Filer Snapshot

Knife River Corp SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001955520.

Entity Type

Company

Total Filings

166

Latest Filing

06 Apr 2026

Industry

Mining & Quarrying Of Nonmetallic Minerals (No Fuels)

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Symbol
KNF on NYSE
Industry
Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (Office Of Energy & Transportation)
Business address
1150 W. Century Ave,, Bismarck, ND, 58503
State of incorporation
DE
Fiscal year end
31 December
Former names
Knife River Holding Co (to 01 Jun 2023)

Sponsored

Quick Takeaways

  • Knife River Corp is an SEC filer tracked under CIK 0001955520.
  • 166 filings are listed on this profile.
  • Common form coverage includes ARS, DEFA14A, DEF 14A and more.

What Changed

  • Latest filing: ARS filed on 06 Apr 2026.
  • Report period: 31 Dec 2025.

Why This Matters

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Official SEC Source

Official SEC Source

SEC EDGAR submissions for CIK 0001955520.

See Original Filing

Filer Overview

Knife River Corp has filed 166 SEC EDGAR filings since 14 Dec 2022. Common forms include ARS, DEFA14A, DEF 14A, 4 and more.

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) Insider transactions Latest 13F filings

Latest Filings

Recent SEC filings for Knife River Corp with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
ARS Open ARS document View SEC filing for ARS KRC 2025 ANNUAL REPORT 06 Apr 2026 31 Dec 2025 001-41642
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 06 Apr 2026 001-41642
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 06 Apr 2026 20 May 2026 001-41642
4 Open 4 document View SEC filing for 4 01 Apr 2026 31 Mar 2026
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 27 Mar 2026 005-94109
4 Open 4 document View SEC filing for 4 09 Mar 2026 06 Mar 2026
4 Open 4 document View SEC filing for 4 05 Mar 2026 04 Mar 2026
4 Open 4 document View SEC filing for 4 05 Mar 2026 04 Mar 2026
4 Open 4 document View SEC filing for 4 05 Mar 2026 04 Mar 2026
4 Open 4 document View SEC filing for 4 05 Mar 2026 04 Mar 2026
4 Open 4 document View SEC filing for 4 05 Mar 2026 04 Mar 2026
4 Open 4 document View SEC filing for 4 05 Mar 2026 04 Mar 2026
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K KNIFE RIVER FORM 10-K 2025 20 Feb 2026 31 Dec 2025 001-41642
4 Open 4 document View SEC filing for 4 17 Feb 2026 12 Feb 2026
4 Open 4 document View SEC filing for 4 17 Feb 2026 12 Feb 2026
4 Open 4 document View SEC filing for 4 17 Feb 2026 12 Feb 2026
4 Open 4 document View SEC filing for 4 17 Feb 2026 12 Feb 2026
4 Open 4 document View SEC filing for 4 17 Feb 2026 12 Feb 2026
4 Open 4 document View SEC filing for 4 17 Feb 2026 12 Feb 2026
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION 8-K 17 Feb 2026 17 Feb 2026 001-41642
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Nov 2025 005-94109
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 09-30-2025 05 Nov 2025 30 Sep 2025 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 04 Nov 2025 04 Nov 2025 001-41642
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Aug 2025 005-94109
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 06-30-2025 05 Aug 2025 30 Jun 2025 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 05 Aug 2025 05 Aug 2025 001-41642
11-K Open 11-K document View SEC filing for 11-K KNIFE RIVER CORPORATION FORM 11-K 12 Jun 2025 31 Dec 2024 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 May 2025 22 May 2025 001-41642
4 Open 4 document View SEC filing for 4 27 May 2025 22 May 2025
4 Open 4 document View SEC filing for 4 27 May 2025 22 May 2025
4 Open 4 document View SEC filing for 4 27 May 2025 22 May 2025
4 Open 4 document View SEC filing for 4 27 May 2025 22 May 2025
4 Open 4 document View SEC filing for 4 27 May 2025 22 May 2025
4 Open 4 document View SEC filing for 4 27 May 2025 22 May 2025
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 27 May 2025 001-41642
CORRESP Open CORRESP document View SEC filing for CORRESP 14 May 2025
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 08 May 2025 001-41642
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 03-31-2025 06 May 2025 31 Mar 2025 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 06 May 2025 06 May 2025 001-41642
