NORTHWESTERN CORP reports

Company location: Sioux Falls, SD
Fiscal year end: 31 December

NORTHWESTERN CORP has filed 3,022 SEC EDGAR filings since 14 Feb 1994

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SEC filing history

Showing 276-300 of 1,000 matching filings.

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25

Current page

12

8-K File 001-10499

8-K

Filing date: 23 Apr 2020
Reporting date: 22 Apr 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

10-Q File 001-10499

10-Q

Filing date: 23 Apr 2020
Reporting date: 31 Mar 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 001-10499

8-K

Filing date: 07 Apr 2020
Reporting date: 06 Apr 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

DEFA14A File 001-10499

DEFA14A 2020 VIRTUAL MEETING NOTICE

Filing date: 31 Mar 2020
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

DEFA14A File 001-10499

DEFA14A 2020 ANNUAL MTG NOTICE

Filing date: 06 Mar 2020
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

DEF 14A File 001-10499

DEF 14A 2020 PROXY STATEMENT

Filing date: 06 Mar 2020
Reporting date: 23 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 06 Mar 2020
Reporting date: 06 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-10499

8-K

Filing date: 03 Mar 2020
Reporting date: 03 Mar 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

FORM 4

Filing date: 27 Feb 2020
Reporting date: 27 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 26 Feb 2020
Reporting date: 26 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 25 Feb 2020
Reporting date: 21 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 25 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 24 Feb 2020
Reporting date: 24 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 19 Feb 2020
Reporting date: 18 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 19 Feb 2020
Reporting date: 18 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-10499

8-K

Filing date: 13 Feb 2020
Reporting date: 13 Feb 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

10-K File 001-10499

10-K

Filing date: 13 Feb 2020
Reporting date: 31 Dec 2019
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

SC 13G/A File 005-36015

SCHEDULE 13G/A

Filing date: 12 Feb 2020
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

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