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System1 Group PLC
System1: the creative effectiveness platform that predicts & improves the commercial impact of ads & ideas. We help the world’s leading brands to create with confidence. The company’s own description of itself, taken from its website.
Active 19 years old · 2,321st oldest of 4,506 · incorporated in the 2000s
Registered office
4 MORE LONDON RIVERSIDE, LONDON, SE1 2AU
Other PLCs registered in London
Online
Website system1group.com
News and announcements on their own site
Found by searching for the company name and kept only where the domain matches it. Social accounts are listed only where the company links to them from its own site. Nothing here is supplied by the company to us.
Filing history
This company has 309 documents on its Companies House record. The most recent accounts were filed on 17/10/2025. Its last confirmation statement or annual return was filed on 03/10/2025.
The most recent filings
This is the list of documents filed, not their contents. A line saying accounts were filed records that they were filed and when; it says nothing about turnover, profit or assets, which are inside the documents themselves and are not published here. Read the filings on the Companies House record.
Who runs it
The register lists 8 current officers and 17 who have resigned.
Who controls it
The register shows no current person or entity with significant control for this company.
Charges
A charge is security a company gives a lender over its assets. This company has 2 registered charges, of which 2 are not yet recorded as satisfied.
Hsbc UK Bank PLC Outstanding, created 10/02/2020
Hsbc Bank PLC Outstanding, created 02/08/2016
Officers, controllers and charges are as recorded on the Companies House register on 13/10/2026, and the register changes daily. Appearing here is not an allegation about anyone. Read the current record on the Companies House record.
What it does
- 73200 - Market research and public opinion polling
This page is compiled from the public register. Companies House does not verify the information filed with it, so treat everything here as what the company reported rather than as established fact. For filings, officers and charges, see the official Companies House record.
Also at SE1 2AU
A shared registered office is not evidence of a relationship. Formation agents and genuine groups look identical on the register.
On the register
- 2,321st oldest of 4,506 PLCs
- One of the 2000s cohort
- Not in liquidation or facing strike off
There are 4,506 PLCs in Britain, under a tenth of one per cent of the register. The whole count.