A business in context

MDU research notebook

Read the disclosures. Follow the relationships. Keep the dates in view.

Research JSON

Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-10-20 · 8029 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 4 · Ownership change

    Report date 2026-09-30 · 0001225208-26-008065

  2. 4 · Ownership change

    Report date 2026-09-30 · 0001225208-26-008064

  3. 10-Q · Quarterly report

    Report date 2026-06-30 · 0000067716-26-000072

  4. 8-K · Current report

    Report date 2026-08-06 · 0000067716-26-000064 · Items 2.02,7.01,9.01

  5. 4 · Ownership change

    Report date 2026-06-30 · 0001225208-26-006307

  6. 4 · Ownership change

    Report date 2026-06-30 · 0001225208-26-006306

  7. 8-K · Current report

    Report date 2026-05-11 · 0000067716-26-000054 · Items 5.02,5.05,5.07,9.01

  8. 10-Q · Quarterly report

    Report date 2026-03-31 · 0000067716-26-000050

  9. 8-K · Current report

    Report date 2026-05-07 · 0000067716-26-000045 · Items 2.02,7.01,9.01

  10. 4 · Ownership change

    Report date 2026-03-31 · 0001225208-26-004136

  11. 4 · Ownership change

    Report date 2026-03-31 · 0001225208-26-004135

  12. DEF 14A · Proxy statement

    Report date 2026-05-11 · 0000067716-26-000040

  13. 10-K · Annual report

    Report date 2025-12-31 · 0000067716-26-000014

  14. 4 · Ownership change

    Report date 2026-02-17 · 0001225208-26-002191

  15. 4 · Ownership change

    Report date 2026-02-17 · 0001225208-26-002190

  16. 8-K · Current report

    Report date 2026-02-05 · 0000067716-26-000008 · Items 2.02,7.01,9.01

  17. 8-K · Current report

    Report date 2026-01-15 · 0000067716-26-000005 · Items 1.01,2.03,9.01

  18. 8-K · Current report

    Report date 2025-12-23 · 0001539497-25-003350 · Items 1.01,8.01,9.01

  19. 8-K · Current report

    Report date 2025-12-11 · 0000067716-25-000095 · Items 1.01,2.01,9.01

  20. 8-K · Current report

    Report date 2025-12-03 · 0001539497-25-003175 · Items 1.01,8.01,9.01

  21. 8-K · Current report

    Report date 2025-11-20 · 0000067716-25-000092 · Items 7.01,9.01

  22. 10-Q · Quarterly report

    Report date 2025-09-30 · 0000067716-25-000090

  23. 8-K · Current report

    Report date 2025-11-06 · 0000067716-25-000087 · Items 2.02,7.01,9.01

  24. 8-K · Current report

    Report date 2025-08-12 · 0000067716-25-000083 · Items 5.02,7.01,9.01

  25. 8-K · Current report

    Report date 2025-08-07 · 0001539497-25-002057 · Items 1.01,9.01

  26. 10-Q · Quarterly report

    Report date 2025-06-30 · 0000067716-25-000074

  27. 8-K · Current report

    Report date 2025-08-07 · 0000067716-25-000073 · Items 2.02,7.01,9.01

  28. 8-K · Current report

    Report date 2025-05-13 · 0000067716-25-000052 · Items 5.02,5.05,5.07,9.01

  29. 10-Q · Quarterly report

    Report date 2025-03-31 · 0000067716-25-000042

  30. 8-K · Current report

    Report date 2025-05-08 · 0000067716-25-000041 · Items 2.02,7.01,9.01

  31. DEF 14A · Proxy statement

    Report date 2025-05-13 · 0000067716-25-000031

  32. 10-K · Annual report

    Report date 2024-12-31 · 0000067716-25-000016

  33. 8-K · Current report

    Report date 2025-02-14 · 0000067716-25-000012 · Items 1.01,5.03,7.01,9.01

  34. 8-K · Current report

    Report date 2025-02-06 · 0000067716-25-000007 · Items 2.02,7.01,9.01

  35. 8-K · Current report

    Report date 2024-11-21 · 0000067716-24-000113 · Items 7.01,9.01

  36. 8-K · Current report

    Report date 2024-11-14 · 0000067716-24-000111 · Items 5.02,9.01

  37. SC 13G/A · Ownership disclosure

    0002012383-24-002622

  38. 10-Q · Quarterly report

    Report date 2024-09-30 · 0000067716-24-000107

  39. 8-K · Current report

    Report date 2024-11-07 · 0000067716-24-000105 · Items 2.02,7.01,9.01

  40. 8-K · Current report

    Report date 2024-10-31 · 0000067716-24-000100 · Items 9.01

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-10-15 · 2026 Q3: filings in this completed quarter; not a live transaction feed

Purchases and sales include open-market or private transactions. Grants, exercises and tax withholding are shown separately. Amendments and joint reports can overlap; rows are not a net-buying score. Prices retain the filing's units; consult its footnotes.

Transaction rows by code · counts, not monetary totals
Purchase: 0 transaction rows0PSale: 0 transaction rows0SGrant / award: 2 transaction rows2AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

2 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-06-30
2026-07-01
DURKIN MARIAN MA · Grant / award
Acquired
Common Stock152.00.0
2026-06-30
2026-07-01
Dosch Vernon A.A · Grant / award
Acquired
Common Stock1293.00.0

Identity & relationships

Wikidata structured data · retrieved 2026-10-15 · 1663 unambiguous CIK-linked entities; coverage is incomplete

These are sourced identity and relationship claims, with incomplete coverage. Headquarters locations do not describe sales, assets or operating exposure.

SEC issuer · 0000067716MDU RESOURCES GROUP INC

No parent relationship is available in this import; this is not proof of independence.

No verified LEI join available.

GLEIF legal entity reference data · retrieved 2026-10-15 · 1199 checked identities; 0 unavailable records

Search names and former names
  • MDU RESOURCES GROUP INC · former SEC name · 1994-08-09 to 2026-10-08

Revenue in constant purchasing power

USD revenue expressed in 2026-09 consumer-price dollars. Each annual period uses a CPI-U average weighted by the days in its actual reporting interval. This is a purchasing-power comparison, not a company-specific price or volume measure.

Year endedReported USD revenueCPI-adjusted USD revenue
2024-12-31$1.76B$1.89B
2023-12-31$1.80B$1.99B
2022-12-31$1.75B$2.01B
2021-12-31$3.45B$4.29B
2020-12-31$5.53B$7.20B
2019-12-31$5.34B$7.03B
2018-12-31$4.53B$6.08B
2017-12-31$4.44B$6.11B

Bureau of Labor Statistics · retrieved 2026-10-20 · 9 selected series; gaps remain missing

Explore the CPI history ↗