There are numerous precursors Griffin may have cited. Within the nineties, George Soros turned well-known for shorting the British pound. On the time, Soros, together with the financiers Julian Robertson and Michael Steinhardt, outlined the general public picture of hedge-fund managers as funding wizards who made fortunes via enormous bets, contrarian calls, iron stomachs, and a willingness to function near—or over—the regulatory line. Griffin turned a frontrunner of the following era partly by aggressively automating college-level math to research trades. However he is aware of that he’s not a mathematical genius on the order of Jim Simons or David Shaw—pioneering “quants” who harnessed computing energy to extract cash from the markets. Nor did Griffin point out the opposite phylum of contemporary Wall Avenue, the descendants of Warren Buffett and Charlie Munger: the virtuosos of the long-term choose who establish shares buying and selling at wise costs and allow them to compound for years.
Griffin has by no means pretended to be a radical innovator or a savant. His mission has all the time been totally different: to construct finance companies that replace their methods and infrastructure so relentlessly that they beat rivals not simply at the moment however over many years. Paradoxically, sustaining a constant edge requires fixed, unsentimental inside change—of processes, know-how, and other people. Citadel takes concepts which might be simply starting to flow into and improves them, with math or know-how or information that others haven’t thought to make use of. As Griffin as soon as acknowledged, “If there are a thousand issues that make Citadel particular, there might be only a few which might be truly actually distinctive and bespoke to Citadel.” Earlier than the millennium, for instance, Citadel embraced the rising strategy of “event-driven” buying and selling—methods crafted to benefit from main company information similar to merger offers, bankruptcies, or rules. In 2014, after many different merchants had adopted event-driven buying and selling, Citadel paused the follow.
“To maintain your physique from touching the identical floor as earlier our bodies, we cowl the desk with this strip of paper that’s narrower than all our bodies.”
Cartoon by Asher Perlman
All this churn has been guided by Griffin’s worry that every part he’s constructed is fragile—essentially the most spectacular sandcastle on the seaside. His longtime deputy, James Yeh, who’s now retired, advised me, “When you speak to 100 executives, ninety per cent of them will inform you, ‘We’re by no means happy with what we’ve completed earlier than, we all the time need to do higher, you possibly can’t relaxation in your laurels, and also you’d higher consistently attempt to enhance.’ However ninety-nine per cent of them don’t truly imply it. Ken truly means it.”
Provided that Griffin lacks a signature buying and selling or investing type, his achievements can really feel each confounding and imitable. However no one has duplicated his financial success—or constructed two separate companies which might be so wildly worthwhile. Citadel’s fund now manages sixty-eight billion {dollars}, greater than nineteen billion of which is Griffin’s and his colleagues’ personal cash. Though Griffin doesn’t immediately run Citadel Securities, he’s its non-executive chairman and owns at the very least seventy-five per cent of it. That enterprise trades greater than 100 and seventy trillion {dollars} a yr for institutional shoppers and retail traders. In 2025, it generated $12.2 billion in income on these trades and $5.4 billion in web revenue. Bloomberg estimates that Citadel Securities accounts for practically half of Griffin’s web value, which has tripled up to now six years. (Being the highest man on Wall Avenue makes him solely the world’s thirty-seventh-richest individual, in accordance with Forbes—properly behind the six tech giants who prime the chart.)
In an period during which revenue inequality is a supply of accelerating political and social concern, Griffin is an unabashed massive spender. For him, half a billion {dollars} is a primary unit of foreign money. He spent that a lot for twenty-seven acres in Palm Seashore; for the joint buy of a Jackson Pollock and a Willem de Kooning; in presents to Harvard; and in political contributions, largely to conservative candidates. He dropped a mere forty-five million on a stegosaurus skeleton, referred to as Apex, which is now on mortgage to the American Museum of Pure Historical past (although “the dream,” Griffin advised me, “is someday she’ll be in Miami”).
Griffin might determine that working for political workplace is a guess he’s not keen to make: a Harvard man with a hedge fund and a home on the French Riviera may unite folks throughout events in distaste. Then once more, he has the crafty and the means to replace his picture, and he stays bold. He advised me, “I take nice pleasure in problem-solving. If there was a second that got here to go the place these abilities can be of essential significance for our nation, in fact I’d look to be concerned.”
