In North America, the X series and dual motor uprights originally used Ametek Lamb suction motors, but the current models use suction motors made by Domel in Slovenia. Brush motors used to be made by AEG, but are now manufactured by Ametek Italia. I believe they switched their suction motors when Ametek moved their Lamb plant from Kent, Ohio to Reynosa, Mexico.
The Felix's, as Emmanuel mentioned, originally used both Ametek Italia suction and brush motors. I have not seen the current Felix suction motor, but if stamped B/S/H, they are sourced from Bosch Siemens Hausgeräte.