More than 82 million FireEye shares can be traded for the first time on Wednesday without restrictions put in place after the company's secondary stock offering earlier this year.
The stock was up 9.78% to $31.76 at 12:21 p.m.
Charts call a breakdown once they report earnings after the close Tuesday.
Soon enough, we'll know where the demand lies.
Hackers distributed a zip file containing about 370 megabytes of jeopardized personal and professional data related to a cyber security researcher working for FireEye's cyber forensic consulting unit, Mandiant.
Mondelez could see a big hit in sales.