Harsco Corporation Investor Presentation — August 2021

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© 2021 Harsco Corporation. All Rights Reserved. This document and the information set forth herein are the property of Harsc o Corporation.

Investor Presentation

August -September 2021

1© 2021 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 unlawful.

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 accordance with the "saf e 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 futur e results to differ materially from the results contemplated by forward -looking statements, including the

expectations and assumptions expressed or implied herein. Forward -looking 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 opportunities; 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 reactions 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 things, 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 a nd amounts; (5) market and competitive changes, including pricing pressures, market demand and acceptance