WASTE MANAGEMENT INC — Director's Dealing 2013

May 1, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WASTE MANAGEMENT INC (WM)
CIK: 0000823768
Period of Report: 2013-04-29

Reporting Person: Carpenter Don P (VP & Chief Acctg Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-04-29	Common Stock	M	18759.0000	$33.4900	Acquired	43997.4900	Direct
2013-04-29	Common Stock	M	13840.0000	$37.1850	Acquired	57837.4900	Direct
2013-04-29	Common Stock	M	2185.0000	$34.9350	Acquired	60022.4900	Direct
2013-04-29	Common Stock	S	1254.0000	$40.4200	Disposed	58768.4900	Direct
2013-04-29	Common Stock	S	32265.0000	$40.1543	Disposed	26503.4900	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-04-29	Stock Option (Right to Buy)	$33.4900	M	18759.0000	Disposed	2020-03-09	Common Stock (18759.0000)	Direct
2013-04-29	Stock Option (Right to Buy)	$37.1850	M	13840.0000	Disposed	2021-03-09	Common Stock (13840.0000)	Direct
2013-04-29	Stock Option (Right to Buy)	$34.9350	M	2185.0000	Disposed	2022-03-09	Common Stock (2185.0000)	Direct

Footnotes

F1: This transaction was executed in multiple trades at prices ranging from 40.15 to 40.22. 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.

F2: 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.