Looking up a value and returning a list

I've been browsing through the forums for an answer to this question but it doesn't seem like there is a clear one.

What I'm trying to do is lookup a value and return list of corresponding data. For example, in column A, I have a "Branch Location" and in column B, I have a person associated to that "Branch Location". There is more than one person per branch.

I'd like to create a summary sheet (probably using some type of INDEX/MATCH/SMALL array) that will list all of the employees for that branch. I've attached a dummy Excel for your reference.

Please help. Thanks!

The PivotTable approach won't work for what I'm trying to do. Is there another approach? I've been playing around with the INDEX, MATCH, SMALL functions but I can't get it to work properly. Any other ideas?