Here's a list of the top shareholders in Marine Harvest - headed by Norway's richest person John Fredriksen worth 10 billion Euros (and 146th richest billionaire in the world according to Bloomberg), Norwegian pension fund Folketrygdfondet, US investment firm BlackRock and the Canadian Pension Plan Investment Board:
Marine Harvest list the top 20 shareholders as follows:
Here's a more in-depth analysis by Marine Harvest:
Here's an analysis by The Financial Times: