Billionaire Trader Gerko Makes $660 Million UK Family Office Bet

XTX Markets founder Alex Gerko’s family office has disclosed its total assets for the first time, giving a rare glimpse into how one of Britain’s richest finance entrepreneurs is diversifying his wealth.

The former Deutsche Bank AG trader injected £386.6 million ($515.8 million) of equity into his private investment firm, Cromulon Capital, by early April last year, according to the firm’s recently filed debut accounts, putting it among London’s biggest family offices for a single fortune. Gerko, 46, separately provided £107.7 million in debt financing to the firm, which had almost £30 million of its investments tied up in money-market products, according to the filing, which didn’t specify individual holdings further.