The register
The register lists Clanmark 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 the business as Clanmark Ltd, company number 16417149, a private limited company. The registered office is at 39 Long Acre, London, Greater London, WC2E 9LG, WC2E 9LG. Its filed activity puts it in it, software and media.
For a candidate this means one less obstacle: Clanmark Ltd already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.