Citadel Investment Group, LLC - As of January 2016, Citadel manages more than $25 billion in capital and is one of the world's largest asset managers. Citadel was formed in 2002, and is a leading market maker, providing liquidity and trade execution to retail and institutional clients. Citadel Securities automation has resulted in more reliable trading at lower costs and with tighter spreads.

Citadel provides cash infusion to e*Trade Financial and many other brokers