On June 25, 2010, Shareholders of XTO Energy Inc. (XTO) voted concerning the proposed merger with
Exxon Mobil Corporation (XOM). The merger was approved and consummated. As a result, each existing
XTO Common Share will be converted into the right to receive .7098 XOM Common Shares. Cash will be
paid in lieu of fractional XOM shares.
This action will be coordinated with the Options Clearing Corporation.
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