Pull Up List of Partners with Subpartners Only

1. Navigate to List > Search > Saved Searches > New > Partner.
2. Criteria tab > Standard subtab> Formula (Text): {parent} is not empty.  
3. Results tab > Select Sub Of > Add.
4. Enter Title field.
5. Set Public = T.
6. Show in Menu = T.
7. Click Save&Run button.

Note: The results only show Partners with Subpartners.