From the "Office of the Comptroller of the Currency (OCC)" we have the Quarterly Report on Bank Trading and Derivative Activities (Second Quarter 2016), Table 4 with the Top 25 Commercial Banks, Savings Associations, and Trust Companies who actively hold derivatives. I would say it best to stay away from these companies!
From today's article "These 2 American Banks Are Now The Most Systemically Dangerous", here are the banks and companies considered by the Financial Stability Board to be "Global Systemically Important Banks" (G-SIBs), due to their riskiness. The Financial Stability Board was established after the global financial crisis in 2009 by the Heads of State of the G20 with a mandate to "promote financial stability." Any relative risk ranking that finds Citibank and JP Morgan more risky that Deutsche Bank has to be concerning to U.S. regulators.
Compare the lists, see any similarities? Avoid these like the plague, or at lease only use them for small operational accounts, with no large sums in their care. Hope this helps.