NORTHERN STATES POWER CO SEC EDGAR Filings (CIK 0001123852)

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

Industry
Electric & Other Services Combined (Office Of Energy & Transportation)
Business address
414 Nicollet Mall, Minneapolis, MN, 55401
State of incorporation
MN
Fiscal year end
31 December
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NORTHERN STATES POWER CO has filed 392 SEC EDGAR filings since 05 Oct 2000

Latest Filings

Recent SEC filings for NORTHERN STATES POWER CO including 424B2, FWP, 424B5 and more.

Form type Document Filing Description Filing date Reporting date File number(s)
424B2 Open 424B2 document | Open XBRL data View SEC filing for 424B2 424B2 06 Mar 2026 333-278797-04
FWP Open FWP document View SEC filing for FWP FWP 05 Mar 2026 333-278797-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 05 Mar 2026 333-278797-04
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 25 Feb 2026 31 Dec 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Feb 2026 05 Feb 2026 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 30 Oct 2025 30 Sep 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Oct 2025 30 Oct 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Aug 2025 22 Aug 2025 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Jul 2025 30 Jun 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Jul 2025 31 Jul 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Jun 2025 30 Jun 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 May 2025 06 May 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 May 2025 05 May 2025 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 30 Apr 2025 333-278797-04
FWP Open FWP document View SEC filing for FWP FWP 28 Apr 2025 333-278797-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 28 Apr 2025 333-278797-04
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 24 Apr 2025 31 Mar 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 24 Apr 2025 24 Apr 2025 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 27 Feb 2025 31 Dec 2024 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 21 Feb 2025 20 Feb 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Feb 2025 06 Feb 2025 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Dec 2024 02 Dec 2024 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Oct 2024 30 Sep 2024 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Oct 2024 31 Oct 2024 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2024 30 Jun 2024 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2024 01 Aug 2024 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 Jun 2024 26 Jun 2024 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 25 Apr 2024 31 Mar 2024 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Apr 2024 25 Apr 2024 001-31387
S-3ASR Open S-3ASR document View SEC filing for S-3ASR FORM S-3ASR 18 Apr 2024 333-278797-04
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Feb 2024 29 Feb 2024 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 23 Feb 2024 333-255446-04
FWP Open FWP document View SEC filing for FWP FWP 22 Feb 2024 333-255446-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 22 Feb 2024 333-255446-04
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 21 Feb 2024 31 Dec 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Jan 2024 25 Jan 2024 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Nov 2023 01 Nov 2023 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Oct 2023 30 Sep 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Oct 2023 27 Oct 2023 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Jul 2023 30 Jun 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jul 2023 27 Jul 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Jun 2023 01 Jun 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 May 2023 24 May 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 08 May 2023 08 May 2023 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 02 May 2023 333-255446-04
FWP Open FWP document View SEC filing for FWP FWP 01 May 2023 333-255446-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 01 May 2023 333-255446-04
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Apr 2023 31 Mar 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Apr 2023 27 Apr 2023 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Apr 2023 31 Mar 2023 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 23 Feb 2023 31 Dec 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 Jan 2023 26 Jan 2023 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Oct 2022 30 Sep 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Oct 2022 27 Oct 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Oct 2022 03 Oct 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 21 Sep 2022 19 Sep 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Sep 2022 30 Aug 2022 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Jul 2022 30 Jun 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Jul 2022 28 Jul 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Jul 2022 30 Jun 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 May 2022 09 May 2022 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 03 May 2022 333-255446-04
FWP Open FWP document View SEC filing for FWP FWP 02 May 2022 333-255446-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 02 May 2022 333-255446-04
