Information from publicly accessible sources are used to calculate the daily weighted average, including results from the following institutes:

Emnid (for Bild am Sonntag)
Forsa (for stern and RTL)
Forschungsgruppe Wahlen (for ZDF-Politbarometer)
GMS Dr. Jung GmbH
Ipsos GmbH
Infratest dimap (for ARD-DeutschlandTrend)
Institut für Demoskopie Allensbach (for Frankfurter Allgemeine Zeitung)
TNS Forschung (for Der Spiegel)
INSA/YouGov (for BILD)
YouGov (for RedaktionsNetzwerk Deutschland)