INTERSTATE POWER & LIGHT CO SEC filing history

295 loaded recent SEC filings. No local filings are indexed for this CIK yet. This fallback shows up to 1,000 recent submissions, not the complete SEC archive.

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SEC filing history

Showing 1–25 of 81 matching filings.

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FWP File 333-276062-01

FWP

Filing date
18 Aug 2026
Reporting date
Not listed
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424B5 File 333-276062-01

424B5

Filing date
18 Aug 2026
Reporting date
Not listed
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POSASR File 333-276062-01

POSASR

Filing date
22 Sep 2025
Reporting date
Not listed
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FWP File 333-276062-01

FWP

Filing date
08 Sep 2025
Reporting date
Not listed
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424B5 File 333-276062-01

424B5

Filing date
08 Sep 2025
Reporting date
Not listed
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424B5 File 333-276062-01

424B5

Filing date
15 May 2025
Reporting date
Not listed
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FWP File 333-276062-01

FWP

Filing date
13 May 2025
Reporting date
Not listed
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424B5 File 333-276062-01

424B5

Filing date
13 May 2025
Reporting date
Not listed
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424B5 File 333-276062-01

424B5

Filing date
05 Sep 2024
Reporting date
Not listed
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FWP File 333-276062-01

FWP

Filing date
04 Sep 2024
Reporting date
Not listed
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424B5 File 333-276062-01

424B5

Filing date
04 Sep 2024
Reporting date
Not listed
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UPLOAD

UPLOAD filing

Filing date
19 Dec 2023
Reporting date
Not listed
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S-3ASR File 333-276062-01

S-3ASR

Filing date
15 Dec 2023
Reporting date
Not listed
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UPLOAD

UPLOAD filing

Filing date
28 Nov 2023
Reporting date
Not listed
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424B5 File 333-251353-01

424B5

Filing date
19 Sep 2023
Reporting date
Not listed
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FWP File 333-251353-01

FWP

Filing date
18 Sep 2023
Reporting date
Not listed
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424B5 File 333-251353-01

424B5

Filing date
18 Sep 2023
Reporting date
Not listed
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25-NSE File 001-04117

25-NSE filing

Filing date
15 Dec 2021
Reporting date
Not listed
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424B5 File 333-251353-01

424B5

Filing date
17 Nov 2021
Reporting date
Not listed
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FWP File 333-251353-01

FWP

Filing date
16 Nov 2021
Reporting date
Not listed
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424B5 File 333-251353-01

424B5

Filing date
16 Nov 2021
Reporting date
Not listed
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S-3ASR File 333-251353-01

S-3ASR

Filing date
15 Dec 2020
Reporting date
Not listed
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424B5 File 333-222076-02

424B5

Filing date
27 May 2020
Reporting date
Not listed
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