NORTHWESTERN CORP SEC EDGAR Filings (CIK 0000073088)

SEC EDGAR filings, ownership reports, and insider transactions for NORTHWESTERN CORP.

Industry
Electric & Other Services Combined (Office Of Energy & Transportation)
Business address
3010 W 69 Th Street, Sioux Falls, SD, 57108
State of incorporation
DE
Fiscal year end
31 December
Former names
NORTHWESTERN PUBLIC SERVICE CO (to 20 Apr 1998)
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NORTHWESTERN CORP has filed 3,022 SEC EDGAR filings since 14 Feb 1994

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 13 Feb 2024 005-36015
SC 13G/A Open Document Open Filing 22 Jan 2024 005-36015
15-12G Open Document Open Filing 15-12G 07 Dec 2023 001-10499
8-K Open Document | Data Open Filing 8-K 06 Dec 2023 06 Dec 2023 001-10499
8-K Open Document | Data Open Filing 8-K 05 Dec 2023 29 Nov 2023 001-10499
8-K Open Document | Data Open Filing 8-K 13 Nov 2023 12 Nov 2023 001-10499
8-K Open Document | Data Open Filing 8-K 27 Oct 2023 26 Oct 2023 001-10499
10-Q Open Document | Data Open Filing 10-Q 27 Oct 2023 30 Sep 2023 001-10499
POSASR Open Document Open Filing POSASR 02 Oct 2023 333-253047
POSASR Open Document Open Filing POSASR 02 Oct 2023 333-257950
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-175813
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-149388
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-124624
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-122428
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 033-56401
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-11843
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-18991
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-80819
S-8 POS Open Document Open Filing S-8 POS 02 Oct 2023 333-80817
8-K Open Document | Data Open Filing 8-K 02 Oct 2023 02 Oct 2023 001-10499
25-NSE Open Document Open Filing 29 Sep 2023 001-10499
8-K Open Document | Data Open Filing 8-K 13 Sep 2023 13 Sep 2023 001-10499
8-K Open Document | Data Open Filing 8-K 25 Jul 2023 24 Jul 2023 001-10499
10-Q Open Document | Data Open Filing 10-Q 25 Jul 2023 30 Jun 2023 001-10499
8-K Open Document | Data Open Filing 8-K 06 Jul 2023 29 Jun 2023 001-10499
3 Open Document Open Filing FORM 3 16 Jun 2023 16 Jun 2023
8-K Open Document | Data Open Filing 8-K 15 Jun 2023 15 Jun 2023 001-10499
424B3 Open Document Open Filing SUPPLEMENT TO PROSPECTUS SUPPLEMENT 15 Jun 2023 333-253047
8-K Open Document | Data Open Filing 8-K 09 Jun 2023 05 Jun 2023 001-10499
8-K Open Document | Data Open Filing 8-K 08 Jun 2023 08 Jun 2023 001-10499
8-K Open Document | Data Open Filing 8-K 07 Jun 2023 01 Jun 2023 001-10499
8-K Open Document | Data Open Filing 8-K 19 May 2023 19 May 2023 001-10499
4 Open Document Open Filing FORM 4 17 May 2023 16 May 2023
144 Open Document Open Filing 16 May 2023 001-10499
4 Open Document Open Filing FORM 4 11 May 2023 09 May 2023
8-K Open Document | Data Open Filing 8-K 05 May 2023 01 May 2023 001-10499
8-K Open Document | Data Open Filing 8-K 03 May 2023 28 Apr 2023 001-10499
3 Open Document Open Filing FORM 3 01 May 2023 28 Apr 2023
8-K Open Document | Data Open Filing 8-K 28 Apr 2023 27 Apr 2023 001-10499
10-Q Open Document | Data Open Filing 10-Q 28 Apr 2023 31 Mar 2023 001-10499
8-K Open Document | Data Open Filing 8-K 05 Apr 2023 03 Apr 2023 001-10499
8-K Open Document | Data Open Filing 8-K 05 Apr 2023 30 Mar 2023 001-10499
8-K Open Document | Data Open Filing 8-K 15 Mar 2023 15 Mar 2023 001-10499
ARS Open Document Open Filing ARS 14 Mar 2023 14 Mar 2023 001-10499
DEFA14A Open Document Open Filing DEFA14A 14 Mar 2023 001-10499
DEF 14A Open Document | Data Open Filing DEF 14A 14 Mar 2023 001-10499
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
4 Open Document Open Filing FORM 4 09 Mar 2023 07 Mar 2023
SC 13G/A Open Document Open Filing 08 Mar 2023 005-36015
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 03 Mar 2023
4 Open Document Open Filing FORM 4 07 Mar 2023 06 Mar 2023
8-K Open Document | Data Open Filing 8-K 27 Feb 2023 27 Feb 2023 001-10499
4 Open Document Open Filing FORM 4 23 Feb 2023 23 Feb 2023
8-K Open Document | Data Open Filing 8-K 23 Feb 2023 17 Feb 2023 001-10499
8-K Open Document | Data Open Filing 8-K 17 Feb 2023 16 Feb 2023 001-10499
10-K Open Document | Data Open Filing 10-K 17 Feb 2023 31 Dec 2022 001-10499
SC 13G/A Open Document Open Filing 14 Feb 2023 005-36015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 09 Feb 2023 005-36015
SC 13G/A Open Document Open Filing SC 13G/A 08 Feb 2023 005-36015
4 Open Document Open Filing FORM 4 03 Feb 2023 02 Feb 2023
4 Open Document Open Filing FORM 4 03 Feb 2023 02 Feb 2023
SC 13G/A Open Document Open Filing 23 Jan 2023 005-36015
8-K Open Document | Data Open Filing 8-K 17 Jan 2023 16 Jan 2023 001-10499
4 Open Document Open Filing FORM 4 06 Jan 2023 06 Jan 2023
4 Open Document Open Filing FORM 4 06 Jan 2023 06 Jan 2023
4 Open Document Open Filing FORM 4 06 Jan 2023 06 Jan 2023
4 Open Document Open Filing FORM 4 06 Jan 2023 06 Jan 2023
4 Open Document Open Filing FORM 4 06 Jan 2023 06 Jan 2023
4 Open Document Open Filing FORM 4 06 Jan 2023 06 Jan 2023
8-K Open Document | Data Open Filing 8-K 05 Jan 2023 21 Dec 2022 001-10499
3 Open Document Open Filing FORM 3 03 Jan 2023 03 Jan 2023
3 Open Document Open Filing FORM 3 03 Jan 2023 03 Jan 2023
8-K Open Document | Data Open Filing 8-K 19 Dec 2022 13 Dec 2022 001-10499
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
4 Open Document Open Filing FORM 4 15 Dec 2022 13 Dec 2022
8-K Open Document | Data Open Filing 8-K 07 Dec 2022 07 Dec 2022 001-10499
8-K Open Document | Data Open Filing 8-K 01 Dec 2022 28 Nov 2022 001-10499
4 Open Document Open Filing FORM 4 14 Nov 2022 14 Nov 2022
8-K Open Document | Data Open Filing 8-K 14 Nov 2022 14 Nov 2022 001-10499
4 Open Document Open Filing FORM 4 04 Nov 2022 03 Nov 2022
8-K Open Document | Data Open Filing 8-K 03 Nov 2022 28 Oct 2022 001-10499
4 Open Document Open Filing FORM 4 28 Oct 2022 28 Oct 2022
8-K Open Document | Data Open Filing 8-K 25 Oct 2022 24 Oct 2022 001-10499
10-Q Open Document | Data Open Filing 10-Q 25 Oct 2022 30 Sep 2022 001-10499
8-K Open Document | Data Open Filing 8-K 22 Sep 2022 21 Sep 2022 001-10499
8-K Open Document | Data Open Filing 8-K 22 Sep 2022 22 Sep 2022 001-10499
4 Open Document Open Filing FORM 4 15 Sep 2022 15 Sep 2022
3 Open Document Open Filing FORM 3 07 Sep 2022 31 Aug 2022
8-K Open Document | Data Open Filing 8-K 31 Aug 2022 31 Aug 2022 001-10499
4 Open Document Open Filing FORM 4 09 Aug 2022 09 Aug 2022
8-K Open Document | Data Open Filing 8-K 09 Aug 2022 08 Aug 2022 001-10499
3 Open Document Open Filing FORM 3 04 Aug 2022 28 Jul 2022
8-K Open Document | Data Open Filing 8-K 01 Aug 2022 28 Jul 2022 001-10499
8-K Open Document | Data Open Filing 8-K 28 Jul 2022 27 Jul 2022 001-10499
8-K Open Document | Data Open Filing 8-K 28 Jul 2022 27 Jul 2022 001-10499
10-Q Open Document | Data Open Filing 10-Q 28 Jul 2022 30 Jun 2022 001-10499
8-K Open Document | Data Open Filing 8-K PARTIAL FORWARD SETTLEMENT JUNE 2022 28 Jun 2022 24 Jun 2022 001-10499
4 Open Document Open Filing FORM 4 15 Jun 2022 15 Jun 2022
8-K Open Document | Data Open Filing 8-K 23 May 2022 18 May 2022 001-10499
