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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
1293644	C Duane Woods	1001 Fannin Street Suite 4000 Houston TX 77002	Senior Vice President	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
Common Stock	Acquisiton	2012-02-27	6,625	$19.61	92,175	No	4	M	Direct
Common Stock	Disposition	2012-02-27	4,461	$35.40	87,714	No	4	S	Direct
Common Stock	Disposition	2012-02-27	23,322	$35.42	64,392	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (Right to Buy)	Disposition	2012-02-27	6,625	$19.61	6,625	$19.61

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
11,375		2013-03-06	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	381	Indirect	By 401(k) Plan
Common Stock	125	Indirect	By children
Common Stock	185	Indirect	By Wife's IRA

Footnotes

Stock option granted pursuant to Waste Management, Inc. 2000 Stock Incentive Plan. The stock option originally vested in 25% annual increments commencing on the first anniversary of the date of the grant. The Compensation Committee of the Board of Directors accelerated the vesting of the Company's outstanding options effective December 28, 2005.
Shares sold to cover option cost and taxes.
This transaction was executed in multiple trades at prices ranging from $35.40 to $35.45. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the numer of shares and prices at which the transaction was effected.