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Stock Trading History of Watterson David S

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 Watterson David S since year 2005. The trader's CIK number is 1269137. At the time of this reporting, Watterson David S is the VP and Chief Info. O of Martin Marietta Materials Inc (stock ticker symbol MLM).

Stock purchases, sales, and option exercises reported by *Watterson David S* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2006-08-04	MLM	Martin Marietta Materials Inc	Sale	5,500	84.44	464,413
2006-08-04	MLM	Martin Marietta Materials Inc	Option Exercise	5,500	45.79	251,845
2005-12-13	MLM	Martin Marietta Materials Inc	Sale	2,204	74.09	163,294
2005-06-02	MLM	Martin Marietta Materials Inc	Sale	672	62.50	42,000

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 Watterson David S (VP and Chief Info. O of Martin Marietta Materials Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.