The register
The register lists Diona (UK) Limited in Chester 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).
At Companies House the business is Diona (UK) Limited (company number 08155896), a private limited company incorporated in 2012, 14 years ago. Registered office: 4 Chantry Court, Chester, CH1 4QN, CH1 4QN. Its filed activity puts it in it, software and media. It has traded under other names before, including Diona Technologies (UK) Limited.
For a candidate this means one less obstacle: Diona (UK) Limited already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.