Index CEERIUS (CEE Responsibility Investment Universe) established by Vienna Stock Exchange in January 2009, encompasses successful companies listed in the stock exchanges of Central and East European countries and at the same time leading enterprises in the field of social responsibility and sustainable development. The listing criteria for index which currently includes 16 companies, are verified quarterly. Following a thorough assessment process, Luka Koper joined the enterprises listed in the sustainability index on 21st December 2009.