In 1992, Marčiulionis opened the Šarūnas Hotel in Vilnius.
In 1993, he founded the Lithuanian Basketball League (LKL), and also became its president.
In 1999, Marčiulionis founded the North European Basketball League (NEBL), and also became its commissioner.
The NEBL would later be absorbed into the Baltic Basketball League.
Today, he is one of the most successful businessmen in Lithuania.
He was also the President of the Šarūnas Marčiulionis Basketball Academy.

On February 14, 2014, Marčiulionis was announced as a 2014 player inductee, by the Naismith Memorial Basketball Hall of Fame; he formally entered the Hall on August 8.
On September 19, 2015, Marčiulionis was inducted into the FIBA Hall of Fame.

On October 2, 2015, it was announced that Šarūnas Hotel was closed.
The nearby Šarūnas Marčiulionis Basketball academy meanwhile, was closed after the 2015–16 season.

On May 26, 2019, Marčiulionis was elected to the European Parliament to serve in the Ninth European Parliament.
However, on May 28, he announced that he decided to give up his seat in the European Parliament.
In 1992, Marčiulionis opened the Šarūnas Hotel in Vilnius. In 1993, he founded the Lithuanian Basketball League (LKL), and also became its president. In 1999, Marčiulionis founded the North European Basketball League (NEBL), and also became its commissioner. The NEBL would later be absorbed into the Baltic Basketball League. Today, he is one of the most successful businessmen in Lithuania. He was also the President of the Šarūnas Marčiulionis Basketball Academy.
On February 14, 2014, Marčiulionis was announced as a 2014 player inductee, by the Naismith Memorial Basketball Hall of Fame; he formally entered the Hall on August 8. On September 19, 2015, Marčiulionis was inducted into the FIBA Hall of Fame.
On October 2, 2015, it was announced that Šarūnas Hotel was closed. The nearby Šarūnas Marčiulionis Basketball academy meanwhile, was closed after the 2015–16 season.
On May 26, 2019, Marčiulionis was elected to the European Parliament to serve in the Ninth European Parliament. However, on May 28, he announced that he decided to give up his seat in the European Parliament.
Šarūnas Marčiulionis