Calysta

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Calysta is a private biotechnology company based in Menlo Park, California. It was founded in 2012 by Josh Silverman, and its CEO is Alan Shaw. The company makes animal and fish feed ingredients by turning methane into single‑cell protein through gas fermentation using naturally occurring methanotrophic bacteria.

Its main product is FeedKind protein, designed to be used as a substitute or supplement for fishmeal and fish oil in farmed fish and livestock feeds. In 2016, Calysta opened a pilot production facility in Teesside, England, with support from a UK government grant, to test the methane‑to‑protein process. That site has since been decommissioned as the company shifted to commercial-scale manufacturing in China.

Calysta has raised funding from investors including Aqua-Spark, Cargill, Mitsui & Co., and Temasek. The company’s first commercial‑scale facility is in Chongqing, China, with a production capacity of about 20,000 tonnes per year.

The process uses methane from natural gas and works with methanotroph bacteria (not genetically modified) to produce protein for animal feeds. The technology builds on earlier gas‑fermentation research and originated from scientists at DNA2.0/ATUM.