Sorry Judi that was a typo – what I was trying to type was when saving the filter you have the option to save as and choose a user or company wide filter. You also have the option to save it to the module list which would have the filter appear under inventory or by not selecting the option to save to the module when saved it would only appear under the drop down menu by clicking filter.
There is not currently a way to setup a subfolder of filters in a company database this sounds like something you could contact your Spire partner regarding to ask about submitting a feature request.