NPKINYSE

NPK International Inc.

Services-Miscellaneous Equipment Rental & Leasing · DE · CIK 71829

NPK International Inc. provides temporary worksite access solutions through matting rentals, sales, and related services

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$1.27B

Market cap

$15.87

Last close

+1.7%

+3.6%

1.3M

Volume

Price · last 39 sessions+6.3%

May 4L $14.28 · H $15.95Jun 29

341

Total filings

May 20, 2026

Last filing

12/31

Fiscal year end

All 8-K · 220 10-Q · 46 DEFA14A · 17 SC 13G · 17 10-K · 16 DEF 14A · 16 8-K/A · 7 10-Q/A · 1

Insider Activity

In the 90 days to Mar 25, 2026: 3 sold $1.9M.

Date	Insider	Action	Shares	Price	Value
Mar 25, 2026	Piontek GreggSenior Vice President and CFO	Sell	15,000	$15.03	$225K
Mar 16, 2026	Fruge Mary CelesteVP, General Counsel	Sell	1,000	$13.56	$14K
Mar 6, 2026	Fruge Mary CelesteVP, General Counsel	Sell	11,193	$13.34	$149K
Mar 4, 2026	Piontek GreggSenior Vice President and CFO	Sell	73,590	$14.10	$1.0M
Mar 4, 2026	Piontek GreggSenior Vice President and CFO	Sell	35,000	$14.02	$491K
Feb 23, 2026	Lewis Michael ADirector	Sell	2,013	$14.31	$29K
Nov 24, 2025	Lewis Michael ADirector	Sell	2,013	$12.00	$24K
Oct 1, 2025	Briggs LoriVP & President, Ind. Solutions	Sell	10,108	$11.51	$116K

Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.

What Changed

Risk factors · Feb 28, 2025 → Feb 27, 2026

41 added · 39 removed between the two most recent 10-Ks. The risks a company starts — or stops — disclosing are often the story.

Newly disclosed

In November 2025, we completed the acquisition of Grassform Plant Hire Limited (“Grassform”), a U.K. market leader in ground protection and temporary roadway solutions and services, for estimated net consideration of £34.9 ($46.0) million.
In addition, our information systems and information technology infrastructure are subject to security threats and increasingly sophisticated cybersecurity incidents, including, but not limited to, denial-of-service attacks, hacking, “phishing” attacks, computer viruses, ransomware, malware, employee or insider error, malfeasance, social engineering or physical breaches, including cyber-based attacks that may leverage artificial intelligence technologies to increase speed, scale, or effectiveness.
In addition, as cyberattacks and other cybersecurity incidents increase in frequency and magnitude, including as threat actors increasingly leverage artificial intelligence technologies, we may be unable to obtain cybersecurity insurance in amounts or on terms we view as appropriate for our operations.
Damage to our customers’ property, for example from spills of hazardous materials or plastic materials, such as pellets, from broken mats, could be extensive if a major problem occurs.
In June 2025, we entered into a U.S. senior secured revolving credit agreement (the “Credit Facility”) with a group of lenders that provides financing of up to $150 million available for borrowings (inclusive of letters of credit), which can be increased up to $250 million, subject to certain conditions.
Risks Related to Customer Concentration During 2025, approximately 74% of our revenues were derived from our 20 largest customers, of which our three largest customers represented 19%, 15%, and 10%, respectively, of our revenues.
While we cannot predict the impact to our income taxes of future tax legislation, guidance, or interpretations, if such changes are enacted, our profitability could be negatively impacted.
In addition, our capital expenditures in 2026 are expected to range between $45 million to $55 million, exclusive of any manufacturing expansion or future acquisitions.
References to past events are provided by way of example only and are not intended to be a complete listing or a representation as to whether or not such factors have occurred in the past Risks in this section are grouped in the following categories: (1) Business and Industry Risks;
Bribery Act, export laws, and other similar laws applicable to our operations in international markets; ▪ our inexperience in certain international markets; ▪ political and economic instability; ▪ changes in global trade policies, including the termination of trade agreements, the imposition of tariffs on certain imports into the United States, and other regulations affecting trade between the United States and countries in which we conduct business; and ▪ fluctuations in foreign currency exchange rates.
Such manufacturing capacity expansion projects may be delayed, interrupted, or otherwise limited due to unexpected cost increases, availability of labor and materials, unforeseen hazards, and other risks associated with construction projects.
In addition, the expected benefits of such future manufacturing operations are subject to a number of risks and uncertainties which could negatively impact our results from operations, including among other items, incorrect assumptions 8 regarding future business activity levels, future per unit manufacturing cost assumptions, including expectations of the cost and availability of raw materials, as well as the diversion of management’s attention from existing operations or other priorities.

