MDU RESOURCES GROUP INC — 424B3 Filings
9 424B3 filings on record
This page lists all 424B3 filings submitted to the SEC by MDU RESOURCES GROUP INC (MDU), sorted by most recent first. Each row links to the full filing on EdgarLookup. MDU RESOURCES GROUP INC has filed 9 424B3 documents with the SEC since 2010. To view all SEC filings by MDU RESOURCES GROUP INC, see the full filings list.
All
10-K
10-K/A
10-Q
11-K
11-K/A
15-12B
25-NSE
3
3/A
4
4/A
424B2
424B3
424B5
5
5/A
8-A12B
8-A12B/A
8-K
8-K/A
8-K12B
ARS
AW
CORRESP
DEF 14A
DEFA14A
DEFR14A
NO ACT
POS AM
POSASR
PRE 14A
PRER14A
S-3
S-3/A
S-3ASR
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13G
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 424B3 | PROSPECTUS SUPPLEMENT FOR REGISTRATION NO. 333-151215 - MDU RESOURCES GROUP, INC | 0000067716-09-000088 | Jun 19, 2009 | — |
| 424B3 | SUPPLEMENT TO PROSPECTUS | 0000898080-04-000222 | Apr 14, 2004 | — |
| 424B3 | PROSPECTUS SUPPLEMENT | 0000950120-01-000004 | Jan 8, 2001 | — |
| 424B3 | PROSPECTUS FOR MDU RESOURCES GROUP | 0000950120-00-000131 | May 25, 2000 | — |
| 424B3 | PROSPECTUS SUPPLEMENT | 0000898080-98-000282 | Nov 30, 1998 | — |
| 424B3 | PRICING SUPPLEMENT NO. 9 | 0000950120-98-000344 | Sep 16, 1998 | — |
| 424B3 | PROSPECTUS SUPPLEMENT | 0000898080-98-000140 | Jul 13, 1998 | — |
| 424B3 | PRICING SUPPLEMENT NO. 8 TO REGISTRATION STATEMENT | 0000950120-97-000265 | Sep 26, 1997 | — |
| 424B3 | PRICING SUPPLEMENT NO. 7 TO REGISTRATION STATEMENT | 0000950120-97-000264 | Sep 26, 1997 | — |