8-K Open Document | Data Open Filing 8-K 17 May 2022 17 May 2022 001-10499
8-K Open Document | Data Open Filing 8-K 05 May 2022 29 Apr 2022 001-10499
8-K Open Document | Data Open Filing 8-K 29 Apr 2022 28 Apr 2022 001-10499
10-Q Open Document | Data Open Filing 10-Q 29 Apr 2022 31 Mar 2022 001-10499
8-K Open Document | Data Open Filing 8-K 17 Mar 2022 17 Mar 2022 001-10499
4 Open Document Open Filing FORM 4 07 Mar 2022 07 Mar 2022
DEFA14A Open Document Open Filing DEFA14A 2022 ANNUAL MTG NOTICE 07 Mar 2022 001-10499
DEF 14A Open Document Open Filing DEF 14A 07 Mar 2022 29 Apr 2022 001-10499
8-K Open Document | Data Open Filing 8-K 03 Mar 2022 03 Mar 2022 001-10499
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
4 Open Document Open Filing FORM 4 02 Mar 2022 28 Feb 2022
8-K Open Document | Data Open Filing 8-K 02 Mar 2022 02 Mar 2022 001-10499
4 Open Document Open Filing FORM 4 28 Feb 2022 25 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 25 Feb 2022 24 Feb 2022
4 Open Document Open Filing FORM 4 23 Feb 2022 23 Feb 2022
8-K Open Document | Data Open Filing 8-K 16 Feb 2022 10 Feb 2022 001-10499
4 Open Document Open Filing FORM 4 15 Feb 2022 15 Feb 2022
SC 13G Open Document Open Filing 14 Feb 2022 005-36015
8-K Open Document | Data Open Filing 8-K 14 Feb 2022 10 Feb 2022 001-10499
S-8 Open Document Open Filing S-8 14 Feb 2022 333-262705
10-K Open Document | Data Open Filing 10-K 11 Feb 2022 31 Dec 2021 001-10499
SC 13G Open Document Open Filing 10 Feb 2022 005-36015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 09 Feb 2022 005-36015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2022 005-36015
4 Open Document Open Filing FORM 4 02 Feb 2022 01 Feb 2022
4 Open Document Open Filing FORM 4 02 Feb 2022 01 Feb 2022
4 Open Document Open Filing FORM 4 02 Feb 2022 01 Feb 2022
4 Open Document Open Filing FORM 4 02 Feb 2022 01 Feb 2022
SC 13G/A Open Document Open Filing 27 Jan 2022 005-36015
SC 13G Open Document Open Filing 25 Jan 2022 005-36015
UPLOAD Open Document Open Filing 10 Jan 2022
4 Open Document Open Filing FORM 4 05 Jan 2022 03 Jan 2022
4 Open Document Open Filing FORM 4 05 Jan 2022 03 Jan 2022
4 Open Document Open Filing FORM 4 05 Jan 2022 03 Jan 2022
4 Open Document Open Filing FORM 4 05 Jan 2022 03 Jan 2022
CORRESP Open Document Open Filing 30 Dec 2021
8-K Open Document | Data Open Filing 8-K 20 Dec 2021 14 Dec 2021 001-10499
4 Open Document Open Filing FORM 4 16 Dec 2021 15 Dec 2021
UPLOAD Open Document Open Filing 15 Dec 2021
8-K Open Document | Data Open Filing 8-K 08 Dec 2021 08 Dec 2021 001-10499
SC 13G/A Open Document Open Filing FILING NORTHWESTERN CORP 07 Dec 2021 005-36015
8-K Open Document | Data Open Filing 8-K 19 Nov 2021 15 Nov 2021 001-10499
424B2 Open Document Open Filing 424B5 18 Nov 2021 333-253047
424B5 Open Document Open Filing 424B5 15 Nov 2021 333-253047
8-K Open Document | Data Open Filing 8-K 08 Nov 2021 08 Nov 2021 001-10499
8-K Open Document | Data Open Filing 8-K 25 Oct 2021 24 Oct 2021 001-10499
10-Q Open Document | Data Open Filing 10-Q 25 Oct 2021 30 Sep 2021 001-10499
8-K Open Document | Data Open Filing 8-K 22 Sep 2021 22 Sep 2021 001-10499
4 Open Document Open Filing FORM 4 16 Sep 2021 15 Sep 2021
8-K Open Document | Data Open Filing 8-K 09 Sep 2021 09 Sep 2021 001-10499
4 Open Document Open Filing FORM 4 25 Aug 2021 23 Aug 2021
4 Open Document Open Filing FORM 4 06 Aug 2021 05 Aug 2021
8-K Open Document | Data Open Filing 8-K 28 Jul 2021 27 Jul 2021 001-10499
10-Q Open Document | Data Open Filing 10-Q 28 Jul 2021 30 Jun 2021 001-10499
S-3ASR Open Document Open Filing S-3ASR 16 Jul 2021 333-257950
4 Open Document Open Filing FORM 4 22 Jun 2021 22 Jun 2021
8-K Open Document | Data Open Filing 8-K 16 Jun 2021 16 Jun 2021 001-10499
4 Open Document Open Filing FORM 4 14 May 2021 14 May 2021
8-K Open Document | Data Open Filing 8-K 13 May 2021 13 May 2021 001-10499
4 Open Document Open Filing FORM 4 29 Apr 2021 29 Apr 2021
8-K Open Document | Data Open Filing 8-K 28 Apr 2021 28 Apr 2021 001-10499
8-K Open Document | Data Open Filing 8-K ANNUAL MEETING VOTING RESULTS 2021 27 Apr 2021 22 Apr 2021 001-10499
4 Open Document Open Filing FORM 4 27 Apr 2021 26 Apr 2021
8-K Open Document | Data Open Filing FORM 8-K 23 Apr 2021 23 Apr 2021 001-10499
424B5 Open Document Open Filing 424B5 23 Apr 2021 333-253047
8-K Open Document | Data Open Filing 8-K 22 Apr 2021 21 Apr 2021 001-10499
10-Q Open Document | Data Open Filing 10-Q 22 Apr 2021 31 Mar 2021 001-10499
8-K Open Document | Data Open Filing 8-K 01 Apr 2021 26 Mar 2021 001-10499
424B5 Open Document Open Filing 424B5 22 Mar 2021 333-253047
FWP Open Document Open Filing FWP 19 Mar 2021 333-253047
424B5 Open Document Open Filing 424B5 19 Mar 2021 333-253047
8-K Open Document | Data Open Filing 8-K 15 Mar 2021 15 Mar 2021 001-10499
4 Open Document Open Filing FORM 4 05 Mar 2021 05 Mar 2021
DEFA14A Open Document Open Filing DEFA14A 05 Mar 2021 001-10499
DEF 14A Open Document Open Filing DEF 14A 05 Mar 2021 22 Apr 2021 001-10499
4 Open Document Open Filing FORM 4 02 Mar 2021 01 Mar 2021
4 Open Document Open Filing FORM 4 02 Mar 2021 01 Mar 2021
4 Open Document Open Filing FORM 4 02 Mar 2021 01 Mar 2021
8-K Open Document | Data Open Filing 8-K 01 Mar 2021 01 Mar 2021 001-10499
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
4 Open Document Open Filing FORM 4 26 Feb 2021 24 Feb 2021
3 Open Document Open Filing FORM 3 24 Feb 2021 15 Feb 2021
3 Open Document Open Filing FORM 3 24 Feb 2021 15 Feb 2021
8-K Open Document | Data Open Filing 8-K 17 Feb 2021 11 Feb 2021 001-10499
S-3ASR Open Document Open Filing S-3ASR 2021 12 Feb 2021 333-253047
8-K Open Document | Data Open Filing 8-K 12 Feb 2021 11 Feb 2021 001-10499
10-K Open Document | Data Open Filing 10-K 12 Feb 2021 31 Dec 2020 001-10499
SC 13G Open Document Open Filing SC 13G 11 Feb 2021 005-36015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 10 Feb 2021 005-36015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 10 Feb 2021 005-36015
8-K Open Document | Data Open Filing 8-K 10 Feb 2021 05 Feb 2021 001-10499
4 Open Document Open Filing FORM 4 02 Feb 2021 01 Feb 2021
4 Open Document Open Filing FORM 4 02 Feb 2021 01 Feb 2021
4 Open Document Open Filing FORM 4 02 Feb 2021 01 Feb 2021
4 Open Document Open Filing FORM 4 02 Feb 2021 01 Feb 2021
4 Open Document Open Filing FORM 4 02 Feb 2021 01 Feb 2021
SC 13G/A Open Document Open Filing 26 Jan 2021 005-36015
SC 13G Open Document Open Filing FILING NORTHWESTERN CORP 15 Jan 2021 005-36015
4 Open Document Open Filing FORM 4 05 Jan 2021 04 Jan 2021
4 Open Document Open Filing FORM 4 05 Jan 2021 04 Jan 2021
4 Open Document Open Filing FORM 4 05 Jan 2021 04 Jan 2021
4 Open Document Open Filing FORM 4 05 Jan 2021 04 Jan 2021
8-K Open Document | Data Open Filing 8-K 30 Dec 2020 22 Dec 2020 001-10499
4 Open Document Open Filing FORM 4 16 Dec 2020 15 Dec 2020
8-K Open Document | Data Open Filing 8-K 07 Dec 2020 07 Dec 2020 001-10499
8-K Open Document | Data Open Filing 8-K 01 Dec 2020 01 Dec 2020 001-10499
8-K Open Document | Data Open Filing 8-K 09 Nov 2020 09 Nov 2020 001-10499
8-K Open Document | Data Open Filing 8-K COLSTRIP TERMINATION 30 Oct 2020 29 Oct 2020 001-10499
8-K Open Document | Data Open Filing 8-K 27 Oct 2020 27 Oct 2020 001-10499
