Rosental Mitte became the headquarters of Geigy in 1858. Initially, dyes were produced at the site, followed by insecticides, fungicides and seed treatments. Production was relocated in the 1960s. Since then, Rosental Mitte has been used for research, offices and administrative purposes. In 2007, Syngenta – the owner at the time – sold Rosental Mitte to a private investor based in Gibraltar. The canton was able to acquire Rosental Mitte in stages, in 2016 and 2019.
Syngenta’s headquarters are to remain in Rosental Mitte long-term. The other buildings on the Rosental Mitte site continue to be rented out to various companies and educational institutions.