Attached files

file filename
10-Q - FORM 10-Q - NEWMARKET CORPd10q.htm
EX-4.1 - EXHIBIT 4.1 - NEWMARKET CORPdex41.htm
EX-31.A - EXHIBIT 31A - NEWMARKET CORPdex31a.htm
EX-31.B - EXHIBIT 31B - NEWMARKET CORPdex31b.htm
EX-32.B - EXHIBIT 32B - 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, 2010 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 28, 2010