The register
The register lists Willis 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. Its rating on the register is Worker (A rating).
Companies House lists it as Willis Limited, number 00181116, incorporated 1922: 104 years of filings behind the name. The registered office is at 51 Lime Street, London, EC3M 7DQ, EC3M 7DQ. Its filed activity puts it in finance and insurance. It has traded under other names before, including Willis Faber & Dumas Limited, Willis, Faber & Dumas 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.