AIXTRON SE UBS Group AG, Zurich, Switzerland

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
03.08.2026 / 15:00 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 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
	Other reason:

3. Details of person subject to the notification obligation

Legal entity: UBS Group AG
City of registered office, country: Zurich, Switzerland

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:

29 Jul 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	2.98 %	0.63 %	3.61 %	113456120
Previous notification	3.03 %	0.97 %	4 %	/

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	0	3383129	0 %	2.98 %
Total	3383129		2.98 %

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 of Use over Shares		At any time	70536	0.06 %
Right to Recall of Lent Shares		At any time	28458	0.03 %
		Total	98994	0.09 %

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 %
Right of Use over Reverse Convertibles		At any time	Cash	29218	0.03 %
Convertible Bond (DE000A460HP9)	23/04/2031	03/06/2026- 31/03/2031	Physical	506204	0.45 %
Swaps On Baskets	30/12/2026 – 01/01/2031		Cash	47304	0.04 %
Warrant	No Expiry Date		Cash	10000	0.01 %
Right of Use over Convertible Bond		At any time	Physical	19851	0.02 %
			Total	612577	0.54 %

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)
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Americas Holding LLC	%	%	%
UBS Americas Inc.	%	%	%
UBS Asset Management (Americas) LLC	%	%	%
–	%	%	%
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Asset Management AG	%	%	%
UBS Asset Management (Europe) S.A.	%	%	%
–	%	%	%
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Asset Management AG	%	%	%
UBS Asset Management Holding (No. 2) Ltd	%	%	%
UBS Asset Management Holding Ltd	%	%	%
UBS Asset Management (UK) Ltd	%	%	%
–	%	%	%
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Europe SE	%	%	%
–	%	%	%
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Asset Management AG	%	%	%
UBS Asset Management Switzerland AG	%	%	%
UBS Fund Management (Switzerland) AG	%	%	%
–	%	%	%
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Americas Holding LLC	%	%	%
UBS Americas Inc.	%	%	%
UBS Securities LLC	%	%	%
–	%	%	%
UBS Group AG	%	%	%
UBS AG	%	%	%
UBS Switzerland AG	%	%	%

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 Jul 2026

03.08.2026 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
LEI Code:	5299004UJ4D51M25LD67


End of News	EQS News Service

2375430 03.08.2026 CET/CEST