3 Open 3 document View SEC filing for 3 25 Apr 2025 19 Apr 2025
ARS Open ARS document View SEC filing for ARS KRC 2024 ANNUAL REPORT 07 Apr 2025 31 Dec 2024 001-41642
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 07 Apr 2025 001-41642
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 07 Apr 2025 22 May 2025 001-41642
PRE 14A Open PRE 14A document | Open XBRL data View SEC filing for PRE 14A PRE 14A 28 Mar 2025 22 May 2025 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Mar 2025 28 Mar 2025 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Mar 2025 07 Mar 2025 001-41642
4 Open 4 document View SEC filing for 4 03 Mar 2025 28 Feb 2025
4 Open 4 document View SEC filing for 4 03 Mar 2025 27 Feb 2025
4 Open 4 document View SEC filing for 4 03 Mar 2025 27 Feb 2025
4 Open 4 document View SEC filing for 4 03 Mar 2025 27 Feb 2025
4 Open 4 document View SEC filing for 4 03 Mar 2025 27 Feb 2025
4 Open 4 document View SEC filing for 4 03 Mar 2025 27 Feb 2025
4 Open 4 document View SEC filing for 4 03 Mar 2025 27 Feb 2025
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K KNIFE RIVER FORM 10-K 2024 21 Feb 2025 31 Dec 2024 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION 8-K 13 Feb 2025 13 Feb 2025 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 17 Jan 2025 17 Jan 2025 001-41642
4 Open 4 document View SEC filing for 4 02 Jan 2025 31 Dec 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 Dec 2024 20 Dec 2024 001-41642
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 09-30-2024 04 Nov 2024 30 Sep 2024 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 04 Nov 2024 04 Nov 2024 001-41642
4 Open 4 document View SEC filing for 4 01 Oct 2024 30 Sep 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 21 Aug 2024 20 Aug 2024 001-41642
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 06-30-2024 06 Aug 2024 30 Jun 2024 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 06 Aug 2024 06 Aug 2024 001-41642
4 Open 4 document View SEC filing for 4 28 Jun 2024 27 Jun 2024
4 Open 4 document View SEC filing for 4 28 Jun 2024 28 Jun 2024
3 Open 3 document View SEC filing for 3 27 Jun 2024 27 Jun 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jun 2024 27 Jun 2024 001-41642
11-K Open 11-K document View SEC filing for 11-K KNIFE RIVER CORPORATION FORM 11-K 11 Jun 2024 31 Dec 2023 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 17 May 2024 14 May 2024 001-41642
4 Open 4 document View SEC filing for 4 16 May 2024 15 May 2024
4 Open 4 document View SEC filing for 4 16 May 2024 15 May 2024
4 Open 4 document View SEC filing for 4 16 May 2024 15 May 2024
4 Open 4 document View SEC filing for 4 16 May 2024 15 May 2024
4 Open 4 document View SEC filing for 4 16 May 2024 15 May 2024
3 Open 3 document View SEC filing for 3 15 May 2024 14 May 2024
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 03-31-2024 07 May 2024 31 Mar 2024 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 07 May 2024 07 May 2024 001-41642
4 Open 4 document View SEC filing for 4 01 Apr 2024 29 Mar 2024
ARS Open ARS document View SEC filing for ARS KRC 2023 ANNUAL REPORT 29 Mar 2024 31 Dec 2023 001-41642
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 29 Mar 2024 001-41642
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 29 Mar 2024 14 May 2024 001-41642
4 Open 4 document View SEC filing for 4 04 Mar 2024 29 Feb 2024
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K KNIFE RIVER FORM 10-K 2023 27 Feb 2024 31 Dec 2023 001-41642
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
4 Open 4 document View SEC filing for 4 26 Feb 2024 22 Feb 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 15 Feb 2024 15 Feb 2024 001-41642
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 13 Feb 2024 005-94109
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 23 Jan 2024 005-94109
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 08 Dec 2023 005-94109
4 Open 4 document View SEC filing for 4 16 Nov 2023 15 Nov 2023
4 Open 4 document View SEC filing for 4 16 Nov 2023 15 Nov 2023
4 Open 4 document View SEC filing for 4 16 Nov 2023 15 Nov 2023
4 Open 4 document View SEC filing for 4 16 Nov 2023 15 Nov 2023
4 Open 4 document View SEC filing for 4 16 Nov 2023 15 Nov 2023
4 Open 4 document View SEC filing for 4 13 Nov 2023 10 Nov 2023
