The deal values Citadel Securities at $22b, and is the first time it has taken any outside investors. Griffin plans to spend the money on more aggressive international expansion.
Its prowess has attracted envy from other parts of Wall Street, increasing attention from regulators and politicians, and resentment among many of the retail traders for whom Citadel Securities acts as market maker.
https://www.ft.com/content/188afc27-5c08-4b06-b066-d79522ed787e