NewMarket Corporation Schedules Conference Call and Webcast to Review Second Quarter 2006 Financial Results 

RICHMOND, Va.--July 13, 2006--NewMarket Corporation (NYSE: NEU) announced today it will release second quarter 2006 earnings at the close of business on Wednesday, July 26, 2006. The earnings announcement will also be available on the company's website at beginning Thursday, July 27, 2006. A conference call and Internet webcast is scheduled for 10:00 a.m. EDT on Thursday, July 27 to review second quarter 2006 financial results.

You can access the conference call live by dialing 877-407-8033 (domestic) or 201-689-8033 (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 or   A teleconference replay of the call will be available until August 1 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 208755. 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.

 David A. Fiorenza
 Investor Relations
 Phone: 804.788.5555
 Fax:  804.788.5688