Enpro Inc.

13. Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) by component (after tax) for the three months ended March 31, 2025 are as follows:

Changes in accumulated other comprehensive income (loss) by component (after tax) for the three months ended March 31, 2024 are as follows:

Reclassifications out of accumulated other comprehensive income (loss) for the three months ended March 31, 2025 and March 31, 2024 are as follows:

14. Commitments and Contingencies

General

A description of certain environmental and other legal matters relating to certain of our subsidiaries is included in this section. In addition to the matters noted herein, we are from time to time subject to, and are presently involved in, other litigation and legal proceedings arising in the ordinary course of business. We believe the outcome of such other litigation and legal proceedings will not have a material adverse effect on our financial condition, results of operations and cash flows. Expenses for administrative and legal proceedings are recorded when incurred.

Environmental

Our facilities and operations are subject to federal, state and local environmental and occupational health and safety laws and regulations of the U.S. and foreign countries. We take a proactive approach in our efforts to comply with these laws and regulations as they relate to our manufacturing operations and in proposing and implementing any remedial plans that may be necessary. We also regularly conduct comprehensive environmental, health and safety audits at our facilities to maintain compliance and improve operational efficiency.

Although we believe past operations were in substantial compliance with the then applicable regulations, we or one or more of our subsidiaries are involved with various investigation and remediation activities at 21 sites. In addition to these 21 sites, the United States Environmental Protection Agency (the "EPA") has provided us notice that Enpro has potential responsibility atone additional site where one of our subsidiaries formerly conducted business operations but no longer does. We have responded to the EPA that we do not have responsibility at that site and are awaiting the EPA's response. At 11 of the 21 sites, the future cost of investigation or remediation is expected to be less than $500,000. At 20 of the 21 sites, one or more of our subsidiaries (or an entity that merged with and into one of our subsidiaries) formerly conducted business operations but no longer do. We continue to conduct manufacturing operations atone site.

Our policy is to accrue environmental investigation and remediation costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. For sites with multiple future projected cost scenarios for identified feasible investigation and remediation options where no one estimate is more likely than all the others, our policy is to accrue the lowest estimate among the range of estimates. The measurement of the liability is based on an evaluation of currently available facts with respect to each individual situation and takes into consideration factors such as existing technology, presently enacted laws and regulations and prior experience in the remediation of similar contaminated sites. Liabilities are established for all sites based on these factors. As assessments and remediation progress at individual sites, these liabilities are reviewed and adjusted to reflect additional technical data and legal information. As of March 31, 2025 and December 31, 2024, we had recorded liabilities aggregating $40.2 million and $40.7 million, respectively, in other liabilities for estimated future expenditures relating to environmental contingencies. The current portion of our aggregate environmental liability included in accrued liabilities was $11.9 million at March 31, 2025. These amounts have been recorded on an undiscounted basis in the Consolidated Balance Sheets. Given the uncertainties regarding the status of laws, regulations, enforcement policies, the impact of other parties potentially being fully or partially liable, technology and information related to individual sites, we do not believe it is possible to develop an estimate of the range of reasonably possible environmental loss in excess of our recorded liabilities.

We believe that our accruals for specific environmental liabilities are adequate based on currently available information. Based upon limited information regarding any incremental remediation or other actions that may be required at these sites, we cannot estimate any further loss or a reasonably possible range of loss related to these matters. Actual costs to be incurred in future periods may vary from estimates because of the inherent uncertainties in evaluating environmental exposures due to unknown and changing conditions, changing government regulations and legal standards regarding liability.

Lower Passaic River Study Area

Based on our prior ownership of Crucible Steel Corporation a/k/a Crucible, Inc. (“Crucible”), we may have additional contingent liabilities in one or more significant environmental matters. One such matter, which is included in the 21 sites referred to above, is the Lower Passaic River Study Area of the Diamond Alkali Superfund Site in New Jersey. The Lower Passaic River Study Area includes a 17-mile tidal portion of the Passaic River stretching from the river's mouth at Newark Bay to Dundee Dam in Garfield, New Jersey. Crucible operated a steel mill abutting the Passaic River in Harrison, New Jersey from the 1930s until 1974, which was one of many industrial operations on the river dating back to the 1800s. Certain contingent environmental liabilities related to this site were retained by a predecessor of EnPro Holdings when it sold a majority interest in Crucible Materials Corporation (the successor of Crucible) in 1985. The EPA notified our subsidiary in September 2003 that it is a potentially responsible party (“PRP”) for Superfund response actions in the Lower Passaic River Study Area.

