Original: Having not won a Grand Prix as an independent, the team was sold to BMW in 2005, and competed as BMW Sauber from 2006 to 2009, scoring one victory. At the end of the 2009 season, however, BMW pulled out of Formula One and the team's future remained uncertain for several months, until it was sold back to Peter Sauber and granted a 2010 entry.
Simplified: BMW sold its share of BMW Sauber back to Peter Sauber after the end of the 2009 season.