Syensqo SA/NV

Major Shareholding Notification • Aug 1, 2025

Participatiemelding van BlackRock Inc.

Brussel, België - 28 juli 2025 – 8u30 CEST

In overeenstemming met de Belgische wetgeving op de openbaring van belangrijke deelnemingen (wet van 2 mei 2007), heeft BlackRock Inc. (12 Throgmorton Avenue, London EC2N 2DL, UK) een transparantiemelding naar Syensqo gestuurd om aan te geven dat de drempel van 3% is overschreden. Hier vindt u de samenvatting van de bewegingen:

Datum van	Stemrechten na de	Aan stemrechten gelijkgestelde financiële	Totaal
drempeloverschrijding	transactie	instrumenten na de transactie
22 juli 2025	3.02%	0.66%	3.68%

De laatste notificatie van 23 juli 2025 en ontvangen op 23 juli 2025, bevat de volgende informatie:

• Reden van de notificatie:
  • Verwerving of overdracht van stemgerechtigde effecten of stemrechten
• Notificatie door: BlackRock Inc.: Een moederonderneming of een controlerende persoon
• Datum van drempeloverschrijding: 22 juli 2025
• Overschreden drempel van directe stemrechten: 3% opwaarts
• Noemer: 103 921 273
• Toegevoegde informatie: de informatieverplichting ontstond doordat stemrechten verbonden aan aandelen voor BlackRock, Inc. boven de 3% daalden.
• Kennisgeving Plichtige personen:

Name	Address (for legal entities)
BlackRock, Inc.	50 Hudson Yards, New York, NY, 10001, U.S.A.
BlackRock (Singapore) Limited	20 Anson Road #18-01, Singapore, 79912, Singapore
BlackRock Advisors (UK) Limited	12 Throgmorton Avenue, London, EC2N 2DL, U.K.
BlackRock Advisors, LLC	50 Hudson Yards, New York, NY, 10001, U.S.A.
BlackRock Asset Management Canada Limited	161 Bay Street, Suite 2500, Toronto, Ontario, M5J 2S1, Canada
BlackRock Asset Management Deutschland AG	Lenbachplatz 1 1st Floor, Munich, 80333-MN3, Germany
BlackRock Asset Management North Asia Limited	15/F, 16/F, 17/F Citibank Tower & 17/F ICBC Tower, 3 Garden Road, Central, Hong Kong
BlackRock Financial Management, Inc.	50 Hudson Yards, New York, NY, 10001, U.S.A.
BlackRock Fund Advisors	400 Howard Street, San Francisco, CA, 94105, U.S.A.
BlackRock Institutional Trust Company, National Association	400 Howard Street, San Francisco, CA, 94105, U.S.A.
BlackRock Investment Management (Australia) Limited	Level 37 Chifley Tower, 2 Chifley Square, Sydney NSW 2000, Australia
BlackRock Investment Management (UK) Limited	12 Throgmorton Avenue, London, EC2N 2DL, U.K.
BlackRock Investment Management, LLC	1 University Square Drive, Princeton, NJ, 8540, U.S.A.
BlackRock Japan Co., Ltd.	1-8-3 Marunouchi Chiyoda-ku, Trust Tower Main, Tokyo, 100-8217, Japan
Aperio Group, LLC	3 Harbor Dr Suite 204, Sausalito, CA 94965, U.S.A.

Details van de kennisgeving

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
BlackRock, Inc.	0	0		0.00%
BlackRock (Singapore) Limited	4,355	4,355		0.00%
BlackRock Advisors (UK) Limited	240,378	238,795		0.23%
BlackRock Advisors, LLC	47,772	47,772
BlackRock Asset Management Canada Limited	58,007	57,993		0.06%
BlackRock Asset Management Deutschland AG	188,291	188,291		0.18%
BlackRock Asset Management North Asia Limited	2,356	2,356		0.00%
BlackRock Financial Management, Inc.	7,871	7,871		0.01%
BlackRock Fund Advisors	1,340,254	1,344,917		1.29%
BlackRock Institutional Trust Company, National Association	884,391	883,884		0.85%
BlackRock Investment Management (Australia) Limited	17,082	17,082		0.02%
BlackRock Investment Management (UK) Limited	111,867	133,582		0.13%
BlackRock Investment Management, LLC	99,100	95,005		0.09%
BlackRock Japan Co., Ltd.	82,764	82,764		0.08%
Aperio Group, LLC	29,718	29,718		0.03%
Subtotal	3,114,207	3,134,384		3.02%
	TOTAL	3,134,384	0	3.02%	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
BlackRock Advisors (UK) Limited	Securities Lent			541,880	0.52%	physical
BlackRock Investment Management (UK) Limited	Securities Lent			145,564	0.14%	physical
BlackRock Investment Management, LLC	Securities Lent			3,424	0.00%	physical
	TOTAL			690,868	0.66%

TOTAL (A & B)			# of voting rights % of voting rights
	CALCULATE	3,825,253	3.68%

De verklaringen en de volledige keten van gecontroleerde ondernemingen waardoor het bedrijf feitelijk wordt aangehouden, is beschikbaar in de Investor Relations-rubriek op de website van Syensqo.

Contacts

Investors & Analysts Media investor.relations@syensqo.com media.relations@syensqo.com Sherief Bakr +44 7920 575 989 Perrine Marchal +32 478 32 62 72 Bisser Alexandrov +33 607 635 280 Laetitia Schreiber +32 487 74 38 07 Loïc Flament +32 478 69 74 20 Robbin Moore-Randolph +1 470 493 2433

About Syensqo

Syensqo is a science company developing groundbreaking solutions that enhance the way we live, work, travel and play. Inspired by the scientific councils which Ernest Solvay initiated in 1911, we bring great minds together to push the limits of science and innovation for the benefit of our customers, with a diverse, global team of more than 13,000 associates.

Our solutions contribute to safer, cleaner, and more sustainable products found in homes, food and consumer goods, planes, cars, batteries, smart devices and health care applications. Our innovation power enables us to deliver on the ambition of a circular economy and explore breakthrough technologies that advance humanity.

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