The register
The register lists Halma Plc in Amersham, Buckinghamshire as a licensed sponsor on Global Business Mobility: Graduate Trainee and Skilled Worker and Global Business Mobility: Senior or Specialist Worker, 3 routes in all, and has done since at least 2026. Its rating on the register is Temporary Worker (A rating), Worker (A rating).
Halma Public Limited Company is the registered name (Companies House number 00040932), a public limited company on the register since 1894. Registered office: Misbourne Court, Rectory Way, Amersham, Buckinghamshire, HP7 0DE, HP7 0DE. By its SIC codes the business is in professional and technical services.
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.