Which banks have the most derivatives?

Can you elaborate on which banks currently hold the largest portfolios of derivatives in their balance sheets? It's intriguing to understand which financial institutions are most heavily invested in these complex financial instruments, as they often play a significant role in risk management and hedging strategies. Are there any particular regions or countries where these banks are predominantly located? Furthermore, what kind of derivatives do they primarily hold, such as futures, options, swaps, or a combination of these? Lastly, how do these banks ensure they effectively manage the risks associated with their derivative holdings?