The register
The register lists Magnite 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. Its rating on the register is Worker (A rating).
Magnite Limited is the registered name (Companies House number 06922381), a private limited company on the register since 2009. The registered office is at 5 New Street Square, London, EC4A 3TW, EC4A 3TW. By its SIC codes the business is in professional and technical services. It has traded under other names before, including The Rubicon Project Ltd.
What the licence tells a candidate is that the door is not locked. Whether it is open this month is a question for Magnite Limited's own careers page and the job boards, and the answer changes with the season and the order book.