Don't know why you are getting downvoted and people are getting emotional.

I have family members who work in compliance. Everything is fair game for surveillance. I know of someone who got fired for accidentally uploading his whatsapp chat history via work email (this is how chat history backup used to work) and they got fired from JPMorgan for having references to drugs.

You can choose not to work for companies like this (indeed I have always fully owned my machine at work) but you're just kidding yourself if you think bigco aren't monitoring everything you do.