Karl Albrecht Aldi Süd and took the position of chairman of the board until 2002. At the beginning of 2002, he also relinquished this position, thereby completely ceding control of the firm. Today, the business is no longer run by any of Karl Albrecht's family members. Karl Albrecht was a very reclusive man who had not taken part in public life for several years prior to his death. As a result, little is known about him. "Forbes" magazine reported that he had two children, neither of whom was employed by Aldi. He reportedly lived in Essen, as did his brother Theo until
Perekrestok (supermarket chain) connected. In November 2017, X5 introduced machine learning to bolster targeted marketing at the Perekrestok supermarket chain, and developed personalised offers for all members of the Perekrestok Club loyalty program. The company leverages machine learning to group customers into segments based on common features and create offers for them. The system analyses groups of customers and designs personalised marketing campaigns based on demographic and several hundred behavioural factors, such as: frequency of purchases and ticket size, customer preferences, lifestyle fundamentals, acceptable price levels, favourite product categories and preferred shopping hours. Customer sensitivity to offers is predicted using various analytical models.