The register
The register lists Superunion Limited in London as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Skilled Worker, 2 routes in all, and has done since at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Superunion Limited, number 01263713, incorporated 1976: 50 years of filings behind the name. Registered office: Sea Containers, 18 Upper Ground, London, SE1 9PD, SE1 9PD. Its filed activity puts it in business services. It has traded under other names before, including The Brand Union Ltd, Enterprise IG Limited.
Holding a licence is the expensive, slow part done. For Superunion Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.