The register
The register lists Rightmove Group Ltd in Milton Keynes 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).
Companies House lists it as Rightmove Group Limited, number 03997679, incorporated 2000: 26 years of filings behind the name. Registered office: 2 Caldecotte Lake Business Park Caldecotte Lake Drive, Caldecotte, Milton Keynes, MK7 8LE, MK7 8LE. Its filed activity puts it in it, software and media. It has traded under other names before, including Rightmove PLC, Rightmove Limited.
Holding a licence is the expensive, slow part done. For Rightmove Group Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.