Document:

Exhibit 4.3

 Exhibit 4.3 
  
 SECOND SUPPLEMENTAL INDENTURE 
  

SECOND SUPPLEMENTAL INDENTURE (this “Second Supplemental Indenture”), dated as of
July 1, 2004, among NewMarket Corporation, a Virginia corporation (“NewMarket”), Afton Chemical SPRL, a société privée à responsibilité limitée organized under the laws of the Kingdom
of Belgium and an indirect wholly-owned subsidiary of NewMarket (the “Guaranteeing Subsidiary”), and Wells Fargo Bank, National Association, as trustee under the Indenture referred to below (the “Trustee”).

  
 W I T N E S S E T H 
  
 WHEREAS, Ethyl Corporation, a Virginia corporation and wholly-owned
subsidiary of NewMarket (“Ethyl”), has heretofore executed and delivered to the Trustee an indenture, dated as of April 30, 2003 (the “Initial Indenture”), providing for the issuance of 8.875% Senior Notes due
2010 (the “Notes”); and 
  
 WHEREAS, pursuant to
an Agreement and Plan of Merger, dated as of March 5, 2004 (the “Plan of Merger”), by and among NewMarket, Ethyl and Ethyl Merger Sub, Inc., a wholly-owned subsidiary of NewMarket, NewMarket became the holding company for Ethyl
effective as of June 18, 2004 (the “Holding Company Formation”); and 
  
 WHEREAS, pursuant to the Supplemental Indenture, dated as of June 18, 2004 (the “Supplemental Indenture” and together with the Initial Indenture, the “Indenture”), among
NewMarket, Ethyl, the Guaranteeing Subsidiaries (as defined therein), the other Guarantors named on the signature pages thereto and the Trustee, NewMarket agreed to assume all of Ethyl’s obligations under the Indenture and the Notes; and

  
 WHEREAS, the Board of Directors of Ethyl has determined that
it is in the best interests of Ethyl and its shareholders that, following the effectiveness of the Holding Company Formation, Ethyl effectuate an internal restructuring to better align its lines of businesses among its subsidiaries (the
“Internal Reorganization”); and 
  
 WHEREAS, in
connection with the Internal Restructuring, Ethyl has created the Guaranteeing Subsidiary as an indirect wholly-owned subsidiary; and 
  
 WHEREAS, in accordance with Section 4.17 of the Indenture, the Guaranteeing Subsidiary has agreed to execute and deliver to the Trustee a
supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of NewMarket’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note
Guarantee”); and 
  
 WHEREAS, pursuant to
Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Second Supplemental Indenture. 
  
 NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, NewMarket,
the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 
  
 1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to
them in the Indenture. 
  
 2.
AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees as follows: 
  

	 	(a)	 	Along with all Guarantors named in the Indenture, to jointly and severally Guarantee to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its
successors and assigns, the Notes or the obligations of NewMarket hereunder or thereunder, that: 

  

	 	(i)	 the principal of, and premium and Liquidated Damages, if any, and interest on the Notes will be promptly paid in full when due, whether at maturity, by
acceleration, redemption or 

	 	 
otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of NewMarket to the Holders or
the Trustee hereunder or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 

  

	 	(ii)	in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that same will be promptly paid in full when due or performed in accordance
with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so guaranteed or any performance so guaranteed for whatever reason, the Guarantors shall be jointly and
severally obligated to pay the same immediately. 

  

	 	(b)	 	The obligations hereunder shall be unconditional, irrespective of the validity, regularity or enforceability of the Notes or the Indenture, the absence of any action to enforce the
same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against NewMarket, any action to enforce the same or any other circumstance which might otherwise constitute a
legal or equitable discharge or defense of a Guarantor. 

  

	 	(c)	 	The following is hereby waived: diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of NewMarket, any right to require
a proceeding first against NewMarket, protest, notice and all demands whatsoever. 

  

	 	(d)	 	This Note Guarantee shall not be discharged except by complete performance of the obligations contained in the Notes and the Indenture, and the Guaranteeing Subsidiary accepts all
obligations of a Guarantor under the Indenture. 

  

	 	(e)	 	If any Holder or the Trustee is required by any court or otherwise to return to NewMarket, the Guarantors, or any custodian, trustee, liquidator or other similar official acting in
relation to either NewMarket or the Guarantors, any amount paid by either to the Trustee or such Holder, this Note Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect. 

