June 27, 2025 — Just four of the 30 largest tuna-fishing companies in the world disclose their catch data, and more than half of these companies’ catches are completely untraceable, according to a new report compiled by nonprofit financial think tank Planet Tracker.
Planet Tracker’s study, “Tuna Turner: Investors Must Turn Up Transparency in the Tuna Industry,” references Global Fishing Watch data to determine catch volumes by species and region for 2,153 industrial vessels fishing tuna globally, attempting to fill the gaps left by the undisclosed data.