CEO Secrets: The secret is out...

Since August 2015 the BBC Business Unit has been conducting a social media experiment called CEO Secrets.

We wanted to find out what makes prominent chief executives tick. What is the secret to their success?

Shhh! Get all the #CEOSecrets on our website here.

To keep up to date with CEO Secrets and go behind the scenes follow series producer Dougal Shaw on Twitter and Facebook.