KATEK SE

Stabilisation Announcement

NOT FOR RELEASE OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA OR JAPAN OR ANY OTHER JURISDICTION IN WHICH SUCH RELEASE OR DISTRIBUTION WOULD BE UNLAWFUL. OTHER RESTRICTIONS ARE APPLICABLE. PLEASE SEE THE IMPORTANT NOTICE AT THE END OF THIS ANNOUNCEMENT.

KATEK SE

Notice of Greenshoe Option Exercise under Article 8(f), and the Expiry of the Stabilisation Period under Article 5 Paragraphs 4 and 6 of the Delegated Act (EU) 2016/1052 of the Commission of 8 March 2016

The option granted by certain shareholders of KATEK SE (Contact: Ms Christina Fischer-Friedrich, Tel: 2 67) (ISIN DE000A2TSQH7; WKN A2TSQH; Ticker Symbol KTEK) to Hauck & Aufhäuser Privatbankiers AG as Stabilisation Manager to purchase up to 514,962 additional shares of KATEK SE at the placement price in the amount in which shares borrowed in connection with an over-allotment had been sold (the so-called Greenshoe option), was exercised by Hauck & Aufhäuser Privatbankiers AG in full, in the amount of 514,962 shares, on 25 May 2021. Hauck & Aufhäuser Privatbankiers AG has announced that, as of 25 May 2021 (XETRA close of trading), it has completed stabilisation measures in its role as Stabilisation Manager, and that shares of KATEK SE were neither purchased nor sold.

Important Notice

This announcement does not contain or constitute an offer to sell nor a solicitation to buy or subscribe for securities.

This announcement is not a prospectus. Potential investors should not purchase or subscribe for any securities referred to in this announcement except on the basis of the information contained in the prospectus of the Company (including any supplements thereto) which has been approved by the German federal financial supervisory authority (Bundesanstalt für Finanzdienstleistungsaufsicht - BaFin) and immediately published thereafter. Copies of such prospectus are available free of charge from KATEK SE, as well as, for viewing in electronic form, on the website of the Company.

This announcement is not an offer of securities for sale in the United States of America (the "United States"). Securities may not be offered or sold in the United States absent registration or an exemption from registration under the U.S. Securities Act of 1933, as amended. Any public offering of securities to be made in the United States would be made by means of a prospectus that could be obtained from the Company and that would contain detailed information about the Company and its management, as well as the financial statements of the Company. There will be no public offer of the securities in the United States.

In the United Kingdom, this information is directed at and/or for distribution only to (i) investment professionals falling within article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the "Order"), or (ii) high net worth companies falling within article 49(2)(a) to (d) of the Order (all such persons are collectively referred to herein as "relevant persons"). The securities are only available to, and any invitation, offer or agreement to subscribe, purchase or otherwise acquire such securities will be engaged in only with, relevant persons. Any person who is not a relevant person should not act or rely on this information or any of its contents.

In member states of the European Economic Area ("EEA"), in which the Regulation (EU) 2017/1129 as amended (the "Prospectus Regulation") is in effect other than Germany (the "Relevant Member States"), this announcement, and any offer following it, is only addressed to persons who are 'qualified investors' within the meaning of Article 2(e) of the Prospectus Regulation ("Qualified Investors"). It is assumed that each person in the Relevant Member States who acquires or is offered securities as part of an offering (an "Investor") has represented and agreed that such person is a Qualified Investor; that securities purchased by such person as part of the offering are not being purchased for any person in the EEA other than a Qualified Investor or persons in Germany or another Relevant Member State with comparable legal provisions, with respect to whom the Investor may make decisions at its own discretion; and that the securities would not be purchased for offer or re-sale in the EEA, if this would lead to KATEK SE or any of its affiliates being required to publish a prospectus under Article 3 of the Prospectus Regulation.

Subject to certain exceptions, the securities referred to herein may not be offered or sold in Australia, Canada or Japan or to, or for the account or benefit of, any national, resident or citizen of Australia, Canada or Japan.

The offered shares have already been sold.