Fortinet, Inc. shares fall 18.62% in premarket after conservative revenue guidance for Q3.

Fortinet, Inc. plunged 18.62% in premarket trading after the company released its third-quarter revenue outlook, forecasting a range of $1.67 billion to $1.73 billion, with the midpoint below market expectations of $1.71 billion. The conservative guidance raised investor concerns about slowing growth momentum, despite the second-quarter results exceeding expectations.