Key facts
- This page summarizes M. Celeste Fruge's Form 4 filing for NPK International Inc. (NPKI).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 18 Mar 2026, 16:35.
M. Celeste Fruge - 16 Mar 2026 Form 4 Insider Report for NPK International Inc. (NPKI)
- Reporting relationship
- VP, General Counsel
- Issuer ticker
- NPKI
- Reported as of
- 16 Mar 2026
- Net transaction value
- -$13,560
- SEC form
- 4
- Accepted by SEC
- 18 Mar 2026, 16:35:48 UTC
- Prior SEC filing
- 10 Mar 2026
- Next SEC filing
- 21 May 2026
- Source filing
- View source filing
- Reporting owner signature
- M. Celeste Fruge
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
M. Celeste Fruge filed Form 4 for NPK International Inc. (NPKI) on 18 Mar 2026.
Change
- Previous filing in this sequence was filed on 10 Mar 2026.
- Current net transaction value: -$13,560.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001975485
Primary reporting owner
Fruge Mary Celeste
- Relationship
- VP, General Counsel
- Address
- 9320 LAKESIDE BOULEVARD, SUITE 100, THE WOODLANDS
- Signature
- M. Celeste Fruge
- Signature date
- 18 Mar 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
NPKI
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +1,000
- Change %
- +0.38%
- Price
- $4.32*
- Shares after
- 266,213
- Date
- 16 Mar 2026
- Ownership
- Direct
- Footnotes
- F1
NPKI
transaction
Common Stock
Sale
- Transaction value
- $13,560
- Shares
- -1,000
- Change %
- -0.38%
- Price
- $13.56
- Shares after
- 265,213
- Date
- 16 Mar 2026
- Ownership
- Direct
- Footnotes
- F1, F2
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
NPKI
transaction
Derivative
Non-Qualified Stock Option (right to buy)
Options Exercise
- Transaction value
- Shares
- -1,000
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 16 Mar 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 1,000
- Exercise price
- $4.32
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Rule 10b5-1 trading plan
These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.
Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).
Explanation of responses 2 footnotes
Footnote F1
The reported exercise of 1,000 options and subsequent sale of the shares acquired upon exercise occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.
Footnote F2
These options were sold on the open market at price stated. 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 options sold.