All insider sell is pre planned. You have to remember with the run this stock has had, these bigwigs are sitting on millions of dollars. This becomes too large a % of their net worth and thus they need to sell.
It doesn't matter what the companies future looks like at the moment. When you hold too much of any asset, money managers will sell to get things back into balance. They do this in case we get a market crash or something unexpected like that. Investing 101