Sienna Investment Managers passes the €30bn AuM milestone

Sienna Investment Managers’ strategic acquisitions

With the acquisitions of L’Etoile Properties, and more recently of MH GA and ACOFI Gestion, Sienna Investment Managers now manages €33.7bn and comprises a full suite of asset management expertise across long-term solutions in Private Equity, Private Debt, Real Estate; and long-only through direct investments as well as multi-management, with a focus on ESG investments and on the digital sector. Its investment solutions are principally for institutional investors but also retail clients through third-party retirement and saving plans built with strategic partners.

Sienna Investment Managers branding consolidated

The companies that have joined the group will change their name to reflect being part of Sienna Investment Managers, while specifying their areas of expertise:

  • L’Etoile Properties, which manages €6.6bn (as of December 31, 2021) in real estate assets on behalf of international clients, is renamed Sienna Real Estate.
  • MH GA, which manages €21.4bn (as of December 31, 2021) in long-only assets on behalf of French clients through retirement and employee savings solutions, will be renamed Sienna Gestion.
  • ACOFI Gestion, which manages €2.5bn (as of December 31, 2021) in private debt for European clients, is renamed Sienna Private Credit.
  • The London-based new business unit in charge of investments in the digital sector is renamed Sienna Digital.
  • The historical business unit in charge of private equity is renamed Sienna Private Equity


About Sienna Investment Managers
Sienna Investment Managers, the platform for alternative investments and wholly owned by GBL, operates in seven countries and notably in Luxembourg, London, Paris, Hamburg, Amsterdam, Madrid and Seoul. Sienna Investment Managers employs 230 professionals and manages €33.7 billion (of which €3.2 billion is in permanent capital) on behalf of GBL and international clients, primarily through real estate assets, investments in private market funds and direct equity investments in unlisted companies, especially in the digital sector.

About GBL
Groupe Bruxelles Lambert (“GBL”) is an established investment holding company, with over sixty years of stock exchange listing, a net asset value of €22.5 billion and a market capitalization of €15.3 billion at the end of December 2021. GBL is a leading investor in Europe, focused on long-term value creation and relying on a stable and supportive family shareholder base. GBL is both a responsible company and investor and perceives ESG factors as being inextricably linked to value creation.

GBL strives to maintain a diversified high-quality portfolio of listed and private assets as well as alternative investments (through Sienna Investment Managers, the group’s alternative investment platform), composed of global companies that are leaders in their sector, to which it can contribute to value creation by being an active professional investor.

GBL is focused on delivering meaningful growth by providing attractive returns to its shareholders through a combination of growth in its net asset value, a sustainable dividend and share buybacks.
GBL is listed on the Euronext Brussels stock exchange (Ticker: GBLB BB; ISIN code: BE0003797140) and is included in the BEL20 index.

Press Contacts
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Maitland/AMO (UK): Finlay Donaldson –
Red Robin (DE): Elena Ekkert –