<SEC-DOCUMENT>0001193125-17-221264.txt : 20170703
<SEC-HEADER>0001193125-17-221264.hdr.sgml : 20170703
<ACCEPTANCE-DATETIME>20170703170755
ACCESSION NUMBER:		0001193125-17-221264
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20170630
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20170703
DATE AS OF CHANGE:		20170703

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEWMARKET CORP
		CENTRAL INDEX KEY:			0001282637
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1215

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32190
		FILM NUMBER:		17945807

	BUSINESS ADDRESS:	
		STREET 1:		330 S FOURTH ST
		STREET 2:		PO BOX 2189
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23218-2189
		BUSINESS PHONE:		804-788-5000

	MAIL ADDRESS:	
		STREET 1:		330 S FOURTH ST
		STREET 2:		PO BOX 2189
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23218-2189
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d417396d8k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML><HEAD>
<TITLE>Form 8-K</TITLE>
</HEAD>
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 <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>FORM <FONT
STYLE="white-space:nowrap">8-K</FONT> </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>CURRENT
REPORT </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>PURSUANT TO SECTION&nbsp;13 OR 15(d) </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>OF THE SECURITIES EXCHANGE ACT OF 1934 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Date of Report (Date of earliest event reported): June&nbsp;30, 2017 </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>NEWMARKET CORPORATION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Exact name of registrant as specified in its charter) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Commission
File <FONT STYLE="white-space:nowrap">No.&nbsp;1-32190</FONT> </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


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<TD VALIGN="top" ALIGN="center"><B>Virginia</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B><FONT STYLE="white-space:nowrap">20-0812170</FONT></B></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="top" ALIGN="center"><B>(State or other jurisdiction of incorporation)</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>(IRS Employer Identification No.)</B></TD></TR>
<TR STYLE="font-size:1pt">
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<TD HEIGHT="16" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" ALIGN="center"><B>330 South Fourth Street, Richmond, Virginia</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>23219</B></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="top" ALIGN="center"><B>(Address of principal executive offices)</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>(Zip Code)</B></TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Registrant&#146;s telephone number, including area code: (804)
<FONT STYLE="white-space:nowrap">788-5000</FONT> </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Check the appropriate box below
if the Form <FONT STYLE="white-space:nowrap">8-K</FONT> filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&#9744;</TD>
<TD ALIGN="left" VALIGN="top">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&#9744;</TD>
<TD ALIGN="left" VALIGN="top">Soliciting material pursuant to <FONT STYLE="white-space:nowrap">Rule&nbsp;14a-12</FONT> under the Exchange Act (17 CFR <FONT STYLE="white-space:nowrap">240.14a-12)</FONT> </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&#9744;</TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="white-space:nowrap">Pre-commencement</FONT> communications pursuant to Rule <FONT STYLE="white-space:nowrap">14d-2(b)</FONT> under the Exchange Act (17 CFR
<FONT STYLE="white-space:nowrap">240.14d-2(b))</FONT> </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&#9744;</TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="white-space:nowrap">Pre-commencement</FONT> communications pursuant to Rule <FONT STYLE="white-space:nowrap">13e-4(c)</FONT> under the Exchange Act (17 CFR
<FONT STYLE="white-space:nowrap">240.13e-4(c))</FONT> </TD></TR></TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant is an emerging growth
company as defined in Rule 405 of the Securities Act of 1933 (17 CFR &#167;230.405) or Rule <FONT STYLE="white-space:nowrap">12b-2</FONT> of the Securities Exchange Act of 1934 (17 CFR <FONT STYLE="white-space:nowrap">&#167;240.12b-2).</FONT> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Emerging growth company&nbsp;&nbsp;&#9744; </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">If an emerging
growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&nbsp;13(a) of the Exchange
Act.&nbsp;&nbsp;&#9744; </P> <P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>

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<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="12%" VALIGN="top" ALIGN="left"><B>Item&nbsp;8.01</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Other Events. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">As previously announced, on December&nbsp;16, 2016, Afton Chemical de M&eacute;xico, S.A.
