In the scenario where an exhibitor/seller company wants to display a widget with all affiliated companies, exhibitor company has to contact domain admin so domain admin can facilitate this feature by marking the relationship with the companies. Once domain admin has configured the feature, Seller company admin can edit company profile & visit 'add widget' screen and can launch a related company widget.
Select widget type as 'Related company widget' > Enter title (a title that conveys the relationship) and Save > Publish.
Widget will appear on company profile page.