NewMarket Corporation Schedules Conference Call and Webcast to Review First Quarter 2009 Financial Results

RICHMOND, Va.--(Business Wire)--
NewMarket Corporation (NYSE:NEU) announced today it will release first quarter
2009 earnings at the close of business on Wednesday, April 22, 2009. The
earnings announcement will also be available on the company`s website at
www.NewMarket.com beginning Thursday, April 23, 2009. NewMarket`s annual meeting
will be held on Thursday, April 23. A conference call and Internet webcast is
scheduled for 10:00 a.m. EDT on Friday, April 24, to review first quarter 2009
financial results.

You can access the conference call live by dialing 1-877-407-8035 (domestic) or
1-201-689-8035 (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 April 29 at 11:59 p.m. EDT by dialing
1-877-660-6853 (domestic) and 1-201-612-7415 (international). The account number
is 286. The conference ID number is 318182. 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.

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

Copyright Business Wire 2009