"Euroclear is a user-owned, user-governed, Belgium-based financial services company that specializes in the settlement of securities transactions. It was founded in 1968 as part of J.P. Morgan & Co. Euroclear settles domestic and international securities transactions, covering bonds, equities, derivatives and Investment funds. Euroclear provides securities services to financial institutions located in more than 80 countries. In addition to its role as an International Central Securities Depository (ICSD), Euroclear also acts as the Central Securities Depository (CSD) for Belgian, Dutch, French, Irish, and UK securities. Euroclear also owns EMXCo, the UK's leading provider of Investment-fund order routing. Euroclear is the largest international central securities depository in the world." [extract from its website]Official web-site: www.euroclear.com

To know more about it, look at what we have already written on this subject