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Apr 2022 31 Mar 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Apr 2022 28 Apr 2022 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 23 Feb 2022 31 Dec 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jan 2022 27 Jan 2022 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Dec 2021 21 Dec 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Dec 2021 09 Dec 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Nov 2021 01 Nov 2021 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Oct 2021 30 Sep 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Oct 2021 28 Oct 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Oct 2021 25 Oct 2021 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Jul 2021 30 Jun 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Jul 2021 01 Jul 2021 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Apr 2021 31 Mar 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Apr 2021 29 Apr 2021 001-31387
S-3ASR Open S-3ASR document View SEC filing for S-3ASR FORM S-3ASR 22 Apr 2021 333-255446-04
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Mar 2021 30 Mar 2021 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 24 Mar 2021 333-224333-04
FWP Open FWP document View SEC filing for FWP FWP 23 Mar 2021 333-224333-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 23 Mar 2021 333-224333-04
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 17 Feb 2021 31 Dec 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Jan 2021 28 Jan 2021 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Dec 2020 23 Dec 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Dec 2020 17 Dec 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 Nov 2020 06 Nov 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Nov 2020 02 Nov 2020 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Oct 2020 30 Sep 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Oct 2020 29 Oct 2020 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Jul 2020 30 Jun 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Jul 2020 30 Jul 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Jun 2020 15 Jun 2020 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 09 Jun 2020 333-224333-04
FWP Open FWP document View SEC filing for FWP FWP 08 Jun 2020 333-224333-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 08 Jun 2020 333-224333-04
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 May 2020 31 Mar 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 May 2020 07 May 2020 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 21 Feb 2020 31 Dec 2019 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Jan 2020 30 Jan 2020 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Nov 2019 31 Oct 2019 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 25 Oct 2019 30 Sep 2019 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 24 Oct 2019 24 Oct 2019 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Sep 2019 27 Sep 2019 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Sep 2019 10 Sep 2019 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 04 Sep 2019 333-224333-04
FWP Open FWP document View SEC filing for FWP FWP 03 Sep 2019 333-224333-04
424B5 Open 424B5 document View SEC filing for 424B5 424B5 03 Sep 2019 333-224333-04
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Aug 2019 30 Aug 2019 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2019 30 Jun 2019 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2019 01 Aug 2019 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 10 Jun 2019 07 Jun 2019 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 26 Apr 2019 31 Mar 2019 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Apr 2019 25 Apr 2019 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 22 Feb 2019 31 Dec 2018 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 31 Jan 2019 31 Jan 2019 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Nov 2018 06 Nov 2018 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 26 Oct 2018 30 Sep 2018 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Oct 2018 25 Oct 2018 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Jul 2018 30 Jun 2018 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Jul 2018 26 Jul 2018 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Apr 2018 31 Mar 2018 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Apr 2018 26 Apr 2018 001-31387
S-3ASR Open S-3ASR document View SEC filing for S-3ASR FORM S-3ASR 18 Apr 2018 333-224333-04
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 26 Feb 2018 31 Dec 2017 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 07 Feb 2018 07 Feb 2018 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 27 Oct 2017 30 Sep 2017 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Oct 2017 26 Oct 2017 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 13 Sep 2017 13 Sep 2017 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 DEFINITIVE PROSPECTUS SUPPLEMENT 08 Sep 2017 333-203664-01
FWP Open FWP document View SEC filing for FWP FWP 06 Sep 2017 333-203664-01
424B5 Open 424B5 document View SEC filing for 424B5 PRELIMINARY PROSPECTUS SUPPLEMENT 06 Sep 2017 333-203664-01
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Jul 2017 30 Jun 2017 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jul 2017 27 Jul 2017 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 12 May 2017 12 May 2017 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Apr 2017 31 Mar 2017 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 27 Apr 2017 27 Apr 2017 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Mar 2017 03 Mar 2017 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 24 Feb 2017 31 Dec 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 02 Feb 2017 02 Feb 2017 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Oct 2016 30 Sep 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 27 Oct 2016 27 Oct 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Aug 2016 16 Aug 2016 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Aug 2016 30 Jun 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Aug 2016 03 Aug 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 22 Jun 2016 22 Jun 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 17 Jun 2016 17 Jun 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 31 May 2016 31 May 2016 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 DEFINITIVE PROSPECTUS SUPPLEMENT 24 May 2016 333-203664-01
