# EDGAR Filing Document

**Accession Number:** 0000071829
**File Stem:** 0000071829-26-000028
**Filing Date:** 2026-5
**Character Count:** 80467
**Document Hash:** bb29371afc3ce20f7116dc9d10fa84ca
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000071829-26-000028.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 0000071829-26-000028

**CONFORMED SUBMISSION TYPE**: 10-Q

**PUBLIC DOCUMENT COUNT**: 59

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260501

**DATE AS OF CHANGE**: 20260501

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NPK International Inc.
- **CENTRAL INDEX KEY:** 0000071829
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-MISCELLANEOUS EQUIPMENT RENTAL & LEASING [7350]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 721123385
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-Q
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-02960
- **FILM NUMBER:** 26930319

**BUSINESS ADDRESS:**
- **STREET 1:** 9320 LAKESIDE BOULEVARD
- **STREET 2:** SUITE 100
- **CITY:** THE WOODLANDS
- **STATE:** TX
- **ZIP:** 77381
- **BUSINESS PHONE:** 281-362-6800

**MAIL ADDRESS:**
- **STREET 1:** 9320 LAKESIDE BOULEVARD
- **STREET 2:** SUITE 100
- **CITY:** THE WOODLANDS
- **STATE:** TX
- **ZIP:** 77381

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NEWPARK RESOURCES INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NEW PARK MINING CO
- **DATE OF NAME CHANGE:** 19720828

?xml version='1.0' encoding='ASCII'? nr-20260331

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

**FORM 10-Q** 

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2026

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________ to __________

**Commission File Number: 001-02960**![NPK Logo.jpg](nr-20260331_g1.jpg)

**NPK International Inc.** 

(Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **Delaware** | **72-1123385** |
| (State or other jurisdiction of incorporation or organization) | (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.) |
| **9320 Lakeside Boulevard,** | **Suite 100** | |
| **The Woodlands,** | **Texas** | **77381** |
| (Address of principal executive offices) | (Address of principal executive offices) | (Zip Code) |

---

**(281) 362-6800** 

(Registrant's telephone number, including area code)

 **Not Applicable&nbsp;&nbsp;&nbsp;&nbsp;**

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock, $0.01 par value | NPKI | New York Stock Exchange |

---

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☑&nbsp;&nbsp;&nbsp;&nbsp; No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

&nbsp;&nbsp;&nbsp;&nbsp;Yes ☑&nbsp;&nbsp;&nbsp;&nbsp; No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☐ | Accelerated filer | ☑ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
| | | Emerging growth company | ☐ |

---

------

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

&nbsp;&nbsp;&nbsp;&nbsp;Yes ☐ &nbsp;&nbsp;&nbsp;&nbsp;No ☑&nbsp;&nbsp;&nbsp;&nbsp;

As of April 29, 2026, a total of 84,447,036 shares of common stock, $0.01 par value per share, were outstanding.

------

**NPK INTERNATIONAL INC.**

**INDEX TO QUARTERLY REPORT ON FORM 10-Q**

**FOR THE THREE MONTHS ENDED**

**MARCH 31, 2026** 

---

| | | |
|:---|:---|:---|
| <u>[PART I](#i3c757579422f48b3bc2d0ee3dccfaafe_13)</u> | <u>[FINANCIAL INFORMATION](#i3c757579422f48b3bc2d0ee3dccfaafe_13)</u> | <u>[2](#i3c757579422f48b3bc2d0ee3dccfaafe_13)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 1.](#i3c757579422f48b3bc2d0ee3dccfaafe_16)</u> | <u>[Financial Statements](#i3c757579422f48b3bc2d0ee3dccfaafe_16)</u> | <u>[2](#i3c757579422f48b3bc2d0ee3dccfaafe_16)</u> |
| | <u>[Condensed Consolidated Balance Sheets](#i3c757579422f48b3bc2d0ee3dccfaafe_19)</u> | <u>[2](#i3c757579422f48b3bc2d0ee3dccfaafe_19)</u> |
| | <u>[Condensed Consolidated Statements of Operations](#i3c757579422f48b3bc2d0ee3dccfaafe_22)</u> | <u>[3](#i3c757579422f48b3bc2d0ee3dccfaafe_22)</u> |
| | <u>[Condensed Consolidated Statements of Comprehensive Income (Loss)](#i3c757579422f48b3bc2d0ee3dccfaafe_25)</u> | <u>[4](#i3c757579422f48b3bc2d0ee3dccfaafe_25)</u> |
| | <u>[Condensed Consolidated Statements of Stockholders' Equity](#i3c757579422f48b3bc2d0ee3dccfaafe_28)</u> | <u>[5](#i3c757579422f48b3bc2d0ee3dccfaafe_28)</u> |
| | <u>[Condensed Consolidated Statements of Cash Flows](#i3c757579422f48b3bc2d0ee3dccfaafe_31)</u> | <u>[6](#i3c757579422f48b3bc2d0ee3dccfaafe_31)</u> |
| | <u>[Notes to Unaudited Condensed Consolidated Financial Statements](#i3c757579422f48b3bc2d0ee3dccfaafe_34)</u> | <u>[7](#i3c757579422f48b3bc2d0ee3dccfaafe_34)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 2.](#i3c757579422f48b3bc2d0ee3dccfaafe_67)</u> | <u>[Management's Discussion and Analysis of Financial Condition and Results of Operations](#i3c757579422f48b3bc2d0ee3dccfaafe_67)</u> | <u>[14](#i3c757579422f48b3bc2d0ee3dccfaafe_67)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 3.](#i3c757579422f48b3bc2d0ee3dccfaafe_82)</u> | <u>[Quantitative and Qualitative Disclosures About Market Risk](#i3c757579422f48b3bc2d0ee3dccfaafe_82)</u> | <u>[20](#i3c757579422f48b3bc2d0ee3dccfaafe_82)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 4.](#i3c757579422f48b3bc2d0ee3dccfaafe_85)</u> | <u>[Controls and Procedures](#i3c757579422f48b3bc2d0ee3dccfaafe_85)</u> | <u>[20](#i3c757579422f48b3bc2d0ee3dccfaafe_85)</u> |
| <u>[PART II](#i3c757579422f48b3bc2d0ee3dccfaafe_88)</u> | <u>[OTHER INFORMATION](#i3c757579422f48b3bc2d0ee3dccfaafe_88)</u> | <u>[21](#i3c757579422f48b3bc2d0ee3dccfaafe_88)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 1.](#i3c757579422f48b3bc2d0ee3dccfaafe_91)</u> | <u>[Legal Proceedings](#i3c757579422f48b3bc2d0ee3dccfaafe_91)</u> | <u>[21](#i3c757579422f48b3bc2d0ee3dccfaafe_91)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 1A.](#i3c757579422f48b3bc2d0ee3dccfaafe_94)</u> | <u>[Risk Factors](#i3c757579422f48b3bc2d0ee3dccfaafe_94)</u> | <u>[21](#i3c757579422f48b3bc2d0ee3dccfaafe_94)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 2.](#i3c757579422f48b3bc2d0ee3dccfaafe_97)</u> | <u>[Unregistered Sales of Equity Securities and Use of Proceeds](#i3c757579422f48b3bc2d0ee3dccfaafe_97)</u> | <u>[21](#i3c757579422f48b3bc2d0ee3dccfaafe_97)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 3.](#i3c757579422f48b3bc2d0ee3dccfaafe_100)</u> | <u>[Defaults Upon Senior Securities](#i3c757579422f48b3bc2d0ee3dccfaafe_100)</u> | <u>[22](#i3c757579422f48b3bc2d0ee3dccfaafe_100)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 4.](#i3c757579422f48b3bc2d0ee3dccfaafe_103)</u> | <u>[Mine Safety Disclosures](#i3c757579422f48b3bc2d0ee3dccfaafe_103)</u> | <u>[23](#i3c757579422f48b3bc2d0ee3dccfaafe_103)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 5.](#i3c757579422f48b3bc2d0ee3dccfaafe_106)</u> | <u>[Other Information](#i3c757579422f48b3bc2d0ee3dccfaafe_106)</u> | <u>[23](#i3c757579422f48b3bc2d0ee3dccfaafe_106)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[ITEM 6.](#i3c757579422f48b3bc2d0ee3dccfaafe_112)</u> | <u>[Exhibits](#i3c757579422f48b3bc2d0ee3dccfaafe_112)</u> | <u>[23](#i3c757579422f48b3bc2d0ee3dccfaafe_112)</u> |
| | <u>[Signatures](#i3c757579422f48b3bc2d0ee3dccfaafe_115)</u> | <u>[25](#i3c757579422f48b3bc2d0ee3dccfaafe_115)</u> |

