Mitsui has led a series D round for the feedstock protein producer that included existing investor and strategic partner Cargill.

US-based food technology producer Calysta collected $40m on Monday in a series D round led by diversified conglomerate Mitsui & Co that included agribusiness Cargill.

The round included Singaporean state-owned investment firm Temasek, Pangaea Ventures, the Municipal Employee Retirement System (MERS) of Michigan, Walden Riverwood Ventures and Aqua-Spark.

Calysta originally developed materials for consumer and industrial energy products, but has since pivoted to focus on a protein called FeedKind that is used as a feed ingredient for fish, livestock and…