Lenco Marine

Location: Stuart, Fla.
Total Growth: 446%
2003 Revenue: $5.7 million
Employees: 34

Along with trolling motors and hatch lifts, Lenco Marine makes trim tabs, which help power boats cut through water. Customers include boat manufacturers like Boston Whaler and stores like Boaters World. Partners Richard DeVito and Sam Mullinax attribute the growth to technical innovation and customer service.