---

**CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS**

This Quarterly Report on Form 10-Q contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995, as amended. We also may provide oral or written forward-looking statements in other materials we release to the public. Words such as "will," "may," "could," "would," "should," "anticipates," "believes," "estimates," "expects," "plans," "intends," and similar expressions are intended to identify these forward-looking statements but are not the exclusive means of identifying them. These forward-looking statements reflect the current views of our management as of the filing date of this Quarterly Report on Form 10-Q; however, various risks, uncertainties, contingencies, and other factors, some of which are beyond our control, are difficult to predict and could cause our actual results, performance, or achievements to differ materially from those expressed in, or implied by, these statements.

We assume no obligation to update, amend, or clarify publicly any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by securities laws. In light of these risks, uncertainties, and assumptions, the forward-looking events discussed in this Quarterly Report on Form 10-Q might not occur.

For further information regarding these and other factors, risks, and uncertainties that could cause actual results to differ, we refer you to the risk factors set forth in Item 1A "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2025.

------

**PART I&nbsp;&nbsp;&nbsp;&nbsp; FINANCIAL INFORMATION**

**ITEM 1.&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements**

**NPK International Inc.**

**Condensed Consolidated Balance Sheets**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| (In thousands, except share data) | **March 31, 2026** | **December 31, 2025** |
| **ASSETS** |  |  |
| &nbsp;&nbsp;&nbsp;Cash and cash equivalents | $6537 | $5140 |
| &nbsp;&nbsp;&nbsp;Receivables, net of allowance of $358 and $330, respectively | 61624 | 59806 |
| &nbsp;&nbsp;&nbsp;Inventories | 9336 | 11500 |
| &nbsp;&nbsp;&nbsp;Prepaid expenses and other current assets | 4819 | 5046 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total current assets | 82316 | 81492 |
| &nbsp;&nbsp;&nbsp;Property, plant and equipment, net | 239777 | 233048 |
| &nbsp;&nbsp;&nbsp;Operating lease assets | 10244 | 11195 |
| &nbsp;&nbsp;&nbsp;Goodwill | 75507 | 76341 |
| &nbsp;&nbsp;&nbsp;Other intangible assets, net | 19678 | 21297 |
| &nbsp;&nbsp;&nbsp;Deferred tax assets | 2207 | 5535 |
| &nbsp;&nbsp;&nbsp;Other assets | 8161 | 12850 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total assets | $437890 | $441758 |
| **LIABILITIES AND STOCKHOLDERS' EQUITY** |  |  |
| &nbsp;&nbsp;&nbsp;Current debt | $4833 | $5170 |
| &nbsp;&nbsp;&nbsp;Accounts payable | 23103 | 22327 |
| &nbsp;&nbsp;&nbsp;Accrued liabilities | 24107 | 29647 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total current liabilities | 52043 | 57144 |
| &nbsp;&nbsp;&nbsp;Long-term debt, less current portion | 5721 | 11692 |
| &nbsp;&nbsp;&nbsp;Noncurrent operating lease liabilities | 9054 | 9877 |
| &nbsp;&nbsp;&nbsp;Deferred tax liabilities | 7168 | 7476 |
| &nbsp;&nbsp;&nbsp;Other noncurrent liabilities | 4120 | 4413 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities | 78106 | 90602 |
| &nbsp;&nbsp;&nbsp;Commitments and contingencies (Note 8) |  |  |
| &nbsp;&nbsp;&nbsp;Common stock, $0.01 par value (200,000,000 shares authorized and 89,969,464 and 90,134,477 shares issued, respectively) | 900 | 902 |
| &nbsp;&nbsp;&nbsp;Paid-in capital | 489996 | 489632 |
| &nbsp;&nbsp;&nbsp;Accumulated other comprehensive loss | (2968) | (1610) |
| &nbsp;&nbsp;&nbsp;Retained earnings (deficit) | (90069) | (100527) |
| &nbsp;&nbsp;&nbsp;Treasury stock, at cost (5,537,255 and 5,616,798 shares, respectively) | (38075) | (37241) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total stockholders' equity | 359784 | 351156 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities and stockholders' equity | $437890 | $441758 |

---

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

------

**NPK International Inc.**

**Condensed Consolidated Statements of Operations**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
| (In thousands, except per share data) | **2026** | **2025** |
| Revenues | $75070 | $64777 |
| Cost of revenues | 47884 | 39527 |
| Selling, general and administrative expenses | 13191 | 11746 |
| Other operating (income) loss, net | (428) | (24) |
| &nbsp;&nbsp;&nbsp;&nbsp;Operating income from continuing operations | 14423 | 13528 |
| Foreign currency exchange (gain) loss | 145 | (314) |
| Interest (income) expense, net | 323 | (48) |
| &nbsp;&nbsp;&nbsp;&nbsp;Income from continuing operations before income taxes | 13955 | 13890 |
| Provision for income taxes from continuing operations | 3597 | 3515 |
| &nbsp;&nbsp;&nbsp;&nbsp;Income from continuing operations | 10358 | 10375 |
| &nbsp;&nbsp;&nbsp;&nbsp;Income (loss) from discontinued operations | 100 | (372) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net income | $10458 | $10003 |
| Income (loss) per common share - basic |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Income from continuing operations | $0.12 | $0.12 |
| &nbsp;&nbsp;&nbsp;&nbsp;Income (loss) from discontinued operations |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Net income | $0.12 | $0.12 |
| Income (loss) per common share - diluted |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Income from continuing operations | $0.12 | $0.12 |
| &nbsp;&nbsp;&nbsp;&nbsp;Income (loss) from discontinued operations |  | (0.01) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net income | $0.12 | $0.11 |

---

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

------

**NPK International Inc.**

**Condensed Consolidated Statements of Comprehensive Income (Loss)**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
| (In thousands) | **2026** | **2025** |
| Net income | $10458 | $10003 |
| &nbsp;&nbsp;&nbsp;Foreign currency translation adjustments | (1358) | 159 |
| Comprehensive income | $9100 | $10162 |