de C.V., a <I>sociedad an&oacute;nima de capital</I> <I>variable </I>organized under the laws of the United Mexican States (&#147;Afton Mexico&#148;) and an indirect, wholly owned subsidiary of NewMarket Corporation (the &#147;Company&#148;),
entered into a Share Sale Agreement (the &#147;Agreement&#148;) to acquire approximately 99.5% of the outstanding capital stock (the &#147;Acquisition&#148;) of Aditivos Mexicanos, S.A. de C.V., a <I>sociedad an&oacute;nima de capital</I>
<I>variable</I> organized under the laws of the United Mexican States (&#147;AMSA&#148;). The Agreement was previously filed as Exhibit 2.1 to the Company&#146;s Current Report on Form <FONT STYLE="white-space:nowrap">8-K</FONT> filed on
December&nbsp;19, 2016. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">As of June&nbsp;30, 2017, the parties amended the Agreement to account for the election by an additional AMSA shareholder to
participate in the transaction, to revise certain ancillary agreements and to amend certain indemnification and working capital provisions to account for AMSA&#146;s adoption of a new private pension plan as well as the retirement of certain AMSA
executives. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On July&nbsp;3, 2017, the Company issued a press release announcing the closing of the Acquisition. A copy of this press release is attached
hereto as Exhibit 99.1 and incorporated herein by reference. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="12%" VALIGN="top" ALIGN="left"><B>Item&nbsp;9.01</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Financial Statements and Exhibits. </B></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(d)</TD>
<TD ALIGN="left" VALIGN="top">Exhibits. </TD></TR></TABLE> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="98%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


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<TD WIDTH="94%"></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&nbsp;&nbsp;2.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">First Amendment to Share Sale Agreement, dated as of June&nbsp;30, 2017, by and among Afton Chemical de M&eacute;xico, S.A. de C.V., Chevron Oronite Company LLC, the individual Local Sellers referred to therein, the Local
Sellers&#146; Representative referred to therein, Aditivos Mexicanos, S.A. de C.V., NewMarket Corporation, as Buyer Guarantor, and Afton Chemical Corporation*</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>99.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Press release dated July&nbsp;3, 2017</TD></TR>
</TABLE></DIV> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="2%" VALIGN="top" ALIGN="left">*</TD>
<TD ALIGN="left" VALIGN="top">Certain schedules and exhibits to this agreement have been omitted in accordance with Item 601(b)(2) of Regulation <FONT STYLE="white-space:nowrap">S-K.</FONT> A copy of any omitted schedules and/or exhibits will be
furnished to the Securities and Exchange Commission upon request. </TD></TR></TABLE>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SIGNATURE </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned
hereunto duly authorized. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Date: July&nbsp;3, 2017 </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
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<TD VALIGN="top" COLSPAN="3"><B>NEWMARKET CORPORATION</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
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<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Brian D. Paliotti</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Brian D. Paliotti</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Vice President and Chief Financial Officer</TD></TR>
</TABLE></DIV>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Exhibit Index </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
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<TR>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD WIDTH="92%"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP ALIGN="center"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; width:25.30pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Exhibit<BR>No.</B></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" NOWRAP ALIGN="center"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; width:39.50pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Description</B></P></TD></TR>


<TR STYLE="font-size:1pt">
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<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&nbsp;&nbsp;2.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">First Amendment to Share Sale Agreement, dated as of June&nbsp;30, 2017, by and among Afton Chemical de M&eacute;xico, S.A. de C.V., Chevron Oronite Company LLC, the individual Local Sellers referred to therein, the Local
Sellers&#146; Representative referred to therein, Aditivos Mexicanos, S.A. de C.V., NewMarket Corporation, as Buyer Guarantor, and Afton Chemical Corporation</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>99.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Press release dated July&nbsp;3, 2017</TD></TR>
</TABLE></DIV>
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<DOCUMENT>
<TYPE>EX-2.1
