Sales: $17 billion
Investors were watching this underperforming unit very closely before second-quarter earnings alleviated some of their fears. The division, which manufactures medical equipment like X-ray machines, saw profit jump 8% and revenue increase 11% in the second quarter—after a 17% drop in profit the previous quarter. That's a sign the division, which Immelt ran before becoming CEO in 2001, is on much better footing.