Madeco is a 47.7%-owned consolidated subsidiary of Quiñenco.

With ample experience in the development of copper and aluminum based products, Madeco manufactures sheets, tubes, metal plates and sidings, as well as flexible packages, all key elements in important economic sectors such as construction, mining exploration, energy, and general and consumer industries.

Madeco is made up of three business units - flexible packaging, brass mills and aluminum & PVC profiles - with operations in Chile, Argentina and Peru. It also exports a variety of products to Latin America, the United States and Europe.

In late 2007, Madeco announced that it had reached a historic agreement with the French cable producer, Nexans, to transfer 100% of its cable operations in Chile, Brazil, Peru, Argentina and Colombia to Nexans in exchange for US$448 million and an 8.9% interest in Nexans, the largest cable producer in the world.

This transaction was completed in September 2008, allowing the companies to join forces, in a worldwide network. Madeco also became the largest single shareholder of Nexans and, in turn, Nexans established an important presence in South America. Madeco now holds a 9.2% stake in Nexans.