8-K Open Document | Data Open Filing 8-K EARNINGS RELEASE Q3 2020 22 Oct 2020 21 Oct 2020 001-10499
10-Q Open Document | Data Open Filing 10-Q 22 Oct 2020 30 Sep 2020 001-10499
4 Open Document Open Filing FORM 4 16 Oct 2020 15 Oct 2020
CERT Open Document Open Filing 30 Sep 2020 001-31229-01
25 Open Document Open Filing 25 30 Sep 2020 001-31229-01
8-A12B Open Document Open Filing 8-A12B 30 Sep 2020 001-10499
8-K Open Document | Data Open Filing 8-K 24 Sep 2020 24 Sep 2020 001-10499
8-K Open Document | Data Open Filing 8-K 18 Sep 2020 18 Sep 2020 001-10499
8-K Open Document | Data Open Filing 8-K 10 Sep 2020 10 Sep 2020 001-10499
8-K Open Document | Data Open Filing 8-K 04 Sep 2020 02 Sep 2020 001-10499
4 Open Document Open Filing FORM 4 03 Sep 2020 03 Sep 2020
4 Open Document Open Filing FORM 4 02 Sep 2020 02 Sep 2020
4 Open Document Open Filing FORM 4 18 Aug 2020 17 Aug 2020
8-K Open Document | Data Open Filing 8-K 12 Aug 2020 12 Aug 2020 001-10499
4 Open Document Open Filing FORM 4 07 Aug 2020 06 Aug 2020
8-K Open Document | Data Open Filing 8-K 29 Jul 2020 28 Jul 2020 001-10499
10-Q Open Document | Data Open Filing 10-Q 29 Jul 2020 30 Jun 2020 001-10499
8-K Open Document | Data Open Filing 8-K 16 Jun 2020 16 Jun 2020 001-10499
8-K Open Document | Data Open Filing 8-K 20 May 2020 15 May 2020 001-10499
8-K Open Document | Data Open Filing 8-K 14 May 2020 14 May 2020 001-10499
4 Open Document Open Filing FORM 4 08 May 2020 06 May 2020
4 Open Document Open Filing FORM 4 07 May 2020 06 May 2020
8-K Open Document | Data Open Filing 8-K 29 Apr 2020 23 Apr 2020 001-10499
8-K Open Document | Data Open Filing 8-K 23 Apr 2020 22 Apr 2020 001-10499
10-Q Open Document | Data Open Filing 10-Q 23 Apr 2020 31 Mar 2020 001-10499
8-K Open Document | Data Open Filing 8-K 07 Apr 2020 06 Apr 2020 001-10499
DEFA14A Open Document Open Filing DEFA14A 2020 VIRTUAL MEETING NOTICE 31 Mar 2020 001-10499
DEFA14A Open Document Open Filing DEFA14A 2020 ANNUAL MTG NOTICE 06 Mar 2020 001-10499
DEF 14A Open Document Open Filing DEF 14A 2020 PROXY STATEMENT 06 Mar 2020 23 Apr 2020 001-10499
4 Open Document Open Filing FORM 4 06 Mar 2020 06 Mar 2020
8-K Open Document | Data Open Filing 8-K 03 Mar 2020 03 Mar 2020 001-10499
4 Open Document Open Filing FORM 4 27 Feb 2020 27 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 26 Feb 2020 26 Feb 2020
4 Open Document Open Filing FORM 4 25 Feb 2020 21 Feb 2020
4 Open Document Open Filing FORM 4 25 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 24 Feb 2020 24 Feb 2020
4 Open Document Open Filing FORM 4 19 Feb 2020 18 Feb 2020
4 Open Document Open Filing FORM 4 19 Feb 2020 18 Feb 2020
8-K Open Document | Data Open Filing 8-K 13 Feb 2020 13 Feb 2020 001-10499
10-K Open Document | Data Open Filing 10-K 13 Feb 2020 31 Dec 2019 001-10499
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 12 Feb 2020 005-36015
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2020 005-36015
4 Open Document Open Filing FORM 4 04 Feb 2020 03 Feb 2020
4 Open Document Open Filing FORM 4 04 Feb 2020 03 Feb 2020
4 Open Document Open Filing FORM 4 04 Feb 2020 03 Feb 2020
4 Open Document Open Filing FORM 4 04 Feb 2020 03 Feb 2020
4 Open Document Open Filing FORM 4 04 Feb 2020 03 Feb 2020
SC 13G/A Open Document Open Filing 04 Feb 2020 005-36015
4 Open Document Open Filing FORM 4 03 Jan 2020 02 Jan 2020
4 Open Document Open Filing FORM 4 03 Jan 2020 02 Jan 2020
4 Open Document Open Filing FORM 4 03 Jan 2020 02 Jan 2020
4 Open Document Open Filing FORM 4 03 Jan 2020 02 Jan 2020
4 Open Document Open Filing FORM 4 03 Jan 2020 02 Jan 2020
4 Open Document Open Filing FORM 4 03 Jan 2020 02 Jan 2020
8-K Open Document | Data Open Filing 8-K 23 Dec 2019 23 Dec 2019 001-10499
4 Open Document Open Filing FORM 4 18 Dec 2019 17 Dec 2019
8-K Open Document | Data Open Filing 8-K 13 Dec 2019 13 Dec 2019 001-10499
8-K Open Document | Data Open Filing 8-K 10 Dec 2019 10 Dec 2019 001-10499
4 Open Document Open Filing FORM 4 09 Dec 2019 06 Dec 2019
4 Open Document Open Filing FORM 4 03 Dec 2019 29 Nov 2019
3 Open Document Open Filing FORM 3 03 Dec 2019 03 Dec 2019
8-K Open Document | Data Open Filing 8-K 08 Nov 2019 08 Nov 2019 001-10499
4 Open Document Open Filing FORM 4 06 Nov 2019 06 Nov 2019
8-K Open Document | Data Open Filing 8-K 01 Nov 2019 01 Nov 2019 001-10499
3 Open Document Open Filing FORM 3 31 Oct 2019 31 Oct 2019
8-K Open Document | Data Open Filing 8-K 30 Oct 2019 30 Oct 2019 001-10499
10-Q Open Document | Data Open Filing 10-Q 30 Oct 2019 30 Sep 2019 001-10499
8-K Open Document | Data Open Filing 8-K 02 Oct 2019 02 Oct 2019 001-10499
8-K Open Document | Data Open Filing 8-K 20 Sep 2019 20 Sep 2019 001-10499
8-K Open Document | Data Open Filing 8-K 04 Sep 2019 04 Sep 2019 001-10499
4 Open Document Open Filing FORM 4 08 Aug 2019 06 Aug 2019
144 Open Document Open Filing 144 ROWE 2019 AUG 05 05 Aug 2019 001-10499
4 Open Document Open Filing FORM 4 01 Aug 2019 01 Aug 2019
144 Open Document Open Filing 144 SCHROEPPEL JULY 2019 31 Jul 2019 001-10499
4 Open Document Open Filing FORM 4 29 Jul 2019 26 Jul 2019
144 Open Document Open Filing 144 GRAHAME JULY 2019 25 Jul 2019 001-10499
8-K Open Document | Data Open Filing 8-K 24 Jul 2019 24 Jul 2019 001-10499
10-Q Open Document | Data Open Filing 10-Q 24 Jul 2019 30 Jun 2019 001-10499
8-K Open Document Open Filing 8-K MT FIRST MORTGAGE BONDS 2019 02 Jul 2019 26 Jun 2019 001-10499
4 Open Document Open Filing FORM 4 13 Jun 2019 13 Jun 2019
144 Open Document Open Filing 144 ROWE JUNE 2019 13 Jun 2019 001-10499
8-K Open Document Open Filing 8-K 2019 AGA FINANCIAL FORUM 21 May 2019 21 May 2019 001-10499
8-K Open Document Open Filing 8-K 2019 ANNUAL MEETING VOTING RESULTS 30 Apr 2019 24 Apr 2019 001-10499
8-K Open Document Open Filing 8-K 24 Apr 2019 23 Apr 2019 001-10499
10-Q Open Document | Data Open Filing 10-Q 24 Apr 2019 31 Mar 2019 001-10499
DEFA14A Open Document Open Filing DEFA14A ADDITIONAL MATERIALS 2019 05 Apr 2019 001-10499
8-K Open Document Open Filing 8-K WEST COAST UTILITIES 2019 20 Mar 2019 20 Mar 2019 001-10499
DEFA14A Open Document Open Filing DEFA14A 2019 ANNUAL MEETING NOTICE 07 Mar 2019 001-10499
DEF 14A Open Document Open Filing DEF 14A 2019 PROXY STATEMENT 07 Mar 2019 24 Apr 2019 001-10499
8-K Open Document Open Filing 8-K NEW YORK BOSTON PRESENTATION 05 Mar 2019 05 Mar 2019 001-10499
4 Open Document Open Filing FORM 4 28 Feb 2019 27 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 27 Feb 2019 25 Feb 2019
4 Open Document Open Filing FORM 4 25 Feb 2019 25 Feb 2019
144 Open Document Open Filing 144 HORSFALL FEB 22 2019 22 Feb 2019 001-10499
4 Open Document Open Filing FORM 4 19 Feb 2019 19 Feb 2019
8-K Open Document Open Filing 8-K 2019 LTIP AWARDS 15 Feb 2019 11 Feb 2019 001-10499
8-K Open Document Open Filing 8-K 12 Feb 2019 11 Feb 2019 001-10499
10-K Open Document | Data Open Filing FORM 10-K 2018 12 Feb 2019 31 Dec 2018 001-10499
SC 13G/A Open Document Open Filing 11 Feb 2019 005-36015
SC 13G Open Document Open Filing SC 13G 11 Feb 2019 005-36015
4 Open Document Open Filing FORM 4 04 Feb 2019 01 Feb 2019
4 Open Document Open Filing FORM 4 04 Feb 2019 01 Feb 2019
4 Open Document Open Filing FORM 4 04 Feb 2019 01 Feb 2019
