ENTEGRIS INC

FORM 10-Q

TABLE OF CONTENTS

FOR THE QUARTER ENDED September 26, 2026

Cautionary Statements

This Quarterly Report on Form 10-Q (this “Quarterly Report”) contains “forward-looking statements”. The words “believe,” “expect,” “anticipate,” “intend,” “estimate,” “forecast,” “project,” “should,” “may,” “will,” “would” or the negative thereof and similar expressions are intended to identify such forward-looking statements. These forward-looking statements are based on current management expectations and assumptions only as of the date of this Quarterly Report. They are not guarantees of future performance and they involve substantial risks and uncertainties that are difficult to predict and that could cause actual results to differ materially from the results expressed in, or implied by, these forward-looking statements. Some factors that could cause actual results to differ include, but are not limited to the risks below:

Risks Related to Our Business and Industry

•Fluctuations in demand for semiconductors and volume of semiconductor manufacturing.

•Global economic uncertainty, including volatile financial markets, inflation and increased costs, trade wars, fluctuations in interest rates, economic recessions, and national debt and bank failures.

•Supply chain risks, including partial reliance on sole, single or limited source suppliers.

•Challenges inherent in operating a global business, including managing complex political, legal, regulatory, and operational environments across the jurisdictions in which the Company operates.

•The impact of export controls, economic sanctions and other similar restrictions.

•Customer concentration.

•The need for continuing innovation and introduction of new products.

•Manufacturing interruptions or delays and other operational disruptions.

•Information technology (“IT”) system failures, network disruptions, data breaches, and other cybersecurity threats.

•The impact of tariffs and a volatile trade environment.

•The use of hazardous materials in our operations.

•Goodwill impairment.

•Loss of key employees.

•Our ability to obtain, protect, and enforce intellectual property rights.

•Our use, and our competitors’ use, of AI

•Environmental, social, and governance commitments.

Risks Related to Government Regulation

•The impact of being subject to numerous rapidly evolving environmental laws and regulations across many jurisdictions.

•Risks related to the regulatory environment, including compliance costs and being subject to potentially inconsistent or conflicting regulations.

•Changes in taxation or adverse tax rulings.

•The impact of government incentives, including added operational complexity and competition.

Risks Related to Our Indebtedness

•The impact of our indebtedness, including our ability to obtain future financing.

•Risks related to our ability to generate sufficient cash to service our indebtedness.

•Restrictions on our operations as a result of the terms of the Amended Credit Agreement (as defined below) and the Indentures (as defined below).

Risks Related to Owning Our Common Stock

•The volatility of the price of our common stock.

•Changes in capital allocation strategy.

•Provisions in our charter documents and Delaware law may delay or prevent us from being acquired.

General Risks

•Significant competition.

•Our ability to successfully acquire or integrate other businesses, form joint ventures, or divest businesses.

•The impact of climate change, including changes in market dynamics and stakeholder expectations, and unexpected operational disruptions.

Other Risks

•The other factors and additional information described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission (the “SEC”) on February 11, 2026, including under the heading “Risk Factors” in Part I, Item 1A, and in the Company’s other periodic filings with the SEC.

Except as required under the federal securities laws and the rules and regulations of the SEC, the Company undertakes no obligation to update any forward-looking statements or information contained herein, which speak as of their respective dates.