The register
ATC Holdings Limited, Poyle, 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).
At Companies House the business is Atc Holdings Limited (company number 03377264), a private limited company incorporated in 1997, 29 years ago. The registered office is at 14th Floor 33 Cavendish Square, London, W1G 0PW, W1G 0PW. By its SIC codes the business is in other services. It has traded under other names before, including Goldpower Engineers Limited.
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.