424B4 Open 424B4 document View SEC filing for 424B4 424B4 08 Nov 2023 333-274692
424B3 Open 424B3 document View SEC filing for 424B3 424B3 06 Nov 2023 333-274692
424B4 Open 424B4 document View SEC filing for 424B4 424B4 06 Nov 2023 333-274692
424B3 Open 424B3 document View SEC filing for 424B3 424B3 06 Nov 2023 333-274692
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 09-30-2023 06 Nov 2023 30 Sep 2023 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 06 Nov 2023 06 Nov 2023 001-41642
EFFECT Open EFFECT document View SEC filing for EFFECT 28 Sep 2023 333-274692
S-1 Open S-1 document | Open XBRL data View SEC filing for S-1 S-1 26 Sep 2023 333-274692
DRS Open DRS document View SEC filing for DRS 01 Sep 2023 377-06850
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 06-30-2023 08 Aug 2023 30 Jun 2023 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K KNIFE RIVER CORPORATION FORM 8-K 08 Aug 2023 08 Aug 2023 001-41642
4/A Open 4/A document View SEC filing for 4/A 28 Jul 2023 12 Jul 2023
4/A Open 4/A document View SEC filing for 4/A 28 Jul 2023 12 Jul 2023
4/A Open 4/A document View SEC filing for 4/A 28 Jul 2023 12 Jul 2023
4/A Open 4/A document View SEC filing for 4/A 28 Jul 2023 12 Jul 2023
4/A Open 4/A document View SEC filing for 4/A 28 Jul 2023 12 Jul 2023
4 Open 4 document View SEC filing for 4 13 Jul 2023 12 Jul 2023
4 Open 4 document View SEC filing for 4 13 Jul 2023 12 Jul 2023
4 Open 4 document View SEC filing for 4 13 Jul 2023 12 Jul 2023
4 Open 4 document View SEC filing for 4 13 Jul 2023 12 Jul 2023
4 Open 4 document View SEC filing for 4 13 Jul 2023 12 Jul 2023
4 Open 4 document View SEC filing for 4 13 Jul 2023 12 Jul 2023
SC 13G Open SC 13G document View SEC filing for SC 13G 07 Jul 2023 005-94109
4 Open 4 document View SEC filing for 4 02 Jun 2023 31 May 2023
S-8 Open S-8 document View SEC filing for S-8 S-8 02 Jun 2023 333-272357
S-8 Open S-8 document View SEC filing for S-8 S-8 02 Jun 2023 333-272356
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
3 Open 3 document View SEC filing for 3 01 Jun 2023 31 May 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Jun 2023 30 May 2023 001-41642
3 Open 3 document View SEC filing for 3 22 May 2023 21 May 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 May 2023 18 May 2023 001-41642
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q KNIFE RIVER FORM 10-Q 03-31-2023 16 May 2023 31 Mar 2023 001-41642
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 12 May 2023 10 May 2023 001-41642
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
3 Open 3 document View SEC filing for 3 10 May 2023 10 May 2023
SEC STAFF ACTION Open SEC STAFF ACTION document View SEC filing for SEC STAFF ACTION 10 May 2023
CERT Open CERT document View SEC filing for CERT NYSE CERTIFICATION 09 May 2023 001-41642
CORRESP Open CORRESP document View SEC filing for CORRESP 08 May 2023
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 08 May 2023 001-41642
CORRESP Open CORRESP document View SEC filing for CORRESP 03 May 2023
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 03 May 2023
CORRESP Open CORRESP document View SEC filing for CORRESP 28 Apr 2023
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 28 Apr 2023 001-41642
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 17 Apr 2023
CORRESP Open CORRESP document View SEC filing for CORRESP 07 Apr 2023
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 07 Apr 2023 001-41642
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 21 Mar 2023
CORRESP Open CORRESP document View SEC filing for CORRESP 10 Mar 2023
10-12B Open 10-12B document View SEC filing for 10-12B FORM 10-12B 10 Mar 2023 001-41642
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 15 Feb 2023
DRSLTR Open DRSLTR document View SEC filing for DRSLTR 03 Feb 2023
DRS/A Open DRS/A document View SEC filing for DRS/A 03 Feb 2023 377-06503
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 13 Jan 2023
DRS Open DRS document View SEC filing for DRS 14 Dec 2022 377-06503

About this filer

Knife River Corp files with the SEC under CIK 0001955520. This page aggregates EDGAR filings and related ownership activity.

Industry: Mining & Quarrying Of Nonmetallic Minerals (No Fuels).

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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