NORTHERN STATES POWER CO /WI/ SEC EDGAR Filings (CIK 0000072909)

SEC EDGAR filings, ownership reports, and insider transactions for NORTHERN STATES POWER CO /WI/.

Industry
Electric & Other Services Combined (Office Of Energy & Transportation)
Business address
1414 W Hamilton Ave, Eau Claire, WI, 54702
State of incorporation
WI
Fiscal year end
31 December
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NORTHERN STATES POWER CO /WI/ has filed 319 SEC EDGAR filings since 28 Mar 1994

Latest Filings

Recent SEC filings for NORTHERN STATES POWER CO /WI/ including 10-K, 8-K, 10-Q and more.

Form type Document Filing Description Filing date Reporting date File number(s)
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 25 Feb 2026 31 Dec 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Feb 2026 05 Feb 2026 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Nov 2025 06 Nov 2025 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 30 Oct 2025 30 Sep 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Oct 2025 30 Oct 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 Aug 2025 08 Aug 2025 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Jul 2025 30 Jun 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Jul 2025 31 Jul 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Jun 2025 23 Jun 2025 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 424B2 18 Jun 2025 333-278797-03
FWP Open FWP document View SEC filing for FWP FWP 17 Jun 2025 333-278797-03
424B5 Open 424B5 document View SEC filing for 424B5 424B5 17 Jun 2025 333-278797-03
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 May 2025 06 May 2025 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 24 Apr 2025 31 Mar 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 24 Apr 2025 24 Apr 2025 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Apr 2025 31 Mar 2025 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 27 Feb 2025 31 Dec 2024 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Feb 2025 06 Feb 2025 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Oct 2024 30 Sep 2024 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Oct 2024 31 Oct 2024 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2024 30 Jun 2024 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2024 01 Aug 2024 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 May 2024 16 May 2024 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 424B2 14 May 2024 333-278797-03
FWP Open FWP document View SEC filing for FWP FWP 13 May 2024 333-278797-03
424B5 Open 424B5 document View SEC filing for 424B5 424B5 13 May 2024 333-278797-03
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 25 Apr 2024 31 Mar 2024 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Apr 2024 25 Apr 2024 001-03140
S-3ASR Open S-3ASR document View SEC filing for S-3ASR FORM S-3ASR 18 Apr 2024 333-278797-03
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 21 Feb 2024 31 Dec 2023 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Jan 2024 25 Jan 2024 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 13 Nov 2023 09 Nov 2023 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Oct 2023 30 Sep 2023 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Oct 2023 27 Oct 2023 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Sep 2023 01 Sep 2023 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Jul 2023 30 Jun 2023 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jul 2023 27 Jul 2023 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 May 2023 10 May 2023 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Apr 2023 31 Mar 2023 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Apr 2023 27 Apr 2023 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 23 Feb 2023 31 Dec 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 Jan 2023 26 Jan 2023 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Oct 2022 30 Sep 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Oct 2022 27 Oct 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 21 Sep 2022 19 Sep 2022 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Jul 2022 30 Jun 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Jul 2022 28 Jul 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Jul 2022 15 Jul 2022 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Apr 2022 31 Mar 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Apr 2022 28 Apr 2022 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 23 Feb 2022 31 Dec 2021 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jan 2022 27 Jan 2022 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Nov 2021 18 Nov 2021 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Oct 2021 30 Sep 2021 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Oct 2021 28 Oct 2021 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Jul 2021 30 Jun 2021 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 20 Jul 2021 19 Jul 2021 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Jul 2021 02 Jul 2021 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Apr 2021 31 Mar 2021 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Apr 2021 29 Apr 2021 001-03140
S-3ASR Open S-3ASR document View SEC filing for S-3ASR FORM S-3ASR 22 Apr 2021 333-255446-03
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 17 Feb 2021 31 Dec 2020 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Jan 2021 28 Jan 2021 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Oct 2020 30 Sep 2020 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Oct 2020 29 Oct 2020 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Jul 2020 30 Jun 2020 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Jul 2020 30 Jul 2020 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 May 2020 26 May 2020 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 424B2 19 May 2020 333-224333-03
FWP Open FWP document View SEC filing for FWP FWP 18 May 2020 333-224333-03
424B5 Open 424B5 document View SEC filing for 424B5 424B5 18 May 2020 333-224333-03
