Recent filings by Alliant Energy Corporation

Published Title Summary
2026-08-21 08:45:22 8-K - ALLIANT ENERGY CORP (0000352541) (Filer)
Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits...

Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits
2026-07-31 11:22:47 10-Q - ALLIANT ENERGY CORP (0000352541) (Filer) Quarterly Report SEC-10-Q filed by Alliant Energy Corporation on 2026-07-31...
Quarterly Report SEC-10-Q filed by Alliant Energy Corporation on 2026-07-31 11:22:47-04:00
2026-07-30 18:02:45 8-K - ALLIANT ENERGY CORP (0000352541) (Filer)
Item 2.02: Results of Operations and Financial Condition
Item 9.01:...

Item 2.02: Results of Operations and Financial Condition
Item 9.01: Financial Statements and Exhibits
2026-05-21 17:05:15 8-K - ALLIANT ENERGY CORP (0000352541) (Filer)
Item 5.07: Submission of Matters to a Vote of Security...

Item 5.07: Submission of Matters to a Vote of Security Holders
2026-05-01 11:07:49 10-Q - ALLIANT ENERGY CORP (0000352541) (Filer) Quarterly Report SEC-10-Q filed by Alliant Energy Corporation on 2026-05-01...
Quarterly Report SEC-10-Q filed by Alliant Energy Corporation on 2026-05-01 11:07:49-04:00
2026-04-30 18:23:14 8-K - ALLIANT ENERGY CORP (0000352541) (Filer)
Item 2.02: Results of Operations and Financial Condition
Item 9.01:...

Item 2.02: Results of Operations and Financial Condition
Item 9.01: Financial Statements and Exhibits
2026-04-29 10:17:36 SCHEDULE 13G - ALLIANT ENERGY CORP (0000352541) (Subject) Passive 5% Ownership Report SEC-SCHEDULE 13G filed by Alliant Energy...
Passive 5% Ownership Report SEC-SCHEDULE 13G filed by Alliant Energy Corporation on 2026-04-29 10:17:36-04:00
2026-04-28 15:50:01 SCHEDULE 13G - ALLIANT ENERGY CORP (0000352541) (Subject) Passive 5% Ownership Report SEC-SCHEDULE 13G filed by Alliant Energy...
Passive 5% Ownership Report SEC-SCHEDULE 13G filed by Alliant Energy Corporation on 2026-04-28 15:50:01-04:00
2026-03-19 17:28:52 8-K - ALLIANT ENERGY CORP (0000352541) (Filer)
Item 1.01: Entry into a Material Definitive Agreement
Item 9.01:...

Item 1.01: Entry into a Material Definitive Agreement
Item 9.01: Financial Statements and Exhibits
2026-03-03 20:13:29 8-K - Current report Filed: 2026-03-04 AccNo: 0000352541-26-000009 Size: 1 MB
Item 1.01: Entry into...
Filed: 2026-03-04 AccNo: 0000352541-26-000009 Size: 1 MB
Item 1.01: Entry into a Material Definitive Agreement
Item 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
Item 9.01: Financial Statements and Exhibits
2026-02-23 19:15:36 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:15:36-05:00
2026-02-23 19:14:23 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:14:23-05:00
2026-02-23 19:13:37 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:13:37-05:00
2026-02-23 19:12:28 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:12:28-05:00
2026-02-23 19:10:50 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:10:50-05:00
2026-02-23 19:09:48 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:09:48-05:00
2026-02-23 19:08:53 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:08:53-05:00
2026-02-23 19:07:53 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-02-23 19:07:53-05:00
2026-02-20 14:58:00 10-K - Annual report [Section 13 and 15(d), not S-K Item 405] Annual Report SEC-10-K filed by Alliant Energy Corporation on 2026-02-20...
Annual Report SEC-10-K filed by Alliant Energy Corporation on 2026-02-20 14:58:00-05:00
2026-02-19 18:22:38 8-K - Current report Filed: 2026-02-20 AccNo: 0000352541-26-000005 Size: 1 MB
Item 2.02: Results of...
Filed: 2026-02-20 AccNo: 0000352541-26-000005 Size: 1 MB
Item 2.02: Results of Operations and Financial Condition
Item 9.01: Financial Statements and Exhibits
2026-01-12 14:38:06 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:38:06-05:00
2026-01-12 14:37:14 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:37:14-05:00
2026-01-12 14:36:36 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:36:36-05:00
2026-01-12 14:35:38 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:35:38-05:00
2026-01-12 14:33:43 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:33:43-05:00
2026-01-12 14:32:56 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:32:56-05:00
2026-01-12 14:32:09 4 - Statement of changes in beneficial ownership of securities Statement of changes in beneficial ownership of securities by insiders...
Statement of changes in beneficial ownership of securities by insiders SEC-4 filed by Alliant Energy Corporation on 2026-01-12 14:32:09-05:00
2026-01-08 16:15:54 8-K - Current report Filed: 2026-01-08 AccNo: 0000352541-26-000003 Size: 193 KB
Item 5.02: Departure of...
Filed: 2026-01-08 AccNo: 0000352541-26-000003 Size: 193 KB
Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
2025-12-16 16:20:36 8-K - Current report Filed: 2025-12-16 AccNo: 0000352541-25-000089 Size: 192 KB
Item 5.02: Departure of...
Filed: 2025-12-16 AccNo: 0000352541-25-000089 Size: 192 KB
Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
2025-12-04 21:45:54 8-K - Current report Filed: 2025-12-05 AccNo: 0000352541-25-000085 Size: 763 KB
Item 8.01: Other Events
Item...
Filed: 2025-12-05 AccNo: 0000352541-25-000085 Size: 763 KB
Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits