Unfortunately, there has been more insider selling of Blackstone stock, than buying, in the last three months. And our longer term analysis of insider transactions didn't bring confidence, either. While insiders do own a lot of shares in the company (which is good), our analysis of their transactions doesn't make us feel confident about the company. In addition to knowing about insider transactions going on, it's beneficial to identify the risks facing Blackstone. At Simply Wall St, we've found that Blackstone has 2 warning signs (1 is significant!) that deserve your attention before going any further with your analysis.