[Form 4] NPK International Inc. Insider Trading Activity

Rhea-AI Filing Summary

NPK International Inc. (NPKI) insider Matthew Lanigan, who serves as President, CEO and a director, reported a transfer of 770,249 shares of common stock on 10/03/2025. The filing states the transfer was a gift to his living trust; the trust lists Mr. Lanigan and his spouse as trustees. Following the reported transaction, Mr. Lanigan directly beneficially owns 325,664 shares and the trust is shown as holding 770,249 shares indirectly. The form was signed on 10/06/2025 and records the transaction price as $0.0, consistent with an intra-family trust transfer.

Positive

• Ownership continuity: Reporting person remains a trustee, suggesting retained influence after transfer
• Clear disclosure: Transfer described as a gift with transaction recorded at $0.0, consistent with estate-planning transfers

Negative

• Direct ownership reduced: Directly held shares declined by 770,249, which may affect certain direct‑holder thresholds
• Potential liquidity signal: Large movement of shares, even to a trust, can prompt investor questions about future selling intent

Insights

Corporate Governance Analyst

TL;DR: A director/CEO moved a sizeable stake into a living trust, keeping beneficial control while changing ownership form.

The reported gift of 770,249 shares to a living trust changes the legal ownership from direct to indirect while the reporting person remains a trustee. Such transfers are commonly used for estate planning and do not, by themselves, indicate a sale or change in economic exposure.

The main dependency is whether voting or disposition powers changed; the filing shows continued trustee role which suggests retained influence. Investors can watch future Form 4 filings for any sales or changes in trustee roles over the next 12 months to detect further ownership changes.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

LANIGAN MATTHEW

(Last) (First) (Middle)

9320 LAKESIDE BOULEVARD

SUITE 100

(Street)

THE WOODLANDS TX 77381

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
NPK International Inc. [ NPKI ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/03/2025

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/03/2025		G		770,249	D	$0.0	325,664(1)	D
Common Stock								770,249	I	by Trust

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reported transfer of 770,249 shares reflects a gift of these shares from the reporting person to his living trust, of which the reporting person and his spouse are trustees.

	By: M. Celeste Fruge For: Matthew Lanigan	10/06/2025
	** 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 4 (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.

FAQ

What did Matthew Lanigan report on Form 4 for NPKI?

He reported a transfer of 770,249 common shares on 10/03/2025, recorded as a gift to his living trust.

How many NPKI shares does Mr. Lanigan directly own after the transaction?

He directly beneficially owns 325,664 shares following the reported transfer.

Was the transfer a sale that generated cash?

No. The filing lists the transaction price as $0.0, indicating a gift rather than a sale.

Who controls the trust that received the shares?

The explanation states the trust is a living trust of which the reporting person and his spouse are trustees, implying continued control.

When was the Form 4 signed and filed?

The signature block shows the form dated 10/06/2025.