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 May 2020 31 Mar 2020 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 May 2020 07 May 2020 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 21 Feb 2020 31 Dec 2019 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Jan 2020 30 Jan 2020 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 25 Oct 2019 30 Sep 2019 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 24 Oct 2019 24 Oct 2019 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2019 30 Jun 2019 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2019 01 Aug 2019 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 10 Jun 2019 07 Jun 2019 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 23 May 2019 23 May 2019 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 26 Apr 2019 31 Mar 2019 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Apr 2019 25 Apr 2019 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 22 Feb 2019 31 Dec 2018 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 31 Jan 2019 31 Jan 2019 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 26 Oct 2018 30 Sep 2018 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Oct 2018 25 Oct 2018 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Sep 2018 12 Sep 2018 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 424B2 06 Sep 2018 333-224333-03
FWP Open FWP document View SEC filing for FWP FREE WRITING PROSPECTUS 05 Sep 2018 333-224333-03
424B5 Open 424B5 document View SEC filing for 424B5 424B5 05 Sep 2018 333-224333-03
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Jul 2018 30 Jun 2018 001-03140
10-K/A Open 10-K/A document | Open XBRL data View SEC filing for 10-K/A 10-K/A 27 Jul 2018 31 Dec 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Jul 2018 26 Jul 2018 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Apr 2018 31 Mar 2018 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Apr 2018 26 Apr 2018 001-03140
S-3ASR Open S-3ASR document View SEC filing for S-3ASR FORM S-3ASR 18 Apr 2018 333-224333-03
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 26 Feb 2018 31 Dec 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 07 Feb 2018 07 Feb 2018 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 22 Dec 2017 22 Dec 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Dec 2017 04 Dec 2017 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 424B2 28 Nov 2017 333-203664-02
FWP Open FWP document View SEC filing for FWP FREE WRITING PROSPECTUS 27 Nov 2017 333-203664-02
424B5 Open 424B5 document View SEC filing for 424B5 424B5 27 Nov 2017 333-203664-02
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Oct 2017 30 Sep 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Oct 2017 26 Oct 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 15 Sep 2017 15 Sep 2017 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Jul 2017 30 Jun 2017 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jul 2017 27 Jul 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 05 May 2017 05 May 2017 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Apr 2017 31 Mar 2017 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 27 Apr 2017 27 Apr 2017 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 24 Feb 2017 31 Dec 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 02 Feb 2017 02 Feb 2017 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Oct 2016 30 Sep 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 27 Oct 2016 27 Oct 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Aug 2016 16 Aug 2016 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Aug 2016 30 Jun 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Aug 2016 03 Aug 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 22 Jun 2016 22 Jun 2016 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 May 2016 31 Mar 2016 001-03140
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 May 2016 09 May 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 01 Apr 2016 01 Apr 2016 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 22 Feb 2016 31 Dec 2015 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Jan 2016 28 Jan 2016 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Dec 2015 03 Dec 2015 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 02 Nov 2015 30 Sep 2015 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Oct 2015 29 Oct 2015 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Oct 2015 01 Oct 2015 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Aug 2015 30 Jun 2015 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Jul 2015 30 Jul 2015 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Jun 2015 29 Jun 2015 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 DEFINITIVE PROSPECTUS SUPPLEMENT 23 Jun 2015 333-203664-02
FWP Open FWP document View SEC filing for FWP FREE WRITING PROSPECTUS 22 Jun 2015 333-203664-02
424B5 Open 424B5 document View SEC filing for 424B5 PRELIMINARY PROSPECTUS SUPPLEMENT 22 Jun 2015 333-203664-02
8-K Open 8-K document View SEC filing for 8-K 8-K 29 May 2015 29 May 2015 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 May 2015 31 Mar 2015 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Apr 2015 30 Apr 2015 001-03140
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3ASR 27 Apr 2015 333-203664-02
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 23 Feb 2015 31 Dec 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Jan 2015 29 Jan 2015 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Nov 2014 30 Sep 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Oct 2014 30 Oct 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 17 Oct 2014 14 Oct 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Oct 2014 03 Oct 2014 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Aug 2014 30 Jun 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 31 Jul 2014 31 Jul 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 23 Jun 2014 23 Jun 2014 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 NORTHERN STATES POWER COMPANY WI 424B2 6-16-2014 17 Jun 2014 333-192835
FWP Open FWP document View SEC filing for FWP NORTHERN STATES POWER COMPANY - WI FWP 6-16-2014 16 Jun 2014 333-192835
