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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
823768	Waste Management Inc	WM	Refuse Systems (4953)	731309529

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1315387	A David Aardsma	1001 Fannin Street Suite 4000 Houston TX 77002	Sr. Vp, Sales And Marketing	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-05-27	9,000	$19.25	47,668	No	4	M	Direct
Common Stock	Disposition	2010-05-27	6,706	$32.40	40,962	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Phantom Stock Units	Acquisiton	2010-05-27	6	$0.00	6	$0.00
Common Stock	Stock Option (Right to Buy)	Disposition	2010-05-27	9,000	$0.00	9,000	$19.25

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2,217	1988-08-08	1988-08-08	No	4	A	Direct
0		2010-06-05	No	4	M	Direct

Footnotes

Phantom stock units accrued under the Waste Management, Inc. 409A Deferral Savings Plan, a supplemental retirement savings plan. A phantom stock unit is equivalent to one share of Common Stock.
Participant's Company stock fund account on any given date may not exactly equal the number of share equivalents represented by a prior balance plus additions due to variables affecting the determination of Company stock fund unit values under the Plan on any such date.
Stock option granted pursuant to Waste Management, Inc. 1993 Stock Incentive Plan. The stock option originally vested in 25% annual increments commencing on the first anniversary of the date of grant. The Compensation committee of the Board of Directors accelerated the vesting of the Company's outstanding options effective December 28, 2005.