| Filed On | Filing |
|---|---|
| 01 Apr 2026 | DEF 14A |
| 03 Apr 2025 | DEF 14A |
| 29 Mar 2024 | DEF 14A |
| 24 Mar 2023 | DEF 14A |
| 25 Mar 2022 | MDU RESOURCES GROUP, INC. 2022 PROXY STATEMENT |
| 26 Mar 2021 | MDU RESOURCES GROUP, INC. 2021 PROXY STATEMENT |
| 27 Mar 2020 | DEF 14A |
| 22 Mar 2019 | DEF 14A |
| 23 Mar 2018 | DEF 14A |
| 24 Mar 2017 | DEF 14A |
| 16 Mar 2016 | DEF 14A |
| 18 Mar 2015 | DEF 14A |
| 12 Mar 2014 | DEFINITIVE PROXY STATEMENT |
| 13 Mar 2013 | DEFINITIVE PROXY STATEMENT |
| 09 Mar 2012 | DEFINITIVE PROXY STATEMENT |
| 11 Mar 2011 | DEFINITIVE PROXY STATEMENT |
| 12 Mar 2010 | DEFINITIVE PROXY STATEMENT |
| 10 Mar 2009 | DEFINITIVE PROXY STATEMENT |
| 07 Mar 2008 | DEFINITIVE PROXY STATEMENT DATED 04-22-2008 |
| 06 Mar 2007 | DEF 14A |
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