Attached files

file filename
EXCEL - IDEA: XBRL DOCUMENT - NEWMARKET CORPFinancial_Report.xls
10-Q - FORM 10-Q - NEWMARKET CORPd10q.htm
EX-31.B - EXHIBIT 31.B - NEWMARKET CORPdex31b.htm
EX-31.A - EXHIBIT 31.A - NEWMARKET CORPdex31a.htm
EX-32.B - EXHIBIT 32.B - NEWMARKET CORPdex32b.htm

Exhibit 32(a)

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of NewMarket Corporation (the “Company”) for the period ending March 31, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas E. Gottwald, chief executive officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

By:  

/s/ Thomas E. Gottwald

Thomas E. Gottwald
President and Chief Executive Officer
April 29, 2011

 

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