NPKI director sells 2,013 shares of stock at ~$12 under 10b5-1

NPK International Inc. (NPKI) director transaction reported A director of NPK International Inc. reported an automatic sale of 2,013 shares of common stock on 11/24/2025 under a pre-arranged Rule 10b5-1 trading plan adopted on March 7, 2025.

Rhea-AI Filing Summary

NPK International Inc. (NPKI) director transaction reported

A director of NPK International Inc. reported an automatic sale of 2,013 shares of common stock on 11/24/2025 under a pre-arranged Rule 10b5-1 trading plan adopted on March 7, 2025. The weighted average sale price was $12.0001 per share, with individual trades executed between $11.65 and $12.13.

Following this transaction, the reporting person beneficially owns 133,346 shares of NPK International common stock in direct ownership. The transaction was filed on a Form 4 as a routine insider ownership update.

Insider Trade Summary

Net Seller: 2,013 shares

Net Sell 1 txn

Insider Lewis Michael A

Role Director

Sold 2,013 shs ($24K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,013	$12.0001	$24K

Holdings After Transaction: Common Stock — 133,346 shares (Direct)

Footnotes (2)

1. F1. The reported sale of 2,013 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.
2. F2. The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $11.65 to $12.13, inclusive. The reporting person undertakes to provide to NPK International Inc., any security holder of NPK International Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.

FAQ

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

What insider transaction did NPK International Inc. (NPKI) disclose on this Form 4?

The filing reports that a director of NPK International Inc. sold 2,013 shares of common stock on 11/24/2025 in an open-market transaction.

At what price were the NPKI shares sold in the reported transaction?

The shares were sold at a weighted average price of $12.0001 per share, with individual trades between $11.65 and $12.13.

How many NPK International (NPKI) shares does the insider own after the sale?

After the reported sale, the director beneficially owns 133,346 shares of NPK International Inc. common stock in direct ownership.

Was the NPKI insider sale made under a Rule 10b5-1 trading plan?

Yes. The 2,013-share sale occurred automatically under a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

What is the insider’s relationship to NPK International Inc. (NPKI)?

The reporting person is identified as a Director of NPK International Inc. on the Form 4.

Is this NPKI Form 4 filed by one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person, not a group filing.

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Accepted by SEC EDGAR 11/25/2025 - 05:25 PM Learn about SEC filing dates

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
Estimated average burden
hours per response:			0.5

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

X

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^*

Lewis Michael A

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/24/2025

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	11/24/2025		S		2,013(1)	D	$12.0001(2)	133,346	D

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 sale of 2,013 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

2. The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $11.65 to $12.13, inclusive. The reporting person undertakes to provide to NPK International Inc., any security holder of NPK International Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.

	By: M. Celeste Fruge For: Michael A. Lewis	11/25/2025
	** 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.