To date, no firms have been designated, though the FSOC is actively considering possible designees. Of course, the five previously free-standing investment banks have either been dismantled (Lehman), converted into bank holding companies (Goldman Sachs and Morgan Stanley), or absorbed into a bank holding company (Bear Stearns and Merrill Lynch).
The other designation authority granted the FSOC is for financial market utilities, defined as multilateral transfer, clearing, or settlement systems for payments, securities, or other financial transactions among financial institutions.