The register
X Internet UK Limited is licensed to sponsor on Skilled Worker and Global Business Mobility: Senior or Specialist Worker. Its entry on the register dates back to at least 2026, and the organisation is based in London. Rating on the current register: Worker (A rating).
At Companies House the business is X Internet UK Limited (company number 07653064), a private limited company incorporated in 2011, 15 years ago. The registered office is at Twitter Uk Ltd, 1st Floor, 20 Air Street, London, W1B 5AN, W1B 5AN. By its SIC codes the business is in it, software and media. It has traded under other names before, including Twitter UK Ltd, Twitter UK 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.