Director at NPK International (NPKI) receives 8,558-share stock grant

Rhea-AI Filing Summary

LARSON RODERICK A. reported acquisition or exercise transactions in this Form 4 filing.

NPK International Inc. director Roderick A. Larson received a grant of 8,558 shares of common stock at $0.00 per share. These shares will vest on the earlier of the first anniversary of the grant date or the day before the next annual stockholders meeting. After the grant, Larson holds 23,655 common shares directly and 233,651 shares indirectly through LFV, LP, for which he disclaims beneficial ownership except for his pecuniary interest.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider LARSON RODERICK A.

Role null

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

Holdings After Transaction: Common Stock — 23,655 shares (Direct, null); Common Stock — 233,651 shares (Indirect, LFV, LP)

Footnotes (1)

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. The reporting person disclaims beneficial ownership of these shares held indirectly through this entity except to the extent of the pecuniary interest held therein.

Key Figures

Stock grant: 8,558 shares Grant price: $0.00 per share Direct holdings after: 23,655 shares +1 more

4 metrics

Stock grant 8,558 shares Common Stock granted to director on 2026-05-20

Grant price $0.00 per share Price per share for 8,558-share grant

Direct holdings after 23,655 shares Common Stock directly held by Larson after grant

Indirect holdings 233,651 shares Common Stock held indirectly through LFV, LP

Key Terms

Grant, award, or other acquisition, beneficial ownership, vest, indirect ownership

4 terms

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

beneficial ownership financial

"The reporting person disclaims beneficial ownership of these shares held indirectly"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

vest financial

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

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

indirect ownership financial

"shares held indirectly through this entity except to the extent of the pecuniary interest"

Form 4 Insider Transactions: What Each Field Means →

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^*

LARSON RODERICK A.

(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	23,655	D
Common Stock								233,651	I	LFV, LP(2)

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.

2. The reporting person disclaims beneficial ownership of these shares held indirectly through this entity except to the extent of the pecuniary interest held therein.

	By: M. Celeste Fruge For: Roderick A. Larson	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)

FAQ

What insider transaction did NPKI director Roderick Larson report?

Roderick A. Larson reported receiving a grant of 8,558 shares of NPK International common stock. The grant was at $0.00 per share and represents compensation, not an open-market purchase or sale, according to the Form 4 transaction details.

How many NPKI shares does Roderick Larson hold after this Form 4?

After the reported grant, Roderick A. Larson directly holds 23,655 shares of NPK International common stock. He is also associated with 233,651 shares held indirectly through LFV, LP, while disclaiming beneficial ownership beyond his pecuniary interest.

When do the granted NPKI shares to Roderick Larson vest?

The 8,558 granted shares vest on the earlier of the first anniversary of the grant date or the day before NPK International’s next annual stockholders meeting. This time-based vesting schedule is disclosed in the Form 4 footnotes.

Are Roderick Larson’s NPKI transactions open-market buys or sells?

The Form 4 shows a grant or award acquisition of 8,558 shares, not an open-market buy or sell. Another line is a holding entry for indirect ownership through LFV, LP, reflecting position reporting rather than a market trade.

What does Larson’s indirect ownership in NPKI through LFV, LP mean?

The Form 4 reports 233,651 NPK International shares held indirectly through LFV, LP. Larson disclaims beneficial ownership of those shares except for his pecuniary interest, meaning economic exposure without full beneficial ownership of all indirectly held shares.