Harsco Corporation Investor Presentation — May 2022

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Investor Presentation

May -June 2022© 2022 Harsco Corporation. All Rights Reserved. This document and the information set forth herein are the property of Harsc o Corporation.SAFE HARBOR STATEMENT

This presentation does not constitute an offer to sell, or a solicitation of an offer to buy, any security and shall not cons titute an offer, solicitation or sale in any jurisdiction in which such offer, solicitation or sale would be

Forward -Looking Statements

The Company’s presentation contains forward -looking statements based on management’s current expectations, estimates and project ions. The nature of the Company's business and the many countries in which it

operates subject it to changing economic, competitive, regulatory and technological conditions, risks and uncertainties. In a ccordance with the "safe harbor" provisions of Section 27A of the Securities Act of 1933 and

Section 21E of the Securities Exchange Act of 1934, the Company provides the following cautionary remarks regarding important factors that, among others, could cause future results to differ materially from the results

contemplated by forward -looking statements, including the expectations and assumptions expressed or implied herein. Forward -look ing statements contained herein could include, among other things, statements about

management's confidence in and strategies for performance; expectations for new and existing products, technologies and oppor tunities; and expectations regarding growth, sales, cash flows, and earnings. Forward -

looking statements can be identified by the use of such terms as "may," "could," "expect," "anticipate," "intend," "believe," "likely," "estimate," "outlook," "plan" or other comparable terms.

Factors that could cause actual results to differ, perhaps materially, from those implied by forward -looking statements include, but are not limited to: (1) changes in the worldwide business environment in which the

Company operates, including changes in general economic conditions or changes due to COVID -19 and governmental and market reacti ons to COVID -19; (2) changes in currency exchange rates, interest rates, commodity

and fuel costs and capital costs; (3) changes in the performance of equity and bond markets that could affect, among other thing s, the valuation of the assets in the Company's pension plans and the accounting for pension

assets, liabilities and expenses; (4) changes in governmental laws and regulations, including environmental, occupational health and safety, tax and import tariff standards and amounts; (5) market and competitive changes,

including pricing pressures, market demand and acceptance for new products, services and technologies; (6) the Company's inab ility or failure to protect its intellectual property rights from infringement in one or more of