FWP Open FWP document View SEC filing for FWP FWP 23 May 2016 333-203664-01
424B5 Open 424B5 document View SEC filing for 424B5 PRELIMINARY PROSPECTUS SUPPLEMENT 23 May 2016 333-203664-01
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 May 2016 31 Mar 2016 001-31387
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 May 2016 09 May 2016 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 22 Feb 2016 31 Dec 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Jan 2016 28 Jan 2016 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 02 Nov 2015 02 Nov 2015 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 30 Oct 2015 30 Sep 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Oct 2015 29 Oct 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Oct 2015 02 Oct 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 11 Aug 2015 11 Aug 2015 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 DEFINITIVE PROSPECTUS SUPPLEMENT 05 Aug 2015 333-203664-01
FWP Open FWP document View SEC filing for FWP FREE WRITING PROSPECTUS 04 Aug 2015 333-203664-01
424B5 Open 424B5 document View SEC filing for 424B5 PRELIMINARY PROSPECTUS SUPPLEMENT 04 Aug 2015 333-203664-01
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Aug 2015 30 Jun 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Jul 2015 30 Jul 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 13 Jul 2015 09 Jul 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 15 Jun 2015 15 Jun 2015 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 May 2015 31 Mar 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Apr 2015 30 Apr 2015 001-31387
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3ASR 27 Apr 2015 333-203664-01
8-K Open 8-K document View SEC filing for 8-K NSPM RATE CASE 30 Mar 2015 26 Mar 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Mar 2015 06 Mar 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Mar 2015 06 Mar 2015 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 20 Feb 2015 31 Dec 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K NSP MONTI PRUDENCE REVIEW ALJ REPORT 03 Feb 2015 02 Feb 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Jan 2015 29 Jan 2015 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Dec 2014 26 Dec 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Nov 2014 21 Nov 2014 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Oct 2014 30 Sep 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Oct 2014 30 Oct 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 17 Oct 2014 14 Oct 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 27 Aug 2014 26 Aug 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 21 Aug 2014 15 Aug 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Aug 2014 04 Aug 2014 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2014 30 Jun 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 31 Jul 2014 31 Jul 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 07 Jul 2014 07 Jul 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Jul 2014 02 Jul 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 23 Jun 2014 23 Jun 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Jun 2014 05 Jun 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 13 May 2014 13 May 2014 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 NORTHERN STATES POWER COMPANY MN 424B2 5-6-2014 07 May 2014 333-192845
FWP Open FWP document View SEC filing for FWP NORTHERN STATES POWER COMPANY MN FWP 5-6-2014 06 May 2014 333-192845
424B5 Open 424B5 document View SEC filing for 424B5 NORTHERN STATES POWER COMPANY MN 424B5 5-6-2014 06 May 2014 333-192845
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 May 2014 31 Mar 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 01 May 2014 01 May 2014 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 24 Feb 2014 31 Dec 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Jan 2014 30 Jan 2014 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Dec 2013 16 Dec 2013 001-31387
S-3ASR Open S-3ASR document View SEC filing for S-3ASR NORTHERN STATES POWER COMPANY MN S-3ASR 12-13-2013 13 Dec 2013 333-192845
10-Q/A Open 10-Q/A document View SEC filing for 10-Q/A 10-Q/A 08 Nov 2013 30 Sep 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Nov 2013 04 Nov 2013 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Oct 2013 30 Sep 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 24 Oct 2013 24 Oct 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY, INC 8-K 8-8-2013 09 Aug 2013 08 Aug 2013 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Aug 2013 30 Jun 2013 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 7-17-2013 19 Jul 2013 17 Jul 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 7-3-2013 08 Jul 2013 03 Jul 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY MN 8-K 5-20-2013 20 May 2013 20 May 2013 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 NORTHERN STATES POWER COMPANY MN 424B2 5-13-2013 14 May 2013 333-182331
FWP Open FWP document View SEC filing for FWP NORTHERN STATES POWER CO MN FWP 5-13-2013 13 May 2013 333-182331
424B5 Open 424B5 document View SEC filing for 424B5 NORTHERN STATES POWER COMPANY - MN 424B5 5-13-2013 13 May 2013 333-182331
