Stock Trading History of Aardsma David A

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 Aardsma David A since year 2005. The trader's CIK number is 1315387. At the time of this reporting, Aardsma David A is the Sr. VP, Sales and Marketing of Waste Management Inc . (stock ticker symbol WMI). See this page for all insider trading activities at Waste Management Inc .

Stock purchases, sales, and option exercises reported by insider *Aardsma David A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-02-20	WMI	Waste Management Inc	Sale	618	33.42	20,653
2005-12-01	WMI	Waste Management Inc	Sale	820	30.50	25,010

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 Aardsma David A (Sr. VP, Sales and Marketing of Waste Management Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.