Common Equity (Tables)

3 Months Ended

Mar. 31, 2025

A summary of Alliant Energy’s common stock activity was as follows:


Shares outstanding, January 1, 2025			256,690,222


Shareowner Direct Plan			99,700
Equity-based compensation plans			86,377

Shares outstanding, March 31, 2025			256,876,299

A summary of changes in shareowners’ equity was as follows (in millions):



Alliant Energy				Accumulated	Shares in
		Additional		Other	Deferred	Total
	Common	Paid-In	Retained	Comprehensive	Compensation	Common
	Stock	Capital	Earnings	Income (Loss)	Trust	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$3	$3,060	$3,954	$1	($14)	$7,004
Net income attributable to Alliant Energy common shareowners			213			213
Common stock dividends ($0.5075 per share)			(130)			(130)
Shareowner Direct Plan issuances		6				6
Equity-based compensation plans and other					1	1



Other comprehensive loss, net of tax				(1)		(1)
Ending balance, March 31, 2025	$3	$3,066	$4,037	$—	($13)	$7,093
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$3	$3,030	$3,756	$1	($13)	$6,777
Net income attributable to Alliant Energy common shareowners			158			158
Common stock dividends ($0.48 per share)			(123)			(123)
Shareowner Direct Plan issuances		6				6
Equity-based compensation plans and other		(3)			1	(2)



Other comprehensive income, net of tax				1		1
Ending balance, March 31, 2024	$3	$3,033	$3,791	$2	($12)	$6,817



IPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$33	$3,212	$1,216	$4,461
Net income			110	110
Common stock dividends			(89)	(89)
Capital contributions from parent		45		45
Ending balance, March 31, 2025	$33	$3,257	$1,237	$4,527
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$33	$2,887	$1,054	$3,974
Net income			63	63
Common stock dividends			(50)	(50)
Capital contributions from parent		50		50
Ending balance, March 31, 2024	$33	$2,937	$1,067	$4,037



WPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$66	$2,533	$1,502	$4,101
Net income			110	110
Common stock dividends			(75)	(75)




Ending balance, March 31, 2025	$66	$2,533	$1,537	$4,136
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$66	$2,478	$1,353	$3,897
Net income			92	92
Common stock dividends			(49)	(49)
Capital contributions from parent		55		55



Ending balance, March 31, 2024	$66	$2,533	$1,396	$3,995

A summary of changes in shareowners’ equity was as follows (in millions):



Alliant Energy				Accumulated	Shares in
		Additional		Other	Deferred	Total
	Common	Paid-In	Retained	Comprehensive	Compensation	Common
	Stock	Capital	Earnings	Income (Loss)	Trust	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$3	$3,060	$3,954	$1	($14)	$7,004
Net income attributable to Alliant Energy common shareowners			213			213
Common stock dividends ($0.5075 per share)			(130)			(130)
Shareowner Direct Plan issuances		6				6
Equity-based compensation plans and other					1	1



Other comprehensive loss, net of tax				(1)		(1)
Ending balance, March 31, 2025	$3	$3,066	$4,037	$—	($13)	$7,093
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$3	$3,030	$3,756	$1	($13)	$6,777
Net income attributable to Alliant Energy common shareowners			158			158
Common stock dividends ($0.48 per share)			(123)			(123)
Shareowner Direct Plan issuances		6				6
Equity-based compensation plans and other		(3)			1	(2)



Other comprehensive income, net of tax				1		1
Ending balance, March 31, 2024	$3	$3,033	$3,791	$2	($12)	$6,817



IPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$33	$3,212	$1,216	$4,461
Net income			110	110
Common stock dividends			(89)	(89)
Capital contributions from parent		45		45
Ending balance, March 31, 2025	$33	$3,257	$1,237	$4,527
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$33	$2,887	$1,054	$3,974
Net income			63	63
Common stock dividends			(50)	(50)
Capital contributions from parent		50		50
Ending balance, March 31, 2024	$33	$2,937	$1,067	$4,037



WPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$66	$2,533	$1,502	$4,101
Net income			110	110
Common stock dividends			(75)	(75)




Ending balance, March 31, 2025	$66	$2,533	$1,537	$4,136
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$66	$2,478	$1,353	$3,897
Net income			92	92
Common stock dividends			(49)	(49)
Capital contributions from parent		55		55



Ending balance, March 31, 2024	$66	$2,533	$1,396	$3,995

A summary of changes in shareowners’ equity was as follows (in millions):



Alliant Energy				Accumulated	Shares in
		Additional		Other	Deferred	Total
	Common	Paid-In	Retained	Comprehensive	Compensation	Common
	Stock	Capital	Earnings	Income (Loss)	Trust	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$3	$3,060	$3,954	$1	($14)	$7,004
Net income attributable to Alliant Energy common shareowners			213			213
Common stock dividends ($0.5075 per share)			(130)			(130)
Shareowner Direct Plan issuances		6				6
Equity-based compensation plans and other					1	1



Other comprehensive loss, net of tax				(1)		(1)
Ending balance, March 31, 2025	$3	$3,066	$4,037	$—	($13)	$7,093
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$3	$3,030	$3,756	$1	($13)	$6,777
Net income attributable to Alliant Energy common shareowners			158			158
Common stock dividends ($0.48 per share)			(123)			(123)
Shareowner Direct Plan issuances		6				6
Equity-based compensation plans and other		(3)			1	(2)



Other comprehensive income, net of tax				1		1
Ending balance, March 31, 2024	$3	$3,033	$3,791	$2	($12)	$6,817



IPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$33	$3,212	$1,216	$4,461
Net income			110	110
Common stock dividends			(89)	(89)
Capital contributions from parent		45		45
Ending balance, March 31, 2025	$33	$3,257	$1,237	$4,527
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$33	$2,887	$1,054	$3,974
Net income			63	63
Common stock dividends			(50)	(50)
Capital contributions from parent		50		50
Ending balance, March 31, 2024	$33	$2,937	$1,067	$4,037



WPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
Three Months Ended March 31, 2025
Beginning balance, December 31, 2024	$66	$2,533	$1,502	$4,101
Net income			110	110
Common stock dividends			(75)	(75)




Ending balance, March 31, 2025	$66	$2,533	$1,537	$4,136
Three Months Ended March 31, 2024
Beginning balance, December 31, 2023	$66	$2,478	$1,353	$3,897
Net income			92	92
Common stock dividends			(49)	(49)
Capital contributions from parent		55		55



Ending balance, March 31, 2024	$66	$2,533	$1,396	$3,995