[1] The company was founded in 1912 as Diamond Walnut Growers, Inc., a member-owned Californian agricultural cooperative association.

In July 2005, Diamond Walnut Growers converted to a Delaware corporation and initial public offering of stock as Diamond Foods.

The company has about 1400 full-time employees in Wisconsin, Indiana, Tennessee, Alabama and the United Kingdom.

Diamond does not grow any of its own crops; it purchases raw material from domestic and international sources.

Diamond products are processed and packaged at facilities in Stockton, California; Salem, Oregon; Van Buren, Indiana; Beloit, Wisconsin; Robertsdale, Alabama; and Norwich in the United Kingdom.