The register
3i plc is licensed to sponsor on Global Business Mobility: Senior or Specialist Worker and Global Business Mobility: Graduate Trainee and Skilled Worker. Its entry on the register dates back to at least 2026, and the organisation is based in London. The register records its rating as Worker (A rating), Temporary Worker (A rating).
At Companies House the business is 3I PLC (company number 00397156), a public limited company incorporated in 1945, 81 years ago. The registered office is at 1 Knightsbridge, London, SW1X 7LX, SW1X 7LX. Its filed activity puts it in finance and insurance. It has traded under other names before, including Investors in Industry PLC, Ffi (UK Finance) Public Limited Company.
For a candidate this means one less obstacle: 3i plc already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.