The register
The register lists Fringe Limited in 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 Fringe Limited, number 04756682, incorporated 2003: 23 years of filings behind the name. Registered office: 73 New Oxford Street, London, WC1A 1DG, WC1A 1DG. By its SIC codes the business is in retail.
Holding a licence is the expensive, slow part done. For Fringe Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.