4 Open Document Open Filing FORM 4 04 Feb 2019 01 Feb 2019
SC 13G/A Open Document Open Filing 31 Jan 2019 005-36015
SC 13G/A Open Document Open Filing NONE 07 Jan 2019 005-36015
4 Open Document Open Filing FORM 4 03 Jan 2019 02 Jan 2019
4 Open Document Open Filing FORM 4 03 Jan 2019 02 Jan 2019
4 Open Document Open Filing FORM 4 03 Jan 2019 02 Jan 2019
4 Open Document Open Filing FORM 4 03 Jan 2019 02 Jan 2019
8-K Open Document Open Filing 8-K 2019 ANNUAL INCENTIVE AND 2018 ERRP GRANTS 19 Dec 2018 13 Dec 2018 001-10499
8-K Open Document Open Filing 8-K 2018 WELLS FARGO 04 Dec 2018 04 Dec 2018 001-10499
4 Open Document Open Filing FORM 4 16 Nov 2018 16 Nov 2018
144 Open Document Open Filing 144 GRAHAME NOV 2018 15 Nov 2018 001-10499
4 Open Document Open Filing FORM 4 13 Nov 2018 08 Nov 2018
SC 13G/A Open Document Open Filing 13 Nov 2018 005-36015
8-K Open Document Open Filing 8-K 09 Nov 2018 09 Nov 2018 001-10499
144 Open Document Open Filing 144 HORSFALL NOV 6 2018 06 Nov 2018 001-10499
4 Open Document Open Filing FORM 4 30 Oct 2018 29 Oct 2018
8-K Open Document Open Filing 8-K 24 Oct 2018 24 Oct 2018 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q SEPTEMBER 30, 2018 24 Oct 2018 30 Sep 2018 001-10499
8-K Open Document Open Filing 8-K BAML TX POWER CONFERENCE 27 Sep 2018 27 Sep 2018 001-10499
8-K Open Document Open Filing 8-K FALL INVESTOR MEETINGS 2018 12 Sep 2018 12 Sep 2018 001-10499
8-K Open Document Open Filing 8-K BARCLAYS POWER CONF 2018 04 Sep 2018 04 Sep 2018 001-10499
4 Open Document Open Filing FORM 4 27 Jul 2018 27 Jul 2018
4/A Open Document Open Filing FORM 4/A 25 Jul 2018 24 Jul 2018
4 Open Document Open Filing FORM 4 25 Jul 2018 24 Jul 2018
8-K Open Document Open Filing 8-K OHIO PRESENTATION 2018 23 Jul 2018 23 Jul 2018 001-10499
S-3ASR Open Document Open Filing S-3ASR DRIP REG STMT 2018 20 Jul 2018 333-226253
8-K Open Document Open Filing 8-K EARNINGS RELEASE Q2 2018 20 Jul 2018 19 Jul 2018 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q 6.30.18 20 Jul 2018 30 Jun 2018 001-10499
8-K Open Document Open Filing 8-K 2018 AGA FINANCIAL CONFERENCE 18 May 2018 18 May 2018 001-10499
UPLOAD Open Document Open Filing 15 May 2018
CORRESP Open Document Open Filing 02 May 2018
4 Open Document Open Filing FORM 4 02 May 2018 30 Apr 2018
4 Open Document Open Filing FORM 4 02 May 2018 01 May 2018
4 Open Document Open Filing FORM 4 02 May 2018 01 May 2018
8-K Open Document Open Filing 8-K ANNUAL MEETING VOTING RESULTS 30 Apr 2018 25 Apr 2018 001-10499
8-K Open Document Open Filing 8-K EARNINGS RELEASE Q1 2018 25 Apr 2018 24 Apr 2018 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q 3.31.18 25 Apr 2018 31 Mar 2018 001-10499
UPLOAD Open Document Open Filing 18 Apr 2018
8-K Open Document Open Filing 8-K WEST COAST UTILITIES 2018 21 Mar 2018 21 Mar 2018 001-10499
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
4 Open Document Open Filing FORM 4 12 Mar 2018 08 Mar 2018
DEFA14A Open Document Open Filing DEFA14A 2018 ANNUAL MEETING NOTICE 07 Mar 2018 001-10499
DEF 14A Open Document Open Filing DEF 14A 2018 PROXY STATEMENT 07 Mar 2018 25 Apr 2018 001-10499
4 Open Document Open Filing FORM 4 02 Mar 2018 02 Mar 2018
4 Open Document Open Filing FORM 4 01 Mar 2018 28 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 28 Feb 2018 27 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 26 Feb 2018 22 Feb 2018
4 Open Document Open Filing FORM 4 16 Feb 2018 15 Feb 2018
8-K Open Document Open Filing 8-K 2018 LTIP AWARDS 16 Feb 2018 12 Feb 2018 001-10499
8-K Open Document Open Filing 8-K 15 Feb 2018 15 Feb 2018 001-10499
424B5 Open Document Open Filing 424B5 15 Feb 2018 333-223019
8-K Open Document Open Filing 8-K DRAPER RESIGNATION 15 Feb 2018 12 Feb 2018 001-10499
S-3ASR Open Document Open Filing S-3ASR 2018 13 Feb 2018 333-223019
8-K Open Document Open Filing 8-K Q4 2017 EARNINGS 13 Feb 2018 12 Feb 2018 001-10499
10-K Open Document | Data Open Filing FORM 10-K 2017 13 Feb 2018 31 Dec 2017 001-10499
SC 13G/A Open Document Open Filing 09 Feb 2018 005-36015
4 Open Document Open Filing FORM 4 05 Feb 2018 02 Feb 2018
4 Open Document Open Filing FORM 4 05 Feb 2018 02 Feb 2018
4 Open Document Open Filing FORM 4 05 Feb 2018 02 Feb 2018
4 Open Document Open Filing FORM 4 05 Feb 2018 02 Feb 2018
4 Open Document Open Filing FORM 4 05 Feb 2018 02 Feb 2018
4 Open Document Open Filing FORM 4 05 Feb 2018 02 Feb 2018
SC 13G/A Open Document Open Filing 19 Jan 2018 005-36015
SC 13G Open Document Open Filing NONE 10 Jan 2018 005-36015
4 Open Document Open Filing FORM 4 04 Jan 2018 03 Jan 2018
4 Open Document Open Filing FORM 4 04 Jan 2018 03 Jan 2018
8-K Open Document Open Filing 8-K 2017 DEC NY PRESENTATION 04 Dec 2017 04 Dec 2017 001-10499
4 Open Document Open Filing FORM 4 01 Dec 2017 01 Dec 2017
8-K Open Document Open Filing 8-K MONTANA FMB NOV 2017 08 Nov 2017 06 Nov 2017 001-10499
4 Open Document Open Filing FORM 4 06 Nov 2017 06 Nov 2017
8-K Open Document Open Filing 8-K 2017 EEI FINANCIAL 03 Nov 2017 03 Nov 2017 001-10499
4 Open Document Open Filing FORM 4 03 Nov 2017 01 Nov 2017
8-K Open Document Open Filing 8-K EARNINGS RELEASE Q3 2017 02 Nov 2017 02 Nov 2017 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q SEPTEMBER 30, 2017 02 Nov 2017 30 Sep 2017 001-10499
144 Open Document Open Filing ROWE FORM 144 OCTOBER 16 2017 16 Oct 2017 001-10499
8-K Open Document Open Filing 8-K 06 Sep 2017 06 Sep 2017 001-10499
424B5 Open Document Open Filing 424B5 06 Sep 2017 333-202126
4 Open Document Open Filing FORM 4 05 Sep 2017 01 Sep 2017
4 Open Document Open Filing FORM 4 25 Aug 2017 24 Aug 2017
4 Open Document Open Filing FORM 4 02 Aug 2017 01 Aug 2017
8-K Open Document | Data Open Filing 8-K 2017 Q2 EARNINGS 26 Jul 2017 25 Jul 2017 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q JUNE 30, 2017 26 Jul 2017 30 Jun 2017 001-10499
4/A Open Document Open Filing FORM 4/A 08 Jun 2017 05 Jun 2017
4 Open Document Open Filing FORM 4 06 Jun 2017 05 Jun 2017
4 Open Document Open Filing FORM 4 30 May 2017 26 May 2017
4 Open Document Open Filing FORM 4 30 May 2017 26 May 2017
8-K Open Document Open Filing 8-K 2017 MIDWEST AND AGA FINANCIAL FORUM 17 May 2017 17 May 2017 001-10499
4 Open Document Open Filing FORM 4 15 May 2017 15 May 2017
144 Open Document Open Filing 144 ROWE MAY 11 2017 11 May 2017 001-10499
4 Open Document Open Filing FORM 4 04 May 2017 03 May 2017
4 Open Document Open Filing FORM 4 03 May 2017 01 May 2017
8-K Open Document Open Filing 8-K 2017 ANNUAL MEETING VOTING RESULTS 02 May 2017 27 Apr 2017 001-10499
4 Open Document Open Filing FORM 4 02 May 2017 01 May 2017
3 Open Document Open Filing FORM 3 28 Apr 2017 28 Apr 2017
3 Open Document Open Filing FORM 3 28 Apr 2017 28 Apr 2017
8-K Open Document Open Filing 8-K Q1 2017 EARNINGS 27 Apr 2017 27 Apr 2017 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q MARCH 31, 2017 27 Apr 2017 31 Mar 2017 001-10499
8-K Open Document Open Filing 8-K WEST COAST UTILITIES 2017 22 Mar 2017 22 Mar 2017 001-10499
DEFA14A Open Document Open Filing DEFA14A 2017 ANNUAL MEETING NOTICE 16 Mar 2017 001-10499
DEF 14A Open Document Open Filing DEF 14A 2017 PROXY STATEMENT 16 Mar 2017 16 Mar 2017 001-10499
4 Open Document Open Filing FORM 4 10 Mar 2017 10 Mar 2017
