Holstein Kiel, a privately owned German sports club founded in 1900 and headquartered in Kiel, primarily focuses on association football. With approximately 100 employees in 2023, the club achieved significant success in northern German football during its early years, including a German football championship in 1912 and several regional titles. After competing in first-division football until the Bundesliga's establishment in 1963, the club recently earned promotion to the Bundesliga for the 2024-25 season following its 2024 performance in the 2. Bundesliga.