---

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

------

**NPK International Inc.**

**Condensed Consolidated Statements of Stockholders**' **Equity**

**(Unaudited)**

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| (In thousands) | **Common Stock** | **Paid-In Capital** | **Accumulated Other Comprehensive Loss** | **Retained Earnings (Deficit)** | **Treasury Stock** | **Total** |
| Balance at December 31, 2024 | $1117 | $633239 | $(2871) | $(139466) | $(165524) | $326495 |
| &nbsp;&nbsp;&nbsp;&nbsp;Net income |  |  |  | 10003 |  | 10003 |
| &nbsp;&nbsp;&nbsp;&nbsp;Employee stock options, restricted stock and employee stock purchase plan |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation expense |  | 1185 |  |  |  | 1185 |
| &nbsp;&nbsp;&nbsp;&nbsp;Treasury shares purchased at cost |  |  |  |  | (10956) | (10956) |
| &nbsp;&nbsp;&nbsp;&nbsp;Foreign currency translation, net of tax |  |  | 159 |  |  | 159 |
| Balance at March 31, 2025 | $1117 | $634424 | $(2712) | $(129463) | $(176480) | $326886 |
| Balance at December 31, 2025 | $902 | $489632 | $(1610) | $(100527) | $(37241) | $351156 |
| &nbsp;&nbsp;&nbsp;&nbsp;Net income |  |  |  | 10458 |  | 10458 |
| &nbsp;&nbsp;&nbsp;&nbsp;Employee stock options, restricted stock and employee stock purchase plan |  | (264) |  |  | 755 | 491 |
| &nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation expense |  | 1720 |  |  |  | 1720 |
| &nbsp;&nbsp;&nbsp;&nbsp;Treasury shares purchased at cost |  |  |  |  | (2683) | (2683) |
| &nbsp;&nbsp;&nbsp;&nbsp;Treasury shares cancelled | (2) | (1092) |  |  | 1094 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Foreign currency translation, net of tax |  |  | (1358) |  |  | (1358) |
| Balance at March 31, 2026 | $900 | $489996 | $(2968) | $(90069) | $(38075) | $359784 |

---

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

------

**NPK International Inc.**

**Condensed Consolidated Statements of Cash Flows**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| (In thousands) | **2026** | **2025** |
| **Cash flows from operating activities:** |  |  |
| Net income | $10458 | $10003 |
| Adjustments to reconcile net income to net cash provided by operations: |  |  |
| &nbsp;&nbsp;&nbsp;Gain on divestitures | (500) |  |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization | 8167 | 5802 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation expense | 1720 | 1185 |
| &nbsp;&nbsp;&nbsp;Provision for deferred income taxes | 3207 | 2917 |
| &nbsp;&nbsp;&nbsp;Credit loss expense | 29 | 6 |
| &nbsp;&nbsp;&nbsp;Gain on sale of assets | (621) | (823) |
| &nbsp;&nbsp;&nbsp;Amortization of original issue discount and debt issuance costs | 79 | 69 |
| &nbsp;&nbsp;&nbsp;Change in assets and liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Increase in receivables | (3068) | (10015) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Decrease in inventories | 2159 | 5088 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Increase in other assets | (41) | (256) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Increase (decrease) in accounts payable | 3715 | (522) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Decrease in accrued liabilities and other | (4193) | (4626) |
| **Net cash provided by operating activities** | 21111 | 8828 |
| **Cash flows from investing activities:** |  |  |
| &nbsp;&nbsp;&nbsp;Capital expenditures | (16684) | (10011) |
| &nbsp;&nbsp;&nbsp;Proceeds from divestitures | 5490 | 10665 |
| &nbsp;&nbsp;&nbsp;Proceeds from sale of property, plant and equipment | 483 | 1818 |
| &nbsp;&nbsp;&nbsp;Other investing activities |  | 2946 |
| **Net cash provided by (used in) investing activities** | (10711) | 5418 |
| **Cash flows from financing activities:** |  |  |
| &nbsp;&nbsp;&nbsp;Borrowings on lines of credit | 12100 |  |
| &nbsp;&nbsp;&nbsp;Payments on lines of credit | (17400) |  |
| &nbsp;&nbsp;&nbsp;Purchases of treasury stock | (2683) | (10810) |
| &nbsp;&nbsp;&nbsp;Proceeds from employee stock plans | 491 |  |
| &nbsp;&nbsp;&nbsp;Other financing activities | (1428) | (865) |
| **Net cash used in financing activities** | (8920) | (11675) |
| Effect of exchange rate changes on cash | (83) | 26 |
| Net increase in cash, cash equivalents, and restricted cash | 1397 | 2597 |
| Cash, cash equivalents, and restricted cash at beginning of period | 5140 | 18237 |
| Cash, cash equivalents, and restricted cash at end of period | $6537 | $20834 |

---

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

------

**NPK INTERNATIONAL INC.** 

**NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS**

**Note 1 – Basis of Presentation and Significant Accounting Policies**

NPK International Inc. is a temporary worksite access solutions company that manufactures, sells, and rents recyclable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. We serve customers in various markets including power transmission, oil and natural gas exploration and production, pipeline, renewable energy, petrochemical, construction and other industries within the United States and United Kingdom. We also sell our manufactured recyclable composite mats to customers around the world, with power transmission being the primary end-market.

The accompanying unaudited condensed consolidated financial statements of NPK International Inc. and our wholly-owned subsidiaries, which we collectively refer to as "NPK," the "Company," "we," "our," or "us," have been prepared in accordance with Rule 10-01 of Regulation S-X for interim financial statements required to be filed with the Securities and Exchange Commission, and do not include all information and footnotes required by the accounting principles generally accepted in the United States ("U.S. GAAP") for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2025. Our fiscal year end is December 31 and our first quarter represents the three-month period ended March 31. The results of operations for the first quarter of 2026 are not necessarily indicative of the results to be expected for the entire year. Unless otherwise noted, all currency amounts are stated in U.S. dollars.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary to present fairly our financial position as of March 31, 2026 and our results of operations and cash flows for the first quarter of 2026 and 2025. All adjustments are of a normal recurring nature. Our balance sheet at December 31, 2025 is derived from the audited consolidated financial statements at that date.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. For further information, see Note 1 in our Annual Report on Form 10-K for the year ended December 31, 2025.

------

**New Accounting Pronouncements**

**Standards Not Yet Adopted**

***Disaggregation of Income Statement Expenses.*** In November 2024, the FASB issued new guidance which requires entities to disclose additional information about specific expense categories, such as employee compensation and depreciation. This guidance will be effective for us for years beginning after December 15, 2026, and interim periods beginning after December 15, 2027, with early adoption permitted on either a prospective or retrospective basis. We are currently evaluating the impact of the new guidance on our consolidated financial statements and related disclosures.

**Note 2 – Business Combinations and Discontinued Operations**

<u>Acquisition of Grassform Plant Hire Limited</u>

On November 24, 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.

The estimated purchase price for this acquisition is $49.5 million, as reduced by $0.7 million during the first quarter of 2026, or $45.3 million net of cash acquired, with $42.1 million funded at closing in 2025 with cash on hand and borrowings under the Credit Facility. The acquisition is subject to customary post-closing adjustments pursuant to completion accounts and certain other adjustment mechanisms. Additional consideration will be payable in 2026 based upon Grassform's trailing twelve-month performance through February 28, 2026.

The Grassform acquisition has been recorded using the acquisition method of accounting and accordingly, assets acquired and liabilities assumed were recorded at their estimated fair values as of the acquisition date. The acquisition resulted in the recognition of $12.5 million in other intangible assets, consisting of customer relationships and tradename. The customer relationships and tradename are finite-lived intangible assets that will be amortized over periods of 15 years and 10 years, respectively. The excess of the total consideration of $27.8 million was recorded as goodwill, which is not deductible for U.S. tax purposes. The fair values of the identifiable assets acquired and liabilities assumed were based on our estimates and assumptions using various market, income, and cost valuation approaches, which are classified within level 3 of the fair value hierarchy.

Depreciation and amortization for the first quarter of 2026 includes $1.5 million related to the acquired Grassform business.

