# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-25-000090
Filing Date
2025-11-10
Accepted
2025-11-10 08:31:45
Documents
145
Period of Report
2025-09-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES FORM 10-Q | mdu-20250930.htm iXBRL | 10-Q | 2416230
2 | INTERMOUNTAIN NOTE PURCHASE AGREEMENT | executednotepurchaseagre.htm | EX-4.A | 177586
3 | CERTIFICATION OF CHIEF EXECUTIVE OFFICER | a2025q3ex31a.htm | EX-31.A | 9049
4 | CERTIFICATION OF CHIEF FINANCIAL OFFICER | a2025q3ex31b.htm | EX-31.B | 8642
5 | CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER | a2025q3ex32.htm | EX-32 | 5267
11 |  | executednotepurchaseagre001.jpg | GRAPHIC | 40676
12 |  | executednotepurchaseagre002.jpg | GRAPHIC | 187816
13 |  | executednotepurchaseagre003.jpg | GRAPHIC | 210158
14 |  | executednotepurchaseagre004.jpg | GRAPHIC | 164079
15 |  | executednotepurchaseagre005.jpg | GRAPHIC | 61033
16 |  | executednotepurchaseagre006.jpg | GRAPHIC | 85046
17 |  | executednotepurchaseagre007.jpg | GRAPHIC | 176374
18 |  | executednotepurchaseagre008.jpg | GRAPHIC | 267883
19 |  | executednotepurchaseagre009.jpg | GRAPHIC | 271824
20 |  | executednotepurchaseagre010.jpg | GRAPHIC | 264624
21 |  | executednotepurchaseagre011.jpg | GRAPHIC | 289060
22 |  | executednotepurchaseagre012.jpg | GRAPHIC | 271842
23 |  | executednotepurchaseagre013.jpg | GRAPHIC | 262452
24 |  | executednotepurchaseagre014.jpg | GRAPHIC | 252081
25 |  | executednotepurchaseagre015.jpg | GRAPHIC | 230820
26 |  | executednotepurchaseagre016.jpg | GRAPHIC | 283679
27 |  | executednotepurchaseagre017.jpg | GRAPHIC | 233685
28 |  | executednotepurchaseagre018.jpg | GRAPHIC | 273563
29 |  | executednotepurchaseagre019.jpg | GRAPHIC | 305471
30 |  | executednotepurchaseagre020.jpg | GRAPHIC | 248972
31 |  | executednotepurchaseagre021.jpg | GRAPHIC | 282375
32 |  | executednotepurchaseagre022.jpg | GRAPHIC | 242254
33 |  | executednotepurchaseagre023.jpg | GRAPHIC | 275758
34 |  | executednotepurchaseagre024.jpg | GRAPHIC | 275413
35 |  | executednotepurchaseagre025.jpg | GRAPHIC | 305345
36 |  | executednotepurchaseagre026.jpg | GRAPHIC | 269221
37 |  | executednotepurchaseagre027.jpg | GRAPHIC | 265629
38 |  | executednotepurchaseagre028.jpg | GRAPHIC | 267387
39 |  | executednotepurchaseagre029.jpg | GRAPHIC | 264494
40 |  | executednotepurchaseagre030.jpg | GRAPHIC | 289141
41 |  | executednotepurchaseagre031.jpg | GRAPHIC | 228847
42 |  | executednotepurchaseagre032.jpg | GRAPHIC | 249534
43 |  | executednotepurchaseagre033.jpg | GRAPHIC | 294710
44 |  | executednotepurchaseagre034.jpg | GRAPHIC | 285835
45 |  | executednotepurchaseagre035.jpg | GRAPHIC | 235971
46 |  | executednotepurchaseagre036.jpg | GRAPHIC | 281357
47 |  | executednotepurchaseagre037.jpg | GRAPHIC | 267367
48 |  | executednotepurchaseagre038.jpg | GRAPHIC | 273577
49 |  | executednotepurchaseagre039.jpg | GRAPHIC | 302146
50 |  | executednotepurchaseagre040.jpg | GRAPHIC | 275001
51 |  | executednotepurchaseagre041.jpg | GRAPHIC | 291026
52 |  | executednotepurchaseagre042.jpg | GRAPHIC | 267259
53 |  | executednotepurchaseagre043.jpg | GRAPHIC | 248507
54 |  | executednotepurchaseagre044.jpg | GRAPHIC | 274869
55 |  | executednotepurchaseagre045.jpg | GRAPHIC | 251511
56 |  | executednotepurchaseagre046.jpg | GRAPHIC | 316217
57 |  | executednotepurchaseagre047.jpg | GRAPHIC | 279587
58 |  | executednotepurchaseagre048.jpg | GRAPHIC | 273849
59 |  | executednotepurchaseagre049.jpg | GRAPHIC | 238682
60 |  | executednotepurchaseagre050.jpg | GRAPHIC | 57581
61 |  | executednotepurchaseagre051.jpg | GRAPHIC | 46286
62 |  | executednotepurchaseagre052.jpg | GRAPHIC | 48814
| Complete submission text file | 0000067716-25-000090.txt |  | 28870671

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
6 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20250930.xsd | EX-101.SCH | 55128
7 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20250930_cal.xml | EX-101.CAL | 110235
8 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20250930_def.xml | EX-101.DEF | 317143
9 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20250930_lab.xml | EX-101.LAB | 728471
10 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20250930_pre.xml | EX-101.PRE | 548375
148 | EXTRACTED XBRL INSTANCE DOCUMENT | mdu-20250930_htm.xml | XML | 2371369

Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1000
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

EIN.: 301133956 | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 001-03480 | Film No.: 251464553
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)
(CF Office: 01 Energy & Transportation)