NORTHWESTERN CORP

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)
Get insider transactions for this issuer
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