The register
The register lists Arin Power Limited in London 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 Arin Power Limited, number 14343932, incorporated 2022: 4 years of filings behind the name. The registered office is at 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ, WC2H 9JQ. Its filed activity puts it in energy, water and waste.
Holding a licence is the expensive, slow part done. For Arin Power Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.