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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	2012-05-08	60,000	$17.10	172,569	No	4	M	Direct
Common Stock	Disposition	2012-05-08	30,000	$36.70	142,569	No	4	S	Direct
Common Stock	Disposition	2012-05-08	30,000	$36.71	112,569	No	4	S	Direct
Common Stock	Acquisiton	2012-05-09	90,000	$17.10	202,569	No	4	M	Direct
Common Stock	Disposition	2012-05-09	12,000	$36.72	190,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	10,000	$36.73	180,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	8,000	$36.74	172,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	24,500	$36.74	148,069	No	4	S	Direct
Common Stock	Disposition	2012-05-09	16,000	$36.75	132,069	No	4	S	Direct
Common Stock	Disposition	2012-05-09	7,500	$36.76	124,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	5,000	$36.77	119,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	1,000	$36.78	118,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	5,000	$36.79	113,569	No	4	S	Direct
Common Stock	Disposition	2012-05-09	500	$36.80	113,069	No	4	S	Direct
Common Stock	Disposition	2012-05-09	500	$36.81	112,569	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	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	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	2012-05-08	60,000	$0.00	60,000	$17.10
Common Stock	Stock Option (Right to buy)	Disposition	2012-05-09	90,000	$0.00	90,000	$17.10

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
325,000	2008-01-18	2015-01-18	No	4	M	Direct
235,000	2008-01-18	2015-01-18	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,864	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, 2012.