When results (financial or non-financial) for any member of the group are updated, then Fathom will prompt you to manually update the group to ensure that the group data is reflective of the underlying members.
Update financials and non-financials
To update a group, from the 'My Companies' screen click 'Setup' > 'Update Consolidated Group'
Then select the date range to include in the group. Then click 'Update Now'.
Add or remove members
To change the entities in a consolidated group go to 'Setup' and click on 'Manage Group'. You must have at least two companies in the group.