The register
Aviva 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. Its rating on the register is Worker (A rating), Temporary Worker (A rating).
Aviva PLC is the registered name (Companies House number 02468686), a public limited company on the register since 1990. The registered office is at 80 Fenchurch Street, London, EC3M 4AE, EC3M 4AE. Its filed activity puts it in professional and technical services. It has traded under other names before, including Cgnu PLC, CGU 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.