Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0000080255-13-000182
Filing Date
2013-02-07
Accepted
2013-02-07 15:22:46
Documents
1

Document Format Files

Seq Description Document Type Size
1 MDU AS OF 12/31/2012 mdu13gadec12.htm SC 13G/A 25439
  Complete submission text file 0000080255-13-000182.txt   27114
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 (Subject) CIK: 0000067716 (see all company filings)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-35797 | Film No.: 13582082
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)

Mailing Address P.O. BOX 89000 BALTIMORE MD 21289
Business Address 100 EAST PRATT ST BALTIMORE MD 21202 (410)345-6603
PRICE T ROWE ASSOCIATES INC /MD/ (Filed by) CIK: 0000080255 (see all company filings)

EIN.: 520556948 | State of Incorp.: MD | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 6200 Security & Commodity Brokers, Dealers, Exchanges & Services