Insiders sold ASGN shares recently, but they didn't buy any. And there weren't any purchases to give us comfort, over the last year. But it is good to see that ASGN is growing earnings. The company boasts high insider ownership, but we're a little hesitant, given the history of share sales. While we like knowing what's going on with the insider's ownership and transactions, we make sure to also consider what risks are facing a stock before making any investment decision. Case in point: We've spotted 2 warning signs for ASGN you should be aware of.