Citadel Securities valued at $22 billion after investment from Sequoia, Paradigm

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The round was led by Sequoia. Alfred Lin, a partner at Sequoia, will join the board of Citadel Securities, the company said.

Founded by Ken Griffin, Citadel Securities provides trading services to asset managers, banks, broker-dealers and hedge funds. Its institutional business serves over 1,600 clients.

Last year, the company insisted it did not ask Robinhood (NASDAQ:HOOD) or any other firm to restrict or limit trading on GameStop Corp (NYSE:GME) and other so-called “meme stocks” at the height of the retail-driven trading frenzy in January 2021, after accusations from some retail investors.