Go to Orbis. Go to "Activities & industry" > "Entity type" > "Banks" > Go.
Search WRDS (you need to obtain your WRDS account) and choose Bank Regulatory to access accounting data for bank holding companies, commercial banks, savings banks, and savings and loans institutions.
Go to Bloomberg (available in the Financial Room of Barcelona IESE Library. Ask staff for password). Type EQS (Equity Screening) and press <GO>. Click on the Sectors button, select Financials: Banking and then click Update and See Results.