NewMarket Corporation Schedules Conference Call And Webcast To Review First Quarter 2006 Financial Results 
4/5/2006 
Richmond, VA—April 5, 2006—NewMarket Corporation (NYSE: NEU) announced today it will release first quarter 2006 earnings at the close of business on Tuesday, April 25, 2006.  The earnings announcement will also be available on the company’s website at www.NewMarket.com beginning Wednesday, April 26, 2006.  A conference call and Internet webcast is scheduled for 10:00 a.m. EDT on Friday, April 28  to review first quarter 2006 financial results. 

You can access the conference call live by dialing 877-407-8031 (domestic) or 201-689-8031 (international) and requesting the NewMarket conference call.  To avoid delays, callers should dial in five minutes early.  The call will also be broadcast via the Internet and can be accessed through the Company’s website at www.NewMarket.com or www.investorcalendar.com.   A teleconference replay of the call will be available until May 3, 2006 at 11:59 p.m. EDT by dialing 877-660-6853 (domestic) and 201-612-7415 (international).  The account number is 286.  The conference ID number is 198933.  A webcast replay will be available for 30 days.

NewMarket Corporation through its subsidiaries, Afton Chemical Corporation and Ethyl Corporation, develops, manufactures, blends, and delivers chemical additives that enhance the performance of petroleum products. From custom-formulated chemical blends to market-general additive components, the NewMarket family of companies provides the world with the technology to make fuels burn cleaner, engines run smoother and machines last longer.


CONTACT: NewMarket Corporation, Richmond
  Investor Relations
  David A. Fiorenza, 804-788-5555
  Fax:  804-788-5688
  Email:  investorrelations@NewMarket.com