CORERO NETWORK SECURITY PLC

Transaction in Own Shares • Sep 30, 2025

National Storage Mechanism | Additional information

RNS Number : 2896B

Corero Network Security PLC

30 September 2025

30 September 2025

Corero Network Security plc

("Corero" or the "Company")

Further re Directorate Change

Corero (AIM: CNS) (OTCQX: DDOSF) , the distributed denial of service ("DDoS") protection specialists, announces that further to the announcement dated 16 September 2025, Ashley Stephenson, Chief Technology Officer, has today stepped down from the Company's Board. As per the 16 September 2025 announcement, Ashley will remain in his role as Chief Technology Officer until 31st December 2025, at which time he will retire from the Company.

Jens Montanana, Chairman at Corero, commented:

"Ashley has been instrumental in developing Corero's industry leading DDoS protection solutions during his twelve years at the Company. On behalf of myself and the Board I wish Ashley the very best in his future beyond Corero."

Enquiries:

Corero Network Security plc	Tel: +44(0)20 7390 0230
Carl Herberger, Chief Executive Officer
Chris Goulden, C hief Financial Officer
C anaccord Genuity Limited (Nominated Adviser and Joint Broker)	Tel: +44(0)20 75 23 8000
S imon Bridges / Andrew Potts / Harry Rees Zeus Capital (Joint Broker) Ben Robertson / Ed Bellows	Tel: +44(0)20 3829 5000
Vigo Consulting (Financial PR and Investor Relations)	Tel: +44(0)20 7390 0230
Jeremy Garcia / Anna Sutton
[email protected]
Harbor Access (Investor Relations) Jonathan Paterson	Tel: +1 475 477 9401

About Corero Network Security

Corero Network Security is a leading provider of DDoS protection solutions, delivering real-time, automated detection and mitigation with deep network visibility and analytics. Corero safeguards critical infrastructure across diverse deployment models-from inline to edge to hybrid cloud-through its SmartWallONETM solution and CORE, an observability and resiliency ecosystem to unify defensive actions across the modern threat landscape. With operational centres in Marlborough, Massachusetts, USA, and Edinburgh, UK, Corero is listed on the London Stock Exchange's AIM market (ticker: CNS) and the US OTCQX Market (OTCQX: DDOSF).

For more information, visit   www.corero.com , and follow us on   LinkedIn   and   X .

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