There is a 10 storey office building in UK. It has no basement.
If you enter the bulding from the street, you will find the offices of Groupon Enterprises on that floor.
Nicot Enterprises occupies the very top floor.
One floor above the Groupon offices are the company offices of Secret World.
So
The offices of Seth Reed company are on the ______d floor.
The offices of Siracuse Ventures are on the ______th floor.