CORERO NETWORK SECURITY PLC — Director's Dealing 2026

Feb 4, 2026

National Storage Mechanism | Additional information

RNS Number : 6865R

Corero Network Security PLC

04 February 2026

4 February 2026

Corero Network Security plc

("Corero" or the "Company")

Notice of PDMR Dealings

The Company announces that Carl Herberger, Chief Executive Officer of Corero, has purchased 138,000 Ordinary Shares. Following this purchase, Carl Herberger has a total beneficial interest in 1,835,122 Ordinary Shares equivalent to 0.36% 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	Tel: +44(0)20 7390 0230
Carl Herberger, Chief Executive Officer
Chris Goulden, Chief Financial Officer
Canaccord Genuity Limited (Nominated Adviser and Joint Broker)	Tel: +44(0)20 7523 8000
Simon Bridges / Andrew Potts / Harry Rees Zeus Capital (Joint Broker) Ben Robertson / Ed Beddows	Tel: +44(0)20 3829 5000
Vigo Consulting (U.K Financial PR and Investor Relations)	Tel: +44(0)20 7390 0230
Jeremy Garcia / Anna Sutton
[email protected]
Harbor Access (U.S Investor Relations) Jonathan Paterson	Tel: +1 475 477 9401

About Corero Network Security

Corero Network Security is a leading provider of DDoS protection solutions, specialising in automatic detection and protection solutions with network visibility, analytics, and reporting tools. Corero's technology protects against external and internal DDoS threats in complex edge and subscriber environments, ensuring internet service availability. 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

Carl Herberger

2

Reason for the notification

a)

Position/status

Chief Executive 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)
13.26 pence	138,000 shares

d)

Aggregated information

- Aggregated volume

- Price

N/A

e)

Date of the transaction

3 February 2026

f)

Place of the transaction

London Stock Exchange - AIM

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