The club competes in the BNXT League and its home arena is MartiniPlaza, which has a seating capacity of 4,350 people.

Founded in 1951, Donar is one of the traditional first division clubs along with Den Bosch, as it entered the league 55 years ago.

The club has the most basketball fans in the Netherlands, with approximately 1,700 season ticket holders and sells the MartiniPlaza out on a regular basis in the playoffs.

In the 2009–10 season, Donar won the 3rd national championship in club history by beating West-Brabant Giants 4–1 in the Finals.

[4] In the regular season Donar ended on the second place, while Jason Dourisseau was named the Dutch League MVP.

In the cup competition, Flames was defeated in the quarterfinals and in the DBL semifinals it lost to EiffelTowers Den Bosch.

[10] Flames acquired Dutch top players Arvin Slagter and Ross Bekkering from defending champion ZZ Leiden and three new Americans were added to the team.

[12] In the 2014 offseason, the club announced that in the previous season, a deficit of €135,000 had arisen after mistakes made regarding the budget.

In the 2015 offseason, Ivica Skelin left the club and was replaced by Erik Braal who would go on to become the most successful coach in Donar history.

In the 2017–18 season, Donar qualified for the FIBA Europe Cup after being defeated in an overtime thriller against Estudiantes in the third and last qualification round of the Basketball Champions League.

As a result of the loss Donar was drafted into a Europe Cup group with KK Bosna (Bosnia and Herzegovina), Le Portel (France) and Antwerp Giants (Belgium) in which they finished 2nd.

In the play-offs, Donar beat Cluj-Napoca in the round of 16 and Mornar Bar in the quarter-finals, to reach its first ever European semi-finals.

In the semi-finals, Donar lost to the defending Italian champion Reyer Venezia, despite winning the second leg at home.

Donar won its third consecutive DBL title on 29 May 2018, after defeating ZZ Leiden 4–0 in the finals.

After a disappointing start of the 2022–23 season, head coach Otten was fired and replaced by his assistant Andrej Štimac on 31 October.

[21] Following the end of the season, in June 2023, the board of Donar came out with a statement that revealed the club was facing serious financial difficulties.

[22] After a month of efforts to keep the club alive, the board had to file for bankruptcy due to a high demand from the tax authorities.

Donar Groningen BV bought the contracts and the BNXT license from the trustee in order to realize the restart while keeping the club at the highest level of Dutch basketball.

On the August 28, 2023, the new management announced that Donar Groningen BV was allowed to use the same license and play in the BNXT League in the 2023–24 season under a few conditions.

[24] Donar began the 2023–24 season with coach Štimac and a reduced player budget, and was eliminated in the semifinals once again.

[29] The MartiniPlaza has a stand named after the club's legendary players Jason Dourisseau (since 2014)[30] as well as after Thomas Koenis (since 2022).

To appear in this section a player must have either: Total titles: 16 Donar has played in Europe since the 1974–75 season, when it made its debut in the 1974–75.

The best performance of the team was reaching the semi-finals of the 2017–18 FIBA Europe Cup, losing to Italian champions and later winners Reyer Venezia.

DBL Coach of the Year The current supporters club was founded on August 26, 1997, under the name Vikings, a nod to the Norse god Donar (Thor).