Cumerio

On 17 December 2008, Cumerio and Norddeutsche Affinerie AG (NA) became Aurubis - Europe's biggest copper producer.

Cumerio is (was) a copper refining company formed in 2005 by the division of the copper activity of Umicore. The Cumerio shares were first listed on Euronext Brussels on 29 April 2005, and delisted from Euronext Brussels on 17 December 2008 as a result of the squeeze-out after merging with Norddeutsche Affinerie AG.

Cumerio was active in smelting, refining and recycling of copper. The headquarters was located in Brussels. The production plants were located at:
 * Pirdop (Bulgaria): refinery (smelter) for the production of copper anodes;
 * Olen (Belgium): refinery (electrolysis) of high purity copper anodes / cathodes, and production of rolling thread;
 * Avellino (Italy): production of wires and wire rods;
 * Yverdon-les-Bains (Switzerland), Swiss Advanced Materials SA (SAM): production of complex profiles.

Acquisition by Norddeutsche Affinerie AG
In June 2007, the German copper processor Norddeutsche Affinerie AG (NA) expressed its interest to take over Cumerio. On 23 January 2008 the European Commission accepted the transaction.

On 14 April 2008 Cumerio became part of the NA Group. This made it the largest copper producer in Europe.