Takeover by Suez and nationalization
From 1965 to 1971, the CIC was at the center of a major takeover battle. In reaction to the Suez Company's purchase of a 20% equity stake in the Banque de l'Union parisienne (BUP) in February 1965, CIC chairman Edmond Lebée reached out to Suez's rival the Banque de Paris et des Pays-Bas (also known as Paribas) to explore a possible merger, whose project leaked in the press on 1966/06/05. In the summer of 1968, the situation escalated into a takeover battle on the Paris stock exchange, following which neither Paribas nor Suez succeeded in acquiring a majority of the CIC's shares. Eventually, on 1971/09/10, the two bidders reached an agreement under which Suez would take control of the CIC, while ceding the BUP to Paribas. Suez, however, kept a hands-off approach and did not include the CIC in the 1975 merger that created Banque Indosuez.
Meanwhile, like many other European banks, from the late 1960s the CIC accelerated its international development. It opened an office in Frankfurt in 1969, followed by others in Latin America, Beirut, Tokyo, Hong Kong, Sydney, and Milan. In 1974, it opened a branch in New York, its second only after the one in London. By 1977, it had 21 representative offices abroad. In 1979, the CIC acquired a 25% stake in the Banque Nagelmackers in Belgium. Its network of regional banks was further strengthened by the respective mergers, of Société nancéienne and Banque Varin-Bernier to form Société Nancéienne Varin-Bernier (SNVB) in 1972, and of Banque Scalbert and Banque Dupont in Northern France to form Banque Scalbert-Dupont (BSD) in 1977.
In 1982, the CIC was nationalized under François Mitterrand's Socialist presidency, together with most of the affiliated regional banks and with its parent, the Suez Company. This triggered significant restructuring. In July 1983, the CIC acquired the Banque de l'Union Européenne (BUE), an investment bank. The BUE had been born in 1968 from a restructuring of the Union Européenne Industrielle et Financière (UEIF), created in 1920 by Eugène Schneider II together with the Banque de l'Union Parisienne and the Empain group in relation with their business interests in the Little Entente countries, especially Czechoslovakia. The CIC then created a subsidiary, CIC-Paris, which took over the Parisian banking activity as well as Banque Transatlantique and the stakes in foreign banks. Both the BUE and CIC-Paris became fully owned subsidiaries of a parent holding company, the Compagnie financière de CIC, which also held the stakes in the regional banks outside Paris. Then, in 1985 the government encouraged the insurer Groupe des Assurances Nationales (GAN) to build up a stake in CIC, which reached 34% in January 1986. Meanwhile, CIC was recapitalized by the state in 1983 and in 1985. In 1987, full ownership of the regional banks (except the Crédit fécampois which had been too small for nationalization in 1982) was transferred to the Compagnie financière de CIC, which in June 1988 left the historic head office on rue de la Victoire for a new headquarters at 52, rue de Monceau. In 1989, the GAN raised its stake to 56%, then 82% in 1991 and 92.6% in 1995, an unusual case of a major banking group owned by an insurance company. In 1990, the BUE incurred major financial difficulties and was merged into the Compagnie financière which thus took the new name Union Européenne de CIC (UE-CIC) and relocated once more, to the BUE's former Parisian headquarters at 4, rue Gaillon. In 1993, the CIC-Paris moved across street from its longstanding head office at 66, rue de la Victoire, which it had sold in late 1989, to a renovated complex of buildings between the rue de la Victoire, rue Taitbout, and rue de Provence, known as the "VTP building" for the three streets' initials, including the former head office of Société Générale