[4] In 2007, Renco Group lost ownership of its bankrupt subsidiary WCI Steel to its lenders.

[5] Through subsidiary Inteva Products, LLC, Renco Group purchased Delphi's Global Interiors and Closures businesses in March 2008.

[7] The Renco Group also owns various mills and mines in the United States and South America, and pollution problems at some of the company's properties have sparked public outcries, environmental lawsuits, and hundreds of millions of dollars in environmental penalties and fines.

[9][10] Smelting operations by another Renco subsidiary, Doe Run Company, are responsible for elevated levels of lead, arsenic, and cadmium in Herculaneum, Missouri,[11] and elevated levels of lead, copper, zinc, and sulfur dioxide in La Oroya, Peru.

[12] In 2007, La Oroya was listed by Blacksmith Institute as one of the "World's Worst Polluted Places".