KDD was founded on 10 January, 1995 as a company providing central securities custody services, clearance and settlement of securities transactions, and maintenance of the central registry of holders of dematerialised securities in the Republic of Slovenia.

KDD has proved its reputation by successful integration into European capital markets and thus contributed significantly to increased efficiency and integration of capital markets. Namely, European Central Bank has proclaimed KDD’s securities settlement systems as fully eligible for use in Eurosystem credit operations. In 2017 KDD successfully connected its infrastructure to uniform European securities settlement platform TARGET2-Securities (T2S). Furthermore, KDD has established links to some prominent (I)CSDs in order to allow efficient and low-risk cross-border securities transfers.