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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
783325	Wisconsin Energy Corp	WEC	Electric & Other Services Combined (4931)	391391525

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1195320	E Gale Klappa	231 West Michigan Street Milwaukee, WI 53203	Chairman, President, And Ceo	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
Common Stock	Acquisiton	2010-05-11	50,000	$25.31	95,304	No	4	M	Direct
Common Stock	Disposition	2010-05-11	25,000	$52.15	70,304	No	4	S	Direct
Common Stock	Disposition	2010-05-11	200	$52.07	70,104	No	4	S	Direct
Common Stock	Disposition	2010-05-11	500	$52.06	69,604	No	4	S	Direct
Common Stock	Disposition	2010-05-11	24,300	$52.05	45,304	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
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	2010-05-11	50,000	$0.00	50,000	$25.31

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
200,000	2004-12-31	2013-04-14	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	1,348	Indirect	ERSP

Footnotes

Includes shares acquired pursuant to a dividend reinvestment feature of Wisconsin Energy Corporation's Stock Plus Investment Plan in transactions exempt from Section 16 pursuant to Rule 16a-11.
Includes shares acquired under Wisconsin Energy Corporation's Employee Retirement Savings Plan (ERSP) in transactions exempt from Section 16(b) pursuant to Rule 16b-3(c) and exempt from reporting pursuant to Rule 16a-3(f)(1)(i)(B). The number of shares in the ERSP attributable to any one participant varies with the price of the Common Stock. The information in this report is based on a plan statement dated as of April 30, 2010.
By action of the Compensation Committee on December 28, 2004, all options granted to employees of the Issuer, including the reporting person, in 2002, 2003 and 2004, and not otherwise exercisable, became exercisable as of December 31, 2004.