14. April 2026 | Stimmrechtsmitteilungen

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 14.04.2026 /

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

14.04.2026 / 16:45 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 issuer

Name:	AIXTRON SE
Street:	Dornkaulstraße 2
Postal code:	52134
City:	Herzogenrath Germany
Legal Entity Identifier (LEI):	5299004UJ4D51M25LD67

2. Reason for notification

X	Acquisition/disposal of shares with voting rights
	Acquisition/disposal of instruments
	Change of breakdown of voting rights
X	Other reason: non-applying of trading book exemption according to sec. 36 para. 1 WpHG. Delta adjusted on Warrant Cash Settlement

3. Details of person subject to the notification obligation

Legal entity: SOCIETE GENERALE SA
City of registered office, country: PARIS, France

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:

25 March 2026

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 WpHG
New	0.02 %	5.05 %	5.07 %	113456120
Previous notification	0 %	0 %	0 %	/

7. Details on total positions
a. Voting rights attached to shares (Sec. 33, 34 WpHG)

ISIN	Absolute	In %
	Direct (Sec. 33 WpHG)	Indirect (Sec. 34 WpHG)	Direct (Sec. 33 WpHG)	Indirect (Sec. 34 WpHG)
DE000A0WMPJ6	17264	0	0.02 %	0.00 %
Total	17264	0.02 %

b.1. Instruments according to Sec. 38 (1) no. 1 WpHG

Type of instrument	Expiration or maturity date	Exercise or conversion period	Voting rights absolute	Voting rights in %
Right to recall lent securities	N/A	N/A	210756	0.19 %
European Call Warrant	2027-06-25	2026-06-26 to 2027-06-25	100587	0.09 %
Forward on basket	2026-04-13		71709	0.06 %
		Total	383052	0.34 %

b.2. Instruments according to Sec. 38 (1) no. 2 WpHG

Type of instrument	Expiration or maturity date	Exercise or conversion period	Cash or physical settlement	Voting rights absolute	Voting rights in %
Contracts For Difference	N/A	N/A	Cash	118203	0.10 %
American Call Warrant	2049-12-31	2026-06-19 to 2049-12-31	Cash	1191501	1.05 %
European Call Warrant	2026-09-18	2026-06-19 to 2026-09-18	Cash	6923	0.01 %
European Put Warrant	2027-03-26	2026-06-26 to 2027-03-26	Physical	39214	0.03 %
American Put Warrant	2033-01-03	2026-06-19 to 2033-01-03	Cash	30103	0.03 %
American Call Warrant on basket	2033-01-03	Until 2033-01-03	Cash	1313439	1.16 %
American Call Option	2033-01-03	2026-06-19 to 2033-01-03	Cash	1264226	1.11 %
European Call Option	2026-06-19	2026-06-19	Cash	74	0 %
American Put Option	2033-01-03	2026-06-19 to 2033-01-03	Cash	49173	0.04 %
American Call Option on basket	2033-01-03	Until 2033-01-03	Cash	1334653	1.18 %
			Total	5347509	4.71 %

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.).
X	Full 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)
SOCIETE GENERALE SA	%	%	%
SOCIETE GENERALE EFFEKTEN Gmbh	%	%	%

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 rights	Proportion of instruments	Total of both
%	%	%

10. Other explanatory remarks:

Date

31 March 2026

14.04.2026 CET/CEST The EQS Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases.

Language:	English
Company:	AIXTRON SE
	Dornkaulstraße 2
	52134 Herzogenrath
	Germany
Internet:	www.aixtron.com


End of News	EQS News Service

2308284 14.04.2026 CET/CEST

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