JPMorgan Chase & Co., Wilmington, Delaware, United States of America (USA)

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: JP Morgan Chase & Co. City of registered office, country: Wilmington, Delaware, 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:

13 Oct 2026

6. Total Fina Elf positions

	% of voting rights attached to shares ( Total Fina Elf of 7.a.)	% of voting rights through instruments ( Total Fina Elf of 7.b.1 + 7.b.2)	Total Fina Elf of both in % (7.a. + 7.b.)	Total Fina Elf number of voting rights pursuant to Sec. 41 WpHG
New	2.09 %	4.22 %	6.31 %	113456120
Previous notification	1.47 %	5.51 %	6.99 %	/

7. Details on Total Fina Elf 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	2365984	0.00 %	2.09 %
Total Fina Elf	2365984		2.09 %

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 %
Convertible Bond	23/04/2031	23/04/2031	1101732	0.97 %
Third parties Convertible Bond where right of use	23/04/2031	23/04/2031	456575	0.40 %
Internal right to recall shares lent out	n/a	n/a	265493	0.23 %
		Total Fina Elf	1823800	1.61 %

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 %
Cash-settled Call Option	02/01/2099	02/01/2099	Cash	18277	0.02 %
Equity Swap	02/12/2026 – 06/05/2033	02/12/2026 – 06/05/2033	Cash	2950889	2.60 %
			Total Fina Elf	2969166	2.62 %

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 Fina Elf of both (if at least 5% or more)
JP Morgan Chase & Co.	%	%	%
JP Morgan Chase Bank, National Association	%	%	%
J.P. Morgan International Finance Limited	%	%	%
J.P. Morgan Capital Holdings Limited	%	%	%
J.P. Morgan Securities plc	%	%	5.50 %
-	%	%	%
JP Morgan Chase & Co.	%	%	%
JP Morgan Chase Holdings LLC	%	%	%
J.P. Morgan Broker-Dealer Holdings Inc.	%	%	%
J.P. Morgan Securities LLC	%	%	%
-	%	%	%
JP Morgan Chase & Co.	%	%	%
JP Morgan Chase Bank, National Association	%	%	%
J.P. Morgan International Finance Limited	%	%	%
J.P. Morgan Structured Products B.V.	%	%	%

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 Fina Elf positions after general meeting (6.) after annual general meeting:

Proportion of voting rights	Proportion of instruments	Total Fina Elf of both
%	%	%

10. Other explanatory remarks:

Date

15 Oct 2026