ALLIANT ENERGY CORP — Director's Dealing 2011

May 11, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ALLIANT ENERGY CORP (LNT)
CIK: 0000352541
Period of Report: 2011-05-11

Reporting Person: SCHMIDT JOEL J (Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-11	Common Stock	M	3931	$16.82	Acquired	10188.701	Direct
2011-05-11	Common Stock	S	3931	$40.75	Disposed	6257.701	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-11	Employee Stock Option (Right to Buy)	$16.82	M	3931	Disposed	2013-01-21	Common Stock (3931)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2161.7699	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Deferred Common Stock	$0		Common Stock (12807.9301)	12807.9301	Direct

Footnotes

F1: Reflects 401(k) holdings as of this filing date.

F2: Units are to be settled upon reporting person's retirement.