Siltronic AG

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

03.07.2026 / 12:05 CET/CEST

Dissemination of a Voting Rights Announcement transmitted by - a service of .

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

Notification of Major Holdings1. Details of issuer
Name:Siltronic AGStreet:Einsteinstr. 172Postal code:81677City:MunichGermanyLegal Entity Identifier (LEI):5299003NKV26NNGHHR90
2. Reason for notification
XAcquisition/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: JPMorgan 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.

J.P. Morgan Securities plc

5. Date on which threshold was crossed or reached:

29 Jun 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 WpHGNew4.14 %1.08 %5.21 %33000000Previous notification3.68 %1.03 %4.72 %/
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)DE000WAF3001013651590.00 %4.14 %Total13651594.14 %
b.1. Instruments according to Sec. 38 (1) no. 1 WpHG
Type of instrumentExpiration or maturity dateExercise or conversion periodVoting rights absoluteVoting rights in %Exchangeable Bond23/01/202923/01/20292748340.83 %Third parties Exchangeable Bond where right of use23/01/202923/01/2029359260.11 %  Total3107600.94 %
b.2. Instruments according to Sec. 38 (1) no. 2 WpHG
Type of instrumentExpiration or maturity dateExercise or conversion periodCash or physical settlementVoting rights absoluteVoting rights in %Cash-settled Call Option02/01/209902/01/2099Cash7550 %Equity Swap11/11/2026 – 13/06/203111/11/2026 – 13/06/2031Cash435130.13 %   Total442680.13 %
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)JPMorgan Chase & Co. % % %JPMorgan Chase Bank, National Association % % %J.P. Morgan International Finance Limited % % %J.P. Morgan Capital Holdings Limited % % %J.P. Morgan Securities plc 4.14 % %5.11 %- % % %JPMorgan Chase & Co. % % %JPMorgan Chase Holdings LLC % % %J.P. Morgan Broker-Dealer Holdings Inc. % % %J.P. Morgan Securities LLC % % %- % % %JPMorgan Chase & Co. % % %JPMorgan 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 positions after general meeting (6.) after annual general meeting:
Proportion of voting rights %Proportion of instruments %Total of both %
10. Other explanatory remarks: Date

02 Jul 2026

03.07.2026 CET/CEST The EQS Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases.

Language:EnglishCompany:Siltronic AGEinsteinstr. 17281677 MunichGermanyInternet:www.siltronic.com
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2359202 03.07.2026 CET/CEST Saving the news in databases or any forwarding of the news to third parties in a commercial context or for commercial purposes is only permitted with the prior written consent of EQS Group AG.