The register
The register lists Exa Infrastructure UK Limited 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 Exa Infrastructure UK Limited (company number 04472687), a private limited company incorporated in 2002, 24 years ago. Registered office: 5th Floor 40 Strand, London, WC2N 5RW, WC2N 5RW. Its filed activity puts it in it, software and media. It has traded under other names before, including Interoute Communications Limited, Mawlaw 584 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.