Sincerely,

Thomas E. Gottwald

The year 2011 results include a net gain on a legal settlement. All periods included in this earnings release include the expense or income on an interest rate swap related to financing on Foundry Park resulting from the Company valuing the swap agreement at fair value at the end of each reporting period. The Company is reporting net income including these items, as well as income excluding them, and related per share amounts in the Summary of Earnings included in the earnings release. The Company has also included the non-GAAP financial measure EBITDA in this earnings release. A schedule following the financial statements included in this earnings release is provided reflecting the calculation of EBITDA, defined as Net income, before the deduction of interest and financing expenses, income taxes, depreciation and amortization. EBITDA is shown on the schedule both including and excluding the benefit of the legal settlement and the impact of valuing the swap agreement. The Company believes that even though these items are not required by or presented in accordance with United States generally accepted accounting principles (GAAP), these additional measures enhance understanding of the Company’s performance and period to period comparability. The Company believes that these items should not be considered an alternative to net income determined under GAAP.

As a reminder, a conference call and Internet webcast is scheduled for 10:00 a.m. EST on Thursday, February 2, 2012, to review fourth quarter and year 2011 financial results. You can access the conference call live by dialing 1-877-407-9210 (domestic) or 1-201-689-8049 (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 February 9, 2012 at 11:59 p.m. EST by dialing 1-877-660-6853 (domestic) and 1-201-612-7415 (international). The account number is 286. The conference ID number is 386662. 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.

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