Underbroker

Harlan Graves is a senior partner at a prestigious firm. Under the alias of the Underbroker, Harlan leads an underground financial institute from the criminal underworld of Gotham City. He serves as a broker for criminals, coordinating with Gotham's crooks and allowing them to store their cash there for a share of the loot. And somehow, the Underbroker has even managed to keep his establishment a secret from Batman himself.