424B5 Open 424B5 document View SEC filing for 424B5 NORTHERN STATES POWER COMPANY - WI 424B5 6-16-2014 16 Jun 2014 333-192835
8-K Open 8-K document View SEC filing for 8-K 8-K 30 May 2014 30 May 2014 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 May 2014 31 Mar 2014 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 01 May 2014 01 May 2014 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 24 Feb 2014 31 Dec 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Jan 2014 30 Jan 2014 001-03140
EFFECT Open EFFECT document View SEC filing for EFFECT 07 Jan 2014 333-192835
S-3 Open S-3 document View SEC filing for S-3 NORTHERN STATES POWER COMPANY (WISCONSIN) S-3 12-13-2013 13 Dec 2013 333-192835
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Dec 2013 12 Dec 2013 001-03140
10-Q/A Open 10-Q/A document View SEC filing for 10-Q/A 10-Q/A 08 Nov 2013 30 Sep 2013 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Oct 2013 30 Sep 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 24 Oct 2013 24 Oct 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY 8-K 10-4-2013 07 Oct 2013 04 Oct 2013 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Aug 2013 30 Jun 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 8-1-2013 01 Aug 2013 01 Aug 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 5-31-2013 31 May 2013 31 May 2013 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY - WISCONSIN 10-Q 3-31-2013 06 May 2013 31 Mar 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 5-2-2013 02 May 2013 02 May 2013 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K NORTHERN STATES POWER COMPANY - WISCONSIN 10-K 12-31-2012 25 Feb 2013 31 Dec 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 1-31-2013 31 Jan 2013 31 Jan 2013 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 12-14-2012 19 Dec 2012 14 Dec 2012 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY- WISCONSIN 10-Q 9-30-2012 29 Oct 2012 30 Sep 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 10-25-2012 25 Oct 2012 25 Oct 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY - (WISCONSIN) 8-K 10-10-2012 10 Oct 2012 10 Oct 2012 001-03140
424B2 Open 424B2 document View SEC filing for 424B2 NORTHERN STATES POWER CO WI 424B2 10-3-2012 03 Oct 2012 333-182404
FWP Open FWP document View SEC filing for FWP NORTHERN STATES POWER COMPANY - WI FWP 10-2-2012 02 Oct 2012 333-182404
424B5 Open 424B5 document View SEC filing for 424B5 NORTHERN STATES POWER CO WI 424B5 10-2-2012 02 Oct 2012 333-182404
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY 10-Q 6-30-2012 06 Aug 2012 30 Jun 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY 8-K 7-27-2012 02 Aug 2012 27 Jul 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 8-2-2012 02 Aug 2012 02 Aug 2012 001-03140
EFFECT Open EFFECT document View SEC filing for EFFECT 11 Jul 2012 333-182404
S-3 Open S-3 document View SEC filing for S-3 NORTHERN STATES POWER COMPANY - WI S-3 6-28-2012 28 Jun 2012 333-182404
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 6-19-2012 21 Jun 2012 19 Jun 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 6-1-2012 04 Jun 2012 01 Jun 2012 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER CO WI 10-Q 3-31-2012 30 Apr 2012 31 Mar 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 4-26-2012 26 Apr 2012 26 Apr 2012 001-03140
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K NORTHERN STATES POWER COMPANY 10-K 12-31-2011 27 Feb 2012 31 Dec 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 2-2-2012 02 Feb 2012 02 Feb 2012 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 12-08-2011 16 Dec 2011 08 Dec 2011 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER - WISCONSIN 10-Q 9-30-2011 31 Oct 2011 30 Sep 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 10-27-2011 27 Oct 2011 27 Oct 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 10-7-2011 13 Oct 2011 07 Oct 2011 001-03140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY - WISCONSIN 10-Q 6-30-2011 01 Aug 2011 30 Jun 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 7-28-2011 28 Jul 2011 28 Jul 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY - WISCONSIN 8-K 6-17-2011 21 Jun 2011 17 Jun 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 6-1-2011 02 Jun 2011 01 Jun 2011 001-03140
10-Q Open 10-Q document View SEC filing for 10-Q NORTHERN STATES POWER COMPANY - WISCONSIN 10-Q 3-31-2011 02 May 2011 31 Mar 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 4-28-2011 28 Apr 2011 28 Apr 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY - WISCONSIN 8-K 3-17-2011 23 Mar 2011 17 Mar 2011 001-03140
10-K Open 10-K document View SEC filing for 10-K NORTHERN STATES POWER COMPANY 10-K 12-31-2010 28 Feb 2011 31 Dec 2010 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 1-27-2011 27 Jan 2011 27 Jan 2011 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 11-05-2010 12 Nov 2010 05 Nov 2010 001-03140
10-Q Open 10-Q document View SEC filing for 10-Q NORTHERN SATES POWER COMPANY WI 10-Q 9-30-2010 01 Nov 2010 30 Sep 2010 001-03140
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 10-28-2010 28 Oct 2010 28 Oct 2010 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Aug 2010 02 Aug 2010 001-03140
10-Q Open 10-Q document View SEC filing for 10-Q 10-Q 30 Jul 2010 30 Jun 2010 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Jul 2010 29 Jul 2010 001-03140
10-Q Open 10-Q document View SEC filing for 10-Q 10-Q 03 May 2010 31 Mar 2010 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Apr 2010 29 Apr 2010 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 31 Mar 2010 31 Mar 2010 001-03140
10-K Open 10-K document View SEC filing for 10-K 10-K 01 Mar 2010 31 Dec 2009 001-03140
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Jan 2010 28 Jan 2010 001-03140

About this filer

NORTHERN STATES POWER CO /WI/ files with the SEC under CIK 0000072909. This page aggregates EDGAR filings and related ownership activity.

Industry: Electric & Other Services Combined.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.

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