Stock Trading History of Long William C

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Long William C since year 2005. The trader's CIK number is 1249089. At the time of this reporting, Long William C is the Senior VP, General Counsel of Diamond Offshore Drilling Inc (stock ticker symbol DO).

Stock purchases, sales, and option exercises reported by *Long William C* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-05-21	DO	Diamond Offshore Drilling Inc	Sale	3,564	94.75	337,689
2007-05-18	DO	Diamond Offshore Drilling Inc	Sale	312	94.75	29,562
2007-05-21	DO	Diamond Offshore Drilling Inc	Option Exercise	3,876	35.87	139,022
2007-02-09	DO	Diamond Offshore Drilling Inc	Option Exercise	1,372	57.66	79,112
2007-02-09	DO	Diamond Offshore Drilling Inc	Sale	1,372	84.72	116,237
2007-02-09	DO	Diamond Offshore Drilling Inc	Option Exercise	3,752	25.01	93,831
2007-02-09	DO	Diamond Offshore Drilling Inc	Sale	3,752	84.72	317,874

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Long William C (Senior VP, General Counsel of Diamond Offshore Drilling Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.