The register
The register lists Altonexus Limited in Wimbledon, London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Altonexus Limited, number 08274642, incorporated 2012: 14 years of filings behind the name. The registered office is at 50 50 Clarendon Road, London, SW19 2DU, SW19 2DU. Its filed activity puts it in it, software and media. It has traded under other names before, including Service Design Partners Limited.
For a candidate this means one less obstacle: Altonexus Limited already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.