The results of operations of Grassform are reported within the condensed consolidated statements of operations for the period subsequent to the date of the acquisition.

<u>Sale of Fluids Systems Business</u>

We previously operated a Fluids Systems business, which was historically reported as a separate operating segment, that provided drilling and completion fluids products and related technical services to customers for oil, natural gas, and geothermal projects. On September 13, 2024, we completed the sale of substantially all of the Company's Fluids Systems segment (the "Sale Transaction") to SCF Partners.

In the first quarter of 2026, we collected $5.0 million, plus applicable accrued interest, on a note receivable due from the Purchaser, as well as $0.5 million for certain pre-closing tax assets. As of March 31, 2026, approximately $1.3 million of net liabilities were included within the consolidated balance sheet, reflecting an estimated $2.1 million due to the Purchaser and $0.8 million due from the Purchaser.

Estimated liabilities due to the Purchaser includes payables of $0.6 million for pre-closing obligations attributable to the Fluids Systems business that are expected to be settled in 2026, as well as an $1.5 million estimated liability for contractual indemnifications related to various pre-closing contingencies of the Fluids Systems business. These estimated liabilities due to the Purchaser are included in accrued liabilities and other noncurrent liabilities in the condensed consolidated balance sheet. Estimated deferred consideration due from the Purchaser reflects the recovery of certain pre-closing assets, and are included in other receivables in the condensed consolidated balance sheet.

Our estimates for the fair value of liabilities due to the Purchaser and deferred consideration due from the Purchaser may change and any income or expense associated with such changes will be presented in discontinued operations. In the first quarter of 2026, we recognized a $0.5 million pre-tax gain on sale related to the resolution of certain contractual indemnifications related to the Sale Transaction. In addition, as part of the Sale Transaction, we retained the obligation to complete the closure of certain foreign subsidiaries that are no longer operational. We expect to continue to incur certain costs for these efforts until all such entities are closed.

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**Note 3 – Earnings Per Share**

The following table presents the reconciliation of the numerator and denominator for calculating net income per share:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands, except per share data) | **2026** | **2025** |
| **Numerator** |  |  |
| Income from continuing operations | $10358 | $10375 |
| Income (loss) from discontinued operations | 100 | (372) |
| Net income | $10458 | $10003 |
| **Denominator** |  |  |
| Weighted average common shares outstanding - basic | 84416 | 86057 |
| &nbsp;&nbsp;&nbsp;&nbsp;Dilutive effect of stock options and restricted stock awards | 1436 | 939 |
| Weighted average common shares outstanding - diluted | 85852 | 86996 |
| **Income (loss) per common share - basic:** |  |  |
| Income from continuing operations | $0.12 | $0.12 |
| Income (loss) from discontinued operations |  |  |
| Net income | $0.12 | $0.12 |
| **Income (loss) per common share - diluted:** |  |  |
| Income from continuing operations | $0.12 | $0.12 |
| Income (loss) from discontinued operations |  | (0.01) |
| Net income | $0.12 | $0.11 |

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We excluded the following weighted-average potential shares from the calculations of diluted net income (loss) per share during the applicable periods because their inclusion would have been anti-dilutive for continuing operations:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands) | **2026** | **2025** |
| Stock options and restricted stock awards |  | 302 |

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**Note 4 – Repurchase Program**

Our Board of Directors has authorized a securities repurchase program available for repurchases of our common stock.

Our repurchase program authorizes us to purchase outstanding shares of our common stock in the open market or as otherwise determined by management, subject to certain limitations under the Credit Facility (as defined in Note 7) and other factors. The repurchase program has no specific term. Repurchases are expected to be funded from operating cash flows, available cash on hand, and borrowings under our Credit Facility. As part of the share repurchase program, our management has been authorized to establish trading plans under Rule 10b5-1 of the Securities Exchange Act of 1934.

During the first quarter of 2026, we repurchased an aggregate of 0.2 million shares of our common stock under the repurchase program for a cost of $2.7 million. During the first quarter of 2025, we repurchased an aggregate of 1.8 million shares of our common stock under the repurchase program for a cost of $10.8 million.

As of March 31, 2026, we had $89.0 million of authorization remaining under the program.

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**Note 5 – Receivables**

Receivables consisted of the following:

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| | | |
|:---|:---|:---|
| (In thousands) | **March 31, 2026** | **December 31, 2025** |
| Trade receivables: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Gross trade receivables | $57672 | $53146 |
| &nbsp;&nbsp;&nbsp;&nbsp;Allowance for credit losses | (358) | (330) |
| Net trade receivables | 57314 | 52816 |
| Income tax receivables | 1134 | 1651 |
| Other receivables | 3176 | 5339 |
| Total receivables, net | $61624 | $59806 |

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Other receivables as of March 31, 2026 and December 31, 2025 included $0.8 million and $1.3 million, respectively, for amounts due from the Purchaser related to the Sale Transaction (see Note 2).

Changes in our allowance for credit losses were as follows:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands) | **2026** | **2025** |
| Balance at beginning of period | $330 | $948 |
| &nbsp;&nbsp;&nbsp;&nbsp;Credit loss expense | 29 | 6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Write-offs, net of recoveries | (1) | 10 |
| Balance at end of period | $358 | $964 |

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**Note 6 – Inventories**

Inventories consisted of the following:

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| | | |
|:---|:---|:---|
| (In thousands) | **March 31, 2026** | **December 31, 2025** |
| Raw materials | $4938 | $5337 |
| Finished goods | 4398 | 6163 |
| Total inventories | $9336 | $11500 |

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Raw materials consist primarily of resins and other materials used to manufacture composite mats, as well as materials that are consumed in providing spill containment and other services to our customers. Finished goods consist primarily of newly manufactured composite mats, which are available for deployment into our rental fleet or sale to customers.

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**Note 7 – Financing Arrangements and Fair Value of Financial Instruments**

Financing arrangements consisted of the following:

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| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **March 31, 2026** | **March 31, 2026** | **March 31, 2026** | **December 31, 2025** | **December 31, 2025** | **December 31, 2025** |
| (In thousands) | **Principal Amount** | **Unamortized Discount and Debt Issuance Costs** | **Total Debt** | **Principal Amount** | **Unamortized Discount and Debt Issuance Costs** | **Total Debt** |
| Credit Facility | $— | $— | $— | $5300 | $— | $5300 |
| Finance leases | 10554 |  | 10554 | 11562 |  | 11562 |
| Total debt | 10554 |  | 10554 | 16862 |  | 16862 |
| Less: current portion | (4833) |  | (4833) | (5170) |  | (5170) |
| Long-term debt | $5721 | $— | $5721 | $11692 | $— | $11692 |

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***Credit Facility.*** 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. The Credit Facility and the loans made under the Credit Facility are secured by a first priority lien on substantially all of the personal property of the Company and its significant U.S. subsidiaries as guarantors (subject to customary exceptions and exclusions). The Credit Facility will mature in June 2030.

As of March 31, 2026, we had no outstanding borrowings and $1.9 million in outstanding letters of credit, resulting in remaining availability of $148.1 million.

Under the terms of the Credit Facility, we may elect to borrow at a variable interest rate based on either the Term SOFR rate or an alternate base rate plus, in each case, a per annum applicable margin. The applicable margin will range from 1.75% to 2.25% for Term SOFR loans and 0.75% to 1.25% for alternate base rate loans, based on the consolidated leverage ratio (as defined in the Credit Facility) as of the last day of the most recent fiscal quarter. We are also required to pay a commitment fee on the unused portion of the Credit Facility ranging from 0.25% to 0.35% per annum based on the consolidated leverage ratio.

