ALLIANT ENERGY CORP — Director's Dealing 2011

Dec 8, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ALLIANT ENERGY CORP (LNT)
CIK: 0000352541
Period of Report: 2011-12-07

Reporting Person: ALLER THOMAS L (Senior Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-12-07	Common Stock	M	2700	$16.82	Acquired	15528.343	Direct
2011-12-07	Common Stock	S	2700	$43.0033	Disposed	12828.343	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-12-07	Employee Stock Option (Right to Buy)	$16.82	M	2700	Disposed	2013-01-21	Common Stock (2700)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4821.402	Indirect
Common Stock	1000	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Deferred Common Stock	$0		Common Stock (8844.1552)	8844.1552	Direct

Footnotes

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

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