EnPro Holdings and approximately 70 of the numerous other PRPs, known as the Cooperating Parties Group, are parties to a May 2007 Administrative Order on Consent with the EPA to perform a Remedial Investigation/Feasibility Study (“RI/FS”) of the contaminants in the Lower Passaic River Study Area. In September 2018, EnPro Holdings withdrew from the Cooperating Parties Group but remains a party to the May 2007 Administrative Order on Consent. The RI/FS was completed and submitted to the EPA at the end of April 2015. The RI/FS recommends a targeted dredge and cap remedy with monitored natural recovery and adaptive management for the Lower Passaic River Study Area. The cost of such remedy is estimated to be $726 million.

Previously, on April 11, 2014, the EPA released its Focused Feasibility Study (the “FFS”) with its proposed plan for remediating the lower eight miles of the Lower Passaic River Study Area, which is also referred to as Operating Unit 2 ("OU2"). The FFS calls for bank-to-bank dredging and capping of the riverbed of that portion of the river and estimates a range of the present value of aggregate remediation costs of approximately $953 million to approximately $1.73 billion, although estimates of the costs and the timing of costs are inherently imprecise. On March 3, 2016, the EPA issued the final Record of Decision ("ROD") as to the remedy for OU2, with the maximum estimated cost being reduced by the EPA from $1.73 billion to $1.38 billion, primarily due to a reduction in the amount of cubic yards of material that will be dredged. In October 2016, Occidental Chemical Corporation, the successor to the entity that operated the Diamond Alkali chemical manufacturing facility, reached an agreement with the EPA to develop the design for this proposed remedy at an estimated cost of $165 million. The EPA has estimated that it will take approximately four years to develop this design. On June 30, 2018, Occidental Chemical Corporation sued over 120 parties, including the Company, in the United States District Court for New Jersey seeking recovery of response costs under the Comprehensive Environmental Response, Compensation and Liability Act ("CERCLA").

On April 14, 2021, the EPA issued its proposed remedy for the remaining portions of the Lower Passaic River Study Area (i.e., the upper nine miles of the river) with an estimated present value cost of approximately $441 million. The proposed remedy would involve dredging and capping of the river sediment as an interim remedy followed by a period of monitoring to evaluate the response of the river system to the interim remedy.

When the EPA initiated the allocation process in 2017, it explained that a fair, carefully structured, information-based allocation was necessary to promote settlements. With the completion of the allocation process, in the second quarter of 2021 the EPA began settlement negotiations with the parties that participated in the allocation process, including EnPro Holdings, to resolve the settling parties’ liability as to the full 17-mile Lower Passaic River Study Area (including OU2). In September 2022, EnPro Holdings paid $5.9 million as part of a settlement between those parties and the EPA. The court approved and entered the settlement on December 18, 2024, and two parties have appealed the court's order. The payment will be held in escrow until all appeals have been resolved. Our reserve for the Lower Passaic River Study Area at March 31, 2025 was $0.7 million. Further adjustments to our reserve for the site are possible as new or additional information becomes available.

Except with respect to the Lower Passaic River Study Area, we are unable to estimate a reasonably possible range of loss related to any other contingent environmental liability based on our prior ownership of Crucible. See the section entitled “Crucible Steel Corporation a/k/a Crucible, Inc.” in this footnote for additional information.

