Form SD - Specialized disclosure report:
SEC Accession No. 0000067716-23-000072
Filing Date
2023-05-24
Accepted
2023-05-24 15:33:01
Documents
2

Document Format Files

Seq Description Document Type Size
1 SD a2023formsd.htm SD 15176
2 EX-1.01 a2023ex1-01conflictmineral.htm EX-1.01 331883
  Complete submission text file 0000067716-23-000072.txt   348240
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: SD | Act: 34 | File No.: 001-03480 | Film No.: 23953775
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)