Entegris : Investor and Analyst Meeting

2021 Investor and Analyst Update

December 1, 2021

Agenda

	Topic	Speaker
1	Capturing Growth	Bertrand Loy
President and CEO
2	Financial Strength and Flexibility	Greg Graves
EVP and CFO
3	Q&A

2

Safe Harbor

This presentation contains, and management may make, 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 include statements related to future period guidance; future revenue, EBITDA, non-GAAP earnings per share, adjusted EBITDA margin, return on invested capital and other financial metrics; the Company's performance relative to its markets, including the drivers of such performance; market and technology trends, including the duration, scale and drivers of any growth trends; the Company's investments to capture growth and related impacts therefrom; the impact, financial or otherwise, of any organizational changes; the development of new products or new applications for existing products and the success of their introductions, including revenue goals for such products or applications; the Company's capital allocation strategy, which may be modified at any time for any reason, including share repurchases, dividends, debt repayments and potential acquisitions; the impact of the acquisitions the Company makes or has made and commercial partnerships the Company establishes or has established; the Company's ability to execute on its strategies; the Company's corporate social responsibility program and related goals; and other matters. These forward-looking statements are based on current management expectations and assumptions only as of their respective dates, are not guarantees of future performance and 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. These risks and uncertainties include, but are not limited to, risks related to the COVID-19 pandemic on the global economy and financial markets, as well as on the Company, our customers and suppliers, which may impact our sales, gross margin, customer demand and our ability to supply our products to our customers; raw material shortages, supply and labor constraints and price increases; weakening of global and/or regional economic conditions, generally or specifically in the semiconductor industry, which could decrease the demand for the Company's products and solutions; the Company's ability to meet rapid demand shifts; the Company's ability to continue technological innovation and introduce new products to meet customers' rapidly changing requirements; the Company's concentrated customer base; the Company's ability to identify, complete and integrate acquisitions, joint ventures or other transactions; the Company's ability to effectively implement any organizational changes; the Company's ability to protect and enforce intellectual property rights; operational, political and legal risks of the Company's international operations; the Company's dependence on sole source and limited source suppliers; the increasing complexity of certain manufacturing processes; changes in government regulations of the countries in which the Company operates, including the imposition of tariffs, export controls and other trade laws and restrictions and changes to foreign and national security policy, especially as they relate to China; fluctuation of currency exchange rates; fluctuations in the market price of the Company's stock; the level of, and obligations associated with, the Company's indebtedness; and other risk factors and additional information described in the Company's filings with the Securities and Exchange Commission, including under the heading "Risks Factors" in Item 1A of the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2020, filed on February 5, 2021, and in the Company's other periodic filings. The Company assumes no obligation to update any forward-looking statements or information, which speak as of their respective dates.

This presentation contains references to "EBITDA," "Adjusted EBITDA Margin," "Adjusted Operating Margin" and "Non-GAAP Earnings per Share" that are not presented in accordance GAAP. The non-GAAP financial measures should not be considered in isolation or as a substitute for GAAP financial measures but should instead be read in conjunction with the GAAP financial measures. Further information with respect to and reconciliations of such measures to the

most directly comparable GAAP financial measure can be found attached to this presentation.

3

Capturing Growth

Bertrand Loy

President and CEO

4

Entegris at a Glance

Founded	2021E Revenue	Headquarters	Team Members
1966	$2.25B1	Billerica, MA	6,600+

One Platform - Three Divisions2	Sales by Customer Type3
~90% semiconductor
Microcontamination	Non-Semi
Control (MC)	Semi			Fabs
Advanced Materials	9%	Foundry/Logic
Handling (AMH)	Dist./Other
30%	12%			69%
40%	Semi
	Engineering 4%			46%
	16%			31%
	OEMs
32%	3%	11%	Memory
Specialty Chemicals &	Wafer		Chemical
Engineered Materials	Growers
(SCEM)			Manufacturers

Our Mission

To help our customers improve their productivity, performance and technology by providing enhanced materials and process solutions for the most advanced manufacturing environments

• Assumes midpoint of guidance for 2021 (provided on 10/26/21). 2 Percentage of Entegris revenue (2021 estimate). Revenue includes inter-segment sales which are

• eliminated in consolidation. Inter-segment sales represent approximately 2%. 3 Q1-Q3 2021.