Guys, you really need to relax. I cannot find the information right this second, but I believe this is what is called a "paperless trade".
When restricted shares vest, the holder is responsible for the taxes at this time. Let us say that the stock grants were worth $100,000. Upon vesting, they have to pay income tax on what the stock is worth. Most of these people are probably in a pretty high tax bracket. We will use 40%. That means they are liable for $40,000 in taxes.
What happens is that they sell enough of the shares to cover the taxes and trading fees and keep the rest. That means that while they sold 40% of their grants, they are still keeping 60%. It is a very common practice and you will see executives in every single company doing this all the time. It does not mean that they have no confidence in the company. It is simply a prudent financial decision.