Northern States Power Co /Wi/

Entity
Company
Industry
Electric & Other Services Combined (Office Of Energy & Transportation)
Business address
1414 W Hamilton Ave, 54702 Eau Claire, WI
Phone
7158392621
State of incorporation
WI
Fiscal year end
December 31
Category
Non-accelerated filer
All SEC filings
View on sec.gov
Northern States Power Co /Wi/ has filed 314 SEC EDGAR filings since 3/28/1994

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
8-K Open Document | Data Open Filing 8-K Aug 11, 2025 Aug 8, 2025 001-03140
10-Q Open Document | Data Open Filing 10-Q Jul 31, 2025 Jun 30, 2025 001-03140
8-K Open Document | Data Open Filing 8-K Jul 31, 2025 Jul 31, 2025 001-03140
8-K Open Document | Data Open Filing 8-K Jun 23, 2025 Jun 23, 2025 001-03140
424B2 Open Document Open Filing 424B2 Jun 18, 2025 333-278797-03
FWP Open Document Open Filing FWP Jun 17, 2025 333-278797-03
424B5 Open Document Open Filing 424B5 Jun 17, 2025 333-278797-03
8-K Open Document | Data Open Filing 8-K May 7, 2025 May 6, 2025 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 24, 2025 Mar 31, 2025 001-03140
8-K Open Document | Data Open Filing 8-K Apr 24, 2025 Apr 24, 2025 001-03140
8-K Open Document | Data Open Filing 8-K Apr 1, 2025 Mar 31, 2025 001-03140
10-K Open Document | Data Open Filing 10-K Feb 27, 2025 Dec 31, 2024 001-03140
8-K Open Document | Data Open Filing 8-K Feb 6, 2025 Feb 6, 2025 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 31, 2024 Sep 30, 2024 001-03140
8-K Open Document | Data Open Filing 8-K Oct 31, 2024 Oct 31, 2024 001-03140
10-Q Open Document | Data Open Filing 10-Q Aug 1, 2024 Jun 30, 2024 001-03140
8-K Open Document | Data Open Filing 8-K Aug 1, 2024 Aug 1, 2024 001-03140
8-K Open Document | Data Open Filing 8-K May 16, 2024 May 16, 2024 001-03140
424B2 Open Document Open Filing 424B2 May 14, 2024 333-278797-03
FWP Open Document Open Filing FWP May 13, 2024 333-278797-03
424B5 Open Document Open Filing 424B5 May 13, 2024 333-278797-03
10-Q Open Document | Data Open Filing 10-Q Apr 25, 2024 Mar 31, 2024 001-03140
8-K Open Document | Data Open Filing 8-K Apr 25, 2024 Apr 25, 2024 001-03140
S-3ASR Open Document Open Filing FORM S-3ASR Apr 18, 2024 333-278797-03
10-K Open Document | Data Open Filing 10-K Feb 21, 2024 Dec 31, 2023 001-03140
8-K Open Document | Data Open Filing 8-K Jan 25, 2024 Jan 25, 2024 001-03140
8-K Open Document | Data Open Filing 8-K Nov 13, 2023 Nov 9, 2023 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 27, 2023 Sep 30, 2023 001-03140
8-K Open Document | Data Open Filing 8-K Oct 27, 2023 Oct 27, 2023 001-03140
8-K Open Document | Data Open Filing 8-K Sep 1, 2023 Sep 1, 2023 001-03140
10-Q Open Document | Data Open Filing 10-Q Jul 27, 2023 Jun 30, 2023 001-03140
8-K Open Document | Data Open Filing 8-K Jul 27, 2023 Jul 27, 2023 001-03140
8-K Open Document | Data Open Filing 8-K May 10, 2023 May 10, 2023 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 27, 2023 Mar 31, 2023 001-03140
