How to list all nodes referencing a node in a tree view
I have achieved this with Views and Views Field View.


I have added a View, showing Content of type Company and created a
Block with display format HTML List of fields.
Added a relationship Entity Reference: Referenced Entity Content entity referenced from field_reference_company
Added a contextual filter Content: Nid with the relationship
I've just added.
Provided a default value Content ID from URL to the contextual
filter.
Added the fields:

Content: Nid, excluded it from display.
Content: Title
Global: View and selected the view itself with Master Display, set as Contextual filters: [!nid]



That's it.