ALLIANT ENERGY CORP reports

Company Who this page is about. 1 identity field
Location
Madison, WI
SEC filing record 1 source field
Fiscal year end
31 December
ALLIANT ENERGY CORP has filed 3,107 SEC EDGAR filings since 07 Feb 1994

SEC filing history

Showing 1-25 of 1,000 matching filings.

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25
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1
SCHEDULE 13G File 005-44529

SCHEDULE 13G filing

Filing date
29 Apr 2026
Reporting date
Not listed
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SCHEDULE 13G File 005-44529

SCHEDULE 13G filing

Filing date
28 Apr 2026
Reporting date
Not listed
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4

FORM 4

Filing date
16 Apr 2026
Reporting date
15 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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4

FORM 4

Filing date
14 Apr 2026
Reporting date
10 Apr 2026
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ARS File 001-09894

ARS

Filing date
31 Mar 2026
Reporting date
31 Dec 2025
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DEFA14A File 001-09894

DEFA14A

Filing date
31 Mar 2026
Reporting date
Not listed
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DEF 14A File 001-09894

DEF 14A

Filing date
31 Mar 2026
Reporting date
20 May 2026
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SCHEDULE 13G/A File 005-44529

SCHEDULE 13G/A filing

Filing date
26 Mar 2026
Reporting date
Not listed
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4/A

FORM 4/A

Filing date
19 Mar 2026
Reporting date
19 Feb 2026
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3

FORM 3

Filing date
04 Mar 2026
Reporting date
23 Feb 2026
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4

FORM 4

Filing date
23 Feb 2026
Reporting date
19 Feb 2026
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4

FORM 4

Filing date
23 Feb 2026
Reporting date
19 Feb 2026
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4

FORM 4

Filing date
23 Feb 2026
Reporting date
19 Feb 2026
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