She is one of the two children of Karl Albrecht, who founded the discount supermarket chain Aldi with his brother Theo.
[2] Together with her brother Karl Albrecht Jr., as of 2020, she had a net worth of US$41.3 billion, putting them at the top of Forbes list of the richest Germans.
[2][6] She is married to entrepreneur Peter Heister, who is related to the Werhahn family and was the former head of Aldi South.
[6] Heister controls half of Aldi South, which operates more than 6,000 stores in southern Germany, the US, Austria, Italy, Switzerland and many other countries.
[2] As of 2021, Heister remained active as a board member of the Siepmann Foundation, which takes its name from the maiden name of her paternal grandmother.