The register
The register lists Topstitch Ltd 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).
At Companies House the business is Topstitch Ltd (company number 11631634), a private limited company incorporated in 2018, 8 years ago. Registered office: Unit 6b Haslemere Business Centre, Lincoln Way, Enfield, EN1 1TE, EN1 1TE. Its filed activity puts it in manufacturing.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.