Fortinet

CEO: Ken Xie

Dec. 30, 2016: $30.12

June 30, 2017: $37.44

Change: +24.30%

Security technology vendor Fortinet had a turbulent 2016, undertaking an extensive reorganization of its U.S. enterprise sales operations. But ultimately the company managed solid growth in 2016, reporting in February that revenue for all of 2016 was $1.28 billion, up 26 percent from $1.01 billion in 2015.

That growth has continued in 2017 – and that's reflected in the company's stock price. For the first quarter ended March 31, Fortinet reported revenue of $340.6 million, up 20 percent from $284.6 million in last year's first quarter. Net income surged more than five-fold to $10.7 million from $2.1 million one year before.