She immigrated to the United States in 1883, where the family set up a business which grew into kosher food manufacturers Horowitz Brothers and Margareten Company.
While pregnant, she emigrated with her husband Ignatz Margareten and her parents in 1883 to the United States, where they settled in New York City.
They made their own matzoh for their first Passover while in the United States, and this grew over the following years to become the sole object of the family's business in New York, which was known as Horowitz Brothers and Margareten Company.
When the city took over the original business location in 1945, Margareten oversaw the opening of a larger facility in Long Island.
Following the start of the Second World War, she and her son Jacob arranged for many members of the Hungarian side of the family to come to the United States.