The ESC Planegg was founded on 6 April 1990 and initially took part in the game operations of the Bavarian state league (German: Landesliga Bayern).

At the newly introduced DEB Cup tournament, the ESC Planegg lost to EC Bergkamener Bären in the penalty shoot-out in the final and were again able to claim second place.

In the DEB Cup, however, the Penguins narrowly lost to OSC 3:4 in the preliminary round and won the match for third place 7–0 against EC Bergkamen.

The team also took part in the Elite Women's Hockey League for the first time, which was held parallel to the Bundesliga, and finished third behind HC Slavia Praha and OSC Berlin.

ESC Planegg finished the 2019–20 Bundesliga regular season in first place and reached the play-off final against ECDC Memmingen after beating the Eisbären Juniors Berlin in the semifinals.

Club president Kevin Wüst explained, "We are… guests at our so-called home games" in addition to citing "ever greater challenges every year," including the dependence on many third parties, the substantial monetary and labor costs related to securing venues and local sponsorships, and difficulty retaining players, volunteers, and fans among the constant changes.