MDU Form 3: Director Tammy J. Miller Discloses 3,000 Shares

Tammy J. Miller filed an Initial Statement of Beneficial Ownership (Form 3) for MDU Resources Group, Inc. (MDU).

Accepted by SEC EDGAR 08/14/2025 - 05:15 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Tammy J. Miller filed an Initial Statement of Beneficial Ownership (Form 3) for MDU Resources Group, Inc. (MDU). The filing reports that Ms. Miller, identified as a director of the issuer, beneficially owns 3,000 shares of common stock in a direct ownership capacity. The event requiring the statement is dated 08/12/2025, and the filing was signed by an attorney-in-fact on 08/14/2025. No derivative securities, amendments, or additional ownership forms are reported in the document.

Positive

• Initial disclosure completed: The Form 3 registers the director's beneficial ownership as required under Section 16(a).
• Clear reporting: Document provides name, address, relationship (Director), event date (08/12/2025), and exact share count (3,000), supporting regulatory transparency.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine Form 3 disclosing director's initial direct ownership of 3,000 common shares; procedural disclosure, not a material transaction.

This Form 3 registers Ms. Tammy J. Miller as a reporting person because she is a director of MDU Resources Group, Inc., and discloses direct beneficial ownership of 3,000 common shares. The filing meets Section 16(a) initial-reporting requirements and contains no derivative positions or amendments. From a governance perspective, the document provides standard transparency about insider holdings; it does not indicate purchases, sales, option grants, or changes that would require Section 16 reporting beyond this initial statement.

Securities Compliance Analyst

TL;DR: Compliance filing appears complete for an initial statement: identifies reporting person, relationship, and exact share amount.

The Form 3 includes the reporting person's name and address, the issuer and ticker (MDU), the relationship checkbox marking Director, the event date (08/12/2025), and the reported direct ownership of 3,000 shares of common stock. The signature block shows an attorney-in-fact executed the form on 08/14/2025. There are no derivative securities reported and no indication of amendments, which suggests this is a straightforward initial disclosure under Section 16(a).

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Miller Tammy J

Role Director

Type	Security	Shares	Price	Value
Holding	Common Stock	--	--	--

Holdings: Common Stock — 3,000 shares (Direct)

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 3 filed for MDU by Tammy J. Miller report?

The Form 3 reports that Tammy J. Miller, identified as a director, directly beneficially owns 3,000 shares of MDU common stock; the event date is 08/12/2025.

Does the filing show any derivative securities or options for Tammy J. Miller (MDU)?

No. Table II for derivative securities is empty; the filing reports only 3,000 shares of common stock as direct ownership.

Who signed the Form 3 and when was it signed?

The Form 3 was signed by Anthony D. Foti, Attorney-in-Fact for Tammy J. Miller on 08/14/2025.

Is this filing an amendment to a prior report?

No. The form does not indicate an amendment date and is presented as an initial statement (Form 3).

What relationship to the issuer is stated on the Form 3?

The reporting person is marked as a Director of MDU Resources Group, Inc.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Miller Tammy J

(Last) (First) (Middle)

1200 WEST CENTURY AVENUE

(Street)

BISMARCK ND 58503

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
08/12/2025

3. Issuer Name and Ticker or Trading Symbol
MDU RESOURCES GROUP INC [ MDU ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	3,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

poamiller.txt

	Anthony D. Foti, Attorney-in-Fact for Tammy J. Miller	08/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.