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Solvay SA

Major Shareholding Notification Oct 21, 2025

4005_mrq_2025-10-21_90af1a66-890a-4256-a753-c03d00b650d0.pdf

Major Shareholding Notification

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Press release Regulated information

Participation notification by Morgan Stanley

Brussels, October 21, 2025, 17:45 CEST

In line with Belgian transparency legislation (Law of May 2, 2007), Morgan Stanley recently sent to Solvay the following transparency notification indicating that they crossed the threshold of 3%.

Here is a summary of the notification:

Date on which the threshold
was crossed
Voting rights after the
transaction
Equivalent financial
instruments after the
transaction
Total
October 14, 2025 0.03% 3.06% 3.09%

The notification, dated October 17, 2025, contains the following information:

  • Reason for the notification:
  • Acquisition or disposal of financial instruments that are treated as voting securities
  • Notified by: A parent undertaking or a controlling person
  • Date on which the threshold is crossed: October 14, 2025
  • Threshold of direct voting rights crossed: 3% upwards
  • Denominator: 105,876,416
  • Persons subject to the notification requirement: Morgan Stanley c/o The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801, USA

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● Notified details:

A) Voting rights Previous notification After the transaction
# of voting rights # of voti ng rights % of voting rights
Holders of voting rights Linked to securities Not linked to the
securities
Linked to securities Not linked to the
securities
Morgan Stanley 0 0 0 0.00% 0.00%
Morgan Stanley & Co. International plc 0 34,972 0 0.03% 0.00%
Subtotal 34,972 0.03%
TOTAL 34,972 0 0.03% 0.00%
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 Retail Structured Product - Note 27/02/2026 At any time 3,752 0.00% cash
Morgan Stanley & Co. International plc Retail Structured Product - Note 02/07/2035 At any time 5,010 0.00% cash
Morgan Stanley & Co. International plc Retail Structured Product - Note 01/10/2035 At any time 5,268 0.00% cash
Morgan Stanley & Co. International plc Retail Structured Product - Note 17/08/2037 At any time 3,676 0.00% cash
Morgan Stanley & Co. International plc Retail Structured Product - Note 02/11/2037 At any time 3,548 0.00% cash
Morgan Stanley & Co. International plc Equity Call Options 19/12/2025 At any time 800 0.00% physical
Morgan Stanley & Co. International plc Equity Call Options 19/06/2026 At any time 316,100 0.30% physical
Morgan Stanley & Co. International plc Equity Put Options 17/10/2025 At any time 134,800 0.13% physical
Morgan Stanley & Co. International plc Equity Put Options 21/11/2025 At any time 133,400 0.13% physical
Morgan Stanley & Co. International plc Equity Put Options 19/12/2025 At any time 127,900 0.12% physical
Morgan Stanley & Co. International plc Equity Put Options 19/06/2026 At any time 756,300 0.71% physical
Morgan Stanley & Co. International plc Equity Put Options 18/12/2026 At any time 425,100 0.40% physical
Morgan Stanley & Co. International plc Equity Swap 27/11/2025 At any time 44,590 0.04% cash
Morgan Stanley & Co. LLC Right of recall over securities lending agreements At any time At any time 605,996 0.57% physical
Morgan Stanley & Co. International plc Right of recall over securities lending agreements At any time At any time 210,738 0.20% physical
Prime Dealer Services Corp. Right of recall over securities lending agreements At any time At any time 460,645 0.44% physical
TOTAL 3,237,623 3.06%
The totals will be updated once you have clicked on
TOTAL (4.9.D)

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

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Contacts

Peter Boelaert +32 479 30 91 59

Laetitia Van Minnenbruggen +32 484 65 30 47

[email protected]

Media relations Investor relations

Boris Cambon-Lalanne +32 471 55 37 49

Geoffroy d'Oultremont +32 478 88 32 96

Vincent Toussaint +33 6 74 87 85 65

[email protected]

About Solvay

Solvay, a pioneering chemical company with a legacy rooted in founder Ernest Solvay's pivotal innovations in the soda ash process, is dedicated to delivering essential solutions globally through its workforce of circa 9,000 employees. Since 1863, Solvay harnesses the power of chemistry to create innovative, sustainable solutions that answer the world's most essential needs such as purifying the air we breathe and the water we drink, preserving our food supplies, protecting our health and well-being, creating eco-friendly clothing, making the tires of our cars more sustainable and cleaning and protecting our homes. Solvay's unwavering commitment drives the transition to a carbon-neutral future by 2050, underscoring its dedication to sustainability and a fair and just transition. As a world-leading company with €4.7 billion in net sales in 2024, Solvay is listed on Euronext Brussels and Paris (SOLB). For more information about Solvay, please visit solvay.com or follow Solvay on Linkedin.

Ce communiqué de presse est également disponible en français. Dit persbericht is ook in het Nederlands beschikbaar.

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