Solvay Investor Presentation — February 2022

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Full year 2021 Earnings

CEO and President of the Executive

Leadership Team of Solvay

2021 Results Dr. Ilham Kadri

CFO of Solvay Karim Hajjar

President of Soda Ash & Derivatives Philippe Kerhen

Full year 2021 Earnings Forenote

This presentation may contain forward-looking information. Forward-looking statements describe expectations, plans, strategies, goals, future events or intentions. The

achievement of forward-looking statements contained in this presentation is subject to risks and uncertainties relating to a number of factors, including general economic

factors, interest rate and foreign currency exchange rate fluctuations, changing market conditions, product competition, the nature of product development, impact of

acquisitions and divestitures, restructurings, products withdrawals, regulatory approval processes, all-in scenario of R&D projects and other unusual items. Consequently,

actual results or future events may differ materially from those expressed or implied by such forward-looking statements.

Should known or unknown risks or uncertainties materialize, or should our assumptions prove inaccurate, actual results could vary materially from those anticipated. The

Company undertakes no obligation to publicly update or revise any forward-looking statements.

This document does not constitute an offer to sell, or the solicitation of an offer to subscribe for or buy, any securities.

page 2 Full year 2021 Earnings Measures in place

●Safety measures for all our employees

●Responsible business travel policy

Solvay Solidarity Fund

●€6.4 million to date (individuals and

community support) Health and safety remain our top priority

page 3 Source: Solvay Confirmed

Full year 2021 Earnings Making meaningful progress on the climate

page 4 Target 2021 Comment Progress

Align GHG emissions with Paris Agreement and SBTi (a) 11Mt Achieved 11% in aggregate versus 6.6% Paris Agreement -14%

-11% structural Reduce by 30%

Phase out coal wherever renewable alternatives exist 27

exiting coal) Exit announced at Rheinberg in 2020, at Dombasle in

2021, first step at Devnya in 2022 -18%

(petajoule) Achieve 100%

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