<SEQUENCE>2
<FILENAME>d417396dex21.htm
<DESCRIPTION>EX-2.1
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<HTML><HEAD>
<TITLE>EX-2.1</TITLE>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 2.1 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>FIRST AMENDMENT TO SHARE SALE AGREEMENT </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This <B>FIRST AMENDMENT TO SHARE SALE AGREEMENT</B> (&#147;<B>First Amendment</B>&#148;) dated as of June&nbsp;30, 2017 is made by and among
<B>CHEVRON ORONITE COMPANY LLC</B>, a Delaware limited liability company, with offices at 6001 Bollinger Canyon Road, San Ramon, California 94583 (&#147;<B>Oronite</B>&#148;), <B>LUIS</B> <B>AVELINO MOLINA MONTES</B>, an individual resident of
Mexico, individually and in his capacity as agent and <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">attorney-in-fact</FONT></FONT> (&#147;<B>Local Sellers&#146; Representative</B>&#148;) for and on behalf of each of the persons
other than Mr.&nbsp;Molina listed in <U>Annex A</U> attached hereto (Mr.&nbsp;Molina together with such other persons listed on <U>Annex A</U>, individually a &#147;<B>Local Seller</B>&#148; and collectively the &#147;<B>Local Sellers</B>&#148;, and
the Local Sellers together with Oronite, individually a &#147;<B>Seller</B>&#148; and collectively &#147;<B>Sellers</B>&#148;), under and in accordance with the Power of Attorney and Appointment of Local Sellers&#146; Representative set forth on
<U>Exhibit B</U> to the Agreement (as defined in the Recitals below), <B>AFTON CHEMICAL DE M&Eacute;XICO S.A. DE C.V.</B>, a <I>sociedad an&oacute;nima de capital</I> <I>variable </I>organized under the laws of the United Mexican States, with
offices at Av. Insurgentes Sur No.&nbsp;826, Piso 7, Col. Del Valle Centro, Ciudad de M&eacute;xico, C.P. 03100 M&eacute;xico (&#147;<B>Buyer</B>&#148;), <B>NEWMARKET CORPORATION</B>, a Virginia corporation with offices at 330 South Fourth Street,
Richmond, Virginia 23219 (&#147;<B>Buyer Guarantor</B>&#148;), <B>ADITIVOS MEXICANOS, S.A. DE C.V</B>, a <I>sociedad an&oacute;nima de capital</I> <I>variable</I> organized under the laws of the United Mexican States, with offices at Corporativo
MCS, Piso 14 Oficina 1401, Av. Miguel de Cervantes Saavedra 193, Col. Granada, 11520 M&eacute;xico City, M&eacute;xico (the &#147;<B>Company</B>&#148;), and <B>AFTON CHEMICAL CORPORATION</B>, a Delaware corporation, with offices at 500 Spring
Street, Richmond, Virginia 23219 (&#147;<B>Afton Chemical</B>&#148;). &#147;<B>Party</B>&#148; means the Company, Buyer, Buyer Guarantor, Oronite, each Local Seller (represented by the Local Sellers&#146; Representative) and Afton Chemical, and
&#147;<B>Parties</B>&#148; means two or more of any of them (as the context requires). Capitalized words used but not defined herein shall have the respective meanings assigned to such terms in the Agreement. </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>RECITALS </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%" VALIGN="top" ALIGN="left">A.</TD>
<TD ALIGN="left" VALIGN="top">The Parties hereto are also all of the Parties to that certain Share Sale Agreement, dated December&nbsp;16, 2016 (&#147;<B>Agreement</B>&#148;), pursuant to which, among other things, Sellers have agreed to sell to
Buyer, and Buyer has agreed to purchase from Sellers, the Shares owned by Sellers on the terms and conditions set out therein. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%" VALIGN="top" ALIGN="left">B.</TD>
<TD ALIGN="left" VALIGN="top">The Parties wish to amend the Agreement as provided herein. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%" VALIGN="top" ALIGN="left">C.</TD>
<TD ALIGN="left" VALIGN="top">Pursuant to <U>Section</U><U></U><U>&nbsp;18.3</U> of the Agreement, no amendment thereto shall be effective unless made in writing and signed by authorized representatives of all Parties. </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%" VALIGN="top" ALIGN="left">D.</TD>
<TD ALIGN="left" VALIGN="top">In consideration of the foregoing premises (which are incorporated and made part of this First Amendment by this reference) and the mutual promises set out herein, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Parties hereto, intending to be legally bound, agree as follows: </TD></TR></TABLE>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>AGREEMENT </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>1.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>AMENDMENTS </B></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.1</TD>
<TD ALIGN="left" VALIGN="top"><B>Modification of Recitals</B>. Recital &#147;A&#148; of the Agreement is hereby amended and restated to be and read in its entirety as follows: </TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:13%; font-size:10pt; font-family:Times New Roman">&#147;The Local Sellers collectively own 554,758 common shares of the Company&#146;s capital stock, and Oronite owns 379,436 common shares of
the Company&#146;s capital stock. Accordingly, Sellers collectively own </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">1 </P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:13%; font-size:10pt; font-family:Times New Roman">
