James H. Gallegos - Dec 31, 2021 Form 4 Insider Report for ALLIANT ENERGY CORP (LNT)

Role: EVP, Gen Cnsl and Corp Sec
Signature: /s/ Jake C. Blavat, Attorney-in-Fact
Stock symbol: LNT
Transactions as of: Dec 31, 2021
Transactions value $: $0
Form type: 4
Date filed: 1/4/2022, 08:58 AM
Next filing: Feb 22, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	LNT	Common Stock	Options Exercise	$0	+5.23K	+10.97%	$0.00	52.9K	Dec 31, 2021	Direct	F1, F2, F3
holding	LNT	Common Stock						1.54K	Dec 31, 2021	By 401(k) Plan	F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	LNT	Restricted Stock Units	Options Exercise	$0	-5.23K	-100%	$0.00^*	0	Dec 31, 2021	Common Stock	5.23K		Direct	F1, F2, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes dividend equivalent shares accrued during the vesting period.
F2	Each restricted stock unit (RSU) converts into one share of LNT common stock.
F3	Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.
F4	Reflects 401(k) holdings as of this filing date.
F5	The RSUs vested on December 31, 2021.