X0306 4 2012-08-15 0 0001282637 NEWMARKET CORP NEU 0001246521 HUANG C S WARREN 330 SOUTH FOURTH STREET RICHMOND VA 23219 0 1 0 0 President Afton Chemical Corp Common Stock 2012-08-15 4 A 0 410 0 A 2537 D Common Stock 1962.73 I NewMarket Savings Plan On August 15, 2012, the Compensation Committee of the Board of Directors of NewMarket Corporation (the "Company") approved stock awards to be granted on September 4, 2012 (the "Award Date") pursuant to the Company's 2004 Incentive Compensation and Stock Plan. The stock vests immediately on the Award Date and may not be sold or otherwise transferred until August 15, 2013. The increase in shares is due to periodic purchases by the Plan Trustee pursuant to the Plan. /s/ M. Rudolph West (POA for Warren Huang) 2012-08-17