UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): May 17, 2024

Name of Registrant, State of Incorporation, Address of Principal Executive Offices, Telephone Number, Commission File Number, IRS Employer Identification Number

ALLIANT ENERGY CORPORATION

(a Wisconsin corporation)

4902 N. Biltmore Lane

Madison, Wisconsin 53718

Telephone (608) 458-3311

Commission File Number - 1-9894

IRS Employer Identification Number - 39-1380265

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Alliant Energy Corporation, Common Stock, $0.01 Par Value, Trading Symbol LNT, Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07    Submission of Matters to a Vote of Security Holders.

The final results of voting on each of the matters submitted to a vote of shareowners during the annual meeting of shareowners of Alliant Energy Corporation (“AEC”) on May 17, 2024 are as follows.

1.Election of directors. Each nominee for director was elected by the following vote:

	For	Against	Abstain	Broker Non-Votes
For a term ending in 2025
Christie Raymond	197,132,914	1,594,042	391,000	25,109,598
For a term ending in 2026
Ignacio Cortina	197,175,001	1,508,179	434,776	25,109,598
For a term ending in 2027
Lisa Barton	196,796,663	1,961,940	359,353	25,109,598
Stephanie Cox	194,190,395	4,511,369	416,192	25,109,598
Roger Newport	194,337,700	4,352,861	427,395	25,109,598
Carol Sanders	183,111,713	15,607,363	398,880	25,109,598

2.Approve, on an advisory, non-binding basis, the compensation of our named executive officers. This matter was approved by the following vote:

For	Against	Abstain	Broker Non-Votes
189,645,167	8,498,044	974,745	25,109,598

3.Ratify the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for 2024. This matter was approved by the following vote:

For	Against	Abstain
218,456,446	5,337,649	433,459

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Alliant Energy Corporation has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

ALLIANT ENERGY CORPORATION

Date: May 20, 2024	By:/s/ Omar N. Chaudhary
	Omar N. Chaudhary
	Corporate Secretary