AEK B.C.

AEK Basketball Club (Greek: ΚΑΕ ΑΕΚ Greek pronunciation: [ˈaek]; Αθλητική Ένωσις Κωνσταντινουπόλεως Athlitikí Énosis Konstantinoupóleos, "Athletic Union of Constantinople"), officially AEK Betsson BC for sponsorship reasons, and also known as AEK B.C. or AEK, or more commonly known in European competitions as AEK Athens, is a Greek professional basketball club based in Athens, Attica, Greece, part of the major multi-sport club AEK. The club was established in Athens in 1924 by Greek refugees from Constantinople in the wake of the Greco-Turkish War (1919–1922).

AEK B.C. is considered as one of the three best Greek teams in all sports, at either the sports club or national team level, in 1965, 1966, and 1968, by SJA of Greece (the Sports Journalists' Association of Greece, Greek: ΠΣΑΤ). AEK was the first-ever Greek basketball team, not only to reach a European Cup Final, but also to win a European title. On 4 April 1968, AEK defeated Slavia VŠ Praha by a score of 89–82, in Athens in front of 80,000 fans. They have won the Greek League 8 times (1957–58, 1962–63, 1963–64, 1964–65, 1965–66, 1967–68, 1969–70, 2001–02), and the Greek Cup 5 times (1980–81, 1999–00, 2000–01, 2017–18, 2019–20), while they have also twice won the FIBA Saporta Cup (former European Cup Winners' Cup) (1967–68 and 1999–00). AEK won the Champions League on 6 May 2018, defeating Monaco by a score of 100–94, and the FIBA Intercontinental Cup on 17 February 2019, defeating Flamengo by a score of 86–70.

The team's main sponsor, since 2020, and its naming sponsor since 2023, is the multinational online casino company Betsson.