8-K Open Document | Data Open Filing 8-K Apr 27, 2023 Apr 27, 2023 001-03140
10-K Open Document | Data Open Filing 10-K Feb 23, 2023 Dec 31, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Jan 26, 2023 Jan 26, 2023 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 27, 2022 Sep 30, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Oct 27, 2022 Oct 27, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Sep 21, 2022 Sep 19, 2022 001-03140
10-Q Open Document | Data Open Filing 10-Q Jul 28, 2022 Jun 30, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Jul 28, 2022 Jul 28, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Jul 15, 2022 Jul 15, 2022 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 28, 2022 Mar 31, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Apr 28, 2022 Apr 28, 2022 001-03140
10-K Open Document | Data Open Filing 10-K Feb 23, 2022 Dec 31, 2021 001-03140
8-K Open Document | Data Open Filing 8-K Jan 27, 2022 Jan 27, 2022 001-03140
8-K Open Document | Data Open Filing 8-K Nov 18, 2021 Nov 18, 2021 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 28, 2021 Sep 30, 2021 001-03140
8-K Open Document | Data Open Filing 8-K Oct 28, 2021 Oct 28, 2021 001-03140
10-Q Open Document | Data Open Filing 10-Q Jul 29, 2021 Jun 30, 2021 001-03140
8-K Open Document | Data Open Filing 8-K Jul 20, 2021 Jul 19, 2021 001-03140
8-K Open Document | Data Open Filing 8-K Jul 2, 2021 Jul 2, 2021 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 29, 2021 Mar 31, 2021 001-03140
8-K Open Document | Data Open Filing 8-K Apr 29, 2021 Apr 29, 2021 001-03140
S-3ASR Open Document Open Filing FORM S-3ASR Apr 22, 2021 333-255446-03
10-K Open Document | Data Open Filing 10-K Feb 17, 2021 Dec 31, 2020 001-03140
8-K Open Document | Data Open Filing 8-K Jan 28, 2021 Jan 28, 2021 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 29, 2020 Sep 30, 2020 001-03140
8-K Open Document | Data Open Filing 8-K Oct 29, 2020 Oct 29, 2020 001-03140
10-Q Open Document | Data Open Filing 10-Q Jul 31, 2020 Jun 30, 2020 001-03140
8-K Open Document | Data Open Filing 8-K Jul 30, 2020 Jul 30, 2020 001-03140
8-K Open Document | Data Open Filing 8-K May 26, 2020 May 26, 2020 001-03140
424B2 Open Document Open Filing 424B2 May 19, 2020 333-224333-03
FWP Open Document Open Filing FWP May 18, 2020 333-224333-03
424B5 Open Document Open Filing 424B5 May 18, 2020 333-224333-03
10-Q Open Document | Data Open Filing 10-Q May 7, 2020 Mar 31, 2020 001-03140
8-K Open Document | Data Open Filing 8-K May 7, 2020 May 7, 2020 001-03140
10-K Open Document | Data Open Filing 10-K Feb 21, 2020 Dec 31, 2019 001-03140
8-K Open Document | Data Open Filing 8-K Jan 30, 2020 Jan 30, 2020 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 25, 2019 Sep 30, 2019 001-03140
8-K Open Document | Data Open Filing 8-K Oct 24, 2019 Oct 24, 2019 001-03140
10-Q Open Document | Data Open Filing 10-Q Aug 1, 2019 Jun 30, 2019 001-03140
