The register
The register lists Calysta UK Ltd in Redcar 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 Calysta (UK) Ltd, number 08919085, incorporated 2014: 12 years of filings behind the name. Registered office: F17 Evolve Business Centre, Cygnet Way, Houghton Le Spring, Tyne And Wear, DH4 5QY, DH4 5QY. Its filed activity puts it in business services.
Holding a licence is the expensive, slow part done. For Calysta UK Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.