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Solvay SA

Major Shareholding Notification Dec 4, 2025

4005_mrq_2025-12-04_330fad0f-59a9-4340-910f-0f30b6dfdc66.pdf

Major Shareholding Notification

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Press release Regulated information

Participation notification by UBS Group AG

Brussels, December 4, 2025, 17:45 CET

In line with Belgian transparency legislation (Law of May 2, 2007), UBS Group AG 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
November 27, 2025 0.17% 2.88% 3.05%

The notification, dated December 2, 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: November 27, 2025
  • Threshold of direct voting rights crossed: 3% upwards
  • Denominator: 105,876,416
  • Additional information: The disclosure obligation arose due to the total indirect holdings of UBS Group AG in voting rights of Solvay SA, held directly by controlled undertakings, going above 3% on 27th November 2025.
  • Persons subject to the notification requirement: UBS Group AG, Bahnhofstrasse 45, 8001 Zürich

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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
UBS Group AG 0 0.00%
UBS AG 61,558 0.06%
UBS Europe SE 2,352 0.00%
UBS Asset Management (Singapore)
Ltd
732 0.00%
UBS Asset Management (Europe)
S.A.
34,968 0.03%
UBS Fund Management (Switzerland)
AG
80,334 0.08%
Subtotal 179,944 0.17%
TOTAL 179,944 0 0.17% 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
UBS AG Long Call Option 19.06.2026 135,000 0.13% physical
UBS AG Short Put Option 19.06.2026 395,000 0.37% physical
UBS AG Equity Swaps 28.03.2028 900 0.00% cash
UBS AG Right to Recall of Lent shares At any time 431,774 0.41% physical
UBS AG Right to Substitute shares delivered as collaterals At any time 7,680 0.01% physical
UBS Switzerland AG Right to Recall of Lent shares At any time 21,113 0.02% physical
UBS Switzerland AG Right to Substitute shares delivered as collaterals At any time 14,779 0.01% physical
UBS Switzerland AG Right of use over shares At any time 3,334 0.00% physical
UBS AG Right of use over shares At any time 17,934 0.02% physical
UBS AG Short Put Option 18.12.2026 285,000 0.27% physical
UBS Switzerland AG Right of use over Reverse Convertible At any time 9,195 0.01% cash
UBS AG Swaps on Baskets 30.06.2026 80 0.00% cash
UBS AG Swaps on Baskets 01.06.2027 1,730,950 1.63% cash
TOTAL 3,052,739 2.88%
TOTAL (A & B) # of voting rights % of voting rights
CALCULATE 3,232,683 3.05%

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

Investor relations

Geoffroy d'Oultremont: +32 478 88 32 96 Vincent Toussaint: +33 6 74 87 85 65 Charlotte Vandevenne: +32 471 68 01 66

[email protected]

Media relations

Peter Boelaert: +32 479 30 91 59

Laetitia Van Minnenbruggen: +32 484 65 30 47

[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 has harnessed 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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