Sienna Investment Managers (formerly Sienna Capital) is a pan-European multi-asset manager and the alternative investment platform of Groupe Bruxelles Lambert (GBL). It invests across private equity, private credit, real estate, and listed assets, focusing on sustainable finance, biodiversity, and European defense.
33% of their portfolio is in Social & Community. They made 1 investments in the last 12 months. Their most common stage is series-c (50% of deals). Average disclosed round size is $49.8M (across 6 rounds with reported amounts).
Portfolio
5
Fund Size
—
Top Stage
Series C
Last 12 Mo
0
Team
Béatrice de Meaux-Becdelièvre
Deputy Managing Director, Private Credit
Fabrice Rossary
Managing Director, Private Credit - President of Sienna AM France
Jean-Baptiste Lagier
Director of Marketing, Strategy & Transformation
Véronique de Kersaint-Gilly
Human Ressources Director
Cécile Haaser
Head of Finance, IT & Operations
Thierry Vallière
Executive Board
Henry Timmis
Co-Managing Director
Olivier Veeneman
Managing Director Benelux
Jeong Ho Lee
Investment Manager
Samy Bchir
Chief Investment Officer
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
Portfolio
| Company | Round | Amount | Date |
|---|---|---|---|
 Seemplicity | Series B | $50M | Aug 2025 |
 DustPhotonics | Series B | $24M | Feb 2024 |
 IBEX | Series C | $55M | Sep 2023 |
 Hourly | Series A | $32M | Nov 2022 |
 Pollen | Series C | $60M | Oct 2020 |
| Pollen | Series C | $77.5M | Oct 2019 |
Top Co-Investors
Last updated: 8 September 2026