Seafood companies rarely disclose what or where they are fishing. To provide a first overview of the fishing industry in the high seas-the area beyond national jurisdiction-we linked fishing activity in the high seas to vessel owners and corporate actors. We identified 1,120 corporate actors for 2,482 vessels (similar to 2/3 of high seas fishing vessels and effort in 2018) and found that the top 100 corporate actors account for 36% of all high seas fishing effort. As attribution for anthropogenic activities expands beyond a national framework, we demonstrate the feasibility of methods to identify the high seas fishing industry. These results provide a unique lens through which to view accountability for the use and protection of marine biodiversity.