Notice of AGM

The Company has published on its website (www.s4capital.com/investors) the Notice of Annual General Meeting ('AGM') 2026 (the '2026 AGM Notice'). The 2026 AGM Notice is also being distributed to shareowners.

The AGM will be held on Thursday 4 June 2026 at midday (UK time) at Monks, 5th Floor, 15 Bonhill Street, London EC2A 4DN and will also be broadcast live for shareowners to join electronically.

Full details of how to join the meeting either in person or electronically are contained in the 2026 AGM Notice.

In compliance with UK Listing Rule 22.2.6R of the UK Financial Conduct Authority's ('FCA') UK Listing Rules, the 2026 AGM Notice and Proxy Form for the AGM will be submitted to the FCA and will, in due course, be available for inspection at https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

The Company now has approximately 6,200 people in 34 countries with approximately 82% of net revenue across the Americas, 12% across Europe, the Middle East and Africa and 6% across Asia-Pacific. The longer-term objective is a geographic split of 60%:20%:20%. Marketing Services accounted for approximately 91% of net revenue and Technology Services 9%. The target allocation is a practice split of 75%:25%.

Sir Martin Sorrell was CEO of WPP for 33 years, building it from a £1 million 'shell' company in 1985 into the world's largest advertising and marketing services company, with a market capitalisation of over £16 billion on the day he left. Prior to that, Sir Martin was Group Financial Director of Saatchi & Saatchi Company Plc for nine years.