In 1962, the brothers, who were still working together despite their disagreement, decided to name the groups Aldi Nord and Aldi Süd, taken from the first two letters of Albrecht and Diskont. Aldi Nord took over stores in the north of Germany while Aldi Süd became responsible for stores in the south, with the border between the two becoming known as the "Aldi Equator".

In 1966, the two businesses became financially and legally separate. By this time, there were 200 Aldi Süd stores in Germany.