The register
The register lists Circle 13 Limited in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Circle13 Limited, number 15245323, incorporated 2023: 3 years of filings behind the name. Registered office: 11b Kingsland Road, London, E2 8AA, E2 8AA. Its filed activity puts it in arts, sport and leisure.
For a candidate this means one less obstacle: Circle 13 Limited already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.