  

	 	(f)	 	The Guaranteeing Subsidiary shall not be entitled to any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all
obligations guaranteed hereby. 

  

	 	(g)	 	As between the Guarantors, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations guaranteed hereby may be accelerated as
provided in Article 6 of the Indenture for the purposes of this Note Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (y) in the event of any
declaration of acceleration of such obligations as provided in Article 6 of the Indenture, such obligations (whether or not due and payable) shall forthwith become due and payable by the Guarantors for the purpose of this Note Guarantee.

  

	 	(h)	 	The Guarantors shall have the right to seek contribution from any non-paying Guarantor so long as the exercise of such right does not impair the rights of the Holders under the Note
Guarantee. 

  

	 	(i)	 	Pursuant to Section 10.02 of the Indenture, after giving effect to any maximum amount and all other contingent and fixed liabilities that are relevant under any applicable
Bankruptcy or fraudulent conveyance laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under
Article 10 of the Indenture, this new Note Guarantee shall be limited to the maximum amount permissible such that the obligations of such Guarantor under this Note Guarantee will not constitute a fraudulent transfer or conveyance.

  
 3. EXECUTION
AND DELIVERY. The Guaranteeing Subsidiary agrees that the Note Guarantees shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee. 
  

 2 

 4. GUARANTEEING SUBSIDIARY MAY
CONSOLIDATE, ETC. ON CERTAIN TERMS. 
  

	 	(a)	 	The Guaranteeing Subsidiary may not sell or otherwise dispose of all substantially all of its assets to, or consolidate with or merge with or into (whether or not such Guarantor is
the surviving Person) another Person, other than NewMarket or another Guarantor unless: 

  

	 	(i)	immediately after giving effect to such transaction, no Default or Event of Default exists; and 

  

	 	(ii)	either (A) subject to Sections 10.04 and 10.05 of the Indenture, the Person acquiring the property in any such sale or disposition or the Person formed by or surviving any such
consolidation or merger unconditionally assumes all the obligations of that Guarantor, pursuant to a supplemental indenture in form and substance reasonably satisfactory to the Trustee, under the Notes, the Indenture and the Note Guarantee on the
terms set forth herein or therein; or (B) the Net Proceeds of such sale or other disposition are applied in accordance with the applicable provisions of the Indenture, including without limitation, Section 4.10 thereof.

  

	 	(b)	 	In case of any such consolidation, merger, sale or conveyance and upon the assumption by the successor Person, by supplemental indenture, executed and delivered to the Trustee and
satisfactory in form to the Trustee, of the Note Guarantee endorsed upon the Notes and the due and punctual performance of all of the covenants and conditions of the Indenture to be performed by the Guarantor, such successor Person shall succeed to
and be substituted for the Guarantor with the same effect as if it had been named herein as a Guarantor. Such successor Person thereupon may cause to be signed any or all of the Note Guarantees to be endorsed upon all of the Notes issuable under the
Indenture which theretofore shall not have been signed by NewMarket and delivered to the Trustee. All the Note Guarantees so issued shall in all respects have the same legal rank and benefit under the Indenture as the Note Guarantees theretofore and
thereafter issued in accordance with the terms of the Indenture as though all of such Note Guarantees had been issued at the date of the execution hereof. 

  

	 	(c)	 	Except as set forth in Articles 4 and 5 and Section 10.05 of Article 10 of the Indenture, and notwithstanding clauses (a) and (b) above, nothing contained in the
Indenture or in any of the Notes shall prevent any consolidation or merger of a Guarantor with or into NewMarket or another Guarantor, or shall prevent any sale or conveyance of the property of a Guarantor as an entirety or substantially as an
entirety to NewMarket or another Guarantor. 

  
 5. RELEASES. 
  

	 	(a)	 	In the event of any sale or other disposition of all or substantially all of the assets of any Guarantor, by way of merger, consolidation or otherwise, or a sale or other
disposition of all of the capital stock of any Guarantor, in each case to a Person that is not (either before or after giving effect to such transaction) a Restricted Subsidiary of NewMarket, then such Guarantor (in the event of a sale or other
disposition, by way of merger, consolidation or otherwise, of all of the capital stock of such Guarantor) or the corporation acquiring the property (in the event of a sale or other disposition of all or substantially all of the assets of such
Guarantor) will be released and relieved of any obligations under its Note Guarantee; provided that the Net Proceeds of such sale or other disposition are applied in accordance with the applicable provisions of the Indenture, including
without limitation Section 4.10 of the Indenture. Upon delivery by NewMarket to the Trustee of an Officers’ Certificate and an Opinion of Counsel to the effect that such sale or other disposition was made by NewMarket in accordance with
the provisions of the Indenture, including without limitation Section 4.10 of the Indenture, the Trustee shall execute any documents reasonably required in order to evidence the release of any Guarantor from its obligations under its Note
Guarantee. 

