Hudson River Trading, a New York electronic market maker, took in $11.4 billion in trading revenue during the second quarter. That was roughly four times what the firm collected in the same period a year earlier, according to people who asked not to be named because the figures are private.
Net income came to $7.4 billion for the quarter. Adjusted EBITDA, a rough measure of cash profit, reached about $8 billion. That was more than 350% above the $1.75 billion it earned in the second quarter of last year. HRT declined to comment through a representative.
A market maker stands ready to buy or sell at any moment, profiting from the gap between bid and ask prices. This year's violent market swings have pushed more clients to trade, and firms like HRT, Citadel Securities, and Jane Street have all posted records as a result. For HRT, the second quarter was its best ever - even while a rival down the street was losing billions.
Jane Street, one of HRT's biggest competitors, recorded a $15 billion loss in July. It was the firm's first monthly decline in a decade. Part of the damage came from Jane Street's stake in Situational Awareness, an AI-focused hedge fund caught in the tech selloff. Asian equity trades also went the wrong way.
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The episode shows how blurry the lines have become. Market making, proprietary trading, and investing used to be separate businesses. Now firms like HRT and Jane Street mix all three, selling debt to fund global expansions and running longer-horizon strategies alongside their high-speed trading desks.
HRT executives told debtholders on a call that the company remained profitable in July despite the market turmoil. The firm had no direct exposure to the struggling fund, the people said.
So why should you care about two trading firms' quarterly numbers?
These firms are the plumbing of the stock market. When they make money, it usually means volume is high and prices are moving fast. That same volatility is what pushes your portfolio up and down.
HRT staying profitable during a month that wiped out a rival suggests the recent turbulence hasn't broken the system. It also means the big money still betting on choppy conditions is still present.
The deeper takeaway is that the old wall between "trading for clients" and "placing your own bets" has collapsed. When a firm like Jane Street loses $15 billion in a single month, it is not just a Wall Street story. It is a reminder that the firms executing your trades are also risking their own capital - and sometimes those risks don't pay off.