Solvay SA

Declaration of Voting Results & Voting Rights Announcements • Feb 21, 2024

| Final

1) Status of the notification

2) Issuer

3) Reason for the notification

or disposal of voting securities or voting rights

4) Notification by

A parent undertaking or a controlling person

5) Persons subject to the notification requirement

Name	Address (for legal entities)
David Einhom	140 East 45th Street, 24th Floor, New York, NY 10023, USA
DME Advisors GP, Lie	Corporation Trust Center, 1209 Orange Street, Wilmington, DE 19801 USA
DME Capital Management, LP	Corporation Trust Center, 1209 Orange Street, Wilmington, DE 19801, USA
DME Advisors, LP	Corporation Trust Center, 1209 Orange Street, Wilmington, DE 19801, USA

6) Persons that dispose Of voting rights (only to be filled in if art. ⁷ of the Law applies)

Name Address (for legal entities) O Please continue entering the information in part II concerning the d {■ il ^I persons referred to in Sections ⁵ and ⁶ t <lrt II ^| 7) Date on which the threshold is crossed | 08/01/2024| (DD/MM/YYYY) 8) Threshold that is crossed (in%) | 3, o If the holding has fallen below the lowest threshold, you have the option of not entering any numbers in Section ¹⁰ 9) Denominator 105,876,416

10) Notified details

A) Voting rights	Previous notification		After the transaction
	# of voting rights	#of voting rights			% of voting rights
Holders of voting rights		Linked to securities	Not linked to the securities	Linked to securities	Not linked to the securities
David Einhorn		0		0.00%
DME Advisors, LP		132,170		0.12%
DME Capital Management, LP		3,052,430		2.88%

(gj^ Please enter the denominator before filling in the data

Subtotal	3,184,600		3.01%
TOTAL	3,184,600	0	3.01%	0.00%

Start with "groups" of holders. Add subtotals with S, and then finish with the persons who are "alone".

For groups, start with the ultimate controlling natural person or legal entity. The totals, subtotals and % will be updated once you have clicked on .

B) Equivalent financial instruments		After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiration date Exercise period or date	# of voting rights that may be acquired if the instrument is exercised	% of voting rights	Settlement
	TOTAL		0	0.00%
	The totals will be updated once you have clicked on
	TOTAL (A & B)			it of voting rights % of voting rights
		CALCULATE	3,184,600	3.01%

11) Full chain of controlled undertakings through which the holding is effectively held, if applicable

David Einhorn.		DME Advisors, LP and DME Capital Management, LP are controlled by DME Advisors GP, LLC. DME Advisors GP, LLC is controlled by

12) In case of proxy voting for only one GM

Holder	will cease to hold / will hold again	voting rights as of	(DD/MM/YYYY)
Additional information 13)

DME Advisors, LP and DME Capital Management, LP are the discretionary investment managers and exercise the voting rights at their discretioin in the absence of specific instructions.

	(DD/MM/YYYV)
		For security reasons, the unsigned form in xlsx format should be transmitted to trp.fln@fsma.be. You can do this manually OR if you have MS Outlook at your disposal via the "Save & Send" button.
		In addition, a signed copy in PDF format should also be transmitted.