4 Open Document Open Filing FORM 4 08 Mar 2017 08 Mar 2017
4 Open Document Open Filing FORM 4 07 Mar 2017 06 Mar 2017
4 Open Document Open Filing FORM 4 07 Mar 2017 07 Mar 2017
4 Open Document Open Filing FORM 4 06 Mar 2017 03 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
4 Open Document Open Filing FORM 4 03 Mar 2017 01 Mar 2017
SC 13G/A Open Document Open Filing 02 Mar 2017 005-36015
8-K Open Document Open Filing 8-K 2017 UBS UTILITIES 28 Feb 2017 28 Feb 2017 001-10499
8-K Open Document Open Filing 8-K BRADLEY RESIGNATION 27 Feb 2017 22 Feb 2017 001-10499
8-K Open Document Open Filing 8-K 2017 LTIP AWARDS 23 Feb 2017 16 Feb 2017 001-10499
8-K Open Document Open Filing 8-K Q4 2016 EARNINGS 17 Feb 2017 16 Feb 2017 001-10499
10-K Open Document | Data Open Filing FORM 10-K 12.31.16 17 Feb 2017 31 Dec 2016 001-10499
SC 13G/A Open Document Open Filing 13 Feb 2017 005-36015
SC 13G/A Open Document Open Filing 10 Feb 2017 005-36015
4 Open Document Open Filing FORM 4 03 Feb 2017 02 Feb 2017
4 Open Document Open Filing FORM 4 03 Feb 2017 02 Feb 2017
4 Open Document Open Filing FORM 4 03 Feb 2017 02 Feb 2017
4 Open Document Open Filing FORM 4 03 Feb 2017 02 Feb 2017
4 Open Document Open Filing FORM 4 03 Feb 2017 02 Feb 2017
SC 13G/A Open Document Open Filing 17 Jan 2017 005-36015
4/A Open Document Open Filing FORM 4/A 10 Jan 2017 03 Jan 2017
4 Open Document Open Filing FORM 4 10 Jan 2017 09 Jan 2017
4 Open Document Open Filing FORM 4 05 Jan 2017 03 Jan 2017
4 Open Document Open Filing FORM 4 05 Jan 2017 03 Jan 2017
4 Open Document Open Filing FORM 4 04 Jan 2017 03 Jan 2017
8-K Open Document Open Filing 8-K THIRD AMENDED CREDIT AGREEMENT 16 Dec 2016 12 Dec 2016 001-10499
8-K Open Document Open Filing 8-K 2016 ERRP AND 2017 ANNUAL INCENTIVE PLAN 13 Dec 2016 07 Dec 2016 001-10499
8-K Open Document Open Filing 8-K 2016 12 12 EAST COAST INVESTOR MEETINGS 12 Dec 2016 12 Dec 2016 001-10499
3 Open Document Open Filing FORM 3 09 Dec 2016 09 Dec 2016
8-K Open Document Open Filing 8-K TONY CLARK DIRECTOR 08 Dec 2016 06 Dec 2016 001-10499
4 Open Document Open Filing FORM 4 28 Nov 2016 28 Nov 2016
4 Open Document Open Filing FORM 4 21 Nov 2016 21 Nov 2016
8-K Open Document Open Filing 8-K 2016 EEI FINANCIAL CONFERENCE 04 Nov 2016 04 Nov 2016 001-10499
4 Open Document Open Filing FORM 4 02 Nov 2016 01 Nov 2016
4 Open Document Open Filing FORM 4 02 Nov 2016 01 Nov 2016
4 Open Document Open Filing FORM 4 02 Nov 2016 01 Nov 2016
8-K Open Document Open Filing 8-K KEY EMPLOYEE SEVERANCE PLAN 2016 25 Oct 2016 19 Oct 2016 001-10499
8-K Open Document Open Filing 8-K 2016 WEST COAST PRESENTATION 24 Oct 2016 24 Oct 2016 001-10499
8-K Open Document Open Filing 8-K Q3 2016 EARNINGS 20 Oct 2016 20 Oct 2016 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q SEPTEMBER 30, 2016 20 Oct 2016 30 Sep 2016 001-10499
8-K Open Document Open Filing 8-K 2016 09 30 SD FMB 07 Oct 2016 30 Sep 2016 001-10499
4 Open Document Open Filing FORM 4 20 Sep 2016 19 Sep 2016
144 Open Document Open Filing 144 ROWE SEPT 19 2016 19 Sep 2016 001-10499
8-K Open Document Open Filing 8-K 2016 09 08 NY INVESTORS 08 Sep 2016 08 Sep 2016 001-10499
8-K Open Document Open Filing 8-K 2016 POLLUTION CONTROL BONDS 16 Aug 2016 11 Aug 2016 001-10499
4 Open Document Open Filing FORM 4 04 Aug 2016 02 Aug 2016
4 Open Document Open Filing FORM 4 02 Aug 2016 01 Aug 2016
4 Open Document Open Filing FORM 4 02 Aug 2016 01 Aug 2016
4 Open Document Open Filing FORM 4 02 Aug 2016 01 Aug 2016
4 Open Document Open Filing FORM 4 29 Jul 2016 27 Jul 2016
8-K Open Document Open Filing 8-K 2016 Q2 EARNINGS RELEASE 22 Jul 2016 22 Jul 2016 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q JUNE 30, 2016 22 Jul 2016 30 Jun 2016 001-10499
8-K Open Document Open Filing 8-K SD FMB 22 Jun 2016 15 Jun 2016 001-10499
4 Open Document Open Filing FORM 4 10 Jun 2016 09 Jun 2016
4 Open Document Open Filing FORM 4 08 Jun 2016 07 Jun 2016
144 Open Document Open Filing 144 ROWE JUNE 6 2016 06 Jun 2016 001-10499
4 Open Document Open Filing FORM 4 20 May 2016 19 May 2016
8-K Open Document Open Filing 8-K 2016 AMENDMENT OF ARTICLES AND BYLAWS 18 May 2016 12 May 2016 001-10499
8-K Open Document | Data Open Filing 8-K 2016 AGA FINANCIAL FORUM 13 May 2016 13 May 2016 001-10499
4 Open Document Open Filing FORM 4 03 May 2016 02 May 2016
4 Open Document Open Filing FORM 4 03 May 2016 02 May 2016
4 Open Document Open Filing FORM 4 03 May 2016 02 May 2016
4 Open Document Open Filing FORM 4 03 May 2016 02 May 2016
8-K Open Document | Data Open Filing 8-K SD INVEST SOC PRESENTATION 28 Apr 2016 28 Apr 2016 001-10499
4 Open Document Open Filing FORM 4 27 Apr 2016 26 Apr 2016
144 Open Document Open Filing 144 HORSFALL APR 26 2016 26 Apr 2016 001-10499
8-K Open Document Open Filing 8-K 2016 ANNUAL MEETING RESULTS 26 Apr 2016 20 Apr 2016 001-10499
8-K Open Document | Data Open Filing 8-K 2016 04 25 NY AND MIDW MTGS 25 Apr 2016 25 Apr 2016 001-10499
8-K Open Document | Data Open Filing 8-K EARNINGS RELEASE Q1 2016 20 Apr 2016 20 Apr 2016 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q 3.31.16 20 Apr 2016 31 Mar 2016 001-10499
8-K Open Document | Data Open Filing 8-K 2016 WILLIAMS WEST COAST UTILITY 16 Mar 2016 16 Mar 2016 001-10499
4 Open Document Open Filing FORM 4 14 Mar 2016 14 Mar 2016
4 Open Document Open Filing FORM 4 14 Mar 2016 14 Mar 2016
4 Open Document Open Filing FORM 4 11 Mar 2016 10 Mar 2016
4 Open Document Open Filing FORM 4 07 Mar 2016 04 Mar 2016
DEFA14A Open Document Open Filing DEFA14A 2016 ANNUAL MTG NOTICE 07 Mar 2016 001-10499
DEF 14A Open Document Open Filing DEF 14A 2016 PROXY STATEMENT 07 Mar 2016 20 Apr 2016 001-10499
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
4 Open Document Open Filing FORM 4 02 Mar 2016 01 Mar 2016
8-K Open Document Open Filing 8-K 2016 UBS UTILITIES CONFERENCE 01 Mar 2016 01 Mar 2016 001-10499
4 Open Document Open Filing FORM 4 16 Feb 2016 16 Feb 2016
4 Open Document Open Filing FORM 4 16 Feb 2016 16 Feb 2016
8-K Open Document Open Filing 8-K 2016 ANNUAL AND LONG-TERM INCENTIVE 16 Feb 2016 10 Feb 2016 001-10499
SC 13G/A Open Document Open Filing 16 Feb 2016 005-36015
PRE 14A Open Document Open Filing DEF 14A PRELIMINARY PROXY STATEMENT 12 Feb 2016 20 Apr 2016 001-10499
8-K Open Document Open Filing 8-K 2015 FINANCIAL RESULTS 11 Feb 2016 11 Feb 2016 001-10499
SC 13G/A Open Document Open Filing 11 Feb 2016 005-36015
10-K Open Document | Data Open Filing 10-K 11 Feb 2016 31 Dec 2015 001-10499
SC 13G/A Open Document Open Filing NWE AS OF 12/31/2015 09 Feb 2016 005-36015
4 Open Document Open Filing FORM 4 02 Feb 2016 02 Feb 2016
4 Open Document Open Filing FORM 4 02 Feb 2016 02 Feb 2016
4 Open Document Open Filing FORM 4 02 Feb 2016 02 Feb 2016
4 Open Document Open Filing FORM 4 02 Feb 2016 02 Feb 2016
4 Open Document Open Filing FORM 4 02 Feb 2016 02 Feb 2016
8-K Open Document Open Filing 8-K 29 Jan 2016 29 Jan 2016 001-10499
8-K Open Document Open Filing 8-K PEOPLES RETIREMENT 20 Jan 2016 14 Jan 2016 001-10499
4 Open Document Open Filing FORM 4 11 Jan 2016 07 Jan 2016
4 Open Document Open Filing FORM 4 11 Jan 2016 07 Jan 2016
NO ACT Open Document Open Filing AUTO-GENERATED PAPER DOCUMENT 08 Jan 2016 11 Dec 2015 001-10499
SC 13G/A Open Document Open Filing 08 Jan 2016 005-36015
