Nutrien Ltd, formerly PotashCorp is the world's largest fertilizer company measured by capacity. The company's main focus is potash, where it is the global leader in installed capacity with a roughly 20% share. PotashCorp is also a player in the nitrogen and phosphate industries, ranking in the top five in global production of each nutrient. The company is focused on increasing its potash business, and recently added brownfield expansions have widened capacity.