The New York Fed is putting together a new banking industry report which can be found here. It's not as comprehensive as the one that the FDIC puts together on a quarterly basis, but it is valuable in that it goes beyond just the commercial bank subsidiary and looks at the whole bank holding company. As the following chart shows, less than 80% of assets consolidated on an average Hold Co's balance sheet are held in the commercial bank. Some other interesting data on BHCs is also below including geographic exposure of systemic assets (i.e. to Europe).