The register
The register lists Alexander Maltby Ltd in London, 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 Alexander Maltby Limited, number 03039779, incorporated 1995: 31 years of filings behind the name. Registered office: 109 Saint Johns Hill, London, SW11 1SY, SW11 1SY. By its SIC codes the business is in construction.
Holding a licence is the expensive, slow part done. For Alexander Maltby Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.