There is described a package grouping apparatus (1, 1', 1") comprising an inlet conveying device (4) configured to advance packages (3) along an advancement path (P) and a grouping system (5) configured to form one or more groups (2) from the packages (3). The grouping system (5) comprises an endless carrier (6), a plurality of independent carts (7) moveably coupled to the endless carrier (6) and each having at least one engagement element (9). Each independent cart (7) comprises a powering unit configured to control movement the respective engagement element (9) between a respective rest position to a respective active position. The powering unit is configured to move the respective engagement element (9) from the respective rest position to the respective active position after formation of the respective group (2) and for discharging the respective group (2) of packages (3) from the inlet conveying device (4). The grouping system (5) also comprises an energy transfer device (10) configured to transfer energy to the powering units of the independent carts (7) and such to provide for the energy needed to control the respective engagement element (9) from the respective rest position to the respective active position.