INTERSTATE POWER & LIGHT CO reports

Company location: Cedar Rapids, IA
Fiscal year end: 31 December

INTERSTATE POWER & LIGHT CO has filed 510 SEC EDGAR filings since 07 Jan 1994

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SEC filing history

Showing 276-292 of 292 matching filings.

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424B5 File 333-159478

FINAL PROSPECTUS SUPPLEMENT

Filing date: 24 Aug 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 24 Aug 2010
Reporting date: 23 Aug 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

FWP File 333-159478

FREE WRITING PROSPECTUS

Filing date: 23 Aug 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

424B5 File 333-159478

PRELIMINARY PROSPECTUS SUPPLEMENT

Filing date: 23 Aug 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 13 Aug 2010
Reporting date: 13 Aug 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

10-Q File 001-04117

FORM 10-Q

Filing date: 05 Aug 2010
Reporting date: 30 Jun 2010
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

424B5 File 333-159478

FINAL PROSPECTUS SUPPLEMENT

Filing date: 11 Jun 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 11 Jun 2010
Reporting date: 10 Jun 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

FWP File 333-159478

FREE WRITING PROSPECTUS

Filing date: 10 Jun 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

424B5 File 333-159478

PRELIMINARY PROSPECTUS SUPPLEMENT

Filing date: 10 Jun 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 08 Jun 2010
Reporting date: 03 Jun 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 04 Jun 2010
Reporting date: 28 May 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 25 May 2010
Reporting date: 20 May 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

10-Q File 001-04117

FORM 10-Q

Filing date: 05 May 2010
Reporting date: 31 Mar 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

10-K File 001-04117

FORM 10-K 12/31/09

Filing date: 26 Feb 2010
Reporting date: 31 Dec 2009
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 16 Feb 2010
Reporting date: 10 Feb 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-04117

FORM 8-K

Filing date: 25 Jan 2010
Reporting date: 22 Jan 2010
SEC evidence: Open document Open filing
Next action: Verify source filing