934,194 common shares of the Company representing in excess of 99% of the issued and outstanding common shares of the Company&#146;s capital stock (the &#147;<B>Shares</B>&#148;).&#148; </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.2</TD>
<TD ALIGN="left" VALIGN="top"><B>Expanded and Amended List of Local Sellers</B>. The list of Local Sellers set out as <U>Exhibit A</U> to each of the Agreement, the Buyer Guaranty, the Local Sellers&#146; Escrow Agreement and the Purchase Price
Adjustment Escrow Agreement is hereby amended and restated to be and read in its entirety as set out in <U>Annex A</U><B> </B>attached hereto. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.3</TD>
<TD ALIGN="left" VALIGN="top"><B>Additional Power of Attorney and Appointment of Local Seller&#146;s Representative</B>. The Power of Attorney and Appointment of Local Seller&#146;s Representative in the form set out as <U>Exhibit B</U> to each of
the Agreement, the Buyer Guaranty, the Local Sellers&#146; Escrow Agreement and the Purchase Price Adjustment Escrow Agreement is hereby supplemented by including therein the additional Power of Attorney and Appointment set out in <U>Annex B</U><B>
</B>attached hereto. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.4</TD>
<TD ALIGN="left" VALIGN="top"><B>Modified Form of Amendment to Contract dated September</B><B></B><B>&nbsp;1, 2012</B>. The form of Amendment to Contract dated September&nbsp;1, 2012 in the form set out as <U>Exhibit F</U> to the Agreement is hereby
amended and restated to be and read in its entirety as set out in <U>Annex C</U><B> </B>attached hereto. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.5</TD>
<TD ALIGN="left" VALIGN="top"><B>Modified Form of Technology License Agreement</B>. The form of Technology License Agreement in the form set out as <U>Exhibit H</U> to the Agreement is hereby amended and restated to be and read in its entirety as
set out in <U>Annex D</U><B> </B>attached hereto. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.6</TD>
<TD ALIGN="left" VALIGN="top"><B>Modification of &#147;Local Sellers&#146; Trustee&#148;</B>. The definition of &#147;Local Sellers&#146; Trustee&#148; set forth in <U>Section</U><U></U><U>&nbsp;1.1(A)(80)</U> of the Agreement is hereby amended and
restated to be and read in its entirety as follows: </TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:13%; font-size:10pt; font-family:Times New Roman">&#147; &#147;<B>Local Sellers&#146; Trustee</B>&#148; means Banco
Invex, S.A., Instituci&oacute;n de Banca M&uacute;ltiple, Invex Grupo Financiero.&#148; </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.7</TD>
<TD ALIGN="left" VALIGN="top"><B>Modification of Currency Conversion Convention</B>. <U>Section</U><U></U><U>&nbsp;2.5(A)</U> of the Agreement is hereby amended and restated to be and read in its entirety as follows: </TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:13%; font-size:10pt; font-family:Times New Roman">&#147;All payments hereunder and all determinations of Losses and other amounts required or calculated pursuant to this Agreement, including
all calculations made pursuant to <U>Exhibit</U><U></U><U>&nbsp;C</U>, shall be denominated in U.S. Dollars, and if any amounts used to calculate any such payments or other determinations of amounts are denominated in MXN Pesos, such amounts shall
be converted to U.S. Dollars (rounded to two decimal places) using the average (rounded to four decimal places) currency exchange rate published by the Central Bank of Mexico (<I>Banco de M</I><I>&eacute;</I><I>xico</I>) in the Federal Official
Gazette (<I>Diario Oficial de la Federaci</I><I>&oacute;</I><I>n</I>) for the Business Days in the period beginning on May&nbsp;19, 2017 and ending on June&nbsp;21, 2017.&#148; </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.8</TD>
<TD ALIGN="left" VALIGN="top"><B>Clarification of Meaning of &#147;Oronite Indemnitees&#148;</B>. The words &#147;the Oronite Indemnitees&#148; in the proviso to <U>Section</U><U></U><U>&nbsp;11.4</U> of the Agreement are hereby amended and restated
to be and read &#147;Oronite and its Affiliates&#148;. </TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>


<p Style='page-break-before:always'>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.9</TD>
<TD ALIGN="left" VALIGN="top"><B>Special Payments to Luis Fernando Molina Casas</B>. Compliance with the Agreement (including <U>Section</U><U></U><U>&nbsp;4.1(I)</U> thereof) is hereby waived in respect of each of the following, it being understood
and agreed by all Parties that the execution and delivery or effectiveness of neither of the following shall be a Condition Precedent to any Party&#146;s obligations to sell and purchase the Shares pursuant to the Agreement: </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="8%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">(A)</TD>
<TD ALIGN="left" VALIGN="top">Any payments to Luis Fernando Molina Casas (&#147;<B>LFM</B>&#148;), Director General of the Company, pursuant to a proposed Confidentiality and <FONT STYLE="white-space:nowrap">Non-Compete</FONT> Agreement,
contemplated to be entered into prior to the Closing by and among the Company, Oronite, Afton Chemical, Buyer and LFM, in substantially the form set out in <U>Annex E</U> attached hereto (the &#147;<B>Confidentiality and <FONT
