CF Industries Holdings, Inc. is an American manufacturer and distributor of agricultural fertilizers, including ammonia, urea, and ammonium nitrate products. The company is based in Northbrook, Illinois, a suburb of Chicago, and was founded in 1946 as the Central Farmers Fertilizer Company. For its first 56 years, it was a federation of regional agricultural supply cooperatives. CF then demutualized, and became a publicly traded company. Wikipedia