Meridiam is a Paris‑based, privately owned investment firm and asset manager that specialises in developing, financing and managing long‑term public infrastructure. Founded in 2005 by Thierry Déau as a société par actions simplifiée (SAS), it focuses on sustainable infrastructure across Europe, Africa and the Americas, with ten offices including Paris, Luxembourg, Washington, D.C., Istanbul, Dakar, Addis Ababa, Vienna, Amman, Libreville and Johannesburg. The firm manages more than €23 billion in assets and a portfolio of over 125–130 projects, and has invested over €87 billion in essential infrastructure since inception. Meridiam’s activities span transport infrastructure, social and public buildings, utility networks and new energy sources such as solar and hydroelectric power, as well as sustainable small and medium‑sized enterprises through dedicated funds.
Meridiam positions itself as a specialist in three core impact areas: critical public services (including hospitals, schools, nurseries, university accommodation and digital infrastructure), sustainable mobility (roads, rail, ports, airports, tramways and other mass transit) and innovative low‑carbon solutions that support energy access and the energy transition. It raises and manages a family of infrastructure funds in Europe, North America and Africa, along with thematic vehicles such as the Meridiam Infrastructure Africa Fund, The Urban Resilience Fund, Meridiam Transition, Meridiam Sustainable Water and Waste Fund and the Green Impact Growth Fund. The firm integrates environmental, social and governance criteria and impact measurement throughout the investment cycle, underpinned by UN Principles for Responsible Investment, the Equator Principles and development‑bank standards, and uses its proprietary SIMPL. platform to track performance against the UN Sustainable Development Goals.
Meridiam is both a French “mission company” and a certified B Corporation, embedding its mission of delivering sustainable infrastructure that improves quality of life into its by‑laws. Its five strategic pillars emphasise resilient infrastructure and cities, accelerated energy transition, emissions reduction, good working conditions and inclusion, and protection of biodiversity. The firm maintains ISO 9001 and ISO 37001 certifications, an advanced external sustainability rating, and publishes detailed climate, nature‑related and impact reporting, including TCFD and TNFD reports, a climate policy and a human rights policy. It has committed under the Net Zero Asset Managers initiative to reduce Scope 1 and 2 emissions by 50% by 2030 and to achieve carbon neutrality across its organisation and assets by 2050, and pursues gender equality and diversity objectives across its workforce and portfolio.