It is good to see the recent insider purchase. But we can't say the same for the transactions over the last 12 months. While recent transactions indicate confidence in Insulet, insiders don't own enough of the company to overcome our cautiousness about the longer term transactions. Overall they seem reasonably aligned. 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. When we did our research, we found 3 warning signs for Insulet (1 is significant!) that we believe deserve your full attention.