Delivering innovative solutions with purpose

Sienna Investment Managers aims to challenge the status quo by developing innovative investment solutions designed to have a positive impact on the major social and environmental challenges we face.

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With over €40 billion under management (as of end 2024), Sienna Investment Managers provides support to companies and individuals that want to see a sustainable and inclusive economy.

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About us

Sienna Investment Managers is a multiple-expertise pan-European asset manager of the publicly traded investment holding company GBL (Groupe Bruxelles Lambert), with offices in Paris, Milan, Hamburg, Frankfurt, Luxembourg, London, Madrid, Amsterdam, and Seoul.

Spanning listed and private assets, Sienna IM builds bespoke and innovative solutions for its clients, with purpose.

Sustainability

ESG

Sienna’s DNA is to act with purpose to protect the future. Hence, we are fully involved in the development of our communities both at the corporate and at our stakeholder levels : our investee companies, our clients, the territories where we invest, and our teams.

Sienna’s role is to directly finance the economy with a medium to long-term vision, therefore, we are committed with the companies we invest in . To do so, we have developed an ambitious CSR strategy directed both at Sienna and at our investee companies. As such, we systematically focus on climate, biodiversity and DE&I challenges and make our best to implement real-life solutions.

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