STYLE="white-space:nowrap">Non-Compete</FONT> Agreement</B>&#148;); and </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="8%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">(B)</TD>
<TD ALIGN="left" VALIGN="top">Any payments to LFM pursuant to a Shareholder Allocation Agreement, contemplated to be entered into prior to the Closing by and among Oronite, the Local Sellers&#146; Representative and LFM, in substantially the form
set out in <U>Annex&nbsp;F</U> attached hereto (the &#147;<B>Shareholder Agreement</B>&#148;). </TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:8%; font-size:10pt; font-family:Times New Roman">Buyer acknowledges and
agrees, for itself and all Buyer Indemnitees, that Sellers and their respective Affiliates shall have no liability whatsoever under <U>Section</U><U></U><U>&nbsp;11</U> of the Agreement for any Losses incurred or sustained by, or imposed upon, any
of the Buyer Indemnitees resulting from or attributable to the Confidentiality and <FONT STYLE="white-space:nowrap">Non-Compete</FONT> Agreement or any transactions or events contemplated thereby. </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:8%; font-size:10pt; font-family:Times New Roman">Sellers acknowledge and agree, for themselves and all Seller Indemnitees, that Buyer and its Affiliates shall have no liability whatsoever
under <U>Section</U><U></U><U>&nbsp;11</U> of the Agreement for any Losses incurred or sustained by, or imposed upon, any of the Seller Indemnitees resulting from or attributable to the Shareholder Agreement or any transactions or events
contemplated thereby. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1.10</TD>
<TD ALIGN="left" VALIGN="top"><B>Pension Plan Matters</B>. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="8%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">(A)</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">All Parties acknowledge that, effective as of February&nbsp;1, 2017, the Company adopted a new private pension
plan (the &#147;<B>Company</B><B>&#146;</B><B>s Pension Plan</B>&#148;) which is now operative allowing eligible participants to retire and qualify for benefits thereunder and replacing the Company&#146;s prior private pension plan (the
&#147;<B>2012 Pension Plan</B>&#148;). All Parties also acknowledge that each of LFM and Rafael Luis Su&aacute;rez S&aacute;nchez (&#147;<B>RLS</B>&#148;), Financial and Administrative Manager of the Company, has indicated that he will resign from
employment by the Company effective on or prior to June&nbsp;30, 2017 and retire under the Company&#146;s Pension Plan and elect at that time to receive a lump sum payment of pension benefits (rather than monthly payments of pension benefits) as
follows: (1)&nbsp;to LFM, 38,659,313 MXN Pesos due as part of the Defined Benefit (<I>Componente de Beneficio Definido</I>); and (2)&nbsp;to RLS, 10,413,177 MXN Pesos due as part of the Defined Benefit (<I>Componente de Beneficio Definido</I>) (with
respect to LFM and RLS, the amounts due as Defined Benefit (<I>Componente de Beneficio Definido</I>) together, the &#147;<B>Lump Sum Payments</B>&#148;). Buyer Guarantor and the other parties to the Buyer Guaranty hereby agree, for the benefit of
LFM and RLS, that the Buyer Guaranty shall cover and be applicable to any failure of the Company to make the Lump Sum Payments due to each of LFM and RLS pursuant to the terms and conditions of the Company&#146;s Pension Plan. LFM and RLS are
intended </P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">3 </P>


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<TR style = "page-break-inside:avoid">
<TD WIDTH="13%">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">
third party beneficiaries of this <U>Section</U><U></U><U>&nbsp;1.10(A)</U>. With respect to the Defined Contribution for Company Contributions (<I>Componente de Contribuci&oacute;n Definida por
las Aportaciones de la Empresa</I>) for each of LFM and RLS, the Company will distribute the applicable amounts in MXN Pesos (based on the documentation of the Company&#146;s Pension Plan) to LFM and RLS in a manner consistent with the
Company&#146;s Pension Plan and applicable Law. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="8%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">(B)</TD>
<TD ALIGN="left" VALIGN="top">In view of the foregoing: </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="13%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(1)</TD>
<TD ALIGN="left" VALIGN="top">Compliance with the Agreement (including <U>Section</U><U></U><U>&nbsp;4.1(I)</U> thereof) is hereby waived in respect of the adoption of the Company&#146;s Pension Plan, subject to the remaining provisions of this
<U>Section</U><U></U><U>&nbsp;1.10(B)</U>. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="13%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(2)</TD>
<TD ALIGN="left" VALIGN="top">The definition of &#147;Target Working Capital&#148; set forth in <U>Section</U><U></U><U>&nbsp;1.1(A)(122)</U> of the Agreement is hereby amended and restated to be and read in its entirety as follows:
</TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:17%; font-size:10pt; font-family:Times New Roman">&#147;&#147;<B>Target Working Capital</B>&#148; means the sum of: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="17%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(a)</TD>
<TD ALIGN="left" VALIGN="top">US$13,454,000 multiplied by a fraction the numerator of which is the total number of Shares held by all Sellers and the denominator is the total number of outstanding shares of capital stock of the Company as of the
Closing; <I><U>plus</U></I> </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="17%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(b)</TD>
<TD ALIGN="left" VALIGN="top">US$2,670,698.91 in respect of the resignations of LFM and RLS and their retirement under the Company&#146;s Pension Plan effective prior to Closing and their election at that time to receive the Lump Sum Payments.&#148;
</TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="13%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(3)</TD>
<TD ALIGN="left" VALIGN="top"><U>Section</U><U></U><U>&nbsp;11.2</U> of the Agreement is hereby amended by inserting the following text as new <U>Section</U><U></U><U>&nbsp;11.2(F)</U>: </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="17%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&#147;(F)</TD>
<TD ALIGN="left" VALIGN="top">any increase in the benefits payable under the Company&#146;s Pension Plan (exclusively as those terms are in effect as of the Closing) to any eligible plan participant who retires after the Closing, compared to the
benefits that would have been payable to that employee (based on the same retirement date) if the 2012 Pension Plan was still operative at the time of that employee&#146;s retirement and had not been replaced by the Company&#146;s Pension
Plan.&#148; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="13%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(4)</TD>
<TD ALIGN="left" VALIGN="top"><U>Exhibit C</U> to the Agreement (Working Capital, Closing Payment and Final Closing Payment Calculation Procedure) is hereby amended by: </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="17%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(a)</TD>
<TD ALIGN="left" VALIGN="top">inserting the following text as a new <U>Section</U><U></U><U>&nbsp;1.3(B)</U> thereto: </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="21%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">&#147;(B)</TD>
<TD ALIGN="left" VALIGN="top">exclude the effects of the Lump Sum Payments;&#148; </TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">4 </P>


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<TR style = "page-break-inside:avoid">
<TD WIDTH="17%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(b)</TD>
<TD ALIGN="left" VALIGN="top">renumbering the existing <U>Sections 1.3(B)</U>, <U>1.3(C)</U> and <U>1.3(D)</U> thereto as <U>Sections 1.3(C)</U>, <U>1.3(D)</U> and <U>1.3(E)</U>, respectively; and </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="17%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(c)</TD>
<TD ALIGN="left" VALIGN="top">amending the reference to &#147;<U>Section</U><U></U><U>&nbsp;1.3(A)</U>&#148; in renumbered <U>Section1.3(D)</U> to be and read as follows: </TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:21%; font-size:10pt; font-family:Times New Roman">&#147;<U>Sections 1.3(A)</U>, <U>1.3(B)</U> and <U>1.3(C)</U>&#148;. </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="8%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">(C)</TD>
<TD ALIGN="left" VALIGN="top">Except with respect to the indemnity obligations set forth in <U>Section</U><U></U><U>&nbsp;1.10(B)(3)</U> of this First Amendment and/or any indemnity obligations arising under <U>Section</U><U></U><U>&nbsp;11.2(A)</U>
of the Agreement, Sellers shall have no liability under <U>Section</U><U></U><U>&nbsp;11</U> of the Agreement for any Losses incurred or sustained by, or imposed upon, any of the Buyer Indemnitees resulting from or attributable to the adoption of
the Company&#146;s Pension Plan, the funding status of the Company&#146;s Pension Plan, the <FONT STYLE="white-space:nowrap">pre-Closing</FONT> retirement of either or both of LFM and RLS and either or both of such individual&#146;s election, with
the Company&#146;s approval, to receive a lump sum payment of pension benefits, or any post-Closing retirement by any Company employee. </TD></TR></TABLE> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>2.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>MISCELLANEOUS </B></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">2.1</TD>
<TD ALIGN="left" VALIGN="top"><B>Integration</B>. Except to the extent modified by this First Amendment, the Agreement shall continue in full force and effect, and the Agreement (including the Exhibits and Schedules thereto), as amended hereby
(including the Annexes hereto), comprises the complete and exclusive agreement between the Parties regarding the subject matter of this Agreement and this First Amendment, and supersedes all oral and written communications, negotiations,
representations or agreements in relation to that subject matter made or entered into before the Effective Date. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">2.2</TD>