Arizona Uranium Mines

EnPro Holdings has received notices from the EPA asserting that it is a potentially responsible party under the CERCLA as the successor to a former operator ofeight uranium mines in Arizona. The former operator conducted operations at the mines from 1954 to 1957. In the 1990s, remediation work performed by others at these sites consisted of capping the exposed areas of the mines. We have previously reserved amounts of probable loss associated with these mines, principally including the cost of the investigative work to be conducted at such mines. We entered into an Administrative Settlement Agreement and Order on Consent for Interim Removal Action with the EPA effective November 7, 2017 for the performance of this work. We entered into a First Modification of Original Administrative Settlement Agreement and Order on Consent effective July 8, 2022 for the performance of Engineering Evaluations and Cost Analyses of potential remedial options at each of the sites. In 2020, the EPA initiated group discussions with EnPro Holdings and other potentially responsible parties to resolve various technical issues, including the development of cleanup standards. Based on these discussions and subsequent discussions with other responsible parties with similar sites, we have concluded that further remedial work beyond maintenance of and minor repairs to the existing caps is probable, and we have evaluated the feasibility of various remediation scenarios. Our reserve at March 31, 2025 for this site was $12.1 million, which reflects the low end of the range of our reasonably likely liability with respect to these sites. We are not able at this time to estimate the upper end of a range of liability with respect to these sites.

On October 18, 2021, the United States District Court for the District of Arizona approved and entered a Consent Decree pursuant to which the U.S government will reimburse the Company for 35% of necessary costs of response, as defined in 42 U.S.C. section 9601(25), previously or to be in the future incurred by the Company which arise out of or in connection with releases or threatened releases of hazardous substances at or emanating from the mine sites. We expect future contributions of $3.1 million from the U.S. government towards remediation of the site. This amount was included in other assets in the accompanying consolidated balance sheet at March 31, 2025.

GGB Industrial Site Remediation Act (ISRA) Investigation and Cleanup

Under the agreement governing the November 2022 sale of GGB to The Timken Company, Enpro retained responsibility for compliance with New Jersey's Industrial Site Remediation Act ("ISRA") with respect totwo GGB facilities located in Thorofare, New Jersey, which are collectivelyone of the 21 sites referenced above. ISRA requires the environmental investigation and remediation of industrial properties in association with the closure, sale or transfer of operations. All work under ISRA must be conducted under the direction of a Licensed Site Remediation Professional (“LSRP”) certified by a state licensing board. On September 9, 2024, the Company’s LSRP submitted Preliminary Assessment and Site Investigation Reports (“PA/SI Reports”) for this site to the state agency, confirming that the preliminary assessment identified, among other things, concentrations of certain per- and polyfluoroalkyl substances (“PFAS”) in soil and groundwater at the site. The PA/SI Reports also include the LSRP’s recommendations to further investigate the PFAS impacts in soil and groundwater at the site. Our reserve at March 31, 2025 for the site was $2.7 million. These reserves are based on currently available facts about the site and may be revised as investigation of the site continues in accordance with the ISRA requirements, or based on future technical consultation with the state agency.

Water Valley

In connection with operation of a former operation of a division of EnPro Holdings, the Company has been implementing and managing a solution to clean trichloroethylene ("TCE") soil and groundwater contamination at the location of a former operation in Water Valley, Mississippi (the “Water Valley Facility”). The Water Valley Facility was operated by a corporate predecessor of EnPro Holdings from 1972 through 1996, prior to Enpro’s formation in 2002. By 1987, TCE was no longer used at the Water Valley Facility. In 1996, Enpro Holdings’ corporate predecessor sold the division, including the Water Valley Facility, to BorgWarner. In 2021, BorgWarner sold the Water Valley Facility to Solero Technologies, which currently operates it.

On June 4, 2024, eight former employees at the Water Valley Facility filed a complaint in the United States District Court, Northern District of Mississippi against Enpro Inc., EnPro Holdings and others alleging personal injury, nuisance, and other claims related to alleged exposure to TCE. In response to an order of the Federal Court issued on March 17, 2025 dismissing certain of the former employees’ claims, on March 31, 2025, theeight former employees filed an amended complaint with the Federal Court re-alleging certain of their claims. Legal counsel for theeight claimants have indicated in preliminary discussions with the Company's legal counsel that they have identified a significant number of additional potential claimants in this matter for whom they may file complaints. At this time, the Company does not have further information regarding additional potential claimants and no such additional claims have been filed.

