James Cargill II is an American businessman, & is one of the members of the very wealthy, & very low profile Cargill Family. The members of the family are heirs to the largest privately held corporation in the US. William W. Cargill started the Cargill Company in Iowa, in the late 1800s. James Cargill II is his great-grandson. The members of the family still own 88% of the company, but their actual wealth is not known. James Cargill II has an estimated net worth of $2.6 billion dollars.