# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000067716-15-000027
Filing Date
2015-02-20
Accepted
2015-02-20 09:50:02
Documents
21
Period of Report
2014-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES 2014 FORM 10-K | mdu-12312014form10xk.htm | 10-K | 4594694
2 | INSTRUMENT OF AMENDMENT TO 401(K) RETIREMENT PLAN NOV. 25, 2014 | mdu-12x31x14ex10ah.htm | EX-10.AH | 15548
3 | INSTRUMENT OF AMENDMENT TO 401(K) RETIREMENT PLAN DEC. 11, 2014 | mdu-12x31x14ex10ai.htm | EX-10.AI | 44553
4 | INSTRUMENT OF AMENDMENT TO 401(K) RETIREMENT PLAN DEC. 11, 2014 | mdu-12x31x14ex10aj.htm | EX-10.AJ | 88027
5 | INSTRUMENT OF AMENDMENT TO 401(K) RETIREMENT PLAN DEC. 30, 2014 | mdu-12x31x14xex10ak.htm | EX-10.AK | 9409
6 | SECTION 16 OFFICERS AND DIRECTORS WITH INDEMNIFICATION AGREEMENTS CHART | mdu-12x31x14xex10m.htm | EX-10.M | 34967
7 | COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES | mdu-123114xex12.htm | EX-12 | 70692
8 | SUBSIDIARIES OF MDU RESOURCES GROUP, INC. | mdu-12x31x14xex21.htm | EX-21 | 49285
9 | EXHIBIT 23.A | mdu-123114xex23a.htm | EX-23.A | 3029
10 | EXHIBIT 23.B | mdu-123114xex23b.htm | EX-23.B | 11318
11 | EXHIBIT 31.A | mdu-123114xex31a.htm | EX-31.A | 10392
12 | EXHIBIT 31.B | mdu-123114xex31b.htm | EX-31.B | 10374
13 | CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER | mdu-123114xex32.htm | EX-32 | 6936
14 | MINE SAFETY DISCLOSURES | mdu-123114xex95.htm | EX-95 | 226180
15 | RYDER SCOTT COMPANY, L.P. | mdu-12x31x14xexx99a.htm | EX-99.A | 141887
| Complete submission text file | 0000067716-15-000027.txt |  | 34336585

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
16 | XBRL INSTANCE DOCUMENT | mdu-20141231.xml | EX-101.INS | 6221799
17 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20141231.xsd | EX-101.SCH | 133321
18 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20141231_cal.xml | EX-101.CAL | 196241
19 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20141231_def.xml | EX-101.DEF | 765550
20 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20141231_lab.xml | EX-101.LAB | 1796883
21 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20141231_pre.xml | EX-101.PRE | 1066315

Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1059
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-03480 | Film No.: 15634061
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)