  

	 	(b)	 	Any Guarantor not released from its obligations under its Note Guarantee shall remain liable for the full amount of principal of and interest on the Notes and for the other
obligations of any Guarantor under the Indenture as provided in Article 10 of the Indenture. 

  

 3 

 6. NO RECOURSE AGAINST
OTHERS. No past, present or future director, officer, employee, incorporator, stockholder, member or agent of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of NewMarket or any Guaranteeing
Subsidiary under the Notes, any Note Guarantees, the Indenture or this Second Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives
and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver
is against public policy. 
  
 7. NEW YORK LAW TO
GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SECOND SUPPLEMENTAL INDENTURE BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF
ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 
  
 8. COUNTERPARTS. The parties may sign any number of copies of this Second Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 
  
 9. EFFECT OF
HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof. 
  
 10. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the
validity or sufficiency of this Second Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and NewMarket. 
  
 [Signature page follows] 
  

 4 

 IN WITNESS WHEREOF, the parties hereto have caused this Second Supplemental Indenture to be duly
executed, all as of the date first above written. 
  

			
	AFTON CHEMICAL SPRL
		
	By:	 	 /s/ Trevor J. Gigg

	Name:	 	Trevor J. Gigg
	Title:	 	Business Manager
	
	NEWMARKET CORPORATION
		
	By:	 	 /s/ David A. Fiorenza

	Name:	 	David A. Fiorenza
	Title:	 	Vice President and Treasurer
	
	 WELLS FARGO BANK, NATIONAL ASSOCIATION,
 as Trustee

		
	By:	 	 Joseph P. O’Donnell

		 	Authorized Signatory

  

 5Exhibit 4.4

 Exhibit 4.4 
  
 THIRD SUPPLEMENTAL INDENTURE 
  

THIRD SUPPLEMENTAL INDENTURE (this “Third Supplemental Indenture”), dated as of
November 2, 2004, among NewMarket Corporation, a Virginia corporation (“NewMarket”), Old Town LLC, a Virginia limited liability company and an indirect wholly-owned subsidiary of NewMarket (the “Guaranteeing
Subsidiary”), and Wells Fargo Bank, National Association, as trustee under the Indenture referred to below (the “Trustee”). 
  
 W I T N E S S E T H 
  
 WHEREAS, Ethyl Corporation, a Virginia corporation and wholly-owned subsidiary of NewMarket (“Ethyl”), has heretofore executed and
delivered to the Trustee an indenture, dated as of April 30, 2003 (the “Initial Indenture”), providing for the issuance of 8.875% Senior Notes due 2010 (the “Notes”); and 
  
 WHEREAS, pursuant to an Agreement and Plan of Merger, dated as of
March 5, 2004 (the “Plan of Merger”), by and among NewMarket, Ethyl and Ethyl Merger Sub, Inc., a wholly-owned subsidiary of NewMarket, NewMarket became the holding company for Ethyl effective as of June 18, 2004 (the
“Holding Company Formation”); and 
  
 WHEREAS,
pursuant to the Supplemental Indenture, dated as of June 18, 2004 (the “Supplemental Indenture” and together with the Initial Indenture, the “Indenture”), among NewMarket, Ethyl, the Guaranteeing Subsidiaries
(as defined therein), the other Guarantors named on the signature pages thereto and the Trustee, NewMarket agreed to assume all of Ethyl’s obligations under the Indenture and the Notes; and 
  
 WHEREAS, NewMarket Services Corporation, a Virginia corporation and wholly
owned subsidiary of NewMarket (“NewMarket Services”) acquired all of the outstanding membership units of Old Town LLC, a Virginia limited liability company (“Old Town”); and 
  
 WHEREAS, the Indenture provides that certain newly organized or newly
acquired subsidiaries of NewMarket shall execute and deliver to the Trustee a supplemental indenture pursuant to which such subsidiary shall unconditionally guarantee all of NewMarket’s obligations under the Notes and the Indenture; and

  
 WHEREAS, in accordance with Section 4.17 of the
Indenture, the Guaranteeing Subsidiary has agreed to execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of NewMarket’s Obligations under the Notes and
the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and 
  
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Third Supplemental Indenture. 

