Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001955520-26-000003
Filing Date
2026-02-20
Accepted
2026-02-20 08:00:24
Documents
230
Period of Report
2025-12-31

Document Format Files

Seq Description Document Type Size
1 KNIFE RIVER FORM 10-K 2025 knf-20251231.htm   iXBRL 10-K 3236488
2 KNIFE RIVER CERTIFICATION OF CHIEF EXECUTIVE OFFICER a2025q4ex311.htm EX-31.1 9010
3 KNIFE RIVER CERTIFICATION OF CHIEF FINANCIAL OFFICER a2025q4ex312.htm EX-31.2 8662
4 KNIFE RIVER CERTIFICATION OF CEO AND CFO a2025q4ex32.htm EX-32 5246
5 KNIFE RIVER CORPORATION LIST OF SUBSIDIARIES a2025ex21.htm EX-21.1 36610
6 KNIFE RIVER AUDITOR CONSENT a2025ex23.htm EX-23.1 2018
7 KNIFE RIVER MINE SAFETY DISCLOSURES a2025q4ex95.htm EX-95 129904
8 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio.htm EX-10.14 27620
9 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio001.jpg GRAPHIC 244251
10 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio002.jpg GRAPHIC 268669
11 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio003.jpg GRAPHIC 225184
12 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio004.jpg GRAPHIC 245886
13 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio005.jpg GRAPHIC 283536
14 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio006.jpg GRAPHIC 282736
15 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio007.jpg GRAPHIC 243939
16 KNIFE RIVER CORPORATION DEFERRED COMPENSATION PLAN FOR DIRECTORS a1010deferredcompensatio008.jpg GRAPHIC 157771
17 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan.htm EX-10.15 216543
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31 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan014.jpg GRAPHIC 73169
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55 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan038.jpg GRAPHIC 166925
56 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan039.jpg GRAPHIC 116746
57 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan040.jpg GRAPHIC 164624
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76 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan059.jpg GRAPHIC 199293
77 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan060.jpg GRAPHIC 139841
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80 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan063.jpg GRAPHIC 141600
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86 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan069.jpg GRAPHIC 115467
87 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan070.jpg GRAPHIC 45208
88 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan071.jpg GRAPHIC 228883
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101 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan084.jpg GRAPHIC 241311
102 KNIFE RIVER 401(K) RETIREMENT PLAN a10172026krc401kplan085.jpg GRAPHIC 93083
108 KNIFE RIVER SECTION 16 OFFICERS AND DIRECTORS a2025ex1019.htm EX-10.19 20440
109 KNIFE RIVER PROPERTIES MAP knf-20251231_g1.jpg GRAPHIC 201629
110 KNIFE RIVER PERFORMANCE GRAPH knf-20251231_g2.jpg GRAPHIC 189774
  Complete submission text file 0001955520-26-000003.txt   39492403

Data Files

Seq Description Document Type Size
103 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT knf-20251231.xsd EX-101.SCH 99711
104 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT knf-20251231_cal.xml EX-101.CAL 171776
105 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT knf-20251231_def.xml EX-101.DEF 491695
106 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT knf-20251231_lab.xml EX-101.LAB 1175919
107 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT knf-20251231_pre.xml EX-101.PRE 847181
233 EXTRACTED XBRL INSTANCE DOCUMENT knf-20251231_htm.xml XML 3043106
Mailing Address 1150 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1150 W. CENTURY AVE, BISMARCK ND 58503 701-530-1400
Knife River Corp (Filer) CIK: 0001955520 (see all company filings)

EIN.: 921008893 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-41642 | Film No.: 26656714
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)
(CF Office: 01 Energy & Transportation)