As of March 31, 2026, the applicable margin for borrowings under the Credit Facility was 1.75% for Term SOFR loans and 0.75% for alternate base rate loans, and the applicable commitment fee was 0.25% per annum.

The Credit Facility requires compliance with a maximum consolidated leverage ratio and a minimum consolidated fixed charge coverage ratio, each as defined in the Credit Facility. In addition, at our option, we may choose to increase the maximum consolidated leverage ratio for a certain period following a significant acquisition, subject to certain limitations, as defined in the Credit Facility. As of March 31, 2026, we were in compliance with required ratios.

The Credit Facility contains various customary representations, warranties and covenants that, among other things and subject to certain specified circumstances and exceptions, restrict or limit the ability of the Company and its subsidiaries to incur indebtedness (including guarantees), grant liens, make investments, pay dividends or distributions with respect to capital stock or make other restricted payments, make prepayments on other indebtedness, engage in mergers or other fundamental changes, dispose of property, or change the nature of their business.

The Credit Facility includes various events of default (subject to certain materiality thresholds and/or grace periods), including non-payment of principal, interest or fees, violation of covenants, inaccuracy of representations or warranties, cross-default to other material indebtedness, bankruptcy and insolvency events, invalidity or impairment of guarantees or security interests or invalidity of loan documents, certain ERISA events, unsatisfied or unstayed judgments and change of control.

***Other Financing Arrangements.*** We maintain finance leases primarily related to transportation equipment. During the first quarter of 2026, we entered into $0.5 million of new finance lease liabilities in exchange for leased assets.

In addition, at March 31, 2026, we had $6.7 million in outstanding letters of credit (inclusive of the amount outstanding under the Credit Facility as described above), performance bonds, and other guarantees.

***Fair Value of Financial Instruments.*** Our financial instruments include cash and cash equivalents, receivables, payables, and debt. We believe the carrying values of these instruments approximated their fair values at March 31, 2026 and December 31, 2025.

**Note 8 – Commitments and Contingencies**

In the ordinary course of conducting our business, we become involved in litigation and other claims from private party actions, as well as judicial and administrative proceedings involving governmental authorities at the federal, state, and

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local levels. In addition, in connection with the Sale Transaction, we have indemnified the Purchaser for certain pre-closing contingencies of the Fluids Systems business. While the outcome of litigation or other proceedings against us, including pre-closing contingencies of the Fluids Systems business, cannot be predicted with certainty, management does not expect that any loss resulting from such litigation or other proceedings, in excess of any amounts accrued or covered by insurance, will have a material adverse impact on our consolidated financial statements.

**Note 9 – Supplemental Disclosures to the Statements of Cash Flows**

Supplemental disclosures to the statements of cash flows are presented below:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands) | **2026** | **2025** |
| Cash paid (received) for interest | $249 | $(109) |

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| | |
|:---|:---|
| | **First Quarter** |
| (In thousands) | **2026** |
| Cash paid (received) for income taxes (net of refunds) |  |
| U.S. Federal | $— |
| U.S. State <sup>(1)</sup> | (156) |
| Foreign <sup>(2)</sup> | (230) |
| Total | $(386) |

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<sup>(1)</sup> Includes a $0.1 million refund in Florida.

<sup>(2)</sup> Includes a $0.2 million refund in Brazil.

Cash received for income taxes (net of payments) was $58,000 for the first quarter of 2025.

Cash, cash equivalents, and restricted cash in the statements of cash flows consisted of the following:

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| | | |
|:---|:---|:---|
| (In thousands) | **March 31, 2026** | **December 31, 2025** |
| Cash and cash equivalents | $6537 | $5140 |
| Restricted cash (included in prepaid expenses and other current assets) |  |  |
| Cash, cash equivalents, and restricted cash | $6537 | $5140 |

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**Note 10 – Segment Data**

We have one reportable segment. The Company's chief operating decision maker ("CODM"), its Chief Executive Officer, allocates resources and assesses financial performance on a consolidated basis. The Company's operations, currently in the United States and United Kingdom, are substantially similar with respect to services provided, type of customers, and sourcing of materials. Resource allocations are based on the capacity of the Company's existing rental fleet, manufacturing facility and current status of operations, including projected demand for our products and services in the industries and locations we serve. Consolidated income from continuing operations as presented in the consolidated statements of operations is used to measure performance. As such, management has determined that the Company functions as a single operating segment, and reports as a single reportable segment.

The following table presents further disaggregated revenues by type:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands) | **2026** | **2025** |
| &nbsp;&nbsp;&nbsp;Rental revenues | $35625 | $28110 |
| &nbsp;&nbsp;&nbsp;Service revenues | 16328 | 15283 |
| &nbsp;&nbsp;&nbsp;Product sales revenues | 23117 | 21384 |
| **Total revenues** | $75070 | $64777 |

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Service revenues in the table above include certain services performed that are directly related to mat rental operations. Such services include rental mat installation and removal, freight (hauling of rental mats), and direct labor related to such activities, and totaled $15.9 million and $13.1 million for the first quarter of 2026 and 2025, respectively.

The following table presents further disaggregated revenues by geography, based on the country in which the sale originates:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands) | **2026** | **2025** |
| &nbsp;&nbsp;&nbsp;United States | $65880 | $60675 |
| &nbsp;&nbsp;&nbsp;United Kingdom | 9190 | 4102 |
| **Total revenues** | $75070 | $64777 |

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The following table presents disaggregated expense information:

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| | | |
|:---|:---|:---|
| | **First Quarter** | **First Quarter** |
| (In thousands) | **2026** | **2025** |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization - Included in cost of revenues | $7630 | $5347 |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization - Included in selling, general and administrative expenses | 537 | 455 |
| **Total depreciation and amortization** | $8167 | $5802 |

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**ITEM 2.&nbsp;&nbsp;&nbsp;&nbsp;Management**'**s Discussion and Analysis of Financial Condition and Results of Operations**

The following discussion of our financial condition, results of operations, liquidity, and capital resources should be read in conjunction with the unaudited condensed consolidated financial statements and notes thereto included in this report as well as our Annual Report on Form 10-K for the year ended December 31, 2025. Our first quarter represents the three-month period ended March 31. Unless otherwise noted, all currency amounts are stated in U.S. dollars. The reference to a "Note" herein refers to the accompanying Notes to Unaudited Condensed Consolidated Financial Statements contained in Item 1 "Financial Statements."

**Overview**

NPK International Inc. ("NPK," the "Company," "we," "our," or "us") is a temporary worksite access solutions company that manufactures, sells, and rents recyclable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. In the first quarter of 2026, 69% of our revenues were generated from the rental of our recyclable composite matting systems, along with related site construction and services to customers in various markets including power transmission, oil and natural gas exploration and production, pipeline, renewable energy, petrochemical, construction and other industries within the United States and United Kingdom. The remaining 31% of our first quarter of 2026 revenues were generated from the sale of our manufactured recyclable composite mats to customers around the world, with power transmission being the primary end-market.

