WACKER intends to reduce its stake in Siltronic

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES, CANADA, AUSTRALIA, JAPAN, SOUTH AFRICA OR ANY OTHER JURISDICTION IN WHICH OFFERS OR SALES WOULD BE PROHIBITED BY APPLICABLE LAW.

THIS ANNOUNCEMENT IS NOT AN OFFER OF SECURITIES FOR SALE IN ANY JURISDICTION, INCLUDING THE UNITED STATES, CANADA, SOUTH AFRICA, AUSTRALIA OR JAPAN. NEITHER THIS ANNOUNCEMENT NOR ANYTHING CONTAINED HEREIN SHALL FORM THE BASIS OF, OR BE RELIED UPON IN CONNECTION WITH, ANY OFFER OR COMMITMENT WHATSOEVER IN ANY JURISDICTION.

- Accelerated bookbuild launched for the sale of approximately 1.8 million shares in Siltronic

- Transaction strengthens WACKER’s financial position and creates additional scope to invest in future growth

- Following this transaction, WACKER will remain the largest shareholder

Munich, May 26, 2026 - Wacker Chemie AG (“WACKER”) intends, through an accelerated bookbuild process, to dispose of approximately 1.8 million shares of Siltronic AG (“Siltronic”) representing approximately 6 percent of Siltronic’s capital stock. The offering is addressed to qualified investors and to international institutional investors only.

The placement will be launched immediately following this announcement. Pricing and allocation are expected to follow shortly after the completion of the bookbuild. A further announcement will be made once the transaction has been priced.

"With proceeds from this transaction, we are strengthening our financial position and creating additional scope to invest in future growth of WACKER," says WACKER CEO Christian Hartel.

WACKER currently holds 30.83 percent of Siltronic's issued capital stock and will remain the largest shareholder of Siltronic after completion of the transaction. The shares of Siltronic are listed on the regulated market of the Frankfurt Stock Exchange (ISIN code: DE000WAF3001).

WACKER has undertaken vis-à-vis the bank acting for it on the transaction (BofA Securities as Sole Global Coordinator and Sole Bookrunner) not to dispose of any further Siltronic shares in the next 90 days, subject to certain exemptions or waiver by BofA Securities.

Important regulatory notice

This announcement is not for publication, distribution or release, directly or indirectly, in or into the United States of America (including its territories and possessions, any state of the United States of America and the District of Columbia), Canada, South Africa, Australia or Japan or any other jurisdiction where such an announcement would be unlawful. The distribution of this announcement and the offer and sale of the Shares may be subject to legal restrictions in certain jurisdictions and persons into whose possession this document or other information referred to herein comes should inform themselves about and observe any such restriction. Any failure to comply with these restrictions may constitute a violation of the securities laws of the respective jurisdiction. The Shares are not being offered to the public in any jurisdiction and may not be offered to the public in any jurisdiction in circumstances which would require the preparation or registration of any prospectus or offering document relating to the shares in such jurisdiction. No action has been taken by the WACKER, BofA Securities Europe SA (the “Sole Bookrunners”) or any of their affiliates to permit a public offering of the shares or possession or distribution of this announcement in any jurisdiction where action for that purpose is required. The Shares have not been and will not be registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States without registration thereunder or pursuant to an available exemption therefrom. Neither this document nor the information contained herein constitutes or forms part of an offer to sell, or the solicitation of an offer to buy, securities in the United States. There will be no public offer of any securities in the United States or in any other jurisdiction.

In member states of the European Economic Area, this announcement and any offer if made subsequently is directed exclusively at persons who are “qualified investors” within the meaning of the Prospectus Regulation (“Qualified Investors”). For these purposes, the expression “Prospectus Regulation” means Regulation (EU) 2017/1129. In the United Kingdom, this announcement is directed exclusively at persons who are “qualified investors” within the meaning of paragraph 15 of Schedule 1 of the Public Offers and Admissions to Trading Regulations 2024 (i) who have professional experience in matters relating to investments falling within the meaning of Article 19 of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended from time to time (the “Order”) or (ii) who fall within Article 49(2)(a) to (d) of the Order, or (iii) to whom this announcement may otherwise lawfully be communicated (all such persons, “Relevant Persons”); any persons in the United Kingdom who are not Relevant Persons should not take any action on the basis of this announcement and should not act on or rely on it. Any investment or investment activity to which this announcement relates is available to, and will be engaged in with, only (i) Qualified Investors in member states of the EEA and (ii) Relevant Persons in the UK.

No representation or warranty, express or implied, is or will be made as to, or in relation to, and no responsibility or liability is or will be accepted by the Sole Bookrunner or by any of its affiliates, or its or its affiliates’ directors, officers, employees advisers or agents as to, or in relation to, the truth, accuracy or completeness of this announcement or any other written or oral information made available to or publicly available to any interested party or its advisers, and any liability for any loss howsoever arising from any use of this announcement or its contents or otherwise arising in connection therewith therefore is expressly disclaimed.

In connection with the offering of the shares of Siltronic (the “Shares”), the Sole Bookrunner and any of its respective affiliates may take up as a principal position a portion of the Shares and in that capacity may retain, purchase, sell or offer to sell for their own accounts such Shares and other securities of Siltronic or relative investments. Accordingly, references in this announcement to the Shares being sold, offered, acquired, placed or otherwise dealt in should be read as including any sale or offer to, or acquisition, placing or dealing by, the Sole Bookrunner and any of its affiliates acting in such capacity. In addition, the Sole Bookrunner or its respective affiliates may enter into financing arrangements (including swaps or contracts for differences) with investors in connection with which the Sole Bookrunner (or its affiliates) may from time to time acquire, hold or dispose of Shares. The Sole Bookrunner does not intend to disclose the extent of any such investment or transactions otherwise than in accordance with any legal or regulatory obligation to do so.

The information contained in this announcement is for background purposes only and does not purport to be full or complete. No reliance may be placed for any purpose on the information contained in this announcement or its accuracy or completeness. This announcement does not purport to identify or suggest the risks (direct or indirect) which may be associated with an investment in the Shares. Any investment decision in connection with the Shares may be made solely on the basis of all publicly available information relating to the Shares (which has not been independently verified by the Sole Bookrunner).

Any communications that a transaction is or that the book is “covered” (i.e. indicated demand from investors in the book equals or exceeds the amount of the securities being offered) is not any indication or assurance that the book will remain covered or that the transaction and Shares will be fully distributed by the Sole Bookrunner. The Sole Bookrunner reserves the right to take up a portion of the Shares as a principal position at any stage at its sole discretion, inter alia, to take account of the objectives of WACKER, MiFID II requirements and in accordance with allocation policies.

The Sole Bookrunner is acting on behalf of WACKER and no one else in connection with any offering of the Shares and will not be responsible to any other person for providing the protections afforded to clients of the Sole Bookrunner nor for providing advice in relation to any offering of the Shares.

This press release contains forward-looking statements based on assumptions and estimates of WACKER’s Executive Board. Although we assume the expectations in these forward-looking statements are realistic, we cannot guarantee they will prove to be correct. The assumptions may harbor risks and uncertainties that may cause the actual figures to differ considerably from the forward-looking statements. Factors that may cause such discrepancies include changes in the economic and business environment, variations in exchange and interest rates, the introduction of competing products, lack of acceptance for new products or services, and changes in corporate strategy. WACKER does not plan to update the forward-looking statements, nor does it assume the obligation to do so.