NewMarket Corporation Declares Special Dividend

  NewMarket Corporation Declares Special Dividend

Business Wire

RICHMOND, Va. -- October 25, 2012

The Board of Directors of NewMarket Corporation (NYSE:NEU) declared a special
dividend in the amount of $25.00 per share on the common stock of the
Corporation. The dividend is payable on November 27, 2012 to NewMarket
shareholders of record at the close of business on November 7, 2012. NewMarket
will fund this payment of approximately $335 million by drawing on its
revolving credit facility.

Thomas E. Gottwald, CEO of NewMarket, stated, “This special dividend is
intended to reward our shareholders while retaining the financial capability
to meet opportunities as they arise, all while continuing our regular
dividend. We are generating significant amounts of cash, in excess of our
internal growth needs. After this action we will continue to have low debt
leverage. As we have stated previously, we will continue to deploy every means
available to increase shareholder value, through investing in our core
operations, seeking acquisitions, paying dividends and repurchasing stock. We
remain optimistic about our future and expect to continue to be able to
generate increased shareholder value.”

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.

Some of the information contained in this press release constitutes
forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995. Although NewMarket’s management believes its
expectations are based on reasonable assumptions within the bounds of its
knowledge of its business and operations, there can be no assurance that
actual results will not differ materially from expectations.

Factors that could cause actual results to differ materially from expectations
include, but are not limited to: availability of raw materials and
transportation systems; supply disruptions at single sourced facilities;
ability to respond effectively to technological changes in our industry;
failure to protect our intellectual property rights; hazards common to
chemical businesses; occurrence or threat of extraordinary events, including
natural disasters and terrorist attacks; competition from other manufacturers;
sudden or sharp raw materials price increases; gain or loss of significant
customers; risks related to operating outside of the United States; the impact
of fluctuations in foreign exchange rates; political, economic, and regulatory
factors concerning our products; future governmental regulation; resolution of
environmental liabilities or legal proceedings; inability to complete future
acquisitions or successfully integrate future acquisitions into our business
and other factors detailed from time to time in the reports that NewMarket
files with the Securities and Exchange Commission, including the risk factors
in Item 1A, “Risk Factors” of our 2011 Annual Report on Form 10-K, which is
available to shareholders upon request.

You should keep in mind that any forward-looking statement made by NewMarket
in the foregoing discussion speaks only as of the date on which such
forward-looking statement is made. New risks and uncertainties come up from
time to time, and it is impossible for us to predict these events or how they
may affect the company. We have no duty to, and do not intend to, update or
revise the forward-looking statements in this discussion after the date
hereof, except as may be required by law. In light of these risks and
uncertainties, you should keep in mind that the events described in any
forward-looking statement made in this discussion, or elsewhere, might not
occur.

Contact:

NewMarket Corporation
David A. Fiorenza
Investor Relations
804-788-5555
Fax: 804-788-5688