The 2009 Inc. 500: Top 10 Companies by Gross Revenue

Diplomat Special Pharmacy, healthcare
8 of 10

Revenue: $270.7 million
Three-year growth: 917.2 percent
Location: Swartz Creek, Michigan

Founded in 1973, this company fills prescriptions for patients with acute and chronic conditions and operates disease-specific management programs. Phil Hagerman (above) serves as president and CEO.