The BEL 20 is the benchmark stock market index of Euronext Brussels. In general, the index consists of a minimum of 10 and a maximum of 20 companies traded at the Brussels Stock Exchange. Since 20 June 2011, the BEL20 has contained 20 listings, with the exception a one month period in May-June 2018 when Ablynx stock was removed following the takeover by Sanofi, only to be replaced mid June by arGEN-X.
|Foundation||30 December 1990|
|Market cap||€287.5 billion (end 2018)|