**2026 Priorities**

Our long-term strategy includes key foundational elements that are intended to enhance long-term shareholder value creation:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *<u>Accelerate Organic Growth</u>* – We seek to accelerate revenue growth through the expansion of our rental business, which includes a combination of geographic expansion to new growth territories, primarily within the U.S., while also expanding customer market share within currently-served markets. As part of this effort, we have placed a particular emphasis on penetrating larger-scale, longer-term (six months or longer) projects, which we believe will help drive improvements in revenue stability and operational efficiency. Due in part to the success of our efforts, rental and service revenues increased $9 million, or 20%, year-over-year for the first quarter of 2026, including a 27% increase in rental revenues. We prioritize investment capital to support our organic growth objective, where over the past several years, we have seen the strong market adoption of our specialty rental products and differentiated service offering. During the first quarter of 2026, we made net investments of $14.6 million in the expansion of our composite rental fleet, expanding our owned composite mat rental fleet by 4% in the quarter. Further, with our revenue growth and the favorable macro-environment, we have also accelerated our manufacturing capacity expansion planning efforts. In March 2026, our Board of Directors approved management's plan to expand our composite mat production capacity by approximately 50% over current levels. We expect to invest $40 million to $45 million over the next five quarters to complete this expansion, with the additional capacity expected to come online by mid-2027.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *<u>Pursue Inorganic Growth</u>* – We seek to accelerate our growth and enhance shareholder value through strategically-aligned inorganic actions, leveraging our scale to increase our value and relevance to customers, and we continually evaluate inorganic opportunities that align with our objectives. 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 with a fleet of over 20,000 composite mats. Our U.K. operations generated $9.2 million of revenues during the first quarter of 2026, a $5.1 million increase over the first quarter of 2025, with the substantial majority of the increase driven by the Grassform acquisition.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *<u>Drive Operational Efficiency</u>* – We are focused on efficiency improvements and operating cost optimization across every aspect of our business. Throughout 2025, we continued to evaluate and execute actions intended to streamline the organization and our cost structure, driving improvements in profitability. SG&A as a percentage of revenues was 17.6% for the first quarter of 2026 compared to 18.1% for the first quarter of 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *<u>Enhance Return on Capital</u>* – We are committed to maintaining a strong balance sheet, prioritizing organic investment to expand our rental business while evaluating accretive inorganic growth opportunities to accelerate growth and returning excess cash generation via programmatic share repurchases. During the first quarter of 2026, we utilized $2.7 million to repurchase 0.2 million shares under our share repurchase program.

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**First Quarter of 2026 Compared to First Quarter of 2025** 

**<u>Consolidated Results of Operations</u>**

Summarized results of operations for the first quarter of 2026 compared to the first quarter of 2025 are as follows:

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| | | | |
|:---|:---|:---|:---|
| | **First Quarter** | **First Quarter** | **2026 vs 2025** |
| (In thousands) | **2026** | **2025** | $**%** |
| Revenues | $75070 | $64777 | 16% |
| Cost of revenues | 47884 | 39527 | 21% |
| Selling, general and administrative expenses | 13191 | 11746 | 12% |
| Other operating (income) loss, net | (428) | (24) | NM |
| &nbsp;&nbsp;&nbsp;&nbsp;Operating income from continuing operations | 14423 | 13528 | 7% |
| Foreign currency exchange (gain) loss | 145 | (314) |  |
| Interest (income) expense, net | 323 | (48) |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Income from continuing operations before income taxes | 13955 | 13890 |  |
| Provision for income taxes from continuing operations | 3597 | 3515 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Income from continuing operations | 10358 | 10375 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Income (loss) from discontinued operations, net of tax | 100 | (372) |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Net income | $10458 | $10003 |  |

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The following table presents further disaggregated revenues by type:

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| | | | |
|:---|:---|:---|:---|
| | **First Quarter** | **First Quarter** | **2026 vs 2025** |
| (In thousands) | **2026** | **2025** | $% |
| **Revenues** |  |  |  |
| &nbsp;&nbsp;&nbsp;Rental and service revenues | $51953 | $43393 | 20% |
| &nbsp;&nbsp;&nbsp;Product sales revenues | 23117 | 21384 | 8% |
| **Total revenues** | $75070 | $64777 | 16% |

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| | | | | |
|:---|:---|:---|:---|:---|
| | **First Quarter** | **First Quarter** | **Change** | **Change** |
| | **2026** | **2025** | | |
| **Total gross profit margin** | 36.2% | 39.0% | (280) | bps |

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***Revenues***

Revenues increased 16% to $75.1 million for the first quarter of 2026, compared to $64.8 million for the first quarter of 2025, including a 20% increase in rental and service revenues and an 8% increase in product sales revenues. Rental revenues increased $7.5 million (27%), primarily due to higher rental volume driven by our organic growth efforts along with the contribution from the Grassform acquisition, as well as modestly higher pricing. Service revenues increased $1.0 million (7%), primarily attributable to the increased level of customer rental projects, though at a lower rate than rental revenues, due primarily to the higher mix of larger-scale, longer term rental projects. Product sales revenues increased $1.7 million (8%), reflecting continued strength in customer adoption of manufactured composite matting products relative to timber-based products that represent the primary solution used for temporary worksite access in the market. During the first quarter of 2026, nearly 80% of our product sales revenues were derived from utility companies.

***Cost of revenues***

Cost of revenues increased 21% to $47.9 million for the first quarter of 2026 (36.2% gross profit margin), compared to $39.5 million for the first quarter of 2025 (39.0% gross profit margin), primarily driven by the 16% increase in revenues described above. The decline in gross profit margin is primarily attributable to the impact of approximately $3.5 million of cross-rental costs required to meet customer rental demand, modestly lower rental fleet utilization attributable to the timing of

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large-scale projects, and expenses associated with our manufacturing expansion effort, partially offset by improved rental pricing and manufacturing cost leverage for product sales.

***Selling, general and administrative expenses***

Selling, general and administrative expenses increased to $13.2 million for the first quarter of 2026, which includes $0.7 million attributable to the Grassform acquisition, compared to $11.7 million for the first quarter of 2025. Selling, general and administrative expenses as a percentage of revenues was 17.6% for the first quarter of 2026 compared to 18.1% for the first quarter of 2025.

***Other operating (income) loss, net***

Other operating (income) loss, net primarily includes gains and losses on sales of non-rental assets.

***Foreign currency exchange***

Foreign currency exchange for the first quarter of 2026 and 2025 reflects the impact of currency translation on assets and liabilities (including intercompany balances) that are denominated in currencies other than functional currencies, principally related to our U.K. operations.

***Interest (income) expense, net***

Interest expense, net was minimal for the first quarter of 2026 and 2025.

***Provision for income taxes from continuing operations***

The provision for income taxes from continuing operations was $3.6 million for the first quarter of 2026, reflecting an effective tax rate of 26%, compared to $3.5 million for the first quarter of 2025, reflecting an effective tax rate of 25%.

***Income (loss) from discontinued operations, net of tax***

Income (loss) from discontinued operations, net of tax reflects the former Fluids Systems segment, which was sold in the third quarter of 2024. In the first quarter of 2026, we recognized a $0.5 million pre-tax gain on sale related to the resolution of certain contractual indemnifications related to the Sale Transaction, which was partially offset by costs associated with the transaction as well as related to the closure of certain foreign subsidiaries that are no longer operational.

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**Liquidity and Capital Resources**

Net cash provided by operating activities was $21.1 million for the first quarter of 2026 compared to $8.8 million for the first quarter of 2025. Net income adjusted for non-cash items provided cash of $22.5 million in the first quarter of 2026, compared to $19.2 million in 2025, while changes in working capital used cash of $1.4 million in first quarter of 2026, compared to $10.3 million in 2025.

Net cash used in investing activities was $10.7 million for the first quarter of 2026, which includes $16.7 million in capital expenditures partially offset by $5.5 million in additional proceeds from the sale of the Fluids Systems business. The substantial majority of our capital expenditures for the first quarter of 2026 and 2025 were directed to expanding our mat rental fleet. Net cash provided by investing activities was $5.4 million for the first quarter of 2025, which includes $10.7 million in additional proceeds from the sale of the Fluids Systems business partially offset by $10.0 million in capital expenditures.