 
 NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, NewMarket, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 
  
 1. CAPITALIZED TERMS.
Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture. 
  
 2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees as follows: 

 

	 	(a)	 	Along with all Guarantors named in the Indenture, to jointly and severally guarantee to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its
successors and assigns, the Notes or the obligations of NewMarket hereunder or thereunder, that: 

  

	 	(i)	 the principal of, and premium and Liquidated Damages, if any, and interest on the Notes will be promptly paid in full when due, whether at maturity, by
acceleration, redemption or 

	 	 
otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of NewMarket to the Holders or
the Trustee hereunder or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 

  

	 	(ii)	in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that same will be promptly paid in full when due or performed in accordance
with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so guaranteed or any performance so guaranteed for whatever reason, the Guarantors shall be jointly and
severally obligated to pay the same immediately. 

  

	 	(b)	 	The obligations hereunder shall be unconditional, irrespective of the validity, regularity or enforceability of the Notes or the Indenture, the absence of any action to enforce the
same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against NewMarket, any action to enforce the same or any other circumstance which might otherwise constitute a
legal or equitable discharge or defense of a Guarantor. 

  

	 	(c)	 	The following is hereby waived: diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of NewMarket, any right to require
a proceeding first against NewMarket, protest, notice and all demands whatsoever. 

  

	 	(d)	 	This Note Guarantee shall not be discharged except by complete performance of the obligations contained in the Notes and the Indenture, and the Guaranteeing Subsidiary accepts all
obligations of a Guarantor under the Indenture. 

  

	 	(e)	 	If any Holder or the Trustee is required by any court or otherwise to return to NewMarket, the Guarantors, or any custodian, trustee, liquidator or other similar official acting in
relation to either NewMarket or the Guarantors, any amount paid by either to the Trustee or such Holder, this Note Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect. 

  

	 	(f)	 	The Guaranteeing Subsidiary shall not be entitled to any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all
obligations guaranteed hereby. 

  

	 	(g)	 	As between the Guarantors, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations guaranteed hereby may be accelerated as
provided in Article 6 of the Indenture for the purposes of this Note Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (y) in the event of any
declaration of acceleration of such obligations as provided in Article 6 of the Indenture, such obligations (whether or not due and payable) shall forthwith become due and payable by the Guarantors for the purpose of this Note Guarantee.

  

	 	(h)	 	The Guarantors shall have the right to seek contribution from any non-paying Guarantor so long as the exercise of such right does not impair the rights of the Holders under the Note
Guarantee. 

  

	 	(i)	 	Pursuant to Section 10.02 of the Indenture, after giving effect to any maximum amount and all other contingent and fixed liabilities that are relevant under any applicable
Bankruptcy or fraudulent conveyance laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under
Article 10 of the Indenture, this new Note Guarantee shall be limited to the maximum amount permissible such that the obligations of such Guarantor under this Note Guarantee will not constitute a fraudulent transfer or conveyance.

  
 3. EXECUTION
AND DELIVERY. The Guaranteeing Subsidiary agrees that the Note Guarantees shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee. 
  

 2 

 4. GUARANTEEING SUBSIDIARY MAY
CONSOLIDATE, ETC. ON CERTAIN TERMS. 
  

	 	(a)	 	The Guaranteeing Subsidiary may not sell or otherwise dispose of all substantially all of its assets to, or consolidate with or merge with or into (whether or not such Guarantor is
the surviving Person) another Person, other than NewMarket or another Guarantor unless: 

  

	 	(i)	immediately after giving effect to such transaction, no Default or Event of Default exists; and 

  

	 	(ii)	either (A) subject to Sections 10.04 and 10.05 of the Indenture, the Person acquiring the property in any such sale or disposition or the Person formed by or surviving any such
consolidation or merger unconditionally assumes all the obligations of that Guarantor, pursuant to a supplemental indenture in form and substance reasonably satisfactory to the Trustee, under the Notes, the Indenture and the Note Guarantee on the
terms set forth herein or therein; or (B) the Net Proceeds of such sale or other disposition are applied in accordance with the applicable provisions of the Indenture, including without limitation, Section 4.10 thereof.

