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as of 03-20-2026 3:40pm EST

$68.94
$2.38
-3.34%
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Alliant Energy is the parent of two regulated utilities, Interstate Power and Light and Wisconsin Power and Light. Together, IPL and WPL serve nearly 1 million electric customers and 425,000 natural gas-only customers. Both subsidiaries engage in the generation and distribution of electricity and the distribution and transportation of natural gas. Alliant also owns a 16% interest in American Transmission.

Founded: 1917 Country:
United States
United States
Employees: N/A City: MADISON
Market Cap: 18.7B IPO Year: 1999
Target Price: $73.67 AVG Volume (30 days): 2.3M
Analyst Decision: Buy Number of Analysts: 10
Dividend Yield:
3.00%
Dividend Payout Frequency: quarterly
EPS: 3.14 EPS Growth: 16.73
52 Week Low/High: $57.09 - $73.41 Next Earning Date: 05-07-2026
Revenue: $4,362,000,000 Revenue Growth: 9.57%
Revenue Growth (this year): 3.78% Revenue Growth (next year): 6.49%
P/E Ratio: 22.68 Index:
Free Cash Flow: -315000000.0 FCF Growth: N/A

AI-Powered LNT Daily Prediction

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AI Recommendation

hold
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73.94%
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Earnings Transcripts

SEC 8-K filings with transcript text

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2025
Q4

Q4 2025 Earnings

8-K SELL

Feb 20, 2026 · 100% conf.

AI Prediction SELL

1D

-1.38%

$70.03

Act: +1.27%

5D

-1.97%

$69.61

Act: +1.80%

20D

-0.84%

$70.41

Price: $71.01 Prob +5D: 0% AUC: 1.000
0000352541-26-000005

lnt-20260219000035254100000524850000107832false00003525412026-02-192026-02-190000352541lnt:IplMember2026-02-192026-02-190000352541lnt:WplMember2026-02-192026-02-19

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) February 19, 2026

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

INTERSTATE POWER & LIGHT COMPANY

(an Iowa corporation) Alliant Energy Tower Cedar Rapids, Iowa 52401 Telephone (319) 786-4411 Commission File Number - 1-4117 IRS Employer Identification Number - 42-0331370

WISCONSIN POWER & LIGHT COMPANY

(a Wisconsin corporation) 4902 N. Biltmore Lane Madison, Wisconsin 53718 Telephone (608) 458-3311 Commission File Number - 0-337 IRS Employer Identification Number - 39-0714890

(Former name or former address, if changed since last report.)

This combined Form 8-K is separately filed by Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company.

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). Alliant Energy Corporation - Emerging growth company ☐ Interstate Power and Light Company - Emerging growth company ☐ Wisconsin Power and Light Company - 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. Alliant Energy Corporation ☐ Interstate Power and Light Company ☐ Wisconsin Power and Light Company ☐

Item 2.02 Results of Operations and Financial Condition.

On February 19, 2026, Alliant Energy Corporation issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2025. A copy of such press release is furnished as Exhibit 99.1 and is incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits.

(a)Not applicable. (b)Not applicable. (c)Not applicable. (d)Exhibits. The following exhibits are being furnished herewith:

Exhibit NumberDescription (99.1)Alliant Energy Corporation press release dated February 19, 2026

(104)Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned hereunto duly authorized.

ALLIANT ENERGY CORPORATION

Date: February 19, 2026By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

INTERSTATE POWER AND LIGHT COMPANY

Date: February 19, 2026By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

WISCONSIN POWER AND LIGHT COMPANY

Date: February 19, 2026By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

2025
Q3

Q3 2025 Earnings

8-K

Nov 7, 2025

0000352541-25-000079

lnt-20251106000035254100000524850000107832false00003525412025-11-062025-11-060000352541lnt:IplMember2025-11-062025-11-060000352541lnt:WplMember2025-11-062025-11-06

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) November 6, 2025

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

INTERSTATE POWER & LIGHT COMPANY

(an Iowa corporation) Alliant Energy Tower Cedar Rapids, Iowa 52401 Telephone (319) 786-4411 Commission File Number - 1-4117 IRS Employer Identification Number - 42-0331370

WISCONSIN POWER & LIGHT COMPANY

(a Wisconsin corporation) 4902 N. Biltmore Lane Madison, Wisconsin 53718 Telephone (608) 458-3311 Commission File Number - 0-337 IRS Employer Identification Number - 39-0714890

(Former name or former address, if changed since last report.)

This combined Form 8-K is separately filed by Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company.

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). Alliant Energy Corporation - Emerging growth company ☐ Interstate Power and Light Company - Emerging growth company ☐ Wisconsin Power and Light Company - 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. Alliant Energy Corporation ☐ Interstate Power and Light Company ☐ Wisconsin Power and Light Company ☐

Item 2.02 Results of Operations and Financial Condition.

On November 6, 2025, Alliant Energy Corporation issued a press release announcing its financial results for the three and nine months ended September 30, 2025. A copy of such press release is furnished as Exhibit 99.1 and is incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits.

(a)Not applicable. (b)Not applicable. (c)Not applicable. (d)Exhibits. The following exhibits are being furnished herewith:

Exhibit NumberDescription (99.1)Alliant Energy Corporation press release dated November 6, 2025

(104)Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned hereunto duly authorized.

ALLIANT ENERGY CORPORATION

Date: November 6, 2025By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

INTERSTATE POWER AND LIGHT COMPANY

Date: November 6, 2025By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

WISCONSIN POWER AND LIGHT COMPANY

Date: November 6, 2025By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

2025
Q2

Q2 2025 Earnings

8-K

Aug 8, 2025

0000352541-25-000070

lnt-20250807000035254100000524850000107832false00003525412025-08-072025-08-070000352541lnt:IplMember2025-08-072025-08-070000352541lnt:WplMember2025-08-072025-08-07

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) August 7, 2025

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

INTERSTATE POWER & LIGHT COMPANY

(an Iowa corporation) Alliant Energy Tower Cedar Rapids, Iowa 52401 Telephone (319) 786-4411 Commission File Number - 1-4117 IRS Employer Identification Number - 42-0331370

WISCONSIN POWER & LIGHT COMPANY

(a Wisconsin corporation) 4902 N. Biltmore Lane Madison, Wisconsin 53718 Telephone (608) 458-3311 Commission File Number - 0-337 IRS Employer Identification Number - 39-0714890

(Former name or former address, if changed since last report.)

This combined Form 8-K is separately filed by Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company.

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). Alliant Energy Corporation - Emerging growth company ☐ Interstate Power and Light Company - Emerging growth company ☐ Wisconsin Power and Light Company - 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. Alliant Energy Corporation ☐ Interstate Power and Light Company ☐ Wisconsin Power and Light Company ☐

Item 2.02 Results of Operations and Financial Condition.

On August 7, 2025, Alliant Energy Corporation issued a press release announcing its financial results for the three and six months ended June 30, 2025. A copy of such press release is furnished as Exhibit 99.1 and is incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits.

(a)Not applicable. (b)Not applicable. (c)Not applicable. (d)Exhibits. The following exhibits are being furnished herewith:

Exhibit NumberDescription (99.1)Alliant Energy Corporation press release dated August 7, 2025

(104)Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned hereunto duly authorized.

ALLIANT ENERGY CORPORATION

Date: August 7, 2025By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

INTERSTATE POWER AND LIGHT COMPANY

Date: August 7, 2025By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

WISCONSIN POWER AND LIGHT COMPANY

Date: August 7, 2025By: /s/ Dylan M. Syse

Dylan M. Syse Chief Accounting Officer and Controller

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