The register
Sigma Labs Xyz Ltd, London, holds a Home Office sponsor licence on the Skilled Worker route, and has been on the register since at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Sigma Labs Xyz Ltd, number 13174424, incorporated 2021: 5 years of filings behind the name. Registered office: 20-22 Wenlock Road, London, N1 7GU, N1 7GU. By its SIC codes the business is 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.