Private Equity FundPuts its own capital into companiesLAST VERIFIED Oct 2026 · 13 SOURCES

Flexstone Partners

Private-markets affiliate of Natixis Investment Managers (Groupe BPCE)

Also known as Flexstone Partners SAS

Private-markets manager affiliated with Natixis IM, with a Paris management company: fund-of-funds, secondaries and small/mid-market co-investments; over $15bn AUM and advisory (Sept 2026).

HEADQUARTERS: Paris, France
FOUNDED: —
AUM: $15B (2026)
OUTSIDE CAPITAL: Yes
TEAM LISTED: 8 people

Focus

STAGES: Buyout
SECTORS: —
ASSET MIX: Funds (as LP)Private equityPrivate creditReal estate
GEOGRAPHY: GlobalNorth AmericaEuropeAsia-Pacific

Overview

Flexstone Partners is a private-markets investment manager and affiliate of Natixis Investment Managers, with teams in New York, Boston, Paris, Geneva and Singapore. It invests for institutional and private clients through primary fund commitments, secondaries and co-investments in small and mid-market private equity, and also offers private debt, infrastructure and US real-estate programmes via fund-of-funds, funds-of-one, separately managed accounts and co-investment funds. It has invested in funds since 2005 and reports over $15bn of assets under management and advisory as of September 2026, after closing the acquisition of Boston secondaries manager Glouston Capital Partners on 1 September 2026.

PORTFOLIO (5)

PolyplusNOTABLE
Biotech & Life Sciences · since 2020
AeroSafe
HealthTech
Thayer Power & Communication
Industrial & Manufacturing · since 2020
Pastas Gallo
Food & Agriculture · since 2020
Stable Group
Consumer & E-commerce · since 2020

People

Eric Deram
CEO (Geneva) · source
David Arcauz
Co-CIO (Geneva) · source
Nitin Gupta
Co-CIO (New York) · source
Hans DeWitte
Global COO & CFO (New York) · source
Benoit de Kerleau
Global Head of Strategy, Business Development & Special Projects (Paris) · source
Benoit Jacquin
Head of Investor Relations (New York) · source
Rudy Chappe
Managing Director, Primary and Co-Investment (Paris) · source
Anatoli Gavrilov
Managing Director, Primary and Co-Investment (New York) · source

Frequently asked questions

Flexstone Partners is a private equity fund based in Paris, France.

Yes. Flexstone Partners invests its own capital in private companies. It also commits capital to third-party funds as an LP.

Flexstone Partners invests at Buyout stage.

Key people at Flexstone Partners include Eric Deram (CEO (Geneva)), David Arcauz (Co-CIO (Geneva)), Nitin Gupta (Co-CIO (New York)) and Hans DeWitte (Global COO & CFO (New York)).

Flexstone Partners's investments include Polyplus, AeroSafe, Thayer Power & Communication, Pastas Gallo and Stable Group.

Yes. Flexstone Partners manages capital from outside investors.