The register
The register lists Amphitrite Underwriting 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 Amphitrite Underwriting Limited (company number 11309258), a private limited company incorporated in 2018, 8 years ago. Registered office: 2nd Floor Hygeia House, 66 College Road, Harrow, Middlesex, HA1 1BE, HA1 1BE. Its filed activity puts it in finance and insurance. It has traded under other names before, including Amphitrite UW Limited.
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.