Original: BMW sold its part to Peter Sauber again after the end of the 2009 season, but the team still formally uses the name 'BMW Sauber' in Formula One competitions (June 2010).
Simplified: BMW sold its share of BMW Sauber back to Peter Sauber after the end of the 2009 season. Because of their contract with Formula One, the team still formally uses the name 'BMW Sauber' in competitions for.