[2] During her marriage she assisted her husband, who became a successful businessman and was contracted regularly by Hope & Co. to conduct transactions on the Amsterdam exchange.
[2] When he suddenly died in 1814 Johanna decided to continue his business under the name Wed. W. Borksi, together with her husband's assistant Johannes Bernardus Stoop.
Her company continued until 1884 when the name changed to Van Loon & Co.[2] On her estate in Overveen, Borski received notable guests such as Napoleon and his empress Marie Louise.
In 2022 the Dutch newspaper the Volkskrant published an article about a study[4] about the involvement of De Nederlandse Bank in slavery.
[1] The article suggested that Borski had become rich through her involvement in slavery, citing that her capital: had also been created by the revenues of some Surinam plantations with 565 slaves.