Mdu Resources Group, Inc. 401(k) Plan: Login, Facts & Contact Information

Mdu Resources Group, Inc. 401(k) Plan Facts

Plan name
MDU RESOURCES GROUP, INC. 401(K) RETIREMENT PLAN
Plan type
401(k) with employer contributions and profit sharing with a company-stock (ESOP) component
Plan sponsor
MDU RESOURCES GROUP, INC.
Participants
4,418 (2,064 active employees)
Former employees with a balance
501
Plan assets
$775,551,136 at Dec 31, 2024
Average account balance
$305,455 across 2,539 accounts
Employer contributions
$19,975,363 in plan year 2024 (36% of all contributions)
Recordkeeper
Principal Life Insurance Company
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 1984
✓ Employer contributions✓ Automatic enrollment✓ Default investment for undecided participants✓ Participants choose their own investments— Self-directed brokerage window✓ Profit sharing✓ Company stock (ESOP)

Source: Form 5500 for plan year 2024 (Jan 1, 2024 – Dec 31, 2024), filed Jun 19, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $56.0 million went into the plan in contributions, $20.0 million of it from the employer (36%).
  • $98.3 million was paid out to participants.
  • Investment and other income added $169.3 million.
  • Administrative expenses were $592,317, about $233 per account.

How the Mdu Resources Group, Inc. 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
201913,164$1.19 billion$50.9 million$109.5 million
202014,018$1.35 billion$51.1 million$118.8 million
202110,950$1.55 billion$48.6 million$121.6 million
202211,175$1.32 billion$50.1 million$115.4 million
202311,281$829.9 million$28.1 million$93.9 million
20244,418$775.6 million$20.0 million$98.3 million

Mdu Resources Group, Inc. 401(k) Contact Information

Phone
701-530-1000
Mailing address
P.O. BOX 5650 1200 WEST CENTURY AVE, BISMARCK ND 585065650
Plan sponsor
MDU RESOURCES GROUP, INC.
Plan administrator
MDU RESOURCES GROUP, INC. EMPLOYEE BENEFITS COMMITTEE
Employer identification number (EIN)
30-1133956
Plan number
004

Questions about the Mdu Resources Group, Inc. 401(k)

Does Mdu Resources Group, Inc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $20.0 million, 36% of all contributions.

Does the Mdu Resources Group, Inc 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Mdu Resources Group, Inc 401(k) plan?

4,418 participants at the start of plan year 2024, 2,064 of them active employees, and 501 former employees who still had money in the plan.

What is the average 401(k) balance at Mdu Resources Group, Inc?

About $305,455 per account: $775.6 million in plan assets across 2,539 accounts with a balance at the end of plan year 2024.

Who manages the Mdu Resources Group, Inc 401(k) accounts?

Principal (listed on the filing as PRINCIPAL LIFE INSURANCE COMPANY) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Mdu Resources Group, Inc. How do I access my 401(k)?

Your account stays with Principal after you leave, so you can log in with the same credentials. If your balance was small, the plan may have rolled it into an IRA in your name. If you can't find it, Beagle can locate it for you.

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