The register
The register lists SolGold in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Solgold Limited is the registered name (Companies House number 05449516), a private limited company on the register since 2005. The registered office is at 1 Cornhill, London, EC3V 3ND, EC3V 3ND. Its filed activity puts it in mining and quarrying. It has traded under other names before, including Solgold PLC, Solomon Gold PLC.
Holding a licence is the expensive, slow part done. For SolGold the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.