The French state owns 15% of Renault, and Mr Macron said the government “will be extremely vigilant about the stability of the alliance”.
He also promised to watch out for Renault workers.
Mr Macron spoke to journalists during a visit to Belgium soon after Nissan Motor Co announced that Mr Ghosn would be dismissed because an internal investigation found he had under-reported his income by millions of dollars and engaged in other “significant misconduct”.
Mr Macron and Mr Ghosn visited a Renault plant together in northeast France earlier this month.
Mr Ghosn’s troubles pose questions for the future of the Renault-Nissan-Mitsubishi alliance, which he spearheaded.
