# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-21-000043
Filing Date
2021-08-05
Accepted
2021-08-05 09:12:44
Documents
102
Period of Report
2021-06-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES FORM 10-Q 6-30-2021 | mdu-20210630.htm iXBRL | 10-Q | 3324910
2 | MDU RESOURCES DIRECTOR COMPENSATION POLICY 5-12-21 | a2021ex10b.htm | EX-10.B | 20529
3 | MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER | a2021q2ex31a.htm | EX-31.A | 9314
4 | MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER | a2021q2ex31b.htm | EX-31.B | 8927
5 | MDU RESOURCES CERTIFICATION OF CEO AND CFO | a2021q2ex32.htm | EX-32 | 5447
6 | MDU RESOURCES MINE SAFETY DISCLOSURES | a2021q2ex95.htm | EX-95 | 109657
| Complete submission text file | 0000067716-21-000043.txt |  | 13372998

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
7 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20210630.xsd | EX-101.SCH | 55772
8 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20210630_cal.xml | EX-101.CAL | 78062
9 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20210630_def.xml | EX-101.DEF | 394508
10 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20210630_lab.xml | EX-101.LAB | 734607
11 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20210630_pre.xml | EX-101.PRE | 501757
12 | EXTRACTED XBRL INSTANCE DOCUMENT | mdu-20210630_htm.xml | XML | 3184545

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.: 211146608
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)