4 Open Document Open Filing FORM 4 06 Jan 2016 04 Jan 2016
4 Open Document Open Filing FORM 4 06 Jan 2016 04 Jan 2016
4 Open Document Open Filing FORM 4 06 Jan 2016 04 Jan 2016
4 Open Document Open Filing FORM 4 01 Dec 2015 01 Dec 2015
8-K Open Document Open Filing 8-K 50TH EEI FINANCIAL CONFERENCE PRESENTATION 09 Nov 2015 09 Nov 2015 001-10499
4 Open Document Open Filing FORM 4 03 Nov 2015 01 Nov 2015
4 Open Document Open Filing FORM 4 03 Nov 2015 01 Nov 2015
4 Open Document Open Filing FORM 4 03 Nov 2015 01 Nov 2015
4 Open Document Open Filing FORM 4 03 Nov 2015 01 Nov 2015
4 Open Document Open Filing FORM 4 03 Nov 2015 01 Nov 2015
3 Open Document Open Filing FORM 3 26 Oct 2015 26 Oct 2015
8-K Open Document Open Filing 8-K LAIL APPOINTMENT 22 Oct 2015 21 Oct 2015 001-10499
8-K Open Document Open Filing 8-K 2015 3RD Q FINANCIAL RESULTS 22 Oct 2015 21 Oct 2015 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q SEPTEMBER 30, 2015 22 Oct 2015 30 Sep 2015 001-10499
8-K Open Document Open Filing 8-K KLIEWER DEPARTURE 16 Oct 2015 13 Oct 2015 001-10499
8-K Open Document Open Filing 8-K SD FMBS AND UA 05 Oct 2015 29 Sep 2015 001-10499
4 Open Document Open Filing FORM 4 01 Oct 2015 01 Oct 2015
424B2 Open Document Open Filing 424B2 30 Sep 2015 333-202126
424B2 Open Document Open Filing 424B2 29 Sep 2015 333-202126
8-K Open Document Open Filing 8-K SD RATE CASE AND BEETHOVEN 25 Sep 2015 25 Sep 2015 001-10499
8-K Open Document Open Filing 8-K 2015 NORTHEAST PRESENTATION 15 Sep 2015 15 Sep 2015 001-10499
8-K Open Document Open Filing 8-K LRAM INFORMATION 11 Sep 2015 08 Sep 2015 001-10499
UPLOAD Open Document Open Filing 08 Sep 2015
4 Open Document Open Filing FORM 4 02 Sep 2015 01 Sep 2015
CORRESP Open Document Open Filing 28 Aug 2015
4 Open Document Open Filing FORM 4 20 Aug 2015 18 Aug 2015
UPLOAD Open Document Open Filing 14 Aug 2015
4 Open Document Open Filing FORM 4 11 Aug 2015 07 Aug 2015
4 Open Document Open Filing FORM 4 05 Aug 2015 04 Aug 2015
4 Open Document Open Filing FORM 4 04 Aug 2015 03 Aug 2015
4 Open Document Open Filing FORM 4 04 Aug 2015 03 Aug 2015
4 Open Document Open Filing FORM 4 04 Aug 2015 03 Aug 2015
4 Open Document Open Filing FORM 4 04 Aug 2015 03 Aug 2015
4 Open Document Open Filing FORM 4 04 Aug 2015 03 Aug 2015
8-K Open Document Open Filing 8-K 2015 UBS TORONTO PRESENTATION 28 Jul 2015 28 Jul 2015 001-10499
S-3ASR Open Document Open Filing S-3ASR 24 Jul 2015 333-205834
8-K Open Document Open Filing 8-K BEETHOVEN ACQUISITION 23 Jul 2015 22 Jul 2015 001-10499
8-K Open Document Open Filing 8-K 2015 2ND Q FINANCIAL RESULTS 23 Jul 2015 23 Jul 2015 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q JUNE 30, 2015 23 Jul 2015 30 Jun 2015 001-10499
SC 13G/A Open Document Open Filing 10 Jul 2015 005-36015
4 Open Document Open Filing FORM 4 02 Jul 2015 01 Jul 2015
4 Open Document Open Filing FORM 4 02 Jul 2015 01 Jul 2015
4 Open Document Open Filing FORM 4 02 Jul 2015 01 Jul 2015
4 Open Document Open Filing FORM 4 02 Jul 2015 01 Jul 2015
4 Open Document Open Filing FORM 4 02 Jul 2015 01 Jul 2015
8-K Open Document Open Filing 8-K MT FIRST MORTGAGE BONDS 2015 29 Jun 2015 23 Jun 2015 001-10499
4 Open Document Open Filing FORM 4 01 Jun 2015 01 Jun 2015
8-K Open Document Open Filing 8-K 2015 AGA FINANCIAL FORUM 18 May 2015 18 May 2015 001-10499
4 Open Document Open Filing FORM 4 12 May 2015 12 May 2015
4 Open Document Open Filing FORM 4 11 May 2015 11 May 2015
4 Open Document Open Filing FORM 4 07 May 2015 05 May 2015
4 Open Document Open Filing FORM 4 04 May 2015 01 May 2015
4 Open Document Open Filing FORM 4 04 May 2015 30 Apr 2015
4 Open Document Open Filing FORM 4 04 May 2015 30 Apr 2015
4 Open Document Open Filing FORM 4 04 May 2015 30 Apr 2015
4 Open Document Open Filing FORM 4 04 May 2015 30 Apr 2015
3 Open Document Open Filing FORM 3 01 May 2015 01 May 2015
8-K Open Document Open Filing 8-K 2015 ANNUAL MEETING VOTING RESULTS 29 Apr 2015 23 Apr 2015 001-10499
8-K Open Document Open Filing 8-K NY PRESENTATION 04 2015 27 Apr 2015 27 Apr 2015 001-10499
8-K Open Document Open Filing 8-K Q1 2015 EARNINGS 23 Apr 2015 23 Apr 2015 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q 3.31.15 23 Apr 2015 31 Mar 2015 001-10499
4 Open Document Open Filing FORM 4 02 Apr 2015 01 Apr 2015
8-K Open Document Open Filing 8-K 17 Mar 2015 17 Mar 2015 001-10499
4 Open Document Open Filing FORM 4 09 Mar 2015 06 Mar 2015
4 Open Document Open Filing FORM 4 09 Mar 2015 06 Mar 2015
DEFA14A Open Document Open Filing ANNUAL MEETING NOTICE 06 Mar 2015 001-10499
DEF 14A Open Document Open Filing DEF 14A 06 Mar 2015 31 Dec 2014 001-10499
4 Open Document Open Filing FORM 4 03 Mar 2015 02 Mar 2015
4 Open Document Open Filing FORM 4 03 Mar 2015 02 Mar 2015
4 Open Document Open Filing FORM 4 03 Mar 2015 02 Mar 2015
4 Open Document Open Filing FORM 4 03 Mar 2015 02 Mar 2015
4 Open Document Open Filing FORM 4 03 Mar 2015 02 Mar 2015
4 Open Document Open Filing FORM 4 03 Mar 2015 02 Mar 2015
ARS Open Document Open Filing AUTO-GENERATED PAPER DOCUMENT 27 Feb 2015 31 Dec 2014 001-10499
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
4 Open Document Open Filing FORM 4 24 Feb 2015 23 Feb 2015
8-K Open Document Open Filing 8-K 2015 LTIP GRANTS 18 Feb 2015 11 Feb 2015 001-10499
S-3ASR Open Document Open Filing S-3ASR 17 Feb 2015 333-202126
SC 13G/A Open Document Open Filing NORTHWESTERN AMENDEMENT 17 Feb 2015 005-36015
8-K Open Document Open Filing 8-K Q4 2014 EARNINGS 12 Feb 2015 12 Feb 2015 001-10499
10-K Open Document | Data Open Filing 10-K NORTHWESTERN CORPORATION 12 Feb 2015 31 Dec 2014 001-10499
SC 13G/A Open Document Open Filing NWE AS OF 12/31/2014 11 Feb 2015 005-36015
SC 13G/A Open Document Open Filing 10 Feb 2015 005-36015
4 Open Document Open Filing FORM 4 03 Feb 2015 02 Feb 2015
4 Open Document Open Filing FORM 4 03 Feb 2015 02 Feb 2015
4 Open Document Open Filing FORM 4 03 Feb 2015 02 Feb 2015
4 Open Document Open Filing FORM 4 03 Feb 2015 02 Feb 2015
4 Open Document Open Filing FORM 4 03 Feb 2015 02 Feb 2015
SC 13G/A Open Document Open Filing 15 Jan 2015 005-36015
4 Open Document Open Filing FORM 4 05 Jan 2015 02 Jan 2015
4 Open Document Open Filing FORM 4 05 Jan 2015 02 Jan 2015
4 Open Document Open Filing FORM 4 05 Jan 2015 02 Jan 2015
4 Open Document Open Filing FORM 4 05 Jan 2015 02 Jan 2015
4 Open Document Open Filing FORM 4 05 Jan 2015 02 Jan 2015
4 Open Document Open Filing FORM 4 05 Jan 2015 05 Jan 2015
8-K Open Document Open Filing 8-K 24 Dec 2014 19 Dec 2014 001-10499
8-K Open Document Open Filing 8-K 22 Dec 2014 16 Dec 2014 001-10499
4 Open Document Open Filing FORM 4 11 Dec 2014 10 Dec 2014
SC 13G/A Open Document Open Filing 10 Dec 2014 005-36015
SC 13G Open Document Open Filing NORTHWESTERN INITIAL 09 Dec 2014 005-36015
8-K Open Document Open Filing 8-K 09 Dec 2014 09 Dec 2014 001-10499
4 Open Document Open Filing FORM 4 02 Dec 2014 01 Dec 2014
4 Open Document Open Filing FORM 4 02 Dec 2014 01 Dec 2014
8-K Open Document Open Filing 8-K 24 Nov 2014 18 Nov 2014 001-10499
8-K Open Document Open Filing 8-K 14 Nov 2014 14 Nov 2014 001-10499
424B2 Open Document Open Filing 424B2 13 Nov 2014 333-179568
8-K Open Document Open Filing 8-K 12 Nov 2014 05 Nov 2014 001-10499