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY MINNESOTA 10-Q 3-31-2013 06 May 2013 31 Mar 2013 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 4-12-2013 15 Apr 2013 12 Apr 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 3-25-2013 25 Mar 2013 25 Mar 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 3-15-2013 19 Mar 2013 15 Mar 2013 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 2-28-2103 01 Mar 2013 28 Feb 2013 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K NORTHERN STATES POWER COMPANY 10-K 12-31-2012 25 Feb 2013 31 Dec 2012 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 12-18-2012 18 Dec 2012 18 Dec 2012 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 12-13-2012 17 Dec 2012 13 Dec 2012 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 11-1-2012 02 Nov 2012 01 Nov 2012 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY 10-Q 9-30-2012 26 Oct 2012 30 Sep 2012 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY MN 8-K 8-13-2012 13 Aug 2012 13 Aug 2012 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 NORTHERN STATES POWER COMPANY - MN 424B2 8-6-2012 07 Aug 2012 333-182331
FWP Open FWP document View SEC filing for FWP NORTHERN STATES POWER CO - MINNESOTA FWP 8-6-2012 06 Aug 2012 333-182331
424B5 Open 424B5 document View SEC filing for 424B5 NORTHERN STATES POWER COMPANY - MN 424B5 8-6-2012 06 Aug 2012 333-182331
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER CO MN 10-Q 6-30-2012 03 Aug 2012 30 Jun 2012 001-31387
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 001-31387
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 001-31387
EFFECT Open EFFECT document View SEC filing for EFFECT 09 Jul 2012 333-182331
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 6-29-2012 29 Jun 2012 29 Jun 2012 001-31387
S-3 Open S-3 document View SEC filing for S-3 NORTHERN STATES POWER COMPANY S-3 6-25-2012 25 Jun 2012 333-182331
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 6-7-2012 08 Jun 2012 07 Jun 2012 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER CO MN 10-Q 3-31-2012 30 Apr 2012 31 Mar 2012 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 3-29-2012 03 Apr 2012 29 Mar 2012 001-31387
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY - MINNESOTA 8-K 2-29-2012 02 Mar 2012 29 Feb 2012 001-31387
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K NORTHERN STATES POWER CO 10-K 12-31-2011 27 Feb 2012 31 Dec 2011 001-31387
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 001-31387
15-12G Open 15-12G document View SEC filing for 15-12G NORTHERN STATES POWER COMPANY (MN) 15-12G 12-21-2011 21 Dec 2011 000-31709
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY - MINNESOTA 8-K 11-14-2011 14 Nov 2011 14 Nov 2011 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY MN 10-Q 9-30-2011 28 Oct 2011 30 Sep 2011 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATE POWER COMPANY 8-K 9-15-2011 20 Sep 2011 15 Sep 2011 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 8-18-2011 26 Aug 2011 18 Aug 2011 001-31387
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q NORTHERN STATES POWER COMPANY - MINNESOTA 10-Q 6-30-2011 01 Aug 2011 30 Jun 2011 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 6-30-2011 01 Jul 2011 30 Jun 2011 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 6-10-2011 14 Jun 2011 10 Jun 2011 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 5-4-2011 05 May 2011 04 May 2011 001-31387
10-Q Open 10-Q document View SEC filing for 10-Q NORTHERN STATES POWER CO 10-Q 3-31-2011 29 Apr 2011 31 Mar 2011 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 4-5-2011 06 Apr 2011 05 Apr 2011 001-31387
8-K Open 8-K document View SEC filing for 8-K NORTHERN STATES POWER COMPANY 8-K 3-17-2011 23 Mar 2011 17 Mar 2011 001-31387
10-K Open 10-K document View SEC filing for 10-K NORTHERN STATES POWER COMPANY 10K 12-31-2010 28 Feb 2011 31 Dec 2010 001-31387
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 001-31387
S-3ASR Open S-3ASR document View SEC filing for S-3ASR NORTHERN STATES POWER S-3ASR 1-14-2011 14 Jan 2011 333-171732
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY INC 8-K 12-16-2010 21 Dec 2010 16 Dec 2010 001-31387
8-K Open 8-K document View SEC filing for 8-K XCEL ENERGY 8-K 11-3-2010 04 Nov 2010 03 Nov 2010 001-31387
10-Q Open 10-Q document View SEC filing for 10-Q NORTHERN STATES POWER COMPANY 10-Q 9-30-2010 01 Nov 2010 30 Sep 2010 001-31387
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 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 11 Aug 2010 04 Aug 2010 001-31387
424B2 Open 424B2 document View SEC filing for 424B2 424B2 06 Aug 2010 333-147958
FWP Open FWP document View SEC filing for FWP FWP 04 Aug 2010 333-147958
424B5 Open 424B5 document View SEC filing for 424B5 424B5 04 Aug 2010 333-147958
10-Q Open 10-Q document View SEC filing for 10-Q 10-Q 30 Jul 2010 30 Jun 2010 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Jul 2010 29 Jul 2010 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 13 May 2010 03 May 2010 001-31387
10-Q Open 10-Q document View SEC filing for 10-Q 10-Q 03 May 2010 31 Mar 2010 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Apr 2010 29 Apr 2010 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 31 Mar 2010 31 Mar 2010 001-31387
10-K Open 10-K document View SEC filing for 10-K 10-K 01 Mar 2010 31 Dec 2009 001-31387
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Jan 2010 28 Jan 2010 001-31387

About this filer

NORTHERN STATES POWER CO files with the SEC under CIK 0001123852. 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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