How to see who shared my post on facebook business page

This is based on their personal privacy setting, eg, if the post is shared by someone your not friends with on Facebook, and their privacy is set to friends only, then you might not be able to see their name. Thanks!

Go to the page of the person or organization that published that post, and then click on the button indicating the number of shares. A list will pop up with the names of the people who shared that post.