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EQS-PVR: AIXTRON SE: Release according to Article 40, Section 1 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution


EQS-PVR: AIXTRON SE: Release according to Article 40, Section 1 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution

EQS Voting Rights Announcement: AIXTRON SE

AIXTRON SE: Release according to Article 40, Section 1 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution

20.10.2025 / 10:00 CET/CEST

Dissemination of a Voting Rights Announcement transmitted by EQS News - a service of EQS Group.

The issuer is solely responsible for the content of this announcement.

Notification of Major Holdings

1. Details of issuerName:AIXTRON SEStreet:Dornkaulstraße 2Postal code:52134City:Herzogenrath

GermanyLegal Entity Identifier (LEI):5299004UJ4D51M25LD67

2. Reason for notification Acquisition/disposal of shares with voting rightsXAcquisition/disposal of instruments Change of breakdown of voting rights Other reason:

3. Details of person subject to the notification obligationLegal entity: The Goldman Sachs Group, Inc.

City of registered office, country: Wilmington, DE, United States of America (USA)

4. Names of shareholder(s)

holding directly 3% or more voting rights, if different from 3.

5. Date on which threshold was crossed or reached:15 Oct 2025

6. Total positions % of voting rights attached to shares

(total of 7.a.)% of voting rights through instruments

(total of 7.b.1 + 7.b.2)Total of both in %

(7.a. + 7.b.)Total number of voting rights pursuant to Sec. 41 WpHGNew0.94 %3.96 %4.90 %113456120Previous notification0.96 %4.06 %5.03 %/

7. Details on total positions

a. Voting rights attached to shares (Sec. 33, 34 WpHG)ISINAbsoluteIn % Direct

(Sec. 33 WpHG)Indirect

(Sec. 34 WpHG)Direct

(Sec. 33 WpHG)Indirect

(Sec. 34 WpHG)DE000A0WMPJ6010689200 %0.94 %US009606203102780 %0.0002 %Total10691980.94 %

b.1. Instruments according to Sec. 38 (1) no. 1 WpHGType of instrumentExpiration or maturity dateExercise or conversion periodVoting rights absoluteVoting rights in %Right To RecallOpen2056980.18 %Right Of UseOpen18169061.60 % Total20226041.78 %

b.2. Instruments according to Sec. 38 (1) no. 2 WpHGType of instrumentExpiration or maturity dateExercise or conversion periodCash or physical settlementVoting rights absoluteVoting rights in %Swap15.10.2035Cash17857431.57 %Call Warrant31.12.2030Cash6804980.60 % Total24662422.17 %

8. Information in relation to the person subject to the notification obligation

Person subject to the notification obligation is not controlled nor does it control any other undertaking(s) that directly or indirectly hold(s) an interest in the (underlying) issuer (1.).XFull chain of controlled undertakings starting with the ultimate controlling natural person or legal entity:

Name% of voting rights (if at least 3% or more)% of voting rights through instruments (if at least 5% or more)Total of both (if at least 5% or more)The Goldman Sachs Group, Inc. % % %GSAM Holdings LLC % % %Goldman Sachs Asset Management, L.P. % % %- % % %The Goldman Sachs Group, Inc. % % %GSAM Holdings LLC % % %Goldman Sachs Asset Management Holdings LLC % % %Goldman Sachs Asset Management UK Holdings I Ltd % % %Goldman Sachs Asset Management UK Holdings II Ltd % % %Goldman Sachs Asset Management Holdings I B.V. / Goldman Sachs Asset Management Holdings II B.V. % % %Goldman Sachs Asset Management Holdings B.V. % % %Goldman Sachs Asset Management International Holdings B.V. % % %Goldman Sachs Asset Management B.V. % % %- % % %The Goldman Sachs Group, Inc. % % %Goldman Sachs Bank USA % % %Goldman Sachs Bank Europe SE % % %- % % %The Goldman Sachs Group, Inc. % % %Goldman Sachs & Co. LLC % % %- % % %The Goldman Sachs Group, Inc. % % %Goldman Sachs (UK) L.L.C. % % %Goldman Sachs Group UK Limited % % %Goldman Sachs International % % %

9. In case of proxy voting according to Sec. 34 para. 3 WpHG

(only in case of attribution of voting rights in accordance with Sec. 34 para. 1 sent. 1 No. 6 WpHG)

Date of general meeting:

Holding total positions after general meeting (6.) after annual general meeting:

Proportion of voting rightsProportion of instrumentsTotal of both % % %

10. Other explanatory remarks:

Date

17 Oct 2025

20.10.2025 CET/CEST The EQS Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases.

View original content: EQS News

Language:EnglishCompany:AIXTRON SEDornkaulstraße 252134 HerzogenrathGermanyInternet:www.aixtron.com

End of NewsEQS News Service

2214976 20.10.2025 CET/CEST

© 2025 EQS Group

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