Participation Notification by Blackrock Inc.

Brussels, December 1, 2020, 08:30 CET - According to Belgian transparency legislation (Law of May 2, 2007), BlackRock Inc. (55 East 52nd Street, New York, NY, 10055, U.S.A.) recently sent to Solvay the following transparency notification indicating that it crossed the threshold of 3%. Here is a summary of the move:

Date on which the threshold was crossed	Voting rights after the transaction	Equivalent financial instruments after the transaction	Total
November 25, 2020	2.61%	0.39%	3.00%

The latest notification, dated November 26, 2020, contains the following information:

• Reason for the notification: acquisition or disposal of voting securities or voting rights

• Notified by: BlackRock Inc. (55 East 52nd Street, New York, NY, 10055, U.S.A.)

• Date on which the threshold is crossed: November 25, 2020

• Threshold of direct voting rights crossed: 3% upwards

• Denominator: 105,876,416

• Additional information: The disclosure obligation arose due to voting rights attached to shares for BlackRock, Inc. going above 3%.

Transparency notifications and the full chain of controlled undertakings through which the holding is effectively held is available on the Investor Relations Section of Solvay's website.

Attachments

• Solvay_2020-11-25_Issuer_signed

• 20201201_transparency declaration Blackrock-EN