That was really nothing. If they think that acquiring companies is like tradfing baseball cards then they don't understand how hard it is to be "taken over" and the acquiring company has issues with employee retention as well. I wouldn't doubt that the stock was either employee bonus/sign-on's or it was to the owners of the companies we're getting.
..... too bad for the people selling. You just gave away your money but you do what you gotta do.