The register
The register lists Hmk London Ltd in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Hmk London Ltd, number 09406537, incorporated 2015: 11 years of filings behind the name. Registered office: 10 High Street Plaistow, London, E13 0AJ, E13 0AJ. By its SIC codes the business is in it, software and media.
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.