Entropay | 1,200 followers on LinkedIn. Entropay is a wholly-owned subsidiary of Ixaris Group Holdings Limited. | Entropay is a wholly-owned subsidiary of Ixaris Group Holdings Limited. Entropay is registered in England and Wales, with company number 04072405 and registered office at 2 Stephen Street, London, W1T 1AN. Entropay is authorised by the Financial Conduct Authority under the Electronic Money Regulations 2011 (FRN No: 900800) for the issuing of electronic money.