Please organize sub customers (child) under the parent in the main Companies view in Hudu. The children should be indented with a parent child expanding tree control for expand or collapse. Today even in v2.28.5 the parent lands in the list wherever it does based on name descending. The parent names are not always obvious in real-life with similar name. The linkage within the parent and child companies, is very useful!
As an MSP, we don't track customer locations as sub companies we use locations in Custom Asset, however we still have a lot of customers that we serve the parent company and many of their independant subsidy businesses that do not relate together for documentation purposes.