Sigma Lithium, which produces metal used in electric vehicle batteries, has sued a former co-chief executive officer, accusing him of stealing trade secrets to undermine the company's effort to sell itself.
The complaint was filed on Monday in federal court in Manhattan against Calvyn Gardner, who until January was Sigma's co-CEO with Ana Cabral-Gardner, who he is divorcing and who remains CEO. Luisa Valim, Gardner's daughter-in-law, is also a defendant.
