You can look at it from another angle also.
The stock was given to the employees as an incentive to do well for the company. Work hard to make the company grow and reap the benefits later.
The issuance of those preferred shares does not mean they are all going to sell them at once, at the same time, and make the SP crash.
Anyway, it is not a concern until the 1 year hold period expires.
Until then, let's wait and see what near term catalysts are to be revealed.