Our reserve at March 31, 2025 for the site was $8.3 million for on-going cleanup and monitoring costs and operation of a permanent vapor intrusion remediation system. Given the early stage of the litigation, Enpro cannot estimate a range of reasonably possible outcomes of the pending claims of theeight former employees or any other claims based on similar allegations, andno reserves have been accrued for the litigation at March 31, 2025.

Other Environmental

In addition to thefour sites discussed above, we have additional reserves of $16.4 million for the remaining 17 sites. These amounts represent a reasonable estimate of our probable future costs to remediate these sites given the facts and circumstances known at March 31, 2025.

Crucible Steel Corporation a/k/a Crucible, Inc.

Crucible, which was engaged primarily in the manufacture and distribution of high technology specialty metal products, was a wholly owned subsidiary of EnPro Holdings until 1983 when its assets and liabilities were distributed to a new subsidiary, Crucible Materials Corporation. EnPro Holdings sold a majority of the outstanding shares of Crucible Materials Corporation in 1985 and divested its remaining minority interest in 2004. Crucible Materials Corporation filed for Chapter 11 bankruptcy protection in May 2009 and is no longer conducting operations.

We have certain ongoing obligations, which are included in other liabilities in our Consolidated Balance Sheets, including workers’ compensation, retiree medical and other retiree benefit matters, in addition to those mentioned previously related to EnPro Holdings' period of ownership of Crucible. Based on EnPro Holdings' prior ownership of Crucible, we may have certain additional contingent liabilities, including liabilities in one or more significant environmental matters included in the matters discussed in “Environmental” above. We are investigating these matters. Except with respect to those matters for which we have an accrued liability as discussed in "Environmental" above, we are unable to estimate a reasonably possible range of loss related to these contingent liabilities.

Warranties

We provide warranties on many of our products. The specific terms and conditions of these warranties vary depending on the product and the market in which the product is sold. We record a liability based upon estimates of the costs we may incur under our warranties after a review of historical warranty experience and information about specific warranty claims. Adjustments are made to the liability as claims data, historical experience, and trends result in changes to our estimate.

Changes in the product warranty liability for the three months ended March 31, 2025 and 2024 are as follows:

15. Acquisitions

Acquisition of business

On January 29, 2024, Enpro acquired all of the equity securities of Advanced Micro Instruments, Inc. ("AMI"), a privately held company. AMI, based in Costa Mesa, California, is a leading provider of highly-engineered, application-specific analyzers and sensing technologies that monitor critical parameters to maintain infrastructure integrity, enable process efficiency, enhance safety, and facilitate the clean energy transition. AMI is included within the Sealing Technologies segment.

The following unaudited pro forma condensed consolidated financial results of operations for the three months ended March 31, 2024 are presented as if the acquisition had been completed prior to 2024:

These amounts have been calculated after applying our accounting policies and adjusting the results of AMI to reflect the additional depreciation and amortization that would have been charged assuming the fair value adjustments to intangible assets had been applied prior to 2024. These pro forma financial results have been prepared for comparative purposes only and do not reflect the effect of any potential synergies as a result of the integration of AMI. The pro forma information does not purport to be indicative of the results of operations that actually would have resulted had the acquisition of AMI occurred prior to 2024, or of future results of Enpro Inc.