8-K Open Document | Data Open Filing 8-K Aug 1, 2019 Aug 1, 2019 001-03140
8-K Open Document Open Filing 8-K Jun 10, 2019 Jun 7, 2019 001-03140
8-K Open Document Open Filing 8-K May 23, 2019 May 23, 2019 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 26, 2019 Mar 31, 2019 001-03140
8-K Open Document Open Filing 8-K Apr 25, 2019 Apr 25, 2019 001-03140
10-K Open Document | Data Open Filing 10-K Feb 22, 2019 Dec 31, 2018 001-03140
8-K Open Document Open Filing 8-K Jan 31, 2019 Jan 31, 2019 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 26, 2018 Sep 30, 2018 001-03140
8-K Open Document Open Filing 8-K Oct 25, 2018 Oct 25, 2018 001-03140
8-K Open Document Open Filing 8-K Sep 12, 2018 Sep 12, 2018 001-03140
424B2 Open Document Open Filing 424B2 Sep 6, 2018 333-224333-03
FWP Open Document Open Filing FREE WRITING PROSPECTUS Sep 5, 2018 333-224333-03
424B5 Open Document Open Filing 424B5 Sep 5, 2018 333-224333-03
10-Q Open Document | Data Open Filing 10-Q Jul 27, 2018 Jun 30, 2018 001-03140
10-K/A Open Document | Data Open Filing 10-K/A Jul 27, 2018 Dec 31, 2017 001-03140
8-K Open Document Open Filing 8-K Jul 26, 2018 Jul 26, 2018 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 27, 2018 Mar 31, 2018 001-03140
8-K Open Document Open Filing 8-K Apr 26, 2018 Apr 26, 2018 001-03140
S-3ASR Open Document Open Filing FORM S-3ASR Apr 18, 2018 333-224333-03
10-K Open Document | Data Open Filing 10-K Feb 26, 2018 Dec 31, 2017 001-03140
8-K Open Document Open Filing 8-K Feb 7, 2018 Feb 7, 2018 001-03140
8-K Open Document Open Filing 8-K Dec 22, 2017 Dec 22, 2017 001-03140
8-K Open Document Open Filing 8-K Dec 4, 2017 Dec 4, 2017 001-03140
424B2 Open Document Open Filing 424B2 Nov 28, 2017 333-203664-02
FWP Open Document Open Filing FREE WRITING PROSPECTUS Nov 27, 2017 333-203664-02
424B5 Open Document Open Filing 424B5 Nov 27, 2017 333-203664-02
10-Q Open Document | Data Open Filing 10-Q Oct 27, 2017 Sep 30, 2017 001-03140
8-K Open Document Open Filing 8-K Oct 26, 2017 Oct 26, 2017 001-03140
8-K Open Document Open Filing 8-K Sep 15, 2017 Sep 15, 2017 001-03140
10-Q Open Document | Data Open Filing 10-Q Jul 28, 2017 Jun 30, 2017 001-03140
8-K Open Document | Data Open Filing 8-K Jul 27, 2017 Jul 27, 2017 001-03140
8-K Open Document Open Filing 8-K May 5, 2017 May 5, 2017 001-03140
10-Q Open Document | Data Open Filing 10-Q Apr 28, 2017 Mar 31, 2017 001-03140
8-K Open Document Open Filing 8-K Apr 27, 2017 Apr 27, 2017 001-03140
10-K Open Document | Data Open Filing 10-K Feb 24, 2017 Dec 31, 2016 001-03140
8-K Open Document Open Filing 8-K Feb 2, 2017 Feb 2, 2017 001-03140
10-Q Open Document | Data Open Filing 10-Q Oct 31, 2016 Sep 30, 2016 001-03140
8-K Open Document Open Filing 8-K Oct 27, 2016 Oct 27, 2016 001-03140
8-K Open Document Open Filing 8-K Aug 16, 2016 Aug 16, 2016 001-03140
10-Q Open Document | Data Open Filing 10-Q Aug 4, 2016 Jun 30, 2016 001-03140
