He was also a partner or shareholder in the Åbo sugar mill, the town's two tobacco factories, the Järvenoja paper mill, the Åvik glass factory, the Kuppis brick works, the Koski and Luvia sawmills, the Swedish East India Company, and several smaller businesses, as well as the owner or landlord of various manors, farms, and inns.
At the death of her spouse in 1785, Ulrika Fredrika Bremer inherited her husband's guild membership and the right to manage his business empire in her own right.
Under her management, the Bremer house maintained a dominant place in Finnish business life, and she left a great fortune after her death.
[1] She also had a daughter Agata (Agathe) Bremer (1774—1810), who married two noblemen, first in 1790 to Adolf Ludvig Carleson and then in 1798 to Fabian Wrede af Elimä.
Following her death 1798, her son Carl (the father of writer Fredrika Bremer sold all her businesses and moved to Sweden in 1804.