The register
The register lists Xap Therapeutics Limited in Babraham, Cambridgeshire as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Xap Therapeutics Limited, number 10613866, incorporated 2017: 9 years of filings behind the name. The registered office is at Babraham Research Campus, Maia Building (B270), Cambridge, CB22 3AT, CB22 3AT. By its SIC codes the business is in finance and insurance. It has traded under other names before, including Rockend Limited.
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.