CORERO NETWORK SECURITY PLC

Transaction in Own Shares • Jul 21, 2025

National Storage Mechanism | Additional information

RNS Number : 8798R

Corero Network Security PLC

21 July 2025

21 July 2025

Corero Network Security plc

("Corero" or the "Company")

Notice of PDMR Dealings

The Company announces that Chris Goulden, Chief Financial Officer of Corero, has purchased 220,264 Ordinary Shares. Following this purchase, Chris Goulden has a total beneficial interest in 360,887 Ordinary Shares equivalent to 0.07% per cent. of the Company's issued share capital.

The notification below, which has been made in accordance with the requirements of the UK Market Abuse Regulation, provide further detail.

Enquiries:

Corero Network Security plc Carl Herberger, Chief Executive Officer Chris Goulden, Chief Financial Officer	Tel: +44(0)20 7390 0230
Canaccord Genuity Limited (Nominated Adviser and Joint Broker) Simon Bridges / Andrew Potts / Harry Rees	Tel: +44(0)20 7523 8000
Zeus Capital (Joint Broker) Ben Robertson / Ed Beddows	Tel: +44(0)20 3829 5000
Vigo Consulting (Financial PR and Investor Relations) Jeremy Garcia / Kendall Hill / Anna Sutton [email protected]	Tel: +44(0)20 7390 0230
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-and is currently developing 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 headquartered in London and 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 .

Notification and public disclosure of transactions by persons discharging managerial responsibilities and persons closely associated with them.

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Chris Goulden

2

Reason for the notification

a)

Position/status

Chief Financial Officer

b)

Initial notification /Amendment

Initial notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Corero Network Security plc

b)

LEI

2138001EVYT2OI1C4Y98

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Identification code

Ordinary shares of 1p each in Corero Network Security plc

ISIN: GB00B54X0432

b)

Nature of the transaction

Purchase of ordinary shares

c)

Price(s) and volume(s)

Price(s)	Volume(s)
9.08 pence	220,264 shares

d)

Aggregated information

- Aggregated volume

- Price

N/A

e)

Date of the transaction

18 July 2025

f)

Place of the transaction

London Stock Exchange - AIM

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