Hi @Nikhilburhade,
I’m not quite sure I understand your new ask, but you could try and create a calculated field to rank your brands, then an ifelse that recognizes the ranks of 1-5 in that ranking, then groups all the other options in to an ‘other’ category. The issue you might encounter though is if each placement has different top 5 brands, it may have issues displaying.
If you’re looking to accomplish something different or need additional assistance, please create an Arena view with sample data so that I can test out.