Washington, D.C. 20549
Form 8-K
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):  09/13/2011
NewMarket Corporation
(Exact name of registrant as specified in its charter)
Commission File Number:  1-32190
(State or other jurisdiction of
(IRS Employer
Identification No.)
330 South Fourth Street, Richmond, VA 23219
(Address of principal executive offices, including zip code)
(Registrant’s telephone number, including area code)
Not applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[  ]   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[  ]   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[  ]   Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[  ]   Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01.    Other Events
Settlement of Innospec Inc. litigation:

As previously disclosed by NewMarket Corporation (the "Company"), the Company and its subsidiary Afton Chemical Corporation (collectively, "NewMarket"), brought two civil actions against Innospec Inc. and its subsidiaries Alcor Chemie Vertriebs GmbH and Innospec Ltd. (collectively, "Innospec").

NewMarket and Innospec have agreed to settle these actions pursuant to the terms of a settlement agreement between them signed on September 13, 2011 which provides for mutual releases of the parties and dismissal of the actions with prejudice. Under the settlement agreement, Innospec will pay NewMarket an aggregate amount of approximately $45 million, payable in a combination of cash, promissory note and stock of which $25 million is payable in cash by September 20, 2011, $15 million is payable in three equal annual installments under the promissory note (carrying simple interest at 1% per annum) the first installment of which is due on September 10, 2012, and approximately $5 million is payable in the form of 195,313 shares of Innospec Inc. common stock by September 20, 2011.



Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
NewMarket Corporation
Date: September 14, 2011
/s/    David A. Fiorenza

David A. Fiorenza
Vice President and Treasurer