NPK International officer files sale of 2,991 shares

An NPK International officer has filed a Rule 144 notice to sell 2,991 common shares from vested equity awards.

Rhea-AI Filing Summary

NPK International Inc. (NPKI) has a notice under Rule 144 indicating that officer Matthew Warren plans to sell up to 2,991 shares of common stock. The shares are held at Morgan Stanley Smith Barney’s Executive Financial Services and are expected to be sold on the NYSE with an estimated aggregate sale price of $40,378.50. The shares to be sold relate to Restricted Stock Units granted by the issuer on June 1, 2024.

Key Figures

Shares to be sold: 2,991 shares Estimated aggregate sale price: $40,378.50 RSU grant date: June 1, 2024 +2 more

5 metrics

Shares to be sold 2,991 shares Maximum NPK International Inc. common shares covered by the Rule 144 notice

Estimated aggregate sale price $40,378.50 Estimated total value of the 2,991 shares listed in the securities information section

RSU grant date June 1, 2024 Date of Restricted Stock Units from which the 2,991 shares originate

Issuer phone number 281-362-6800 Contact number listed for NPK International Inc.

Shares related to RSUs 2,991 shares Number of shares shown in the Securities To Be Sold section for the June 1, 2024 RSUs

Key Terms

Rule 144, Restricted Stock Units, Form 144

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"Common | 06/01/2024 | Restricted Stock Units | Issuer |"

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.

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

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

What does the Form 144 filing by NPKI’s officer Matthew Warren disclose?

It discloses that officer Matthew Warren has filed a Rule 144 notice to sell up to 2,991 shares of NPK International Inc. common stock, held through Morgan Stanley Smith Barney’s Executive Financial Services, with an estimated aggregate sale price of $40,378.50.

How many NPKI shares are covered by this Rule 144 notice?

The notice covers up to 2,991 shares of NPK International Inc. common stock. These shares are associated with Restricted Stock Units granted on June 1, 2024 and are planned to be sold under Rule 144.

What is the estimated value of the NPKI shares in this Form 144 filing?

The estimated aggregate sale price for the 2,991 shares of NPK International Inc. common stock is $40,378.50. This figure is based on the information provided in the Rule 144 securities information section.

On which market are the NPKI shares in the Form 144 planned to be sold?

The shares referenced in the Form 144 are indicated for sale on the NYSE. The filing lists NPK International Inc. common stock with a planned sale through Morgan Stanley Smith Barney’s Executive Financial Services.

What type of securities is Matthew Warren selling from NPKI?

The securities are common stock of NPK International Inc., arising from Restricted Stock Units granted on June 1, 2024. Up to 2,991 shares from these RSUs are covered by the Rule 144 sale notice.

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

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Available on EDGAR 09/09/2026 - 04:57 PM EDT Accepted by SEC EDGAR 09/09/2026 - 04:56 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002152870
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	NPK INTERNATIONAL, INC.
SEC File Number	001-02960
Address of Issuer	9320 Lakeside Boulevard, Suite 100 The Woodlands TEXAS 77381
Phone	2813626800
Name of Person for Whose Account the Securities are To Be Sold	MATTHEW WARREN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2991	40378.50	84909894	09/09/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/01/2024	Restricted Stock Units	Issuer			2991	06/01/2024	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/09/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/17/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Matthew Warren
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)