Solvay SA

Declaration of Voting Results & Voting Rights Announcements • Jul 3, 2025

Final

	Name SOLVAY
Identification number 0403-091-220

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25/06/2025 (DD/MM/YYYY)

3

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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.

105,876,416 Please enter the denominator before filling in the data

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
	TOTAL	0	0	0.00%	0.00%

The totals, subtotals and % will be updated once you have clicked on .

	Name	Address (for legal entities)
			+ A
	Please continue entering the information in part II concerning the persons referred to in Sections 5 and 6	Part II
7) Date on which the threshold is crossed

10) Notified details

8) Threshold that is crossed (in %)

If the holding has fallen below the lowest threshold, you have the option of not entering any numbers in Section 10

Name	Address (for legal entities)
Morgan Stanley	c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801, USA	+

9) Denominator

Transparency notification Form TR-1 BE PART I

1) Status of the notification

2) Issuer

3) Reason for the notification

5) Persons subject to the notification requirement

4) Notification by

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

A parent undertaking or a controlling person

Acquisition or disposal of financial instruments that are treated as voting securities

TOTAL (A & B)			# of voting rights % of voting rights
	CALCULATE	4,196,421	3.96%

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
Morgan Stanley & Co. International plc Equity Swap			27/11/2025 At any time	131,471	0.12%	cash	-
Morgan Stanley & Co. LLC	Right of recall over securities lending agreements	At any time	At any time	551,188	0.52%	physical	-
	Morgan Stanley & Co. International plc Right of recall over securities lending agreements	At any time	At any time	151,270	0.14%	physical	-
Prime Dealer Services Corp.	Right of recall over securities lending agreements	At any time	At any time	205,769	0.19%	physical	-
Morgan Stanley & Co. International plc Retail Structured Product - Note			28/04/2037 At any time	13,601	0.01%	cash	-
Morgan Stanley & Co. International plc Retail Structured Product - Note			02/07/2035 At any time	1,924	0.00%	cash	-
Morgan Stanley & Co. International plc Retail Structured Product - Note			16/07/2035 At any time	7,815	0.01%	cash	-
Morgan Stanley & Co. International plc Retail Structured Product - Note			17/08/2037 At any time	391,751	0.37%	cash	-
Morgan Stanley & Co. International plc Retail Structured Product - Note			02/11/2037 At any time	206,712	0.20%	cash	-
Morgan Stanley & Co. International plc Retail Structured Product - Note			01/10/2035 At any time	461,120	0.44%	cash	-
Morgan Stanley & Co. International plc Equity Call Options			19/12/2025 At any time	14,900	0.01%	cash	-
Morgan Stanley & Co. International plc Equity Call Options			19/06/2026 At any time	101,200	0.10%	cash	-
Morgan Stanley & Co. International plc Equity Call Options			18/12/2026 At any time	283,100	0.27%	cash	-
Morgan Stanley & Co. International plc Equity Put Options			15/08/2025 At any time	90,700	0.09%	cash	-
Morgan Stanley & Co. International plc Equity Put Options			19/09/2025 At any time	208,800	0.20%	cash	-
Morgan Stanley & Co. International plc Equity Put Options			19/12/2025 At any time	64,900	0.06%	cash	-
Morgan Stanley & Co. International plc Equity Put Options			19/06/2026 At any time	633,400	0.60%	cash	-
Morgan Stanley & Co. International plc Equity Put Options			18/12/2026 At any time	676,800	0.64%	cash	+
	TOTAL			4,196,421	3.96%

Chain of controlled undertakings for Morgan Stanley & Co. International plc • Morgan Stanley & Co. International plc, Legal & Compliance Department, 25 Cabot Square, Canary Wharf, London, E14 4QA, UNITED KINGDOM. is a direct holder and is a subsidiary of Morgan Stanley Investments (UK) • Morgan Stanley Investments (UK), 20 Bank Street, Canary Wharf, London, E14 4AD, UNITED KINGDOM. is an indirect holder and is a subsidiary of Morgan Stanley International Limited • Morgan Stanley International Limited, 25 Cabot Square, Canary Wharf, London, E14 4QA, UNITED KINGDOM. is an indirect holder and is a subsidiary of Morgan Stanley International Holdings Inc. • Morgan Stanley International Holdings Inc., c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware, 19801, USA. is an indirect holder and is a subsidiary of the beneficial owner, Morgan Stanley Chain of Controlled undertakings continued in section 13) Additional Information

13) Additional information

Chain of controlled undertakings for Morgan Stanley & Co. LLC

• Morgan Stanley & Co. LLC, c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware, 19801, USA. is a direct holder and is a subsidiary of Morgan Stanley Domestic Holdings, Inc.

• Morgan Stanley Capital Management, LLC, c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware, 19801, USA. is an indirect holder and is a subsidiary of the beneficial owner, Morgan Stanley

Chain of controlled undertakings for Prime Dealer Services Corp.

• Prime Dealer Services Corp., c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware, 19801, USA is a direct holder and is a subsidiary of Morgan Stanley & Co. LLC

• Morgan Stanley & Co. LLC, c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware, 19801, USA. is a direct holder and is a subsidiary of Morgan Stanley Domestic Holdings, Inc.

• Morgan Stanley Capital Management, LLC, c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware, 19801, USA. is an indirect holder and is a subsidiary of the beneficial owner, Morgan Stanley

12) In case of proxy voting for only one GM

The totals will be updated once you have clicked on

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