The club competes in the top tier BNXT League and plays its home games in the Okapi Forum, which has a seating capacity of 2,800 people.

Okapi was founded on 15 November 1949 by a group of friends in Aalst, almost all going to the school named Aalsterse Atheneum.

[1] In the 1969–70 season, Okapi won the national second division title in an impressive way by going unbeaten in all 44 games.

In the following seasons, Okapi enjoyed the first league in which local Derbys against Black Boys Aalst were played.

[1] In the 2011–12 season, Aalstar won its first trophy ever with its Belgian Basketball Cup victory.

[2] By winning the Cup, Okapi qualified for the Belgian Supercup the next season, which it also won after defeating BC Oostende.