About us


The family spirit :

/sonamia-nouveau-siege
The family saga started in 1962 by Roger MONVOISIN. Over the years, he handed over the baton to his children, Thierry, Patrick, Véronique and Dominique, and little children, Erwann, Corentin, Olivier. Together they have created a strong group KERPRO present in three business areas, wholesalers, industrials with MONROC and retailers with SOFRAP group (Point S). The family is surrounded by strong teammates, constantly involved in the development of the group both on national and international levels.

Entrepreneurial Spirit :


Our head office is in France, near Nantes; in August 2014 we moved to Saint Hilaire de Loulay (Vendée). With more than 36000m2 of storage area, a logistic team is responsible to streamline, facilitate, accelerate the flow of the goods and the domestic and international trade : computerized stock management, addressing, semi-automated assembly, a customized operating software ERP, Intranet and Extranet communications, Customs bonded storage...

The spirit of innovation :

Standard and customised wheels, tires of all kinds of profiles for agriculture, industry, handling, passenger cars... from the wheelbarrow to Public Works vehicles, original equipment (OE) or replacement, unbraked or braked MONROC axles (approved CEMAGREF, UTAC, EEC and TUV), chassis equipment (hitchs, crutches, jacks...). SONAMIA team members travel around France and all over the world, looking for innovation to respond to your requirements.

The spirit of conquest :

Present almost everywhere, SONAMIA has regular routes to France, Europe, Africa, Australia, overseas territories, and does it best to deliver its customers safely and on time.

Summary :

Family business (MONVOISIN family)
• Established in 1962
• Turnover: 53 millions € 2014
• 35% of its turnover with export activities
• 60 employees
• CEO: Dominique MONVOISIN
• The Company belongs to Kerpro Group, with a turnover of 95 millions in 2014