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How Ken Griffin falls out of love with a city, what’s lost and whether NYC is next - Crain's New York

Reported by Crainsnewyork
Apr 30, 2026· 3 min read
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Key Takeaways
  • • NYC Mayor Zohran Mamdani publicly featured Ken Griffin's $238 million Central Park South penthouse in a viral April 15 tax-the-rich promotional video advocating for a proposed pied-à-terre tax on luxury second homes worth $5 million or more, sparking a direct confrontation between the city and Citadel's leadership.
  • • Citadel COO Gerald Beeson responded with a company-wide email signaling the hedge fund may withdraw from a planned $6 billion Midtown office tower redevelopment project, citing the mayor's comments as evidence of anti-wealth sentiment that would undermine business confidence in New York.
  • • Mayor Mamdani doubled down on his criticism Friday, defending the public callout as necessary to clarify that the proposed tax targets "a very select group of properties" and does not apply broadly, while declining to express regret for singling out Griffin specifically.
  • • Griffin has escalated his objections by announcing plans to meet with Governor Kathy Hochul to discuss New York's future, bypassing the mayor and suggesting broader frustration with the city's direction beyond the immediate tax proposal.
  • • The dispute reflects Griffin's broader pattern of relocating operations—Citadel previously moved from Chicago to Miami, with the CEO citing 25 bullet holes in a Chicago building as a factor driving the exodus.
Summary
The confrontation between New York City Mayor Zohran Mamdani and billionaire hedge fund manager Ken Griffin has escalated into a significant threat to a major real estate development project. On April 15, Mamdani released a viral promotional video for a proposed pied-à-terre tax targeting Manhattan's luxury second homes valued at $5 million and above. The video prominently featured Griffin's 24,000-square-foot penthouse on Central Park South—purchased for $238 million in 2019 and publicly described at the time as the most expensive home in the United States—as an example of property that would be subject to the tax under Governor Kathy Hochul's proposal.

Griffin's organization responded swiftly with displeasure. On Thursday, Citadel Chief Operating Officer Gerald Beeson circulated a company-wide email obtained by media outlets, characterizing the mayor's actions as demonstrating a view that wealthy individuals "do not contribute enough to the greater good." The email signaled potential withdrawal from Citadel's planned redevelopment of a Midtown office tower, a project the hedge fund expected could generate approximately $6 billion in spending. The veiled threat represents a substantial stake in New York's real estate and economic development pipeline.

When pressed by reporters on Friday, Mayor Mamdani showed no signs of backing down. He defended his decision to feature Griffin's property specifically, arguing that it was necessary to demonstrate the tax's narrow scope. Mamdani emphasized that the penthouse was "the most expensive home in the United States of America, publicly reported" when purchased, and that highlighting it clarified that the tax would not broadly apply to all property owners. He framed the selective callout as a means of countering what he characterized as attempts to misrepresent tax increases as universal rather than targeted.

Escalating the dispute further, Griffin announced plans to meet directly with Governor Hochul to discuss New York's "future," effectively circumventing the mayor's office and signaling broader dissatisfaction with the city's direction. This maneuver mirrors Griffin's previous corporate relocation decisions; Citadel moved its headquarters from Chicago to Miami, with Griffin citing security concerns including 25 bullet holes in a Chicago building as contributory factors. The pattern suggests Griffin is willing to reallocate operations when he perceives an unfavorable business and political environment, making the threatened withdrawal from the New York development project a credible concern for city stakeholders.

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Crainsnewyork How Ken Griffin falls out of love with a city, what’s lost and whether NYC is next - Crain's New York