The register
The register lists Atlantico UK Ltd in Croydon, Surrey as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Atlantico (UK) Limited, number 03076022, incorporated 1995: 31 years of filings behind the name. Registered office: Unit 1, Zk Park, 23 Commerce Way, Croydon, Surrey, CR0 4ZS, CR0 4ZS. Its filed activity puts it in retail. It has traded under other names before, including Atlantico Import Export Limited.
Holding a licence is the expensive, slow part done. For Atlantico UK Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.