NPK International grants Barton 12,850 stock units

The award vests in two installments: one-half on the second anniversary and the remaining one-half on the fourth anniversary.

Rhea-AI Filing Summary

NPK International Inc. (symbol: NPKI) is the issuer of record for a Form 4 filing submitted to the SEC. Barton III Alvin James reported acquisition or exercise transactions in this Form 4 filing.

NPK International Inc. (NPKI) EVP Commercial Growth & Ops. Alvin James Barton received a grant of 12,850 restricted stock units on September 22, 2026. The award vests one-half on the second anniversary of the grant date and the remaining one-half on the fourth anniversary, and settles in shares. His reported direct holdings following the transaction were 12,850 shares.

Insider Trade Summary

Grant/Award: 12,850 shares

Grant/Award 1 txn

Insider Barton III Alvin James

Role EVP Commercial Growth & Ops.

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	12,850	$0.00	$0.00

Holdings After Transaction: Common Stock — 12,850 shares (Direct)

Footnotes (1)

1. F1. Grant of restricted stock units that vests one-half on the second anniversary of the date of grant and remaining one-half on the fourth anniversary of the date of grant and settles in shares.

Key Figures

Restricted stock units granted: 12,850 units Direct holdings following transaction: 12,850 shares Reported transaction price: $0.00 per share +1 more

4 metrics

Restricted stock units granted 12,850 units Grant dated September 22, 2026

Direct holdings following transaction 12,850 shares Reported after the September 22, 2026 transaction

Reported transaction price $0.00 per share Restricted stock unit grant

Vesting schedule One-half on the second anniversary; remaining one-half on the fourth anniversary Grant-date anniversaries

Key Terms

restricted stock units, vests one-half, settles in shares

3 terms

restricted stock units financial

"Grant of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vests one-half financial

"vests one-half on the second anniversary"

settles in shares financial

"and settles in shares"

FAQ

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

How many restricted stock units did NPKI EVP Alvin James Barton receive?

Alvin James Barton received a grant of 12,850 restricted stock units on September 22, 2026. His reported direct holdings following the transaction were 12,850 shares.

When do NPKI's restricted stock units vest?

The restricted stock units vest one-half on the second anniversary of the grant date and the remaining one-half on the fourth anniversary. The units settle in shares.

Was Alvin James Barton's NPKI award reported under a Rule 10b5-1 plan?

No Rule 10b5-1 plan is reported for the award.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/24/2026 - 04:12 PM Accepted by SEC EDGAR 09/24/2026 - 04:11 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).

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^*

Barton III Alvin James

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP Commercial Growth & Ops.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/22/2026

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	09/22/2026		A		12,850(1)	A	$0.0	12,850	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. Grant of restricted stock units that vests one-half on the second anniversary of the date of grant and remaining one-half on the fourth anniversary of the date of grant and settles in shares.

	By: M. Celeste Fruge For: Alvin James Barton	09/24/2026
	** 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)