NORTHWESTERN CORP reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
Sioux Falls, SD
SEC filing record 1 source field available
Fiscal year end
31 December
NORTHWESTERN CORP has filed 3,022 SEC EDGAR filings since 14 Feb 1994

SEC filing history

Showing 1-14 of 14 matching filings.

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1
10-K File 001-10499

FORM 10-K 2018

Filing date
12 Feb 2019
Reporting date
31 Dec 2018
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10-K File 001-10499

FORM 10-K 2017

Filing date
13 Feb 2018
Reporting date
31 Dec 2017
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10-K File 001-10499

FORM 10-K 12.31.16

Filing date
17 Feb 2017
Reporting date
31 Dec 2016
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10-K File 001-10499

10-K NORTHWESTERN CORPORATION

Filing date
12 Feb 2015
Reporting date
31 Dec 2014
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10-K File 001-10499

FORM 10-K DECEMBER 31, 2013

Filing date
19 Feb 2014
Reporting date
31 Dec 2013
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10-K File 001-10499

NORTHWESTERN CORPORATION FORM 10-K

Filing date
16 Feb 2012
Reporting date
31 Dec 2011
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10-K File 001-10499

10-K filing

Filing date
11 Feb 2011
Reporting date
31 Dec 2010
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10-K File 001-10499

10-K 12/31/2009

Filing date
12 Feb 2010
Reporting date
11 Feb 2010
SEC evidence
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