Ken Griffin's Citadel navigates Trump turbulence with unorthodox methods

Market-making entity Citadel Securities sets sights on growth in Japan and China

20250708N Ken Griffin Citadel

Citadel founder Ken Griffin has built one of the most profitable hedge funds in history. (Citadel)

YASUHA MINAMI and YUTA SAITO

TOKYO/NEW YORK -- Ken Griffin, a prominent U.S. investor, is building a financial empire of a different shape. Not only has his hedge fund, Citadel, outperformed competitors in terms of gains, he has also created Citadel Securities, a trading platform that looks to expand in Asia, especially China. Nikkei takes a closer look at this financial hegemon.

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