Stephanie Cox - 09 Jan 2026 Form 4 Insider Report for ALLIANT ENERGY CORP (LNT)

Role: Director
Signature: /s/ Jake C. Blavat, Attorney-in-Fact
Issuer symbol: LNT
Transactions as of: 09 Jan 2026
Net transactions value: +$40,000
Form type: 4
Filing time: 12 Jan 2026, 14:36:36 UTC
Previous filing: 14 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cox Stephanie	Director	C/O ALLIANT ENERGY CORPORATION, 4902 N. BILTMORE LANE, MADISON	/s/ Jake C. Blavat, Attorney-in-Fact	12 Jan 2026	0001463371

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	Deferred Common Stock Units	Award	$40,000	+615	+3.9%	$65.02	16,581	09 Jan 2026	Common Stock	615	$0.000000	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Units are to be settled in shares of common stock upon the reporting person's termination of services as a director.
F2	Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.