No longer disclosed

Failure to remain compliant with these laws, regulations and policies may result in, among other things, fines, penalties, costs, investigation and/or cleanup of contaminated sites and site closure obligations, costs of remedying noncompliance, termination or suspension of certain operations, or other expenditures.
In addition, our information systems and information technology infrastructure are subject to security threats and sophisticated cyber-based attacks, including, but not limited to, denial-of-service attacks, hacking, “phishing” attacks, computer viruses, ransomware, malware, employee or insider error, malfeasance, social engineering, or physical breaches, that can cause deliberate or unintentional damage, destruction or misuse, manipulation, denial of access to or disclosure of confidential or important information or intellectual property.
A failure of or breach in our information systems and information technology infrastructure, or those of our third-party vendors, could expose us and our employees, customers, and suppliers to risks of misuse of information or systems, transaction errors, the compromise of confidential information, manipulation and destruction of data, the loss of sales and customers and operations disruptions. 14 There can be no assurance that security incidents will not occur.
For example, the Organization for Economic Co-operation and Development (“OECD”), a global coalition of member countries, proposed a two-pillar plan to reform international taxation.
Business and Industry Risks Risks Related to our Recently Completed Sale of the Fluids Systems Business On September 13, 2024, we completed the sale of the equity interests in one of our subsidiaries which held substantially all of the Company’s previously operated Fluids Systems business.
We obtain cybersecurity insurance, though costs related to a cyber-based attack may exceed the amount of insurance coverage or be excluded under the terms of our cybersecurity insurance policy.
In addition, as cyber-based attacks increase in frequency and magnitude, we may be unable to obtain cybersecurity insurance in amounts or on terms we view as appropriate for our operations.
For 2024, through the closing date of the Sale Transaction in September 2024, the Fluids Systems business generated approximately 68% of total combined company revenue (72% and 76% for 2023 and 2022, respectively).
On October 29, 2024, we experienced a ransomware cybersecurity incident, and we expect such cybersecurity threats and incidents involving our systems and third-party systems to continue.
We are subject to a number of risks associated with the sale of the Fluids Systems business, including risks associated with (i) our requirement to provide certain transition services in connection with the Sale Transaction and any issues, delays or complications in completing such services, including the incurrence of unanticipated costs to complete such services, (ii) the diversion of management’s attention away from the operations of our retained business; and (iii) any required payments of indemnification obligations under the Sale Transaction agreement for retained liabilities.
As a result of the Sale Transaction, we may incur or experience various adverse effects, including but not limited to (i) greater costs or realize fewer benefits than anticipated under the Sale Transaction agreement, (ii) operational or commercial difficulties segregating the divested assets from our retained assets, (iii) disputes with the Purchaser regarding the nature and sufficiency of the transition services we provide, (iv) higher vendor costs due to reduced economies of scale or other similar dis-synergies, (v) modified, terminated or scaled back relationships with our existing customers or difficulty in attracting prospective customers, (vi) loss or difficulty in retaining employees due to concerns over future job security or responsibilities, or (vii) losses or increased inefficiencies from stranded or underutilized assets.
Bribery Act, export laws, and other similar laws applicable to our operations in international markets; ▪ our inexperience in certain international markets; ▪ political and economic instability; ▪ ongoing conflicts in Europe and the Middle East; and ▪ fluctuations in foreign currency exchange rates. 8 These risks and uncertainties may also have the effect of heightening many of the other risks specified in our risk factors or disclosed in our public filings, any of which could materially and adversely affect our business and results of operations.

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