8-K Open Document Open Filing 8-K 10 Nov 2014 10 Nov 2014 001-10499
8-K Open Document Open Filing FORM 8-K 10 Nov 2014 04 Nov 2014 001-10499
424B2 Open Document Open Filing 424B2 06 Nov 2014 333-179568
424B2 Open Document Open Filing 424B2 05 Nov 2014 333-179568
FWP Open Document Open Filing FWP 05 Nov 2014 333-179568
424B5 Open Document Open Filing 424B5 05 Nov 2014 333-179568
4 Open Document Open Filing FORM 4 04 Nov 2014 03 Nov 2014
4 Open Document Open Filing FORM 4 04 Nov 2014 03 Nov 2014
4 Open Document Open Filing FORM 4 04 Nov 2014 03 Nov 2014
4 Open Document Open Filing FORM 4 04 Nov 2014 03 Nov 2014
4 Open Document Open Filing FORM 4 04 Nov 2014 03 Nov 2014
4 Open Document Open Filing FORM 4 04 Nov 2014 03 Nov 2014
8-K Open Document Open Filing 8-K 03 Nov 2014 03 Nov 2014 001-10499
424B5 Open Document Open Filing 424B5 03 Nov 2014 333-179568
8-K Open Document Open Filing 8-K 30 Oct 2014 30 Oct 2014 001-10499
8-K Open Document Open Filing 8-K 27 Oct 2014 27 Oct 2014 001-10499
8-K Open Document Open Filing 8-K 23 Oct 2014 23 Oct 2014 001-10499
10-Q Open Document | Data Open Filing 10-Q 23 Oct 2014 30 Sep 2014 001-10499
8-K Open Document Open Filing 8-K 06 Oct 2014 01 Oct 2014 001-10499
4 Open Document Open Filing FORM 4 02 Oct 2014 01 Oct 2014
4 Open Document Open Filing FORM 4 02 Oct 2014 01 Oct 2014
8-K Open Document Open Filing 8-K 10 Sep 2014 10 Sep 2014 001-10499
4 Open Document Open Filing FORM 4 02 Sep 2014 02 Sep 2014
4 Open Document Open Filing FORM 4 02 Sep 2014 02 Sep 2014
4 Open Document Open Filing FORM 4 04 Aug 2014 01 Aug 2014
4 Open Document Open Filing FORM 4 04 Aug 2014 01 Aug 2014
4 Open Document Open Filing FORM 4 04 Aug 2014 01 Aug 2014
4 Open Document Open Filing FORM 4 04 Aug 2014 01 Aug 2014
4 Open Document Open Filing FORM 4 04 Aug 2014 01 Aug 2014
4 Open Document Open Filing FORM 4 04 Aug 2014 01 Aug 2014
S-8 Open Document Open Filing S-8 25 Jul 2014 333-197627
8-K Open Document Open Filing 8-K 24 Jul 2014 24 Jul 2014 001-10499
10-Q Open Document | Data Open Filing 10-Q JUNE 30, 2014 24 Jul 2014 30 Jun 2014 001-10499
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 02 Jul 2014 30 Jun 2014
4 Open Document Open Filing FORM 4 03 Jun 2014 02 Jun 2014
4 Open Document Open Filing FORM 4 03 Jun 2014 02 Jun 2014
4/A Open Document Open Filing FORM 4/A 03 Jun 2014 01 Apr 2014
8-K Open Document Open Filing 8-K 16 May 2014 16 May 2014 001-10499
8-K Open Document Open Filing 8-K 05 May 2014 05 May 2014 001-10499
4 Open Document Open Filing FORM 4 02 May 2014 01 May 2014
4 Open Document Open Filing FORM 4 02 May 2014 01 May 2014
4 Open Document Open Filing FORM 4 02 May 2014 01 May 2014
4 Open Document Open Filing FORM 4 02 May 2014 01 May 2014
4 Open Document Open Filing FORM 4 02 May 2014 01 May 2014
4 Open Document Open Filing FORM 4 02 May 2014 01 May 2014
8-K Open Document Open Filing 8-K 29 Apr 2014 24 Apr 2014 001-10499
8-K Open Document Open Filing 8-K 24 Apr 2014 24 Apr 2014 001-10499
10-Q Open Document | Data Open Filing 10-Q 24 Apr 2014 31 Mar 2014 001-10499
4 Open Document Open Filing FORM 4 02 Apr 2014 01 Apr 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 01 Apr 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 31 Mar 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 31 Mar 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 31 Mar 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 31 Mar 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 31 Mar 2014
4 Open Document Open Filing FORM 4 02 Apr 2014 31 Mar 2014
8-K Open Document Open Filing 8-K 02 Apr 2014 02 Apr 2014 001-10499
8-K Open Document Open Filing 8-K 20 Mar 2014 20 Mar 2014 001-10499
ARS Open Document Open Filing AUTO-GENERATED PAPER DOCUMENT 10 Mar 2014 31 Dec 2013 001-10499
DEFA14A Open Document Open Filing DEFA14A 07 Mar 2014 001-10499
DEF 14A Open Document Open Filing DEF 14A 07 Mar 2014 24 Apr 2014 001-10499
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
4 Open Document Open Filing FORM 4 04 Mar 2014 28 Feb 2014
8-K Open Document Open Filing 8-K 04 Mar 2014 04 Mar 2014 001-10499
8-K Open Document Open Filing 8-K 24 Feb 2014 18 Feb 2014 001-10499
8-K Open Document Open Filing 8-K 19 Feb 2014 19 Feb 2014 001-10499
10-K Open Document | Data Open Filing FORM 10-K DECEMBER 31, 2013 19 Feb 2014 31 Dec 2013 001-10499
SC 13G Open Document Open Filing NORTHWESTERN CORP 13G 12 Feb 2014 005-36015
SC 13G/A Open Document Open Filing 12 Feb 2014 005-36015
SC 13G/A Open Document Open Filing NWE AS OF 12/31/2013 10 Feb 2014 005-36015
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
4 Open Document Open Filing FORM 4 04 Feb 2014 03 Feb 2014
SC 13G/A Open Document Open Filing 17 Jan 2014 005-36015
SC 13G/A Open Document Open Filing 10 Jan 2014 005-36015
4 Open Document Open Filing FORM 4 03 Jan 2014 31 Dec 2013
4 Open Document Open Filing FORM 4 03 Jan 2014 31 Dec 2013
4 Open Document Open Filing FORM 4 03 Jan 2014 31 Dec 2013
4 Open Document Open Filing FORM 4 03 Jan 2014 31 Dec 2013
4 Open Document Open Filing FORM 4 03 Jan 2014 31 Dec 2013
4 Open Document Open Filing FORM 4 03 Jan 2014 31 Dec 2013
4 Open Document Open Filing FORM 4 03 Jan 2014 02 Jan 2014
4 Open Document Open Filing FORM 4 03 Jan 2014 02 Jan 2014
8-K Open Document Open Filing 8-K 23 Dec 2013 19 Dec 2013 001-10499
8-K Open Document Open Filing 8-K 16 Dec 2013 10 Dec 2013 001-10499
8-K Open Document Open Filing 8-K 09 Dec 2013 09 Dec 2013 001-10499
4 Open Document Open Filing FORM 4 02 Dec 2013 02 Dec 2013
8-K Open Document Open Filing 8-K 18 Nov 2013 12 Nov 2013 001-10499
8-K Open Document Open Filing 8-K 12 Nov 2013 11 Nov 2013 001-10499
8-K Open Document Open Filing 8-K 08 Nov 2013 05 Nov 2013 001-10499
4 Open Document Open Filing FORM 4 07 Nov 2013 06 Nov 2013
4 Open Document Open Filing FORM 4 04 Nov 2013 01 Nov 2013
4 Open Document Open Filing FORM 4 04 Nov 2013 01 Nov 2013
4 Open Document Open Filing FORM 4 04 Nov 2013 01 Nov 2013
4 Open Document Open Filing FORM 4 04 Nov 2013 01 Nov 2013
4 Open Document Open Filing FORM 4 04 Nov 2013 01 Nov 2013
4 Open Document Open Filing FORM 4 04 Nov 2013 01 Nov 2013
8-K Open Document Open Filing 8-K 24 Oct 2013 24 Oct 2013 001-10499
10-Q Open Document | Data Open Filing 10-Q 24 Oct 2013 30 Sep 2013 001-10499
4 Open Document Open Filing FORM 4 02 Oct 2013 30 Sep 2013
4 Open Document Open Filing FORM 4 02 Oct 2013 30 Sep 2013
4 Open Document Open Filing FORM 4 02 Oct 2013 30 Sep 2013
4 Open Document Open Filing FORM 4 02 Oct 2013 30 Sep 2013
4 Open Document Open Filing FORM 4 02 Oct 2013 30 Sep 2013
4 Open Document Open Filing FORM 4 02 Oct 2013 30 Sep 2013
4 Open Document Open Filing FORM 4 02 Oct 2013 01 Oct 2013
8-K Open Document Open Filing 8-K 27 Sep 2013 26 Sep 2013 001-10499
4 Open Document Open Filing FORM 4 04 Sep 2013 03 Sep 2013
4 Open Document Open Filing FORM 4 02 Aug 2013 01 Aug 2013
4 Open Document Open Filing FORM 4 02 Aug 2013 01 Aug 2013
4 Open Document Open Filing FORM 4 02 Aug 2013 01 Aug 2013
4 Open Document Open Filing FORM 4 02 Aug 2013 01 Aug 2013
4 Open Document Open Filing FORM 4 02 Aug 2013 01 Aug 2013
4 Open Document Open Filing FORM 4 02 Aug 2013 01 Aug 2013
8-K Open Document Open Filing 8-K 30 Jul 2013 30 Jul 2013 001-10499
8-K Open Document Open Filing 8-K 25 Jul 2013 25 Jul 2013 001-10499