8-K Open Document Open Filing 8-K Aug 3, 2016 Aug 3, 2016 001-03140
8-K Open Document Open Filing 8-K Jun 22, 2016 Jun 22, 2016 001-03140
10-Q Open Document | Data Open Filing 10-Q May 13, 2016 Mar 31, 2016 001-03140
8-K Open Document | Data Open Filing 8-K May 9, 2016 May 9, 2016 001-03140
8-K Open Document Open Filing 8-K Apr 1, 2016 Apr 1, 2016 001-03140
10-K Open Document | Data Open Filing 10-K Feb 22, 2016 Dec 31, 2015 001-03140
8-K Open Document Open Filing 8-K Jan 28, 2016 Jan 28, 2016 001-03140
8-K Open Document Open Filing 8-K Dec 4, 2015 Dec 3, 2015 001-03140
10-Q Open Document | Data Open Filing 10-Q Nov 2, 2015 Sep 30, 2015 001-03140
8-K Open Document Open Filing 8-K Oct 29, 2015 Oct 29, 2015 001-03140
8-K Open Document Open Filing 8-K Oct 5, 2015 Oct 1, 2015 001-03140
10-Q Open Document | Data Open Filing 10-Q Aug 3, 2015 Jun 30, 2015 001-03140
8-K Open Document Open Filing 8-K Jul 30, 2015 Jul 30, 2015 001-03140
8-K Open Document Open Filing 8-K Jun 29, 2015 Jun 29, 2015 001-03140
424B2 Open Document Open Filing DEFINITIVE PROSPECTUS SUPPLEMENT Jun 23, 2015 333-203664-02
FWP Open Document Open Filing FREE WRITING PROSPECTUS Jun 22, 2015 333-203664-02
424B5 Open Document Open Filing PRELIMINARY PROSPECTUS SUPPLEMENT Jun 22, 2015 333-203664-02
8-K Open Document Open Filing 8-K May 29, 2015 May 29, 2015 001-03140
10-Q Open Document | Data Open Filing 10-Q May 4, 2015 Mar 31, 2015 001-03140
8-K Open Document Open Filing 8-K Apr 30, 2015 Apr 30, 2015 001-03140
S-3ASR Open Document Open Filing S-3ASR Apr 27, 2015 333-203664-02
10-K Open Document | Data Open Filing 10-K Feb 23, 2015 Dec 31, 2014 001-03140
8-K Open Document Open Filing 8-K Jan 29, 2015 Jan 29, 2015 001-03140
10-Q Open Document | Data Open Filing 10-Q Nov 3, 2014 Sep 30, 2014 001-03140
8-K Open Document Open Filing 8-K Oct 30, 2014 Oct 30, 2014 001-03140
8-K Open Document Open Filing 8-K Oct 17, 2014 Oct 14, 2014 001-03140
8-K Open Document Open Filing 8-K Oct 6, 2014 Oct 3, 2014 001-03140
10-Q Open Document | Data Open Filing 10-Q Aug 4, 2014 Jun 30, 2014 001-03140
8-K Open Document Open Filing 8-K Jul 31, 2014 Jul 31, 2014 001-03140
8-K Open Document Open Filing 8-K Jun 23, 2014 Jun 23, 2014 001-03140
424B2 Open Document Open Filing NORTHERN STATES POWER COMPANY WI 424B2 6-16-2014 Jun 17, 2014 333-192835
FWP Open Document Open Filing NORTHERN STATES POWER COMPANY - WI FWP 6-16-2014 Jun 16, 2014 333-192835
424B5 Open Document Open Filing NORTHERN STATES POWER COMPANY - WI 424B5 6-16-2014 Jun 16, 2014 333-192835
8-K Open Document Open Filing 8-K May 30, 2014 May 30, 2014 001-03140
10-Q Open Document | Data Open Filing 10-Q May 5, 2014 Mar 31, 2014 001-03140
8-K Open Document Open Filing 8-K May 1, 2014 May 1, 2014 001-03140
10-K Open Document | Data Open Filing 10-K Feb 24, 2014 Dec 31, 2013 001-03140
8-K Open Document Open Filing 8-K Jan 30, 2014 Jan 30, 2014 001-03140
EFFECT Open Document Open Filing Jan 7, 2014 333-192835