The register
The register lists Allergy Therapeutics in Worthing, West Sussex as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Allergy Therapeutics PLC is the registered name (Companies House number 05141592), a public limited company on the register since 2004. Registered office: Dominion Way, Worthing, West Sussex, BN14 8SA, BN14 8SA. By its SIC codes the business is in pharmaceuticals. It has traded under other names before, including Netstamp 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.