Summa, an accounting firm group backed by Weinberg Capital Partners’ WCP#4 LBO fund, announces the integration of new firms, with three new acquisitions and three exclusive deals underway. Driven by an ambitious buy-and-build strategy, Summa is thereby strengthening its presence in Île-de-France and expanding into a new region: Provence-Alpes-Côte d’Azur. This strategy is backed by unitranche debt, supplemented by equity from Weinberg Capital Partners, giving Summa the resources to continue its development.
In 2025, Weinberg Capital Partners announced its support for the structuring of a new player in the accounting, audit and advisory market. Chaired by Christian Vaingnedroye, Summa was created through the coming together of several independent firms.
With the arrival of these new teams, Summa now brings together 8 independent firms and 17 partners. The group is thereby consolidating its presence in Île-de-France and making its first move into the Provence-Alpes-Côte d’Azur region.
Summa intends to continue this growth momentum by integrating new players in other regions.
This consolidation model directly addresses the profession’s major current challenges: succession, recruitment and accelerating digital transformation. By joining Summa, accounting firms pool their investments and broaden their expertise, while retaining full autonomy in managing their clients and teams.
New external growth operations, financed by unitranche debt provided by Pictet and equity from Weinberg Capital Partners, will be announced in the coming months, enabling Summa to reach €30 million in consolidated revenue.
Founded in 2005, Weinberg Capital Partners is an independent investment firm historically active in ownership-transition (LBO) transactions. Its scope expanded into real estate assets in 2008. In 2020, Weinberg Capital Partners broadened its capabilities in support of SMEs and mid-sized companies with a minority-stake strategy focused on sustainable development, offering extra-financial, impact-oriented support designed to prepare companies for environmental and societal challenges. In 2023, Weinberg Capital Partners launched a new fund, WCP Eiréné, dedicated to supporting SMEs and mid-sized companies in the security and defense sector. In 2024, the firm continued its expansion in private equity with the launch of a co-investment fund, WCP Co-Invest. In 2026, Weinberg Capital Partners announced the creation of its Private Wealth business dedicated to private clients, as well as the launch of a new fund, WCP Eiréné Development.
With €1.5 billion in assets under management, Weinberg Capital Partners is a long-standing and recognized player in the French mid-market equity segment.
Weinberg Capital Partners is a signatory of the Principles for Responsible Investment (PRI), a member of the International Climate Initiative (iCI), and is committed to an active responsible-investor approach.
Weinberg Capital Partners supports Télémaque, an association promoting equal opportunity in education.
To learn more: weinbergcapital.com.
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Bérengère Beaujean
Head of Communications
berengere.beaujean@weinbergcapital.com
+ 33 7 85 58 29 73
Frédérique Josse
Communications Manager
frederique@summa-expertises.fr
+ 33 6 10 93 60 72
Alain Biquard
Development and Investor Relations Manager
alain.biquard@weinbergcapital.com
+ 33 7 86 36 90 79
Alix de Solms
Head of Private Wealth
alix.desolms@weinbergcapital.com
+ 33 6 72 66 85 41
