The Tuna 30

The Tuna 30 Dashboard accompanies the report “Tuna Turner: Investors must turn up transparency in the tuna industry”. It assesses the transparency of the 30 largest tuna harvesters globally, which together account for an estimated 46% of global tuna catch. Most companies disclose very little, increasing investor risk: only four out of 30 firms report any tuna catch volumes, and just one (Bolton Group) discloses across species, location, gear and certification levels. Without this data, investors cannot know which companies are exposed to risks such as overfishing or unsustainable harvesting methods