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

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

	Acquisition/disposal of shares with voting rights
X	Acquisition/disposal of instruments
	Change of breakdown of voting rights
	Other reason:

3. Details of person subject to the notification obligation

Legal 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.

Goldman Sachs Asset Management, L.P.

5. Date on which threshold was crossed or reached:

23 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	3.37 %	4.96 %	8.33 %	113456120
Previous notification	3.10 %	5.02 %	8.12 %	/

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	3822642	0 %	3.37 %
Total	3822642		3.37 %

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	Open		2709277	2.39 %
Right Of Use	Open		1923199	1.70 %
Convertible Bond	25.04.2031		49628	0.04 %
Call Option	18.09.2026		60000	0.05 %
		Total	4742105	4.18 %

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 %
Put Warrant	18.06.2027		Cash	40	0.00004 %
Swap	21.07.2036		Cash	224880	0.20 %
Call Option	25.08.2026		Cash	2790	0.002 %
Call Warrant	31.12.2030		Cash	654710	0.58 %
			Total	882419	0.78 %

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)
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.	%	%	%
GSAM Holdings LLC	%	%	%
Goldman Sachs Asset Management, L.P.	3.09 %	%	%
Goldman Sachs Asset Management International Holdings L.L.C.	%	%	%
Goldman Sachs Asset Management Co., Ltd.	%	%	%
-	%	%	%
The Goldman Sachs Group, Inc.	%	%	%
Goldman Sachs (UK) L.L.C.	%	%	%
Goldman Sachs Group UK Limited	%	%	%
Goldman Sachs International Bank	%	%	%
-	%	%	%
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.	%	%	%
The Goldman Sachs Trust Company, National Association	%	%	%
The Goldman Sachs Trust Company of Delaware	%	%	%
-	%	%	%
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 rights	Proportion of instruments	Total of both
%	%	%

10. Other explanatory remarks:

Date

29 Jul 2026