so this Option to Extend is of no force or effect: 
  
 (i) Tenant’s failure to timely exercise the Option to Extend in accordance with the provisions of this Section. 
  
 (ii) The existence at the time Tenant exercises the Option to Extend of any default on the part of Tenant under the Lease or of any state of facts which
with the passage of time or the giving of notice, or both, would constitute such a default. 
  
 (iii) Tenant’s third default under the Lease prior to the time Tenant exercises the Option to Extend, notwithstanding that all such defaults may subsequently be cured. 
  
 (f) Without limiting the generality of any provision of the Lease, time shall
be of the essence with respect to all of the provisions of this Section. 
  
 Section 13. Brokers. Tenant represents that in connection with this Amendment it is represented by CRESA Partners (“Tenant’s Broker”) and, except for Tenant’s Broker and
Landlord’s Broker (defined below), Tenant has not dealt with any real estate broker, sales person, or finder in connection with this Amendment, and no such person initiated or participated in the negotiation of this Amendment. Tenant hereby
indemnifies and agrees to protect, defend and hold Landlord and Landlord’s Broker harmless from 

  

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and against all claims, losses, damages, liability, costs and expenses (including, without limitation, attorneys’ fees and expenses) by virtue of any
broker, agent or other person claiming a commission or other form of compensation by virtue of alleged representation of, or dealings or discussions with, Tenant with respect to the subject matter of this Amendment, except for Landlord’s Broker
and except for a commission payable to Tenant’s Broker to the extent provided for in a separate written agreement between Tenant’s Broker and Landlord’s Broker. Landlord represents that in connection with this Amendment it is
represented by Cornish & Carey Commercial and Shepard Land Company (“Landlord’s Broker”) and, except for Landlord’s Broker and Tenant’s Broker, Landlord has not dealt with any real estate broker, sales person, or finder
in connection with the subject matter of this Amendment. Tenant is not obligated to pay or fund any amount to Landlord’s Broker, and Landlord hereby agrees to pay such commission, if any, to which Landlord’s Broker is entitled in
connection with the subject matter of this Amendment pursuant to Landlord’s separate written agreement with Landlord’s Broker. Landlord hereby indemnifies and agrees to protect, defend and hold Tenant harmless from and against all claims,
losses, damages, liability, costs and expenses (including, without limitation, attorneys’ fees and expenses) by virtue of any broker, agent or other person claiming a commission or other form of compensation by virtue of alleged representation
of Landlord with respect to the transaction contemplated by this Amendment. The provisions of this Section shall survive the expiration or earlier termination of the Amendment or the Lease. 
  
 Section 14. Time of Essence. Without limiting the generality of
any other provision of the Lease, time is of the essence to each and every term and condition of this Amendment. 
  
 Section 15. Attorneys’ Fees. Each party to this Amendment shall bear its own attorneys’ fees and costs incurred in connection with
the discussions preceding, negotiations for and documentation of this Amendment. In the event that either party brings any suit or other proceeding with respect to the subject matter or enforcement of this Amendment or the Lease, the parties
acknowledge and agree that the provisions of Section 11.03 of the Existing Lease shall apply. 
  
 Section 16. Effect of Headings; Recitals; Exhibits. The titles or headings of the various parts or sections hereof are intended solely for convenience and are not intended and shall not be deemed to or
in any way be used to modify, explain or place any construction upon any of the provisions of this Amendment. Any and all Recitals set forth at the beginning of this Amendment are true and correct and constitute a part of this Amendment as if they
had been set forth as covenants herein. Exhibits, schedules, plats and riders hereto which are referred to herein are a part of this Amendment. 
  
 Section 17. Entire Agreement; Amendment. This Amendment taken together with the Existing Lease, together with all exhibits, schedules,
riders and addenda to each, constitutes the full and complete agreement and understanding between the parties hereto and shall supersede all prior communications, representations, understandings or agreements, if any, whether oral or written,
concerning the subject matter contained in this Amendment and the Existing Lease, as so amended, and no provision of the Lease as so amended may be modified, amended, waived or discharged, in whole or in part, except by a written instrument executed
by all of the parties hereto. 
  
 Section 18.
Authority. Each party represents and warrants to the other that it has full authority and power to enter into and perform its obligations under this Amendment, that the person executing this Amendment is fully empowered to do so, and that no
consent or authorization is necessary from any third party. Landlord may request that Tenant provide Landlord evidence of Tenant’s authority. 
  

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 Section 19. Counterparts. This Amendment may be executed in duplicates or counterparts, or
both, and such duplicates or counterparts together shall constitute but one original of the Amendment, and the signature of any party to any counterpart shall be deemed a signature to, and may be appended to, any other counterpart. Each duplicate
and counterpart shall be equally admissible in evidence, and each original shall fully bind each party who has executed it. 
  
 IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of the date first set forth above. 
  

							
	      TENANT:	  	MAXYGEN, INC.,
	 	  	a Delaware corporation
			
	 	  	By:	 	 /s/ B.S. Gill

	 	  	 	 	Print Name:	 	 B.S. Gill

			
	 	  	 	 	 Title:      President

	 	  	 	 	(Chairman of Board, President or Vice President)
			
	 	  	By:	 	 /s/ Lawrence W. Briscoe

	 	  	 	 	Print Name:	 	 Lawrence W. Briscoe

			
	 	  	 	 	 Title:      CFO

	 	  	 	 	(Secretary, Assistant Secretary, CFO or Assistant Treasurer)
		
	      LANDLORD:	  	METROPOLITAN LIFE INSURANCE COMPANY,
	 	  	a New York corporation
			
	 	  	By:	 	 /s/ Joel R. Redmon

	 	  	 	 	Print Name:	 	 Joel R. Redmon

	 	  	 	 	 Title:      Assistant Vice-President

  

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