Panathinaikos Water Polo Club

[1] Panathinaikos AC Water Polo was initially established in 1930, but three years later it was forced to close because of the lack of a swimming pool.

In its first participation in the LEN Euroleague (2011–12), Panathinaikos succeeded in advancing from the preliminary round to the first group stage.

The club succeeded in winning against Kharkiv and VK Primorac Kotor (8-11) but it was eventually eliminated from the second group stage.

Following its elimination from the Euroleague, PAO went on to compete in the LEN Trophy, where it advanced until the round of "16" after winning against Le Ben and eventually having a draw 7-7 against Galatasaray.

[2] Finally Panathinaikos did not advance to the quarter-finals after being eliminated by Panionios 6-8 in OAKA, and 13-14 (10-12) in Nea Smirni.