Pigasse has held meetings with Socialist, Green, and Communist leaders.
He aims to unite the left without criticizing radical candidate Jean-Luc Mélenchon.
The businessman has long harbored dreams of a political career.
2027 French presidential election: 'I am available,' investment banker Matthieu Pigasse tells the left
Investment banker Matthieu Pigasse expresses his political ambitions while seeking unity among leftist parties.