  

	 	(b)	 	In case of any such consolidation, merger, sale or conveyance and upon the assumption by the successor Person, by supplemental indenture, executed and delivered to the Trustee and
satisfactory in form to the Trustee, of the Note Guarantee endorsed upon the Notes and the due and punctual performance of all of the covenants and conditions of the Indenture to be performed by the Guarantor, such successor Person shall succeed to
and be substituted for the Guarantor with the same effect as if it had been named herein as a Guarantor. Such successor Person thereupon may cause to be signed any or all of the Note Guarantees to be endorsed upon all of the Notes issuable under the
Indenture which theretofore shall not have been signed by NewMarket and delivered to the Trustee. All the Note Guarantees so issued shall in all respects have the same legal rank and benefit under the Indenture as the Note Guarantees theretofore and
thereafter issued in accordance with the terms of the Indenture as though all of such Note Guarantees had been issued at the date of the execution hereof. 

  

	 	(c)	 	Except as set forth in Articles 4 and 5 and Section 10.05 of Article 10 of the Indenture, and notwithstanding clauses (a) and (b) above, nothing contained in the
Indenture or in any of the Notes shall prevent any consolidation or merger of a Guarantor with or into NewMarket or another Guarantor, or shall prevent any sale or conveyance of the property of a Guarantor as an entirety or substantially as an
entirety to NewMarket or another Guarantor. 

  
 5. RELEASES. 
  

	 	(a)	 	In the event of any sale or other disposition of all or substantially all of the assets of any Guarantor, by way of merger, consolidation or otherwise, or a sale or other
disposition of all of the capital stock of any Guarantor, in each case to a Person that is not (either before or after giving effect to such transaction) a Restricted Subsidiary of NewMarket, then such Guarantor (in the event of a sale or other
disposition, by way of merger, consolidation or otherwise, of all of the capital stock of such Guarantor) or the corporation acquiring the property (in the event of a sale or other disposition of all or substantially all of the assets of such
Guarantor) will be released and relieved of any obligations under its Note Guarantee; provided that the Net Proceeds of such sale or other disposition are applied in accordance with the applicable provisions of the Indenture, including
without limitation Section 4.10 of the Indenture. Upon delivery by NewMarket to the Trustee of an Officers’ Certificate and an Opinion of Counsel to the effect that such sale or other disposition was made by NewMarket in accordance with
the provisions of the Indenture, including without limitation Section 4.10 of the Indenture, the Trustee shall execute any documents reasonably required in order to evidence the release of any Guarantor from its obligations under its Note
Guarantee. 

  

	 	(b)	 	Any Guarantor not released from its obligations under its Note Guarantee shall remain liable for the full amount of principal of and interest on the Notes and for the other
obligations of any Guarantor under the Indenture as provided in Article 10 of the Indenture. 

  

 3 

 6. NO RECOURSE AGAINST
OTHERS. No past, present or future director, officer, employee, incorporator, stockholder, member or agent of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of NewMarket or any Guaranteeing
Subsidiary under the Notes, any Note Guarantees, the Indenture or this Third Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives
and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver
is against public policy. 
  
 7. NEW YORK LAW TO
GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS THIRD SUPPLEMENTAL INDENTURE BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER
JURISDICTION WOULD BE REQUIRED THEREBY. 
  
 8.
COUNTERPARTS. The parties may sign any number of copies of this Third Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 
  
 9. EFFECT OF
HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof. 
  
 10. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the
validity or sufficiency of this Third Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and NewMarket. 
  
 [Signature page follows] 
  

 4 

 IN WITNESS WHEREOF, the parties hereto have caused this Third Supplemental Indenture to be duly executed,
all as of the date first above written. 
  

			
	OLD TOWN LLC
		
	By:	 	 /s/ Bruce R. Hazelgrove, III

	Name:	 	Bruce R. Hazelgrove, III
	Title:	 	Manager
	
	NEWMARKET CORPORATION
		
	By:	 	 /s/ Thomas E. Gottwald

	Name:	 	Thomas E. Gottwald
	Title:	 	President and Chief Executive Officer
	
	 WELLS FARGO BANK, NATIONAL ASSOCIATION,
 as Trustee

		
	By:	 	 Joseph P. O’Donnell

		 	Authorized Signatory

  

 5

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