Ottilie Grabner registered her antiques and art business in November 1929 at her home address on Linke Wienzeile in Vienna's 6th district. In 1939 she opened a dealership at Spiegelgasse 25 in the 1st district. Little is known about her business affairs. Between 1938 and 1945 she sold works of art to the Albertina and the Städtische Sammlungen Wien. She retained her trade licence until her death in November 1950 and also had shares in the antiques business. The trade licence became invalid with her death.