# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000067716-21-000007
Filing Date
2021-02-19
Accepted
2021-02-19 09:01:54
Documents
173
Period of Report
2020-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | mdu-20201231.htm iXBRL | 10-K | 5721982
2 | MDU RESOURCES WBI AMENDED AND RESTATED NOTE PURCHASE AGREEMENT 09-12-2013 | a2020ex4h.htm | EX-4.H | 379641
3 | MDU RESOURCES WBI FIRST AMENDED AND RESTATED NOTE PURCHASE AGREEMENT 05-17-2016 | a2020ex4i.htm | EX-4.I | 59410
4 | MDU RESOURCES WBI SECOND AMENDED AND RESTATED NOTE PURCHASE AGREEMENT 07-26-2019 | a2020ex4j.htm | EX-4.J | 54618
5 | MDU RESOURCES EXECUTIVE INCENTIVE COMPENSATION PLAN AMENDED 11-12-2020 | a2020ex10h.htm | EX-10.H | 23967
6 | MDU RESOURCES LONG-TERM PERFORMANCE INCENTIVE PLAN | a2020ex10l.htm | EX-10.L | 68689
7 | MDU RESOURCES RESTRICTIVE STOCK UNIT AWARD AGREEMENT | a2020ex10n.htm | EX-10.N | 35820
8 | MDU RESOURCES SECTION 16 OFFICERS AND DIRECTORS | a2020ex10q.htm | EX-10.Q | 24049
9 | MDU RESOURCES NONQUALIFIED DEFINED CONTRIBUTION PLAN 11-12-20 | a2020ex10r.htm | EX-10.R | 76800
10 | MDU RESOURCES 401 K RETIREMENT PLAN AMENDMENT 12-17-20 | a2020ex10u.htm | EX-10.U | 6543
11 | MDU RESOURCES SUBSIDIARIES OF MDU RESOURCES | a2020ex21.htm | EX-21 | 49401
12 | MDU RESOURCES CONSENT OF INDEPENDENT ACCOUNTING FIRM | a2020ex23.htm | EX-23 | 2270
13 | MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER | a2020ex31a.htm | EX-31.A | 8635
14 | MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER | a2020ex31b.htm | EX-31.B | 8614
15 | MDU RESOURCES CERTIFICATION OF CEO AND CFO | a2020ex32.htm | EX-32 | 5798
16 | MDU RESOURCES MINE SAFETY DISCLOSURES | a2020ex95.htm | EX-95 | 232002
| Complete submission text file | 0000067716-21-000007.txt |  | 25584377

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
17 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20201231.xsd | EX-101.SCH | 114172
18 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20201231_cal.xml | EX-101.CAL | 152463
19 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20201231_def.xml | EX-101.DEF | 971230
20 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20201231_lab.xml | EX-101.LAB | 1417712
21 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20201231_pre.xml | EX-101.PRE | 1149041
22 | EXTRACTED XBRL INSTANCE DOCUMENT | mdu-20201231_htm.xml | XML | 5449250

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-K | Act: 34 | File No.: 001-03480 | Film No.: 21652183
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)