Jane Street billionaire co-founder is unkempt – Business News
The reclusive billionaire co-founder of Wall Street hedge fund Jane Street is an unkempt hippie who has spent his wealth on Burning Man boondoggles, casinos and funding a coup in Africa, in response to a report.
Rob Granieri, who employed Sam Bankman-Fried out of faculty earlier than he grew to become often called the notorious cryptocurrency trader who went to jail for fraud, could be the strongest Wall Street billionaire you’ve by no means heard of.
The final remaining co-founder of Jane Street, the secretive trading giant that pulled in $17 billion during the primary half of 2025, has no official title and no headshot within the company listing, in response to Bloomberg News.
Rob Granieri is a co-founder of Wall Street trading firm Jane Street. Scarlet Pearl Casino Resort
That invisibility has grown more durable to take care of as Jane Street’s earnings exploded. The firm now handles more than 90,000 merchandise throughout 240 exchanges and accounted for almost a quarter of all US-listed ETF trading quantity final yr.
With $53 billion of its own capital, Jane Street raked in $17 billion within the first half of 2025 alone — incomes in two weeks what as soon as took a yr.
Meanwhile, Granieri, 53, typically goes unrecognized, even inside his own firm. He has constructed a fortune by conserving himself and his company out of view, thriving on a combine of secrecy, eccentricity and contradiction, Bloomberg News reported.
Granieri is a mogul who stays out of the limelight and spends his wealth in unorthodox methods. Methacton High School
Known for working odd hours, shunning long holidays and displaying up in rumpled garments, he has spent many years implementing Jane Street’s invisibility — as soon as fuming when a younger trader was quoted as saying that his job was secure during the financial disaster.
Granieri himself has no official title on the firm he co-founded in 1999 after splitting from trading powerhouse Susquehanna. In the company listing, his profile stands out for missing even a headshot.
Earlier this yr, nonetheless, Granieri made headlines when he was allegedly tricked into funding a plot to buy assault rifles, Stinger missiles and grenades that have been used to stage a failed coup in South Sudan.
Granieri was by no means charged with a crime.
Granieri has attended Burning Man, the humanities and crafts competition within the Nevada desert. Siobhan McAndrew / USA TODAY NETWORK through Imagn Images
He lives like a recluse in Manhattan, dressing in schlubby garments on the workplace whereas chopping free at Burning Man or his Mississippi on line casino, in response to the report.
With his fedora and penchant for ponytails, he seems more like a bohemian artist than the pinnacle of one of Wall Street’s most profitable trading store.
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At Jane Street, Granieri inculcated a tradition that mirrors his quirks. Employees wager on something — coin tosses, weight-gain contests, even “Money in the Hat,” the place employees stuff payments and names into a cap earlier than a winner is drawn.
Traders even made markets on who would go home with a feminine colleague, prompting Granieri to ship a stern memo warning: “Don’t make the situation worse by talking about it, making jokes, placing bets.”
Away from Wall Street, he pours money into the Scarlet Pearl, a Mississippi on line casino. Google Maps
Jane Street’s Manhattan places of work boast an in-house chef, rooms designated for poker video games and video video games, in response to Bloomberg News.
The Post has sought remark from Jane Street.
Unlike different billionaires who scoop up trophy properties, Granieri prefers renting flats — a behavior that when landed him in courtroom over a $10,372 unpaid invoice, Bloomberg News reported.
His solely actual indulgence is food: colleagues recall him joking that there was no need to cook when he might eat at Manhattan’s Le Bernardin each evening, in response to the report.
Jane Street is the secretive trading giant that pulled in $17 billion in simply the primary half of 2025. REUTERS
Away from Wall Street, he pours money into the Scarlet Pearl, a Mississippi on line casino the place he surprised managers in 2019 by approving Jim “Mattress Mack” McIngvale’s $3.5 million wager on the World Series.
McIngvale, proprietor of Houston’s Gallery Furniture, positioned the wager on the Houston Astros to win the 2019 World Series. The Astros went on to lose the World Series in seven video games to the champion Washington Nationals.
At Burning Man, he as soon as helped construct a geodesic dome filled with yoga balls. He referred to as the exhibit “Balls Deep.”
LuAnn Pappas, who runs the Scarlet Pearl, admitted she was surprised to be taught her boss would spend days within the Nevada desert “like the hippie movement,” unshowered and grinning as he mingled with artists.
