The register
The register lists Proteotype Diagnostics Ltd in Cambridge as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
At Companies House the business is Proteotype Diagnostics Ltd (company number 12273695), a private limited company incorporated in 2019, 7 years ago. Registered office: Babraham Research Campus, Babraham, Cambridge, CB22 3AT, CB22 3AT. Its filed activity puts it in professional and technical services.
Holding a licence is the expensive, slow part done. For Proteotype Diagnostics Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.