NPK International VP granted 18,002 RSUs

NPK International Inc. reported that VP and General Counsel Mary Celeste Fruge acquired 18,002 shares of common stock through a grant of restricted stock units.

Rhea-AI Filing Summary

NPK International Inc. reported that VP and General Counsel Mary Celeste Fruge acquired 18,002 shares of common stock through a grant of restricted stock units. These units vest in one-third increments on June 1 of each subsequent year after the grant and settle in shares. Following this compensation award, she holds 283,215 shares directly.

Insider Trade Summary

Grant/Award: 18,002 shares

Grant/Award 1 txn

Insider Fruge Mary Celeste

Role VP, General Counsel

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	18,002	$0.00	$0.00

Holdings After Transaction: Common Stock — 283,215 shares (Direct)

Footnotes (1)

1. F1. Grant of restricted stock units that vest in one-third increments on June 1 of each subsequent year after grant and settle in shares.

Key Figures

RSU grant size: 18,002 shares Price per granted share: $0.00 per share Shares owned after grant: 283,215 shares +1 more

4 metrics

RSU grant size 18,002 shares Restricted stock units granted on May 19, 2026

Price per granted share $0.00 per share Equity award, not an open-market purchase

Shares owned after grant 283,215 shares Total direct holdings following the transaction

Vesting pattern One-third annually RSUs vest in one-third increments each June 1 after grant

Key Terms

restricted stock units, transaction code A, direct ownership

3 terms

restricted stock units financial

"Grant of restricted stock units that vest in one-third increments on June 1"

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.

transaction code A financial

"transaction_code_description: Grant, award, or other acquisition"

direct ownership financial

"ownership_type: direct and direct_or_indirect: D for the common stock"

FAQ

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

What insider transaction did NPKI disclose for Mary Celeste Fruge?

NPK International reported that VP and General Counsel Mary Celeste Fruge received a grant of 18,002 restricted stock units. These units represent common stock awarded as compensation, not an open-market purchase, and will vest over time according to the grant’s schedule.

How many NPKI shares were granted in this Form 4 filing?

The filing shows a grant of 18,002 shares of NPK International common stock via restricted stock units. The transaction code is A, indicating a grant or award, and the price per share is zero because this is equity compensation rather than a market trade.

What is the vesting schedule for Mary Celeste Fruge’s NPKI restricted stock units?

The restricted stock units vest in one-third increments on June 1 of each subsequent year after the grant. As each tranche vests, it settles in shares of NPK International common stock, gradually delivering the full 18,002-share award over time.

How many NPKI shares does Mary Celeste Fruge own after this transaction?

After the grant, Mary Celeste Fruge is reported as owning 283,215 shares of NPK International common stock directly. This figure reflects her total direct holdings immediately following the equity compensation award disclosed in the Form 4 filing.

Was this NPKI insider transaction a market buy or sell?

No, this was not a market buy or sell. The Form 4 uses transaction code A, meaning a grant, award, or other acquisition. The shares were granted as restricted stock units at no cost, as part of her compensation package, rather than traded in the open market.

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

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Accepted by SEC EDGAR 05/21/2026 - 05:05 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^*

Fruge Mary Celeste

(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)
	VP, General Counsel

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

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	05/19/2026		A		18,002(1)	A	$0.0	283,215	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 vest in one-third increments on June 1 of each subsequent year after grant and settle in shares.

	M. Celeste Fruge	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)