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Filing Detail
Form SD - Specialized disclosure report:
SEC Accession No. 0000067716-21-000033
Filing Date
2021-05-27
Accepted
2021-05-27 10:34:12
Documents
2

Document Format Files

Seq Description Document Type Size
1 SD a2021formsd.htm SD 15199
2 EX-1.01 a2021ex1-01conflictmineral.htm EX-1.01 349858
  Complete submission text file 0000067716-21-000033.txt   366238
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.: 21969431
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)