control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets biggest commercial banks control nearly half of the $15 trillion in assets 44% of all bank assets control nearly half of the $15 trillion in assets five banks too big to fail control nearly half of the $15 trillion in assets the five biggest commercial banks control nearly half of the $15 trillion in assets reported control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets controlled nearly half control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets 44% of all bank assets control nearly half of the $15 trillion in assets control nearly half of the $15 trillion in assets $5 trillion i dati di SNL Financial five biggest U.S. banks reported