<TD ALIGN="left" VALIGN="top"><B>Binding Effect</B>. This First Amendment, when executed by authorized representatives of all Parties, shall have been effected in accordance with <U>Section</U><U></U><U>&nbsp;18.3</U> of the Agreement and
accordingly shall be binding on each of the Parties. </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">2.3</TD>
<TD ALIGN="left" VALIGN="top"><B>Governing Law</B>. This First Amendment is governed by and interpreted under the laws of the State of Delaware, without regard to its choice of law rules. </TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">2.4</TD>
<TD ALIGN="left" VALIGN="top"><B>Counterparts</B>. This First Amendment may be executed in any number of counterparts, each of which will be deemed an original of this Agreement, and which together will constitute one and the same instrument;
<I>provided</I>, that no Party shall be bound to this First Amendment unless and until all Parties have executed a counterpart. Signatures delivered via facsimile or other electronic transmission (including PDF) shall be binding. </TD></TR></TABLE>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>The remainder of this page is intentionally left blank. </B></P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">5 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The Parties have executed this First Amendment as evidenced by the following signatures by the authorized
representatives of the Parties: </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>
<TD WIDTH="4%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="42%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="4%"></TD>
<TD VALIGN="bottom"></TD>
<TD WIDTH="4%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="42%"></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>CHEVRON ORONITE COMPANY LLC</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3"><B>AFTON CHEMICAL DE M&Eacute;XICO S.A. DE C.V.</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3">Signature:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3">Signature:</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Ian R. Daniel</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Robert A. Shama</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Ian R. Daniel</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Robert A. Shama</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">Attorney-In-Fact</FONT></FONT></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">Attorney-In-Fact</FONT></FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>LOCAL SELLERS&#146; REPRESENTATIVE,</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman"><B>individually and for and on behalf of each of the other Local Sellers</B></P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3"><B>NEWMARKET CORPORATION</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3">Signature:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3">Signature:</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Luis Avelino Molina Montes</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Brian D. Paliotti</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Luis Avelino Molina Montes</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Brian D. Paliotti</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Vice President&nbsp;&amp; Chief Financial Officer</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>ADITIVOS MEXICANOS, S.A. DE C.V.</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3"><B>AFTON CHEMICAL CORPORATION</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3">Signature:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3">Signature:</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Gabriel Perez Aguiar Arcco</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Robert A. Shama</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Gabriel Perez Aguiar Arcco</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Robert A. Shama</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">Attorney-In-Fact</FONT></FONT></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">President</TD></TR>
</TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">[<I>Signature Page to
First Amendment to Share Sale Agreement</I>] </P>

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<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>d417396dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
<HTML><HEAD>
<TITLE>EX-99.1</TITLE>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 99.1 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>AFTON CHEMICAL COMPLETES ACQUISITION OF ADITIVOS MEXICANOS, S.A. DE C.V. </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Richmond, VA, July&nbsp;3, 2017 &#150; Afton Chemical Corporation is pleased to announce the completion of its previously announced acquisition of Aditivos
Mexicanos, S.A. de C.V. (AMSA), a petroleum additives manufacturing, sales and distribution company based in Mexico City, Mexico. The transaction closed on July&nbsp;3, 2017, following the approval by the Mexican Federal Economic Competition
Commission (Comisi&oacute;n Federal de Competencia Econ&oacute;mica, COFECE). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&#147;We are excited to welcome the AMSA team into the Afton family. Adding
