Knife River Corp (KNF) Form 8-K Material Events
Knife River Corp (KNF) is a publicly traded company on the NYSE, categorized under SIC 1400 (Mining & Quarrying of Nonmetallic Minerals (No Fuels)). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: KNF
CIK: 1955520
Exchange: NYSE
SIC 1400: Mining & Quarrying of Nonmetallic Minerals (No Fuels)
Fiscal Year End: 12/31
State: DE
Independent PCAOB Auditor
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Audit Firm
Deloitte & Touche LLP
Auditor SinceSince 12/31/2025 12:00:00 AM
Lead Engagement PartnerChristopher Toppin
Audit LocationMinneapolis, Minnesota, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| SCHEDULE 13G/A | 2026-10-07 | — | SCHEDULE 13G/A Filing | 0000080255-26-000610 | View SEC Doc Filr Page |
| 4 | 2026-10-01 | 2026-09-30 | 4 Filing | 0001225208-26-008063 | View SEC Doc Filr Page |
| 8-K | 2026-09-23 | 2026-09-23 | KNIFE RIVER CORPORATION FORM 8-K | 0001628280-26-063145 | View SEC Doc Filr Page |
| SCHEDULE 13G/A | 2026-08-14 | — | SCHEDULE 13G/A Filing | 0000080255-26-000583 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-08-12 | — | SCHEDULE 13G Filing | 0001422849-26-000145 | View SEC Doc Filr Page |
| 10-Q | 2026-08-04 | 2026-06-30 | KNIFE RIVER FORM 10-Q 06-30-2026 | 0001628280-26-052748 | View SEC Doc Filr Page |
| 8-K | 2026-08-04 | 2026-08-04 | KNIFE RIVER CORPORATION FORM 8-K | 0001628280-26-052184 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-07-31 | — | SCHEDULE 13G Filing | 0002100121-26-000876 | View SEC Doc Filr Page |
| 4 | 2026-07-01 | 2026-06-30 | 4 Filing | 0001225208-26-006292 | View SEC Doc Filr Page |
| 11-K | 2026-06-17 | 2025-12-31 | KNIFE RIVER CORPORATION FORM 11-K | 0001628280-26-043977 | View SEC Doc Filr Page |
| 4 | 2026-05-21 | 2026-05-20 | 4 Filing | 0001225208-26-005542 | View SEC Doc Filr Page |
| 4 | 2026-05-21 | 2026-05-20 | 4 Filing | 0001225208-26-005541 | View SEC Doc Filr Page |
| 4 | 2026-05-21 | 2026-05-20 | 4 Filing | 0001225208-26-005540 | View SEC Doc Filr Page |
| 4 | 2026-05-21 | 2026-05-20 | 4 Filing | 0001225208-26-005539 | View SEC Doc Filr Page |
| 4 | 2026-05-21 | 2026-05-20 | 4 Filing | 0001225208-26-005538 | View SEC Doc Filr Page |
| 4 | 2026-05-21 | 2026-05-20 | 4 Filing | 0001225208-26-005537 | View SEC Doc Filr Page |
| 3 | 2026-05-21 | 2026-05-21 | 3 Filing | 0001225208-26-005536 | View SEC Doc Filr Page |
| 8-K | 2026-05-21 | 2026-05-20 | 8-K | 0001628280-26-037338 | View SEC Doc Filr Page |
| 8-K | 2026-05-18 | 2026-05-15 | 8-K | 0001628280-26-036006 | View SEC Doc Filr Page |
| SCHEDULE 13G/A | 2026-05-15 | — | SCHEDULE 13G/A Filing | 0000080255-26-000430 | View SEC Doc Filr Page |
| 10-Q | 2026-05-05 | 2026-03-31 | KNIFE RIVER FORM 10-Q 03-31-2026 | 0001628280-26-030688 | View SEC Doc Filr Page |
| 8-K | 2026-05-05 | 2026-05-05 | KNIFE RIVER CORPORATION 8-K | 0001628280-26-030137 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-04-30 | — | SCHEDULE 13G Filing | 0002100119-26-000701 | View SEC Doc Filr Page |
| ARS | 2026-04-06 | 2025-12-31 | KRC 2025 ANNUAL REPORT | 0001628280-26-023786 | View SEC Doc Filr Page |
| DEFA14A | 2026-04-06 | — | DEFA14A | 0001628280-26-023785 | View SEC Doc Filr Page |