Insiders are allowed to trade the stock of the company they work for. They just can't make a trade which is motivated by non-public insider knowledge. For examp

Insiders are allowed to trade the stock of the company they work for. They just can't make a trade which is motivated by non-public insider knowledge. For example, if the company was going to have another bad quarter the insiders can't dump their stock in advance of the public release date. Most of the time, insiders will have a schedule set up and announced well ahead of time for when they want to sell stock, to avoid being accused of selling in reaction to some negative event for the company.