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Publication of inside information pursuant to Article 17 MAR - Change in the Management Board of secunet Security Networks AG: Marc-Julian Siewert to become new Chairman of the Management Board; Axel Deininger's mandate will not be extended after 2025

The Supervisory Board of secunet Security Networks AG (ISIN DE0007276503, WKN 727650) today resolved changes to the Management Board of secunet Security Networks AG: The Supervisory Board and CEO Axel Deininger have agreed not to extend his contract beyond the regular expiry on December 31, 2025.

In light of the future expansion of the business, the Supervisory Board plans to appoint Marc-Julian Siewert to the Management Board from July 1, 2025. He is also the designated successor to the CEO.

Marc-Julian Siewert possesses long-standing experience in business with public authorities as CEO of the provider for identity solutions Veridos, a joint venture of Giesecke+Devrient and Bundesdruckerei group.

The Supervisory Board would like to take this opportunity to thank Axel Deininger for his consistently trusting and successful cooperation, particularly during the transformation of secunet's business model in recent years.

From 1st July 2025, the Management Board is therefore expected to consist of Axel Deininger (CEO), Torsten Henn, Dr. Kai Martius, Jessica Nospers and Marc-Julian Siewert.

Disclaimer

This release contains forward-looking statements. Forward-looking statements are statements that are not historical facts; they include statements about our beliefs and expectations. Any statement in this release that expresses our intentions, beliefs, expectations or projections (and the assumptions underlying them) is a forward-looking statement. These statements are based on plans, estimates and forecasts that are currently available to the management of secunet Security Networks AG. Forward-looking statements therefore relate only to the date on which they are made. We assume no obligation to update such statements in the light of new information about future events.

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