Jason L. Vollmer - 17 Feb 2026 Form 4 Insider Report for MDU RESOURCES GROUP INC (MDU)

Reporting relationship: CFO
Issuer ticker: MDU
Reported as of: 17 Feb 2026
Net transaction value: -$748,556
SEC form: 4
Accepted by SEC: 19 Feb 2026, 18:22:34 UTC
Prior SEC filing: 09 Sep 2025
Source filing: View source filing
Reporting owner signature: Anthony D. Foti, Attorney-in-Fact for Jason L. Vollmer

Key filing fact

Jason L. Vollmer filed Form 4 for MDU RESOURCES GROUP INC (MDU) on 19 Feb 2026.

Key facts

This page summarizes Jason L. Vollmer's Form 4 filing for MDU RESOURCES GROUP INC (MDU).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 19 Feb 2026, 18:22.

Change

Previous filing in this sequence was filed on 09 Sep 2025.
Current net transaction value: -$748,556.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001626019 Primary reporting owner

Vollmer Jason L

Relationship: CFO
Address: 1200 WEST CENTURY AVENUE, BISMARCK
Signature: Anthony D. Foti, Attorney-in-Fact for Jason L. Vollmer
Signature date: 19 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MDU transaction

Common Stock

Award

Transaction value: $0
Shares: +15,229
Change %: +4.4%
Price: $0.000000
Shares after: 361,742
Date: 17 Feb 2026
Ownership: Direct
Footnotes: F1, F2

MDU transaction

Common Stock

Tax liability

Transaction value: $748,556
Shares: -36,766
Change %: -10%
Price: $20.36
Shares after: 324,976
Date: 18 Feb 2026
Ownership: Direct
Footnotes: F2, F3, F4

MDU holding

Common Stock - 401(k)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 8,554
Date: 17 Feb 2026
Ownership: By Trustee

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Footnote F2

Includes (a) Common Stock, including 52,678 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Footnote F3

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Footnote F4

Price is equal to the closing price of a share of Common Stock on February 18, 2026.