The register
The register lists Abacus Ark 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 Abacus Ark Ltd (company number 08139112), a private limited company incorporated in 2012, 14 years ago. Registered office: 7 St John's Road, London, SW11 1QN, SW11 1QN. Its filed activity puts it in education.
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.