International law firm Simmons & Simmons has successfully advised Adagia Partners - a European mid-market private equity firm specialising in healthcare, business services and technology - on its acquisition of agn Niederberghaus & Partner GmbH (AGN).
AGN is a leading German general planning firm with over 70 years of experience in delivering innovative and sustainable architectural solutions, with a focus on the public sector (with over 1,000 public projects). AGN employs over 850 people across 16 locations in Germany. Headquartered in Ibbenbüren, North Rhine-Westphalia, AGN specialises in architecture, general planning, construction engineering, project management, and technical building equipment across various specific building types (including schools, hospitals, special-use buildings such as fire stations).
With a view to the market potential - driven by digital transformation, sustainability initiatives, and government infrastructure investments - Adagia Partners and the management team aim to strengthen further and expand AGN's leading position in the German market. With Adagia Partners' support, AGN is committed to playing an active role in consolidating the highly fragmented market.
AGN has been sold by Armira, the Niederberghaus family, and members of the management team, who will remain co-invested in AGN. Closing of the transaction is expected in Q3 2025.
The Simmons team was co-led by Dr Christian Bornhorst (Private Equity, Head of Corporate and M&A in Germany) and Michael Surmann (Private Equity). Commenting on the transaction, Christian Bornhorst said: "We are delighted to have advised Adagia Partners on this strategic acquisition, establishing a promising platform for sustainable future development and, ultimately, also in furtherance of the modernisation of public infrastructure in Germany. This transaction highlights our commitment to supporting clients in achieving their growth ambitions through strategic deals and our ability to facilitate transactions in the infrastructure, E&C, and professional services sectors."

