The register
The register lists Tallarium Limited in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. The register records its rating as Worker (A rating).
At Companies House the business is Tallarium Limited (company number 09461416), a private limited company incorporated in 2015, 11 years ago. Registered office: 16 Great Queen Street, Covent Garden, London, WC2B 5AH, WC2B 5AH. Its filed activity puts it in it, software and media.
Holding a licence is the expensive, slow part done. For Tallarium Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.