Inger Marie Plum (1889–1965) was a pioneering Danish businesswoman. She is remembered for assisting her older brother, Paul Munk Plum, in running his branch of the family's butter export business, P.M. Plum Export-Kompagni. When he died in 1934, she took the firm over at a time when it was unusual for women to run industrial companies. After the Second World War, she successfully headed the firm's extension into canning, including tinned meats. Shortly before her retirement in 1961, she arranged for the company to become a subsidiary of the canning firm Hafnia.[1][2][3]