Thanks to their very popular mobile services and superior data and targeting abilities, Google and Facebook continue grabbing online ad share.
While Facebook's mobile exposure limits the damage ad-blockers can do it, many web publishers and ad tech firms are in a tougher position.
Stocks with insider trader activity include TRMR, CCG and JBL
Stocks with insider trader activity include WTI, TRMR and HES
Advertising-tech stocks remain in the gutter, one big reason the start-up MediaMath has chosen to stay private -- at least for now.