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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
1128139	A Mark Weidman	1001 Fannin, Suite 4000 Houston TX 77002	President, Wheelabrator	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	2013-05-07	15,000	$33.49	20,599	No	4	M	Direct
Common Stock	Disposition	2013-05-07	13,208	$41.40	7,391	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	Stock Option (Right to Buy)	Disposition	2013-05-07	15,000	$33.49	15,000	$33.49

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
15,336	2011-03-09	2020-03-09	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	267	Indirect	By 401(k) Plan
Common Stock	38,386	Indirect	Mark & Anne Weidman Living Trust

Footnotes

This transaction was executed in multiple trades at prices ranging from $41.40 to $41.42. 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 number of shares and prices at which the transaction was effected.
Stock option granted pursuant to Waste Management, Inc. 2009 Stock Incentive Plan. The stock option vests 25% on the first and second anniversary of the date of grant with the remaining 50% on the third anniversary of the date of grant.