In the past few months a lot of people (mostly BAs, Account Managers and people in management) have left the company I work for. While this is pretty normal for developers I don't know about management.
There are no bad news or rumors, "everything is going great" and we have "a lot of new jobs coming in". Also the company keep hiring new people (an average of 2/week).
However I've had experience in the past of "everything going great" and the company suddenly announcing shutting down.