J.F. Müller & Sohn AG is an investment holding and family office based in Hamburg, Germany. The firm was founded in 1795 and operates as a long-term participations vehicle that invests across "Old Economy" industrial assets as well as digital businesses, taking direct equity stakes through its holding structure. Its legal seat and registration are in Hamburg (HRB 2346) with a listed address on Klopstockstrasse, and company leadership includes Raetke Müller (Vorsitzender) and Raphael Söhngen (Vorstand). Public records show the group has participated in growth/private transactions (a tracked Series A in Kiwi, March 2015) and completed an exit from Drooms in June 2026; corporate listings also connect the group to port/terminal interests within the EUROGATE/Eurokai scope. The firm’s activity profile aligns with direct-equity, holding-company participations rather than a publicly marketed pooled fund vehicle. A multi-century family ownership, Hamburg base, and a mix of industrial and digital investments make J.F. Müller & Sohn a potential long-horizon, strategic partner for sponsors seeking a European industrial-capable investor.