Citadel is a privately owned company headquartered in the US. Founded in 1990, the company employs approximately 4060 individuals, specializing in financial services. Functioning as a hedge fund and financial services company, Citadel managed over $39 billion in assets as of 2021.
Citadel CEO Ken Griffin is reportedly pushing back against New York City Mayor Zohran Mamdani, threatening to halt the $6 billion redevelopment of 350 Park Avenue. On April 24, 2026, Citadel COO Gerald Beeson warned in an email, reviewed by The Wall Street Journal, that the firm might not proceed with the project, which is projected to generate 6,000 construction jobs and support over 15,000 permanent positions. This warning follows Mayor Mamdani's use of Griffin's $238 million Manhattan penthouse as a prop in a ‘tax-the-rich' campaign video. Earlier on April 24, Mayor Mamdani insisted his push for a new tax on expensive second homes was not "motivated by any one individual," addressing reporters' questions about singling out Griffin's property. Previously, on April 23, Citadel criticized Mayor Mamdani for highlighting Griffin's penthouse purchase.
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