Acquisition of non-controlling interests of Enpro subsidiaries

In connection with our acquisition of Alluxa in October 2020, three Alluxa executives (the "Alluxa Executives") received rollover equity interests in the form of approximately 7% of the total equity interest of an entity we formed for the purpose of acquiring Alluxa (the "Alluxa Acquisition Subsidiary"). Pursuant to the limited liability operating agreement (the "Alluxa LLC Agreement") that was entered into with the completion of the transaction, each Alluxa Executive had the right to sell to us, and we had the right to purchase from each Alluxa Executive (collectively, the "Put and Call Rights"), one-third of the Alluxa Executive equity interests in the Alluxa Acquisition Subsidiary during each of three exercise periods in 2024, 2025 and 2026, with any amount not sold or purchased in a prior exercise period being carried forward to the subsequent exercise periods. In January 2024, we agreed with the Alluxa Executives to change the terms of the Put and Call Rights so that all outstanding equity interests could be acquired in 2024. In February of 2024, we acquired all outstanding equity interests in the Alluxa Acquisition Subsidiary for $17.9 million, which was the minimum fixed price set in the Alluxa LLC Agreement. As this transaction was for the acquisition of all remaining shares of a consolidated subsidiary with no change in control, it was recorded within shareholder's equity and as a financing cash flow in the Consolidated Statement of Cash Flows. As of the balance sheet date, Enpro is the sole owner of Alluxa.

16. Subsequent Event

On April 9, 2025, we entered into a Second Amendment to Third Amended and Restated Credit Agreement dated as of April 9, 2025 (the “Amended Credit Facility Agreement”) to amend the Credit Agreement. The Amended Credit Facility Agreement provides for a Revolving Credit Facility of up to $800.0 million, which will mature on April 9, 2030. On April 9, 2025, in connection with our entry into the Amended Credit Facility Agreement, we repaid the remaining outstanding principal amount of borrowings outstanding under the Term Loan A-2 Facility funded by borrowings under the Revolving Credit Facility and $59.8 million of available cash. The Amended Credit Facility Agreement provides that we may seek incremental term loans and/or additional revolving credit commitments in an amount equal to the greater of $275.0 million and 100% of consolidated EBITDA for the most recently ended four-quarter period for which we have reported financial results, plus additional amounts based on a consolidated senior secured leverage ratio. Any incremental term loans will be subject to prepayment with the net cash proceeds of non-permitted debt issuances and with the net cash proceeds of certain asset sales and casualty or condemnation events not reinvested in our business or applied to prepay such term loans within a specified period.

Borrowings under the Revolving Credit Facility, at our option, bear interest at either (1) an alternate base rate (the highest of (a) the federal funds effective rate plus 0.50%, (b) the prime rate of Bank of America, N.A., and (c) the one-month Term SOFR rate plus 1.00%) or (2) the Term SOFR rate for the applicable interest period plus, in each case, an applicable margin percentage, which initially is 1.375% for Term SOFR borrowings and 0.375% for alternate base rate borrowings and is subject to incremental increase or decrease based on a consolidated total net leverage ratio. In addition, a commitment fee accrues with respect to the unused amount of the Revolving Credit Facility at an annual rate of 0.175% initially, which rate is also subject to incremental increase or decrease based on a consolidated total net leverage ratio.

Enpro Inc. and EnPro Holdings are the permitted borrowers under the Amended Credit Facility Agreement. We have the ability to add wholly owned foreign subsidiaries as borrowers under the Revolving Credit Facility. Each of our domestic, consolidated subsidiaries (subject to certain exclusions) is required to guarantee the obligations of the borrowers under the Amended Credit Facility Agreement and, subject to the permitted exceptions, each of the Company’s existing domestic subsidiaries has entered into the Amended Credit Facility Agreement to provide such a guarantee.

Borrowings under the Amended Credit Facility Agreement are secured by a first-priority pledge of certain assets. The Amended Credit Facility Agreement contains certain financial covenants and required financial ratios including a maximum consolidated total net leverage ratio and a minimum consolidated interest coverage ratio as defined in the Amended Credit Facility Agreement.

The following is management’s discussion and analysis of certain significant factors that have affected our financial condition, cash flows and operating results during the periods included in the accompanying unaudited consolidated financial statements and the related notes. You should read this in conjunction with those financial statements and the audited consolidated financial statements and related notes included in our annual report on Form 10-K for the fiscal year ended December 31, 2024.

Forward-Looking Information

This quarterly report on Form 10-Q includes statements that reflect projections or expectations of the future financial condition, results of operations and business of Enpro that are subject to risk and uncertainty. We believe those statements to be “forward-looking” statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. When used in this report, the words “may,” “hope,” “will,” “should,” “expect,” “plan,” “anticipate,” “intend,” “believe,” “estimate,” “predict,” “potential,” “continue,” “likely,” and other expressions generally identify forward-looking statements.

