Warrenton was originally founded in 1970. It was subsequently acquired in February, 2000 by a Canadian investment group, and is now known as Warrenton Copper LLC.

The company produces fire-refined copper ingot from secondary copper feedstock and has a nominal capacity of 250,000 pounds per day.

Warrenton Copper is now an affiliate of AIM, a major recycler of ferrous and non-ferrous metals and a global supplier of solder products and casting metals to the electronics, automotive and construction industries.

The AIM group has been in business for over 60 years, and includes the following wholly-owned subsidiaries: American Iron & Metal Co Inc, AIM Products Inc, AIM USA, AIM Primary, Soldadura de Mexico SA de CV. AIM holds substantial interests in Cardinal Metal Inc, Conversion Resources Inc, Metaux Depot Inc and Delsan-AIM Inc.