The register
The register lists Thriv Limited in Reading as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is Thriv Ltd (company number SC713079), a private limited company incorporated in 2021, 5 years ago. Registered office: 34d Castlegate, Jedburgh, Scottish Borders, TD8 6BB, TD8 6BB. Its filed activity puts it in retail.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.