Weinberg Capital Partners

Company overview

Summa was founded in 2025 following the merger of six independent firms, backed by its majority shareholder, Weinberg Capital Partners. The group is chaired by Christian Vaingnedroye, who initiated the project alongside two partners. Today, Summa brings together 150 professionals based in the Paris region.

Summa’s ambition is to become a leading firm, supporting entrepreneurs from microbusinesses (TPEs) to mid-sized companies (ETIs), with a comprehensive range of financial, tax, labor, and legal services.

Our approach

This investment is fully aligned with the deployment strategy of the LBO fund WCP#4. Indeed, it involves a B2B services company and a primary transaction conducted on a bilateral basis.

Moreover, this operation offers significant opportunities for external growth. Additional firms are already being considered to join Summa, with the aim of expanding the service offering and strengthening the group’s regional presence.