The register
The register lists Firstsource Solutions UK Limited in London as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Skilled Worker, 2 routes in all, and has done since at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Firstsource Solutions UK Limited, number 03999896, incorporated 2000: 26 years of filings behind the name. The registered office is at Lynton House, 7-12 Tavistock Square, London, WC1H 9LT, WC1H 9LT. By its SIC codes the business is in business services. It has traded under other names before, including Icici Onesource Ltd, Customerasset Limited.
Holding a licence is the expensive, slow part done. For Firstsource Solutions UK Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.