Common Equity

3 Months Ended

Mar. 31, 2012

Common Equity

(6) COMMON EQUITY

Common Share Activity—A summary of Alliant Energy's common stock activity during the three months ended March 31, 2012 was as follows:

Shares outstanding, Jan. 1	111,018,821
Equity incentive plans (Note 5(b))	(5,116	)
Other (a)	(51,616	)
Shares outstanding, March 31	110,962,089

(a) Includes shares transferred from employees to Alliant Energy to satisfy tax withholding requirements in connection with the vesting of certain restricted stock under the equity incentive plans.

Dividend Restrictions—As of March 31, 2012, IPL's amount of retained earnings that were free of dividend restrictions was $323 million. As of March 31, 2012, WPL's amount of retained earnings that were free of dividend restrictions was $84 million for the remainder of 2012.

Restricted Net Assets of Subsidiaries—As of March 31, 2012, the amount of net assets of IPL and WPL that were not available to be transferred to their parent company, Alliant Energy, in the form of loans, advances or cash dividends without the consent of IPL's and WPL's regulatory authorities was $1.0 billion and $1.4 billion, respectively.

Capital Transactions with Subsidiaries—In the first quarter of 2012, IPL and WPL paid common stock dividends of $29.7 million and $28.1 million, respectively, to their parent company.

IPL [Member]

Common Equity

(6) COMMON EQUITY

Common Share Activity—A summary of Alliant Energy's common stock activity during the three months ended March 31, 2012 was as follows:

Shares outstanding, Jan. 1	111,018,821
Equity incentive plans (Note 5(b))	(5,116	)
Other (a)	(51,616	)
Shares outstanding, March 31	110,962,089

(a) Includes shares transferred from employees to Alliant Energy to satisfy tax withholding requirements in connection with the vesting of certain restricted stock under the equity incentive plans.

Dividend Restrictions—As of March 31, 2012, IPL's amount of retained earnings that were free of dividend restrictions was $323 million. As of March 31, 2012, WPL's amount of retained earnings that were free of dividend restrictions was $84 million for the remainder of 2012.

Restricted Net Assets of Subsidiaries—As of March 31, 2012, the amount of net assets of IPL and WPL that were not available to be transferred to their parent company, Alliant Energy, in the form of loans, advances or cash dividends without the consent of IPL's and WPL's regulatory authorities was $1.0 billion and $1.4 billion, respectively.

Capital Transactions with Subsidiaries—In the first quarter of 2012, IPL and WPL paid common stock dividends of $29.7 million and $28.1 million, respectively, to their parent company.

WPL [Member]

Common Equity

(6) COMMON EQUITY

Common Share Activity—A summary of Alliant Energy's common stock activity during the three months ended March 31, 2012 was as follows:

Shares outstanding, Jan. 1	111,018,821
Equity incentive plans (Note 5(b))	(5,116	)
Other (a)	(51,616	)
Shares outstanding, March 31	110,962,089

(a) Includes shares transferred from employees to Alliant Energy to satisfy tax withholding requirements in connection with the vesting of certain restricted stock under the equity incentive plans.

Dividend Restrictions—As of March 31, 2012, IPL's amount of retained earnings that were free of dividend restrictions was $323 million. As of March 31, 2012, WPL's amount of retained earnings that were free of dividend restrictions was $84 million for the remainder of 2012.

Restricted Net Assets of Subsidiaries—As of March 31, 2012, the amount of net assets of IPL and WPL that were not available to be transferred to their parent company, Alliant Energy, in the form of loans, advances or cash dividends without the consent of IPL's and WPL's regulatory authorities was $1.0 billion and $1.4 billion, respectively.

Capital Transactions with Subsidiaries—In the first quarter of 2012, IPL and WPL paid common stock dividends of $29.7 million and $28.1 million, respectively, to their parent company.