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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1057058	Waste Connections Inc.	WCN	Refuse Systems (4953)	943283464

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1064299	J Ronald Mittelstaedt	2295 Iron Point Road Suite 200 Folsom CA 95630	Chief Executive Officer	Yes	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	2010-05-18	28,000	$22.01	156,198	No	4	M	Direct
Common Stock	Disposition	2010-05-18	28,000	$35.52	128,198	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	Employee Stock Option (Right to Buy)	Disposition	2010-05-18	28,000	$0.00	28,000	$22.01

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
38,057	2006-02-23	2015-02-23	No	4	M	Direct

Footnotes

The zero in Table II, Column 8 is a placeholder only that is required by the EDGAR software and should be disregarded.
This option was originially reported as an option for 91,971 shares of common stock at an exercise price of $33.02 per share, but was adjusted to reflect WCI's 3-for-2 stock splits in the form of 50% stock dividends effective June 24, 2004, and March 13, 2007. Accordingly, on March 13, 2007, the option became exercisable for 137,957 shares at an exercise price of $22.01 per share.