Sims is the world's largest publicly traded metal and electronics recycler, with about three-fourths of earnings generated in North America and the remainder from Australia and New Zealand. Its main business is the buying, processing, and selling of scrap metal. Sims North American segment comprises the largest ferrous scrap recycler in North America, trading as Sims Metal Management, and 50% owned SA Recycling. Almost all sales are of ferrous metals with less than 10% of sales volumes from more valuable nonferrous metals retrieved in the scrap recycling process.