# Filing Detail

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
18 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan001.jpg | GRAPHIC | 29838
19 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan002.jpg | GRAPHIC | 184159
20 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan003.jpg | GRAPHIC | 176047
21 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan004.jpg | GRAPHIC | 67748
22 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan005.jpg | GRAPHIC | 143872
23 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan006.jpg | GRAPHIC | 179108
24 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan007.jpg | GRAPHIC | 185939
25 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan008.jpg | GRAPHIC | 210012
26 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan009.jpg | GRAPHIC | 183417
27 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan010.jpg | GRAPHIC | 198451
28 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan011.jpg | GRAPHIC | 150078
29 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan012.jpg | GRAPHIC | 53699
30 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan013.jpg | GRAPHIC | 150215
31 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan014.jpg | GRAPHIC | 73169
32 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan015.jpg | GRAPHIC | 160276
33 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan016.jpg | GRAPHIC | 179515
34 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan017.jpg | GRAPHIC | 196642
35 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan018.jpg | GRAPHIC | 180611
36 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan019.jpg | GRAPHIC | 171060
37 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan020.jpg | GRAPHIC | 182606
38 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan021.jpg | GRAPHIC | 169603
39 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan022.jpg | GRAPHIC | 177161
40 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan023.jpg | GRAPHIC | 181087
41 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan024.jpg | GRAPHIC | 181074
42 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan025.jpg | GRAPHIC | 197975
43 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan026.jpg | GRAPHIC | 201539
44 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan027.jpg | GRAPHIC | 33123
45 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan028.jpg | GRAPHIC | 165354
46 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan029.jpg | GRAPHIC | 165035
47 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan030.jpg | GRAPHIC | 136667
48 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan031.jpg | GRAPHIC | 150424
49 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan032.jpg | GRAPHIC | 158277
50 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan033.jpg | GRAPHIC | 170470
51 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan034.jpg | GRAPHIC | 162226
52 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan035.jpg | GRAPHIC | 160140
53 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan036.jpg | GRAPHIC | 203128
54 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan037.jpg | GRAPHIC | 170966
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
58 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan041.jpg | GRAPHIC | 150337
59 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan042.jpg | GRAPHIC | 151567
60 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan043.jpg | GRAPHIC | 155855
61 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan044.jpg | GRAPHIC | 151956
62 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan045.jpg | GRAPHIC | 158708
63 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan046.jpg | GRAPHIC | 151958
64 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan047.jpg | GRAPHIC | 165534
65 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan048.jpg | GRAPHIC | 155245
66 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan049.jpg | GRAPHIC | 168396
67 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan050.jpg | GRAPHIC | 184181
68 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan051.jpg | GRAPHIC | 153735
69 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan052.jpg | GRAPHIC | 168232
70 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan053.jpg | GRAPHIC | 166701
71 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan054.jpg | GRAPHIC | 166124
72 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan055.jpg | GRAPHIC | 198745
73 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan056.jpg | GRAPHIC | 82767
74 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan057.jpg | GRAPHIC | 167465
75 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan058.jpg | GRAPHIC | 178616
76 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan059.jpg | GRAPHIC | 199293
77 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan060.jpg | GRAPHIC | 139841
78 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan061.jpg | GRAPHIC | 130973
79 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan062.jpg | GRAPHIC | 157729
80 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan063.jpg | GRAPHIC | 141600
81 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan064.jpg | GRAPHIC | 88742
82 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan065.jpg | GRAPHIC | 185501
83 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan066.jpg | GRAPHIC | 94648
84 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan067.jpg | GRAPHIC | 179540
85 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan068.jpg | GRAPHIC | 66930
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
89 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan072.jpg | GRAPHIC | 309943
90 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan073.jpg | GRAPHIC | 150743
91 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan074.jpg | GRAPHIC | 220240
92 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan075.jpg | GRAPHIC | 213253
93 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan076.jpg | GRAPHIC | 235709
94 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan077.jpg | GRAPHIC | 254275
95 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan078.jpg | GRAPHIC | 53095
96 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan079.jpg | GRAPHIC | 266495
97 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan080.jpg | GRAPHIC | 201893
98 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan081.jpg | GRAPHIC | 277523
99 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan082.jpg | GRAPHIC | 86666
100 | KNIFE RIVER 401(K) RETIREMENT PLAN | a10172026krc401kplan083.jpg | GRAPHIC | 220996
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)