2000
Grupo Mexico Sells American Limestone Company to CSR America for $211M. Grupo Mexico Forms Americas Mining Corporation (AMC) to include ASARCO, SPCC and Minero Mexico, to be headquartered in Phoenix, Arizona.
2001
ASARCO suspends operations at East Helena, an original M. Guggenheim facility. ASARCO suspends operations at the Tennessee Mines Division. ASARCO reduces mine production at Mission by 61 percent.
2002
ASARCO reduces mine production at Mission to 15% of total capacity.
2003
ASARCO sells its interest in SPCC to AMC
2005
ASARCO files Chapter 11 Proceedings for five non-operating, dormant subsidiaries. ASARCO files Chapter 11 Proceedings on August 10th..
2006
ASARCO closes the Globe (Denver) High-Purity Metals plant; the last of the original M. Guggenheim facilities.
2008
Sterlite Industries Agrees to Purchase ASARCO for $2.6 Billion; later withdraws bid
2009
ASARCO Emerges from Bankruptcy and Re-integrates into Grupo Mexico