Complex sentence: Its given address in Midtown Manhattan at 590 Madison Avenue, a 41-story tower, has no record of its tenancy, although the address is shared by Bain Capital, of which Romney was once Chief Executive Officer, among other companies.
Split into simpler sentences: Its given address in Midtown Manhattan at 590 Madison Avenue, a 41-story tower, had no record of its tenancy. The address is shared by Bain Capital, of which Romney was once Chief Executive Officer, among other companies.