The register
The register lists OpenX 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 Openx Limited, number 04646644, incorporated 2003: 23 years of filings behind the name. Registered office: Suite 1, 7th Floor, 50 Broadway, London, SW1H 0DB, SW1H 0DB. By its SIC codes the business is in it, software and media. It has traded under other names before, including M3 Media Services Limited, Awarez Limited.
Holding a licence is the expensive, slow part done. For OpenX Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.