The register
Substantial Group, London, holds a Home Office sponsor licence on the Skilled Worker route, and has been on the register since at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Substantial Group Limited, number 12315611, incorporated 2019: 6 years of filings behind the name. Registered office: 167 - 169 5th Floor, Great Portland Street, London, Greater London, W1W 5PF, W1W 5PF. Its filed activity puts it in it, software and media.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.