Archer Daniels Midland Co. and Millennium Ethanol LLC have formed an ethanol marketing agreement, under which ADM will market all ethanol produced by Millennium Ethanol at its planned 100-million-gallon Marion, South Dakota facility, according to an ADM company release. Millennium Ethanol is owned by 914 South Dakota investors, including farmers and business people from across the state. ADM is the number one ethanol producer in the nation.