The register
The register lists Arithma LLP in Harrow, Middlesex 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 Arithma Limited (company number 06916605), a private limited company incorporated in 2009, 17 years ago. The registered office is at 5 Jardine House Harrovian Business Village, Bessborough Road, Harrow, Middlesex, HA1 3EX, HA1 3EX. It has traded under other names before, including Arithma (UK) Limited, Arithma 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.