Stabilization of "ESSO" Esso (Thailand) Public Company Limited (ESSO)'s IPO included an over-allotment of 84,583,300 shares, which were borrowed from ExxonMobil International Holding Inc.The shares were allocated to investors through an over-allotment agent, Phatra Securities Public Company Limited, which seeks to procure them through the SET to return to the lender under the following conditions: Stabilization Period : 6 May - 4 June 2008 Price Conditions: The purchasing price of the over-allotment must not be higher than any of the following: - the offering price (10 baht) or: - the highest bidding price or: - the last trading price at the time Sign Posting : The SET will post an "ST" sign on the security to inform investors of the stock's stabilization from 6 May - 4 June 2008. The procurement period may end before 4 June 2008 if the over-allotment agent can procure all of the over-allotted shares and/or exercise a greenshoe option to subscribe for shares from Esso (Thailand) Public Company Limited.