Clearing House Advisory Notices
To Clearing Member Firms
From CME Clearing
Subject CORPORATE EVENT: Diamond Offshore Drilling, Inc. (DO) Special Cash Distribution 10/31/07
Notice Date 2007-10-30
Notice Number 07-262
Effective Date 2007-10-31

Diamond Offshore Drilling, Inc. (DO) has announced a special cash distribution of $1.25 per DO Common Share. The record date is November 2, 2007 with a payable date of December 3, 2007. The New York Stock Exchange has set October 31, 2007 as the ex-distribution date. This corporate action will be coordinated with the Options Clearing Corporation.

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