NPK International director granted 8,558 shares

MINGE JOHN C reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

MINGE JOHN C reported acquisition or exercise transactions in this Form 4 filing.

NPK International Inc. director John C. Minge reported an equity award of 8,558 shares of Common Stock on May 20, 2026. The shares were granted at no cash cost and will vest on the earlier of the first anniversary of the grant date or the day prior to the next annual stockholders meeting. After this award, he directly holds 253,942 shares of NPK International common stock.

Insider Trade Summary

Grant/Award: 8,558 shares

Grant/Award 1 txn

Insider MINGE JOHN C

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,558	$0.00	$0.00

Holdings After Transaction: Common Stock — 253,942 shares (Direct)

Footnotes (1)

1. F1. The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting.

Key Figures

Shares granted: 8,558 shares Grant price: $0.0000 per share Shares held after grant: 253,942 shares

3 metrics

Shares granted 8,558 shares Equity award of Common Stock on May 20, 2026

Grant price $0.0000 per share Reported transaction price for the 8,558-share award

Shares held after grant 253,942 shares Total direct holdings following the Form 4 transaction

Key Terms

Grant, award, or other acquisition, vesting, annual stockholders meeting, Common Stock

4 terms

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

vesting financial

"The shares will vest on the earlier of the first anniversary"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

annual stockholders meeting financial

"or the day prior to the next annual stockholders meeting"

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transaction did NPKI director John C. Minge report?

Director John C. Minge reported receiving 8,558 shares of NPK International Common Stock as an equity award. The grant carried a zero dollar price per share and increases his direct holdings to 253,942 shares following the transaction, according to the Form 4 disclosure.

When do the newly granted NPKI shares to John C. Minge vest?

The 8,558 granted shares will vest on the earlier of the first anniversary of the grant date or the day before the next annual stockholders meeting. This time-based vesting schedule ties the award to continued service through that future corporate governance milestone.

How many NPKI shares does John C. Minge hold after this Form 4?

After the equity award, John C. Minge directly holds 253,942 shares of NPK International Common Stock. This total includes the newly granted 8,558 shares that vest in the future, as disclosed in the Form 4 transaction details and accompanying ownership totals.

Was cash paid for the 8,558 NPKI shares granted to John C. Minge?

No cash was paid for the 8,558-share award to John C. Minge, as the transaction price per share is reported as 0.0000. This indicates a compensation-related grant rather than a market purchase, consistent with the Form 4 code for grant or award acquisition.

What does transaction code "A" mean in the NPKI Form 4 filing?

Transaction code “A” in this Form 4 indicates a grant, award, or other acquisition of shares, not an open-market trade. For NPK International, it reflects an 8,558-share compensation grant to director John C. Minge rather than a discretionary stock purchase or sale.

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

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Accepted by SEC EDGAR 05/21/2026 - 05:18 PM EDT 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).

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^*

MINGE JOHN C

(Last) (First) (Middle)

9320 LAKESIDE BOULEVARD

SUITE 100

(Street)

THE WOODLANDS TEXAS 77381

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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

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

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

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	05/20/2026		A		8,558(1)	A	$0.0	253,942	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 shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting.

	By: M. Celeste Fruge For: John C.Minge	05/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)