401(k) · DOL Form 5500 · 2023

Mdu Resources Group, Inc. 401(k) Plan

Data updated 2026-08-25

$830M
Total assets Above avg plan size
8,551
Participants Very large workforce
98th
Percentile by assets National rank
$97,051
Avg per participant Below avg balance/head
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Official DOL plan name: Mdu Resources Group, Inc. 401(k) Retirement Plan · Sponsored by Mdu Resources Group, Inc. · North Dakota · Utilities

$830M in assets, 8,551 participants

Mdu Resources Group, Inc.'s Mdu Resources Group, Inc. 401(k) Retirement Plan reported $830M in total assets and 8,551 participants in its 2023 DOL Form 5500 filing, ranking in the 98th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #630 in Utilities (721 peers)

Coverage in North Dakota

Mdu Resources Group, Inc. 401(k) Retirement Plan covers 8,551 participants in North Dakota, 17x the typical North Dakota plan (state average ~504 per filing). Assets: $830M.

#630
in Utilities (721 peers)
-37.2%
assets change YoY
8.3×
vs typical plan assets (national mean)

Mdu Resources Group, Inc. 401(k) Retirement Plan's outsized position by total assets

Mdu Resources Group, Inc. 401(k) Retirement Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$829,880,488 Top 2% higher than 98% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Mdu Resources Group, Inc. 401(k) Retirement Plan's large-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mdu Resources Group, Inc. 401(k) Retirement Plan lands in the large band (8,551 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Mdu Resources Group, Inc. 401(k) Retirement Plan reported net income rose from -$227M in the plan year 2022 filing to $147M in the plan year 2023 filing.
  • Mdu Resources Group, Inc. 401(k) Retirement Plan end-of-year assets fell from $1.3B in the plan year 2022 filing to $830M in the plan year 2023 filing.
  • Mdu Resources Group, Inc. 401(k) Retirement Plan reported participants rose from 8,525 in the plan year 2022 filing to 8,551 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 301133956 · Mdu Resources Group, Inc. PY 2023 · 401(k)

Mdu Resources Group, Inc. 401(k) Retirement Plan · $830M · 8,551 · 98th

  • VS-ST $830M
  • VS-ST 8,551
  • VS-ST 98th
  • VS-ST 401(k)
  • VS-ST near Carlisle, LLC Employee Incentive Savings Plan
  • VS-ST ind #630

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Utilities retirement plans → · Plans in North Dakota →

Mdu Resources Group, Inc. 401(k) Retirement Plan in the asset neighbourhood

Saint Luke's 403(b) Plan$831MMdu Resources Group, Inc. 401(k) Retirement PlanMdu Resources Group, Inc. 40…$830MCarlisle, LLC Employee Incentive Savings PlanCarlisle, LLC Employee Incen…$829MLive Nation Entertainment, Inc. 401(k) Savings PlanLive Nation Entertainment, I…$828MKomatsu Mining Corp. Retirement Savings PlanKomatsu Mining Corp. Retirem…$828M
End-of-year total assets ($M) among Mdu Resources Group, Inc. 401(k) Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

North Dakota filing particulars

Total Assets (Beginning of Year)$1.3B
Net Assets (End of Year)$830M
Net Income$147M
Employer EIN301133956
Plan Effective Date1984-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mdu Resources Group, Inc.)

Sponsor-wide plan assets over time

All Mdu Resources Group, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$865M 39.040889270814255% vs 2022
2024 filing year
$0.8B$1B$1.2B$1.4B$1.6B 202220232024 $1.42B $0.87B ▼ -38.7%
Year Plans Participants Total Assets
2022 2 8,676 $1.4B
2023 2 8,688 $928M
2024 2 3,583 $865M

Nearby 401(k) Plans in North Dakota

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Mdu Resources Group, Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in North Dakota, assets vs. participants Scatter plot of 6 data points. 010000200003000040000 01234 Total assets ($B) Participants Mdu Resources Group, Inc. 401(k) Retirement Plan, Total assets ($B): 0.829880488 · Participants: 8551Mdu Resources Group, Inc. 401(k) Retirement PlanSanford Retirement Savings Plan, Total assets ($B): 3.110361496 · Participants: 30495Sanford Retirement Savings PlanKnife River Corporation 401(k) Retirement Plan, Total assets ($B): 0.7412361 · Participants: 5269Knife River Corporation 401(k) Retirement PlanDakotas Areawide IBEW-NECA Savings and Retirement Plan, Total assets ($B): 0.521170291 · Participants: 3853Dakotas Areawide IBEW-NECA Savings and Retirement PlanEide Bailly LLP 401(k) Profit Sharing Plan, Total assets ($B): 0.512524705 · Participants: 2920Eide Bailly LLP 401(k) Profit Sharing PlanOffutt Companies 401(k) Savings Plan, Total assets ($B): 0.501276799 · Participants: 4790Offutt Companies 401(k) Savings Plan
Mdu Resources Group, Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in North Dakota, assets vs. participants
Compare Mdu Resources Group, Inc. 401(k) Retirement Plan side-by-side with 3 peers →

Scale composition for Mdu Resources Group, Inc. 401(k) Retirement Plan

Mdu Resources Group, Inc. 401(k) Retirement Plan reports $830M in end-of-year assets across 8,551 participants (0.007% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.009% of 93,925,755 covered participants) - about $97,051 per participant (70% of the national average assets-per-participant) . Net income for plan year 2023 was $147M.

This plan identity (EIN 301133956, plan #004) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $1.3B to $776M (-41.3%) while covered participants moved from 8,525 to 3,465 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 8,525 $1.3B Open filing
2023 8,551 $830M This page
2024 · index core 3,465 $776M Open filing

The same sponsor also keeps 1 other index-core plan on PlainRetire:

Mdu Resources Group, Inc. 401(k) Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside North Dakota, the nearest 401(k) by assets is Carlisle, LLC Employee Incentive Savings Plan in AZ ($829M); by covered participants it is Wl Gore & Associates, Inc. 401(k) Plan in DE (8,557 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($830M here).

Similar participant headcount

Nearest other-state filings by covered participants (8,551 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Mdu Resources Group, Inc. 401(k) Retirement Plan assets move in 2023? ▼
Mdu Resources Group, Inc. 401(k) Retirement Plan contracted severely - down 37.2% during 2023, from $1.3B to $830M. Reported net income was $147M.
How have Mdu Resources Group, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mdu Resources Group, Inc.'s sponsor-wide assets declined 39.0%, from $1.4B to $865M.
Where does Mdu Resources Group, Inc. 401(k) Retirement Plan rank by assets among Form 5500 filers? ▼
Mdu Resources Group, Inc. 401(k) Retirement Plan ranks in the 98th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Mdu Resources Group, Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by assets is Carlisle, LLC Employee Incentive Savings Plan in AZ ($829M, 6,890 participants).
Which 401(k) plans cover a similar participant headcount to Mdu Resources Group, Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Wl Gore & Associates, Inc. 401(k) Plan in DE (8,557 participants, $1.8B in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 301133956.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.