No. Esso/SET/001/56 February 1, 2013 Subject: Resignation of Director and change of Executive of Esso (Thailand) Public Company Limited To: President The Stock Exchange of Thailand Esso (Thailand) Public Company Limited ("Esso") would like to notify the Stock Exchange of Thailand that Mr. Mark Ell Northcutt has resigned from the director position and ceased to be the Refinery Manager and Mr. Adisak Jankamolkulchai has become appointed Refinery Manager to replace Mr. Mark Ell Northcutt with effect from February 1, 2013. Please be informed accordingly. Yours truly, Esso (Thailand) Public Company Limited ....................................................................... (Mr. Mongkolnimit Auacherdkul) Director and Public and Government Affairs Manager ______________________________________________________________________ This announcement was prepared and disseminated by listed company or issuer through the electronic system which is provided for the purpose of dissemination of the information and related documents of listed company or issuer to the Stock Exchange of Thailand only. The Stock Exchange of Thailand has no responsibility for the correctness and completeness of any statements, figures, reports or opinions contained in this announcement, and has no liability for any losses and damages in any cases. In case you have any inquiries or clarification regarding this announcement, please directly contact listed company or issuer who made this announcement.