The register
The register lists AltynGold plc in Rikmansworth as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Altyngold PLC, number 05048549, incorporated 2004: 22 years of filings behind the name. Registered office: 28 Eccleston Square, London, SW1V 1NZ, SW1V 1NZ. Its filed activity puts it in mining and quarrying. It has traded under other names before, including Altyn PLC, Goldbridges Global Resources PLC.
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.