AMSA to Afton&#146;s global operations will help us bring new value added solutions to our customers worldwide,&#148; said Rob Shama, Afton Chemical&#146;s President. &#147;We plan to manufacture a complete range of petroleum additives for our
customers in Mexico and throughout Latin America. We will also supply our other blending locations with components from the AMSA site,&#148; said Shama. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The transition of AMSA into Afton will begin immediately. Customers in Mexico will shortly receive details explaining how the integration efforts will improve
the service they can expect from Afton. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The acquisition complements and expands Afton&#146;s current footprint in Latin America, which includes
subsidiaries in Brazil, Mexico, Argentina and Venezuela. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About Afton Chemical Corporation </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Afton Chemical Corporation is part of the NewMarket Corporation (NYSE: NEU) family of companies. Afton Chemical Corporation uses its formulation, engineering
and marketing expertise to help their customers develop and market fuels and lubricants that reduce emissions, improve fuel economy, extend equipment life, improve operator satisfaction and lower the total cost of vehicle and equipment operation.
Afton Chemical Corporation develops and sells an extensive line of unique additives for gasoline and distillate fuels, driveline fluids, engine oils and industrial lubricants. Afton Chemical Corporation supports global operations through regional
headquarters located in Asia Pacific, EMEAI, Latin America and North America. Afton Chemical Corporation is headquartered in Richmond, Virginia. For more information, visit www.aftonchemical.com. </P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Cautionary Note Regarding Forward-Looking Statements: </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Some of the information contained in this press release constitutes forward-looking statements within the meaning of the Private Securities Litigation Reform
Act of 1995. Although NewMarket&#146;s management believes its expectations are based on reasonable assumptions within the bounds of its knowledge of its business and operations, there can be no assurance that actual results will not differ
materially from expectations. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Factors that could cause actual results to differ materially from expectations include, but are not limited to, the
availability of raw materials and distribution systems; disruptions at manufacturing facilities, including single-sourced facilities; the ability to respond effectively to technological changes in our industry; failure to protect our intellectual
property rights; </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
failure to attract and retain a highly-qualified workforce; hazards common to chemical businesses; competition from other manufacturers; sudden or sharp raw material price increases; the gain or
loss of significant customers; the occurrence or threat of extraordinary events, including natural disasters and terrorist attacks; risks related to operating outside of the United States; the impact of fluctuations in foreign exchange rates; an
information technology system failure; political, economic, and regulatory factors concerning our products; future governmental regulation; resolution of environmental liabilities or legal proceedings; our inability to realize expected benefits from
investment in our infrastructure or from recent or future acquisitions or our inability to successfully integrate recent or future acquisitions into our business; and other factors detailed from time to time in the reports that NewMarket files with
the Securities and Exchange Commission, including the risk factors in Item 1A. &#147;Risk Factors&#148; of our 2016 Annual Report on Form <FONT STYLE="white-space:nowrap">10-K,</FONT> which is available to shareholders upon request. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">You should keep in mind that any forward-looking statement made by NewMarket in the foregoing discussion speaks only as of the date on which such
forward-looking statement is made. New risks and uncertainties come up from time to time, and it is impossible for us to predict these events or how they may affect the Company. We have no duty to, and do not intend to, update or revise the
forward-looking statements in this discussion after the date hereof, except as may be required by law. In light of these risks and uncertainties, you should keep in mind that the events described in any forward-looking statement made in this
discussion, or elsewhere, might not occur. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Media Contact: </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Lauren Packard, Marketing Communications </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Afton Chemical
Corporation </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Phone: (804) <FONT STYLE="white-space:nowrap">788-5800</FONT> </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>-END- </B></P>
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