10-Q Open Document | Data Open Filing 10-Q 25 Jul 2013 30 Jun 2013 001-10499
8-K Open Document Open Filing 8-K 16 Jul 2013 15 Jul 2013 001-10499
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
4 Open Document Open Filing FORM 4 02 Jul 2013 01 Jul 2013
8-K Open Document Open Filing 8-K 12 Jun 2013 12 Jun 2013 001-10499
4 Open Document Open Filing FORM 4 04 Jun 2013 03 Jun 2013
8-K Open Document Open Filing 8-K 29 May 2013 28 May 2013 001-10499
8-K Open Document Open Filing 8-K 03 May 2013 03 May 2013 001-10499
4 Open Document Open Filing FORM 4 02 May 2013 01 May 2013
4 Open Document Open Filing FORM 4 02 May 2013 01 May 2013
4 Open Document Open Filing FORM 4 02 May 2013 01 May 2013
4 Open Document Open Filing FORM 4 02 May 2013 01 May 2013
4 Open Document Open Filing FORM 4 02 May 2013 01 May 2013
4 Open Document Open Filing FORM 4 02 May 2013 01 May 2013
8-K Open Document Open Filing 8-K 30 Apr 2013 25 Apr 2013 001-10499
8-K Open Document Open Filing Q1 2013 FORM 8-K 25 Apr 2013 25 Apr 2013 001-10499
10-Q Open Document | Data Open Filing FORM 10Q MARCH 31, 2013 25 Apr 2013 31 Mar 2013 001-10499
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
4 Open Document Open Filing FORM 4 02 Apr 2013 01 Apr 2013
8-K Open Document Open Filing 8-K 21 Mar 2013 21 Mar 2013 001-10499
ARS Open Document Open Filing AUTO-GENERATED PAPER DOCUMENT 12 Mar 2013 31 Dec 2012 001-10499
DEFA14A Open Document Open Filing DEFA14A 08 Mar 2013 001-10499
DEF 14A Open Document Open Filing DEF 14A 08 Mar 2013 25 Apr 2013 001-10499
8-K Open Document Open Filing 8-K 04 Mar 2013 04 Mar 2013 001-10499
4 Open Document Open Filing FORM 4 01 Mar 2013 28 Feb 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 01 Mar 2013 01 Mar 2013
4 Open Document Open Filing FORM 4 22 Feb 2013 21 Feb 2013
4 Open Document Open Filing FORM 4 22 Feb 2013 21 Feb 2013
4 Open Document Open Filing FORM 4 22 Feb 2013 21 Feb 2013
4 Open Document Open Filing FORM 4 22 Feb 2013 21 Feb 2013
4 Open Document Open Filing FORM 4 22 Feb 2013 21 Feb 2013
4 Open Document Open Filing FORM 4 22 Feb 2013 21 Feb 2013
8-K Open Document Open Filing 8-K 19 Feb 2013 19 Feb 2013 001-10499
8-K Open Document Open Filing 8-K 19 Feb 2013 13 Feb 2013 001-10499
8-K Open Document Open Filing 8-K 14 Feb 2013 14 Feb 2013 001-10499
10-K Open Document | Data Open Filing 10-K 14 Feb 2013 31 Dec 2012 001-10499
SC 13G Open Document Open Filing MUNDER 13G FILING FOR NORTHWESTERN CORPORATION 13 Feb 2013 005-36015
SC 13G/A Open Document Open Filing NWE AS OF 12/31/12 11 Feb 2013 005-36015
SC 13G/A Open Document Open Filing 11 Feb 2013 005-36015
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
4 Open Document Open Filing FORM 4 04 Feb 2013 01 Feb 2013
SC 13G Open Document Open Filing NORTHWESTERN CORPORATION SC 13G 29 Jan 2013 005-36015
SC 13G/A Open Document Open Filing 11 Jan 2013 005-36015
4 Open Document Open Filing FORM 4 02 Jan 2013 31 Dec 2012
4 Open Document Open Filing FORM 4 02 Jan 2013 31 Dec 2012
4 Open Document Open Filing FORM 4 02 Jan 2013 31 Dec 2012
4 Open Document Open Filing FORM 4 02 Jan 2013 31 Dec 2012
4 Open Document Open Filing FORM 4 02 Jan 2013 31 Dec 2012
4 Open Document Open Filing FORM 4 02 Jan 2013 31 Dec 2012
4 Open Document Open Filing FORM 4 02 Jan 2013 02 Jan 2013
4 Open Document Open Filing FORM 4 02 Jan 2013 02 Jan 2013
8-K Open Document Open Filing 8-K 18 Dec 2012 12 Dec 2012 001-10499
8-K Open Document Open Filing 8-K 10 Dec 2012 10 Dec 2012 001-10499
8-K Open Document Open Filing 8-K 04 Dec 2012 04 Dec 2012 001-10499
4 Open Document Open Filing FORM 4 03 Dec 2012 03 Dec 2012
4 Open Document Open Filing FORM 4 03 Dec 2012 03 Dec 2012
4 Open Document Open Filing FORM 4 03 Dec 2012 03 Dec 2012
8-K Open Document Open Filing 8-K 09 Nov 2012 09 Nov 2012 001-10499
8-K Open Document Open Filing 8-K 09 Nov 2012 09 Nov 2012 001-10499
SC 13G/A Open Document Open Filing 09 Nov 2012 005-36015
4 Open Document Open Filing FORM 4 01 Nov 2012 01 Nov 2012
4 Open Document Open Filing FORM 4 01 Nov 2012 01 Nov 2012
4 Open Document Open Filing FORM 4 01 Nov 2012 01 Nov 2012
4 Open Document Open Filing FORM 4 01 Nov 2012 01 Nov 2012
8-K Open Document Open Filing FORM 8-K EARNINGS RELEASE Q3 2012 24 Oct 2012 24 Oct 2012 001-10499
10-Q Open Document | Data Open Filing 10-Q 24 Oct 2012 30 Sep 2012 001-10499
8-K Open Document Open Filing 8-K 11 Oct 2012 05 Oct 2012 001-10499
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
4 Open Document Open Filing FORM 4 02 Oct 2012 01 Oct 2012
8-K Open Document Open Filing 8-K 02 Oct 2012 01 Oct 2012 001-10499
8-K Open Document Open Filing 8-K DGGS INITIAL DECISION 27 Sep 2012 26 Sep 2012 001-10499
4 Open Document Open Filing FORM 4 04 Sep 2012 04 Sep 2012
8-K Open Document Open Filing 8-K 04 Sep 2012 04 Sep 2012 001-10499
UPLOAD Open Document Open Filing 30 Aug 2012
CORRESP Open Document Open Filing 24 Aug 2012
UPLOAD Open Document Open Filing 14 Aug 2012
8-K Open Document Open Filing 14 Aug 2012 10 Aug 2012 001-10499
4 Open Document Open Filing FORM 4 01 Aug 2012 01 Aug 2012
4 Open Document Open Filing FORM 4 01 Aug 2012 01 Aug 2012
4 Open Document Open Filing FORM 4 01 Aug 2012 01 Aug 2012
4 Open Document Open Filing FORM 4 01 Aug 2012 01 Aug 2012
S-3ASR Open Document Open Filing 27 Jul 2012 333-182895
RW Open Document Open Filing 27 Jul 2012 333-182837
8-K Open Document Open Filing 26 Jul 2012 24 Jul 2012 001-10499
S-3 Open Document Open Filing REGISTRATION STATEMENT 25 Jul 2012 333-182837
8-K Open Document Open Filing FORM 8-K PRESS RELEASE Q2 2012 24 Jul 2012 24 Jul 2012 001-10499
10-Q Open Document | Data Open Filing FORM 10Q FOR JUNE 30, 2012 24 Jul 2012 30 Jun 2012 001-10499
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
4 Open Document Open Filing FORM 4 03 Jul 2012 02 Jul 2012
8-K Open Document Open Filing 12 Jun 2012 12 Jun 2012 001-10499
4 Open Document Open Filing FORM 4 01 Jun 2012 01 Jun 2012
4 Open Document Open Filing FORM 4 31 May 2012 30 May 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 01 May 2012 01 May 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 01 May 2012 01 May 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 01 May 2012 01 May 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 01 May 2012 01 May 2012
8-K Open Document Open Filing 8-K_04/27/2012_VOTING RESULTS 27 Apr 2012 27 Apr 2012 001-10499
424B5 Open Document Open Filing FORM 424(B)(5)_PROSPECTUS SUPPLEMENT 25 Apr 2012 333-179568
8-K Open Document Open Filing 8-K _ 04/25/2012 25 Apr 2012 25 Apr 2012 001-10499
8-K Open Document Open Filing 8-K_04/25/2012_EARNINGS RELEASE 25 Apr 2012 25 Apr 2012 001-10499
10-Q Open Document | Data Open Filing FORM 10-Q MARCH 31, 2012 25 Apr 2012 31 Mar 2012 001-10499
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 30 Mar 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 30 Mar 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 30 Mar 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 30 Mar 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 30 Mar 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 30 Mar 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 02 Apr 2012
4 Open Document Open Filing FORM 4 - GENERATED BY WEBFILINGS 03 Apr 2012 02 Apr 2012