deaprting md and shareholder

I always get nervous when people in the know move on.
In recent days there have been 2 incidents to make me double nervous.
1. MD resigns. In the last AGM he was creditted with the great team spirit. Now he's gone, and it didn't sound voluntary the way I read the notice. I wonder what the Chair expects to happen which wasn't happening?
2. Sigma owner who was partly paid in shares is no longer a substantial shareholder.

I think there would be few people who know the market they operate in better and they'r leaving.

As a result, I halved my holding so I can't be more than half wrong!