[1] She managed the major slave trade firm Grou et Michel in Nantes from 1774 to 1793, which at that time was one of the most successful companies of its kind, making her a millionaire.

In 1741 she married the millionaire slave trader Guillaume Grou (1698–1774).

When her father died in 1745, she and her sisters Agnes and Mary inherited the Manoir de la Placelière, which was bought by Anne and her spouse in 1747.

In 1755, her birth family was recognized as nobility by the French crown.

She also inherited his slave trade firm, Grou et Michel, one of the biggest companies in Nantes.