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Marie-Christine Coisne-Roquette is the head of a little-known family group, Sonepar, a world leader in the distribution of electrical equipment to professionals. Portrait.

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Reading time: 12 min
Ct is a long, mysterious procession, which parades along the narrow sidewalk of this pretty street in historic Paris. There are nearly 200 of them, coming from all over France. A large contingent of Parisians but especially Northerners disembarked at dawn from the TGV from Lille. They have an appointment this April 15, at 9 a.m., for a special meeting. Equipped with their strictly personal invitation, they pass through a porte cochere and enter a discreet conference venue, wedged between the Institut de France and the remains of the ramparts of the watchtower of King Philippe Auguste, a few meters from the Seine.
The participants, in sneakers or in a suit and tie, leather briefcase or backpack, are of all ages and work in all kinds of professions, from schoolteachers to architects and…