"....however I find it quite disturbing....his selling leaves the door WIDE open for interpretation ( and not all good reasons come to mind ) , what real confidence comes with his departing shares ???...."

You should quite before you get any further behind.

There is nothing to suggest anything untoward. Nothing about it is "quite disturbing". Nothing suggests he is "unloading".

Calling him a "disgruntled employee" is defamatory.