History:Founded: 1957
In 1999 Excelsior merged with AERA Castor and renamed itself AERA Excelsior Brussel VZW
League achievements:
Belgian Cup Winner -1984, 88, 95Belgian League Finalist -1986, 17 Belgian League Semifinals -1984, 90, 16, 19 Belgian League Regular Season Runner-Up -1986, 17 Belgian Supercup Finalist -1988 Belgian Cup Finalist -1989 Belgian Supercup Winner -1995 Belgian D2 Semifinals -2012 Belgian D3 (Group B) Runner-Up -2009
European cups:
2016-2017:  FIBA Europe Cup: took 4th (last) place (1-5) in Group A of Stage One2017-2018: FIBA Europe Cup: took 3rd place (2-4) in Group D of Stage One2019-2020: FIBA Europe Cup: took 4th (last) place (2-4) in Group E of Stage One2021-2022:  BNXT League: took 9th place (2-16) in Group Belgioum of Domestic Stage2022-2023: BNXT League: took 10th (last) place (4-14) in Group Belgium of Domestic Stage, took 6th place (5-5) in Group Elite Silver of Stage Two2023-2024: BNXT League: took 6th place (10-10) in Group Belgium of Domestic Stage, took 5th place (7-5) in Group Elite Silver of Stage Two |
| Since 2023 |
 2022-2023 |
 2020-2022 |
 2008-2020 |
 2007-2008 |
 Until 2007 |
League positions:
| Season | Tier | Division | W-L | Position + PlayOff | Cup | European competitions |
|---|---|---|---|---|---|---|
| 1983-84 | 1 | Division I | 14-10 | 4th  lost in Semis 0-2 to Oostende | Winner | |
| 1984-85 | 1 | Division I | 12-14 | 10th | ||
| 1985-86? | 1 | Division I | 19-7 | 2nd  lost in Finals 1-3 to Oostende | ||
| 1986-87? | 1 | Division I | 19-7 | 5th | ||
| 1987-88? | 1 | Division I | 15-9 | 5th | Winner | |
| 1988-89? | 1 | Division I | 16-10 | 6th | Finalist | |
| 1989-90? | 1 | Division I | 17-9 | 4th lost in Semis 0-2 to Mechelen | ||
| 1990-91? | 1 | Division I | 8-16 | 11th | ||
| 1991-92 | 1 | Division I | 11-15 | 8th | ||
| 1992-93 | 1 | Division I | 10-16 | 10th | ||
| 1993-94 | 1 | Division I | 11-15 | 11th | ||
| 1994-95 | 1 | Division I | 17-9 | 5th | Winner | |
| 1995-96? | 1 | Division I | 11-15 | 11th | ||
| 1996-97? | 1 | Division I | 9-17 | 10th | ||
| 1997-98 | 1 | Division I | 11-15 | 8th | ||
| 1998-99 | 1 | Division I | 8-18 | 12th | ||
| 1999-00 | 1 | Division I | 9-17 | 12th | ||
| 2000-01 | 1 | Division I | 6-20 | 14th  | ||
| 2001-04 | 2 | Division II | 2nd  | |||
| 2004-05? | 2 | Division II | 2nd | |||
| 2005-06 | 1 | Division I | 8-24 | 9th | ||
| 2006-07 | 1 | Division I | 11-25 | 9th | ||
| 2007-08? | 1 | Ethias | 3rd | |||
| 2008-09 | 1 | Division I | 2nd | |||
| 2009-10 | 1 | Division I | 4th | |||
| 2010-11 | 1 | Division I | 5th | |||
| 2011-12 | 1 | Ethias | 5th | |||
| 2012-13? | 1 | Ethias | 10th | |||
| 2013-14 | 1 | Ethias | 8-28 | 8th | ||
| 2014-15 | 1 | Scooore | 8-12 | 9th | ||
| 2015-16 | 1 | Scooore | 10-10 | 7th, lost in Semis 2-3 to Okapi Aalst | ||
| 2016-17 | 1 | Euromillions | 22-14 | 3rd lost in Finals 1-3 to Oostende |  FIBA Europe Cup: 4th (Group A) (1-5) | |
| 2017-18 | 1 | Euromillions | 13-23 | 8th, lost in Q-Finals 0-2 to Oostende | FIBA Europe Cup: 3rd (Group D) (2-4) | |
| 2018-19 | 1 | Euromillions | 20-15 | 4th, lost in Semis 0-2 to Telenet Giants | ||
| 2019-20? | 1 | Euromillions | 6-11 | 9th | FIBA Europe Cup: 4th (Group E) (2-4) | |
| 2020-21 | 1 | Euromillions | 4-22 | 10th | ||
| 2021-22? | 1 | PBL | 4th |  BNXT League: 9th (Group Belgium) (2-16) | ||
| 2022-23? | 1 | PBL | 10th | BNXT League: 10th (Group Belgium) (4-14) | ||
| 2023-25 | 1 | PBL | 6th | BNXT League: 6th (Group B) (10-10) | ||
| 2025-26 | 1 | European North Basketball |  European North Basketball League: 17th (3-5) |
