Shareholders of KeySpan Corporation (KSE) voted on Thursday, August 17, 2006, and approved a proposed Merger between KSE and National Grid US8 Inc., a wholly owned subsidiary of National Grid plc (NGG). KSE became a wholly owned subsidiary of NGG with the consummation of the merger on August 24, 2007. As a result, each share of KSE Common Stock will be converted into the right to receive $42.00 cash per share.  On August 27, 2007, all KSE1C futures were adjusted to deliver $4,200 ($42.00 x 100 shares).  The maturity date for all KSE1C futures will be accelerated to Wednesday, September 5, 2007. This corporate action will be coordinated with the Options Clearing Corporation.

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