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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
929008	Wesco International Inc	WCC	Wholesale-Electrical Apparatus & Equipment, Wiring Supplies (5063)	251723345

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1379629	Richard Heyse	225 West Station Square Dr. Suite 700 Pittsburgh PA 15219-1122	Chief Financial Officer	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
Wesco International, Inc. Common Stock	Acquisiton	2010-05-11	9,250	$38.35	32,000	No	4	P	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Appreciation Rights	Acquisiton	2010-05-11	9,250	$0.00	9,250	$38.25

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
9,250		2010-05-11	No	4	A	Direct

Footnotes

This represents the weighted average price paid for the shares. The shares were purchased at prices ranging from $38.24 to $38.49. Mr. Heyse will provide, upon request of the SEC staff, WESCO International, Inc. or a shareholder of WESCO International, Inc., complete information regarding the number of shares purchased at each price within the range.
The Stock Appreciation Rights become exercisable in three (3) equal, annual installments beginning on the first anniversary of the date of grant.