The register
The register lists Phi Design Ltd in Northamptonshire 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).
Phi Design Limited is the registered name (Companies House number 01770698), a private limited company on the register since 1983. Registered office: Chestnut Field House, Chestnut Field, Rugby, Warwickshire, CV21 2PD, CV21 2PD. Its filed activity puts it in manufacturing and engineering.
Holding a licence is the expensive, slow part done. For Phi Design Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.