National Storage Mechanism | Additional information

14 October 2025

System1 Group PLC (AIM: SYS1)

("System1", or "the Company", or "the Group")

Capital Markets Day

System1 Group plc (AIM: SYS1) is pleased to announce that it will be hosting a Capital Markets Day via the Investor Meet Company platform on Wednesday 22 October 2025 at 3pm BST.

This virtual event will be an opportunity for investors to learn more about the Company's plans for Test Your Innovation and Test your Ad, including the Company's AI strategy in relation to these product areas. The event will begin with a review of H1 trading.

Speakers will include James Gregory (Chief Executive Officer), Chris Willford (CFO), Jon Evans (Chief Customer Officer) Rebecca Hatherall (Chief Strategy and Operations Officer) and Tristan Findlay (Managing Director Innovation).

The presentation is open to all existing and potential shareholders. Questions can be submitted pre-event via your Investor Meet Company dashboard up until 21 Oct 2025, 09:00 BST, or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet SYSTEM1 GROUP PLC via:

https://www.investormeetcompany.com/system1-group-plc/register-investor

Investors who already follow SYSTEM1 GROUP PLC on the Investor Meet Company platform will automatically be invited.

For any queries please email: [email protected]

The Company can be found at www.system1group.com .

For further information, please contact:

System1 Group PLC	Tel: +44 (0)20 7043 1000
James Gregory, Chief Executive Officer
Chris Willford, Chief Financial Officer
Canaccord Genuity Limited	Tel: +44 (0)20 7523 8000
Simon Bridges / Andrew Potts / Harry Rees

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