# EDGAR Filing Document

**Accession Number:** 0000067716
**File Stem:** 0000067716-23-000037
**Filing Date:** 2023-3
**Character Count:** 1211
**Document Hash:** cbd79b983de1bc9ff263be3c75249d7f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000067716-23-000037.hdr.sgml**: 20230324

**ACCESSION NUMBER**: 0000067716-23-000037

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221231

**FILED AS OF DATE**: 20230324

**DATE AS OF CHANGE**: 20230324

**EFFECTIVENESS DATE**: 20230324

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MDU RESOURCES GROUP INC
- **CENTRAL INDEX KEY:** 0000067716
- **STANDARD INDUSTRIAL CLASSIFICATION:** MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
- **IRS NUMBER:** 301133956
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-03480
- **FILM NUMBER:** 23758357

**BUSINESS ADDRESS:**
- **STREET 1:** 1200 WEST CENTURY AVENUE
- **CITY:** BISMARCK
- **STATE:** ND
- **ZIP:** 58503
- **BUSINESS PHONE:** 701-530-1000

**MAIL ADDRESS:**
- **STREET 1:** 1200 WEST CENTURY AVENUE
- **CITY:** BISMARCK
- **STATE:** ND
- **ZIP:** 58503

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MONTANA DAKOTA UTILITIES CO
- **DATE OF NAME CHANGE:** 19850429

### Attached PDF Documents

**Attachment 1:** `annualreportmdur2022.pdf`

_No text found in this document._