The register
Fluidstack Ltd, London, holds a Home Office sponsor licence on the Skilled Worker route, and has been on the register since at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Fluidstack Ltd, number 10985545, incorporated 2017: 9 years of filings behind the name. Registered office: Third Floor, 20 Old Bailey, London, EC4M 7AN, EC4M 7AN. By its SIC codes the business is in it, software and media. It has traded under other names before, including Flare Social Ltd.
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.