Net cash used in financing activities was $8.9 million for the first quarter of 2026, which primarily reflects net repayments on our Credit Facility and other existing financing arrangements as well as $2.7 million in share purchases under our repurchase program. Net cash used in financing activities was $11.7 million for the first quarter of 2025.

We primarily manage our liquidity utilizing cash on hand and availability under our Credit Facility and other existing financing arrangements.

We expect future working capital requirements for our operations will generally fluctuate directionally with revenues, and we expect net capital expenditures in 2026 to be $75 million to $90 million, which includes $35 million to $45 million in the expansion of our rental fleet and $30 million to $35 million for the manufacturing expansion project. We also expect to use a portion of our existing liquidity to pursue inorganic growth opportunities and return value to our shareholders through share repurchases. We expect cash on hand and cash generated by operations, as well as the projected availability under our Credit Facility and other existing financing arrangements, to be adequate to fund our current operations during the next 12 months.

Our capitalization is as follows:

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| | | |
|:---|:---|:---|
| (In thousands) | **March 31, 2026** | **December 31, 2025** |
| Credit Facility | $— | $5300 |
| Other debt | 10554 | 11562 |
| Unamortized discount and debt issuance costs |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Total debt | $10554 | $16862 |
| &nbsp;&nbsp;&nbsp;&nbsp;Stockholders' equity | 359784 | 351156 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total capitalization | $370338 | $368018 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total debt to capitalization | 2.8% | 4.6% |

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***Credit Facility.*** 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. The Credit Facility and the loans made under the Credit Facility are secured by a first priority lien on substantially all of the personal property of the Company and its significant U.S. subsidiaries as guarantors (subject to customary exceptions and exclusions). The Credit Facility will mature in June 2030.

As of March 31, 2026, we had no outstanding borrowings and $1.9 million in outstanding letters of credit, resulting in remaining availability of $148.1 million.

Under the terms of the Credit Facility, we may elect to borrow at a variable interest rate based on either the Term SOFR rate or an alternate base rate plus, in each case, a per annum applicable margin. The applicable margin will range from 1.75% to 2.25% for Term SOFR loans and 0.75% to 1.25% for alternate base rate loans, based on the consolidated leverage ratio (as defined in the Credit Facility) as of the last day of the most recent fiscal quarter. We are also required to pay a commitment fee on the unused portion of the Credit Facility ranging from 0.25% to 0.35% per annum based on the consolidated leverage ratio.

As of March 31, 2026, the applicable margin for borrowings under the Credit Facility was 1.75% for Term SOFR loans and 0.75% for alternate base rate loans, and the applicable commitment fee was 0.25% per annum.

The Credit Facility requires compliance with a maximum consolidated leverage ratio and a minimum consolidated fixed charge coverage ratio, each as defined in the Credit Facility. In addition, at our option, we may choose to increase the maximum consolidated leverage ratio for a certain period following a significant acquisition, subject to certain limitations, as defined in the Credit Facility. As of March 31, 2026, we were in compliance with required ratios.

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The Credit Facility contains various customary representations, warranties and covenants that, among other things and subject to certain specified circumstances and exceptions, restrict or limit the ability of the Company and its subsidiaries to incur indebtedness (including guarantees), grant liens, make investments, pay dividends or distributions with respect to capital stock or make other restricted payments, make prepayments on other indebtedness, engage in mergers or other fundamental changes, dispose of property, or change the nature of their business.

The Credit Facility includes various events of default (subject to certain materiality thresholds and/or grace periods), including non-payment of principal, interest or fees, violation of covenants, inaccuracy of representations or warranties, cross-default to other material indebtedness, bankruptcy and insolvency events, invalidity or impairment of guarantees or security interests or invalidity of loan documents, certain ERISA events, unsatisfied or unstayed judgments and change of control.

***Other Financing Arrangements.*** We maintain finance leases primarily related to transportation equipment. During the first quarter of 2026, we entered into $0.5 million of new finance lease liabilities in exchange for leased assets.

In addition, at March 31, 2026, we had $6.7 million in outstanding letters of credit (inclusive of the amount outstanding under the Credit Facility as described above), performance bonds, and other guarantees.

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***Critical Accounting Estimates and Policies***

Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP"), which requires management to make estimates and assumptions that affect the reported amounts and disclosures. Significant estimates used in preparing our consolidated financial statements include estimated cash flows and fair values used for impairments of long-lived assets, including goodwill and other intangibles, and valuation allowances for deferred tax assets. Our estimates are based on historical experience and on our future expectations that we believe to be reasonable. The combination of these factors forms the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from our current estimates and those differences may be material.

For additional discussion of our critical accounting estimates and policies, see "Management's Discussion and Analysis of Financial Condition and Results of Operations" included in our Annual Report on Form 10-K for the year ended December 31, 2025. Our critical accounting estimates and policies have not materially changed since December 31, 2025.

------

**ITEM 3.&nbsp;&nbsp;&nbsp;&nbsp;Quantitative and Qualitative Disclosures About Market Risk**

We are exposed to market risk from changes in interest rates and changes in foreign currency exchange rates. A discussion of our primary market risk exposure in financial instruments is presented below.

**Interest Rate Risk**

We are primarily exposed to interest rate risk through our Credit Facility, which is subject to variable interest rates as determined by the debt agreement. At March 31, 2026, we had no borrowings under our Credit Facility.

**Foreign Currency Risk**

Our principal foreign operations are currently conducted in the U.K., which contributed approximately 12% of our consolidated revenues for the first quarter of 2026. We have foreign currency exchange risks associated with these operations, which are conducted principally in British pounds. Historically, we have not used off-balance sheet financial hedging instruments to manage foreign currency risks when we enter into a transaction denominated in a currency other than our local currencies.

**ITEM 4.&nbsp;&nbsp;&nbsp;&nbsp;Controls and Procedures**

**Evaluation of Disclosure Controls and Procedures**

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 (the "Exchange Act")) as of the end of the period covered by this quarterly report in accordance with Rules 13a-15 and 15d-15 under the Exchange Act. Based on such evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of March 31, 2026, the end of the period covered by this quarterly report.

**Changes in Internal Control Over Financial Reporting**

We are currently undertaking a significant ERP implementation to upgrade our information technology platforms and business processes. The implementation is occurring in phases, and during the first quarter of 2026, we implemented various modules and functionality, impacting the majority of our operations within the United States.

As a result of this implementation, we have certain changes to our processes and procedures, which, in turn, will result in changes to our internal control over financial reporting. This implementation was subject to various testing and review procedures prior to execution. We believe that the conversion to and implementation of this new system will further strengthen our existing internal control over financial reporting by enhancing certain business processes.

Other than the changes described above, there were no changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2026 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

------

**PART II&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; OTHER INFORMATION**

**ITEM 1.&nbsp;&nbsp;&nbsp;&nbsp;Legal Proceedings**

In the ordinary course of conducting our business, we become involved in litigation and other claims from private party actions, as well as judicial and administrative proceedings involving governmental authorities at the federal, state, and local levels. In addition, in connection with the Sale Transaction, we have indemnified the Purchaser for certain pre-closing contingencies of the Fluids Systems business. While the outcome of litigation or other proceedings against us, including pre-closing contingencies of the Fluids Systems business, cannot be predicted with certainty, management does not expect that any loss resulting from such litigation or other proceedings, in excess of any amounts accrued or covered by insurance, will have a material adverse impact on our consolidated financial statements.

**ITEM 1A.&nbsp;&nbsp;&nbsp;&nbsp;Risk Factors**

There have been no material changes during the period ended March 31, 2026 to our "Risk Factors" as discussed in Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2025.

