EDGAR Filing Documents for 0000067716-22-000038

Form SD - Specialized disclosure report:

SEC Accession No. 0000067716-22-000038

Filing Date

2022-05-25

Accepted

2022-05-25 14:37:23

Documents

Document Format Files

Seq	Description	Document	Type	Size
1	SD	a2022formsd.htm	SD	15176
2	EX-1.01	a2022ex1-01conflictmineral.htm	EX-1.01	321775
	Complete submission text file	0000067716-22-000038.txt		338132

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)

IRS No.: 301133956 | Fiscal Year End: 1231
Type: SD | Act: 34 | File No.: 001-03480 | Film No.: 22962039
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)