We cannot guarantee actual results or events will not differ materially from those projected, estimated, assigned or anticipated in any of the forward-looking statements contained in this report. Important factors that could result in those differences include those specifically noted in the forward-looking statements and those identified in Item 1A, “Risk Factors” of our annual report on Form 10-K for the year ended December 31, 2024, which include:

•economic conditions in the markets served by our businesses and the businesses of our customers, some of which are cyclical and experience periodic downturns and may be affected by the imposition or threat of imposition of tariffs;

•the impact of geopolitical activity on those markets, including instabilities associated with the armed conflict in Ukraine, the armed conflicts in the Middle East and any conflict or threat of conflict that may affect Taiwan;

•uncertainties with respect to the imposition, or threat of imposition, of government tariffs, including tariffs imposed in response to the significant tariffs announced by the U.S. government in 2025, including the broad tariffs announced in April 2025, and retaliatory tariffs announced in response thereto, such as those announced by the Chinese and Canadian governments;

•uncertainties with respect to the imposition of government embargoes, , such as “anti-dumping” duties applicable to classes of products, and import or export licensing requirements, as well as the imposition of trade sanctions against a class of products imported from or sold and exported to, or the loss of “normal trade relations” status with, countries in which we conduct business, which could significantly increase our cost of products or otherwise reduce our sales and harm our business;

•uncertainties with respect to prices and availability of raw materials, including as a result of instabilities from geopolitical conflicts and the imposition of tariffs;

•uncertainties with respect to our ability to achieve anticipated growth within the semiconductor, life sciences, and other technology-enabled markets, including uncertainties with respect to receipt of CHIPS Act support and the timing of completion of our new Arizona facility;

•the impact of fluctuations in relevant foreign currency exchange rates or unanticipated increases in applicable interest rates;

•unanticipated delays or problems in introducing new products;

•the impact of any labor disputes;

•announcements by competitors of new products, services or technological innovations;

•changes in our pricing policies or the pricing policies of our competitors;

•risks related to the reliance of our Advanced Surface Technologies segment on a small number of significant customers;

•uncertainties with respect to our ability to identify and complete business acquisitions consistent with our strategy and to successfully integrate any businesses that we acquire; and

•uncertainties with respect to the amount of any payments required to satisfy contingent liabilities, including those related to discontinued operations, other divested businesses and discontinued operations of our predecessors, including liabilities for certain products, environmental matters, employee benefit and statutory severance obligations and other matters.

We caution investors not to place undue reliance on our forward-looking statements, which speak only as of the date on which such statements were made.

Whenever you read or hear any subsequent written or oral forward-looking statements attributed to us or any person acting on our behalf, you should keep in mind the cautionary statements contained or referred to in this section. We do not undertake any obligation to release publicly any revisions to these forward-looking statements to reflect events or circumstances after the date of this report or to reflect the occurrence of unanticipated events.

Non-GAAP Financial Information

In our discussion of our outlook and results of operations, we utilize financial measures that have not been prepared in conformity with generally accepted accounting principles in the United States ("GAAP"). They include adjusted net income, adjusted diluted earnings per share, adjusted earnings before interest, taxes, depreciation, and amortization ("adjusted EBITDA"), and total adjusted segment EBITDA. Tables showing the reconciliation of these non-GAAP financial measures to the comparable GAAP measures are included in "—Results of Operations" and "—Reconciliations of Non-GAAP Financial Measures to the Comparable GAAP Measures"

We believe these non-GAAP metrics are commonly used financial measures for investors to evaluate our operating performance and, when read in conjunction with our consolidated financial statements, present a useful tool to evaluate our ongoing operations and performance from period to period. In addition, these non-GAAP measures are some of the factors we use in internal evaluations of the overall performance of our businesses. We acknowledge that there are many items that impact our reported results and the adjustments reflected in these non-GAAP measures are not intended to present all items that may have impacted these results. In addition, these non-GAAP measures we use are not necessarily comparable to similarly titled measures used by other companies.