------

**ITEM 2.&nbsp;&nbsp;&nbsp;&nbsp;Unregistered Sales of Equity Securities and Use of Proceeds**

a) Not applicable

b) Not applicable

c) The following table details our repurchases of shares of our common stock for the three months ended March 31, 2026:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Period** | **Total Number of Shares Purchased** | **Average Price Paid Per Share** | **Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs** | **Maximum Approximate Dollar Value of Shares that May Yet be Purchased Under Plans or Programs ($ in Millions)** |
| January 2026 |  | $— |  | $91.7 |
| February 2026 |  | $— |  | $91.7 |
| March 2026 | 199370 | $13.44 |  | $89.0 |
| Total | 199370 |  |  |  |

---

Our Board of Directors has authorized a securities repurchase program available for repurchases of our common stock. In April 2025, our Board of Directors increased the remaining authorization under the repurchase program to $100 million.

Our repurchase program authorizes us to purchase outstanding shares of our common stock in the open market or as otherwise determined by management, subject to certain limitations under the Credit Facility (as defined in Note 7) and other factors. The repurchase program has no specific term. Repurchases are expected to be funded from operating cash flows, available cash on hand, and borrowings under our Credit Facility. As part of the share repurchase program, our management has been authorized to establish trading plans under Rule 10b5-1 of the Securities Exchange Act of 1934. All shares purchased are held as treasury stock.

During the first quarter of 2026, we repurchased an aggregate of 0.2 million shares of our common stock under the repurchase program for a cost of $2.7 million. As of March 31, 2026, we had $89.0 million of authorization remaining under the program.

We did not purchase any shares surrendered in lieu of taxes under vesting of restricted shares during the three months ended March 31, 2026.

------

**ITEM 3.&nbsp;&nbsp;&nbsp;&nbsp;Defaults Upon Senior Securities**

None.

**ITEM 4.&nbsp;&nbsp;&nbsp;&nbsp;Mine Safety Disclosures**

Not applicable.

**ITEM 5.&nbsp;&nbsp;&nbsp;&nbsp;Other Information**

***Insider Trading Arrangements***

During the quarter ended March 31, 2026, no director or officer of the Company adopted or terminated any Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, as each term is defined in Item 408(a) of Regulation S-K, except as follows:

On March 4, 2026, Matthew Lanigan, the Company's President and Chief Executive Officer, adopted a Rule 10b5-1 trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act (a "10b5-1 Plan"). Mr. Lanigan's 10b5-1 Plan provides for the aggregate sale of up to 169,375 shares of the Company's common stock, commencing on June 3, 2026, and will be effective until September 30, 2026.

------

**ITEM 6.&nbsp;&nbsp;&nbsp;&nbsp;Exhibits**

The exhibits listed are filed as part of, or incorporated by reference into, this Quarterly Report on Form 10-Q.

---

| | |
|:---|:---|
| \*31.1 | <u>[Certification of Matthew S. Lanigan pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](a2026q110qexhibit311.htm)</u> |
| \*31.2 | <u>[Certification of Gregg S. Piontek pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](a2026q110qexhibit312.htm)</u> |
| \*\*32.1 | <u>[Certification of Matthew S. Lanigan pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](a2026q110qexhibit321.htm)</u> |
| \*\*32.2 | <u>[Certification of Gregg S. Piontek pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](a2026q110qexhibit322.htm)</u> |
| \*101.INS | XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document |
| \*101.SCH | Inline XBRL Schema Document |
| \*101.CAL | Inline XBRL Calculation Linkbase Document |
| \*101.DEF | Inline XBRL Definition Linkbase Document |
| \*101.LAB | Inline XBRL Label Linkbase Document |
| \*101.PRE | Inline XBRL Presentation Linkbase Document |
| \*104 | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) |

---

\*&nbsp;&nbsp;&nbsp;&nbsp; Filed herewith.

\*\* Furnished herewith.

------

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: May 1, 2026

---

| | |
|:---|:---|
| NPK International Inc. | NPK International Inc. |
| (Registrant) | (Registrant) |
| By: | /s/ Matthew S. Lanigan |
|  | Matthew S. Lanigan<br>President and Chief Executive Officer<br>(Principal Executive Officer) |

---

---

| | |
|:---|:---|
| By: | /s/ Gregg S. Piontek |
|  | Gregg S. Piontek<br>Senior Vice President and Chief Financial Officer<br>(Principal Financial and Accounting Officer) |

---

## Exhibit 31.1

**Exhibit 31.1**

**Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002**

I, Matthew S. Lanigan, certify that:

1. &nbsp;&nbsp;&nbsp;&nbsp;I have reviewed this quarterly report on Form 10-Q of NPK International Inc.;

2. &nbsp;&nbsp;&nbsp;&nbsp;Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. &nbsp;&nbsp;&nbsp;&nbsp;Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. &nbsp;&nbsp;&nbsp;&nbsp;The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) &nbsp;&nbsp;&nbsp;&nbsp;Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) &nbsp;&nbsp;&nbsp;&nbsp;Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) &nbsp;&nbsp;&nbsp;&nbsp;Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) &nbsp;&nbsp;&nbsp;&nbsp;Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. &nbsp;&nbsp;&nbsp;&nbsp;The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) &nbsp;&nbsp;&nbsp;&nbsp;All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) &nbsp;&nbsp;&nbsp;&nbsp;Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 1, 2026

---

| |
|:---|
| /s/ Matthew S. Lanigan |
| Matthew S. Lanigan |
| President and Chief Executive Officer |

---

## Exhibit 31.2

**Exhibit 31.2**

**Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002**

I, Gregg S. Piontek, certify that:

1. &nbsp;&nbsp;&nbsp;&nbsp;I have reviewed this quarterly report on Form 10-Q of NPK International Inc.;

2. &nbsp;&nbsp;&nbsp;&nbsp;Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. &nbsp;&nbsp;&nbsp;&nbsp;Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. &nbsp;&nbsp;&nbsp;&nbsp;The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) &nbsp;&nbsp;&nbsp;&nbsp;Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) &nbsp;&nbsp;&nbsp;&nbsp;Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) &nbsp;&nbsp;&nbsp;&nbsp;Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) &nbsp;&nbsp;&nbsp;&nbsp;Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. &nbsp;&nbsp;&nbsp;&nbsp;The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) &nbsp;&nbsp;&nbsp;&nbsp;All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) &nbsp;&nbsp;&nbsp;&nbsp;Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 1, 2026

---

| |
|:---|
| /s/ Gregg S. Piontek |
| Gregg S. Piontek |
| Senior Vice President and Chief Financial Officer |

---

## Exhibit 32.1

**Exhibit 32.1**

**Certification**

**Pursuant to 18 U.S.C. Section 1350**

**As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**

In connection with the Quarterly Report on Form 10-Q for the period ended March 31, 2026, of NPK International Inc. (the "Company"), as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Matthew S. Lanigan, President and Chief Executive Officer (Principal Executive Officer) of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 1, 2026

---

| |
|:---|
| /s/ Matthew S. Lanigan |
| Matthew S. Lanigan |
| President and Chief Executive Officer |

---

## Exhibit 32.2

**Exhibit 32.2**

**Certification**

**Pursuant to 18 U.S.C. Section 1350**

**As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**

In connection with the Quarterly Report on Form 10-Q for the period ended March 31, 2026, of NPK International Inc. (the "Company"), as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Gregg S. Piontek, Senior Vice President and Chief Financial Officer (Principal Financial Officer) of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 1, 2026

---

| |
|:---|
| /s/ Gregg S. Piontek&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |
| Gregg S. Piontek |
| Senior Vice President and Chief Financial Officer |

---

<br>