This example creates a list containing the names of all the items that are group parents in the field named "product".
Set nwSheet = Worksheets.Add
nwSheet.Activate
Set pvtTable = Worksheets("Sheet2").Range("A1").PivotTable
rw = 0
For Each pvtItem In pvtTable.PivotFields("product").ParentItems
rw = rw + 1
nwSheet.Cells(rw, 1).Value = pvtItem.Name
Next pvtItem