Overview

Overview. Enpro is a leading-edge industrial technology company focused on critical applications across a diverse group of growing end markets such as semiconductor, industrial process, commercial vehicle, sustainable power generation, aerospace, food and pharmaceuticals, photonics, and life sciences. We have 15 primary manufacturing and service facilities located in 8 countries, including the United States. Enpro is a leader in applied engineering and designs, develops, manufactures, and markets proprietary, value-added products and solutions that safeguard a variety of critical environments.

Over the past several years, we have executed several strategic initiatives to focus the portfolio of businesses where we offer proprietary, industrial technology-related products and solutions with high barriers to entry, compelling margins, strong cash flow, and perpetual recurring/aftermarket revenue in markets with favorable secular tailwinds.

We manage our business as two segments: a Sealing Technologies segment and an Advanced Surface Technologies segment.

Our Sealing Technologies segment engineers and manufactures value-added products and solutions that safeguard a variety of critical environments, including: metallic, non-metallic and composite material gaskets; dynamic seals; compression packing; elastomeric components; custom-engineered mechanical seals used in diverse applications; hydraulic components; test, measurement and sensing applications; sanitary gaskets; hoses and fittings for hygienic process industries; fluid transfer products for the pharmaceutical and biopharmaceutical industries; and commercial vehicle solutions used in wheel-end and suspension components that customers rely upon to ensure safety on our roadways.

These products are used in a variety of markets, including chemical and petrochemical processing, nuclear energy, hydrogen, natural gas, food and biopharmaceutical processing, primary metal manufacturing, mining, water and waste treatment, commercial vehicle, aerospace (including commercial space), medical, filtration and semiconductor fabrication. In all these industries, the performance and durability of our proprietary products and solutions are vital for the safety and environmental protection of our customers’ processes. Many of our products and solutions are used in highly demanding applications, often in harsh environments, where the cost of failure is extremely high relative to the cost of our offerings to our customers. These environments include those where extreme temperatures, extreme pressures, corrosive agents, strict tolerances, or worn equipment create challenges for product performance. Sealing Technologies offers customers widely recognized applied engineering, innovation, process know- how and enduring reliability, driving a lasting aftermarket for many of our products and solutions.

Our Advanced Surface Technologies ("AST") segment applies proprietary technologies, processes, and capabilities to deliver a highly differentiated suite of products and solutions for challenging applications in high-growth markets. The segment’s products and solutions are used in demanding environments requiring performance, precision and repeatability, with a low tolerance for failure. AST’s products and solutions include: (i) cleaning, coating, testing, refurbishment and verification for critical components and assemblies used in semiconductor manufacturing equipment, with meaningful exposures to state-of-the-art, advanced node chip applications; (ii) designing, manufacturing and selling specialized optical filters and proprietary thin-film coatings for the most challenging applications in the industrial technology, life sciences, and semiconductor markets; (iii) engineering and manufacturing complex front-end wafer processing sub-systems and new and refurbished electrostatic chuck pedestals for the semiconductor equipment industry; and (iv) engineering and manufacturing edge-welded metal bellows for the semiconductor equipment industry and critical applications in the space, aerospace and defense markets. In many instances, AST capabilities drive products and solutions that enable the performance of our customers’ high-value processes through an entire life cycle.

Acquisition

On January 29, 2024, Enpro acquired all of the equity securities of Advanced Micro Instruments, Inc. ("AMI"), a privately held company. AMI is a leading provider of highly-engineered, application-specific analyzers and sensing technologies that monitor critical parameters to maintain infrastructure integrity, enable process efficiency, enhance safety, and facilitate the clean energy transition and is based in Costa Mesa, California. AMI is included within the Sealing Technologies segment.

Highlights. Financial highlights for the three months ended March 31, 2025 and March 31, 2024 are as follows:

1 A reconciliation of non-GAAP measures to their respective GAAP measure is located in the Reconciliation of Non-GAAP Financial Measures to the Comparable GAAP Measure at the end of this section.