The register
The register lists ET2C International (UK) Ltd in London, Hertfordshire 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 ET2C International (UK) Limited, number 08609854, incorporated 2013: 13 years of filings behind the name. Registered office: Bbk Partnership 1 Beauchamp Court, 10 Victors Way, Barnet, Hertfordshire, EN5 5TZ, EN5 5TZ. Its filed activity puts it in business services. It has traded under other names before, including Dragon Racing Limited.
Holding a licence is the expensive, slow part done. For ET2C International (UK) Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.