I haven't worked there for a few years, but I'm 99% sure that German stock exchange in Frankfurt (https://www.deutsche-boerse.com/dbg-en https://www.deutsche-bo

I haven't worked there for a few years, but I'm 99% sure that German stock exchange in Frankfurt (https://www.deutsche-boerse.com/dbg-en https://www.deutsche-boerse.com/dbg-en) is still operating their clearing operations (central counterparty) and some others on OpenVMS/Itanium servers from HP