18. Medidata Solutions
CEO: Tarek Sherif
One of several solution providers on this fastest growing list that is in the healthcare field, Medidata's revenue grew from $86 million in 2008 to $140 million in 2009, placing it at #224 on the 2010 VAR500. The VAR's 63 percent growth comes from providing hosted software for administering and managing clinical trials, electronic data capture applications, study management applications, and patient diaries. Medidata also offers consulting, implementation, integration, maintenance, support, and training.