La Montecatini Edison S.p.a., from 1966 to 1969, abbreviated then in Montedison S. Active mainly in the chemistry, he had but interests in numerous other sectors (pharmaceuticals, energy, metallurgy, agri-food, insurance, publishing).
Constants of its history were dualism with the Public Chemical Pole of ENI, the influence by Mediobanca and a fragmented share capital, often devoid of a control shareholder and subject to frequent climbing in the stock exchange.