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Ken Griffin Supercharges His Miami Bet After Mamdani Tax Fight

Reported by Bloomberg ·Chicagobusiness ·Crainsnewyork
Jun 11, 2026· 2 min read
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Key Takeaways
  • • Ken Griffin's Citadel is accelerating investment in Miami and expanding its office operations there in direct response to New York City Mayor Zohran Mamdani's viral tax-the-rich video that featured Griffin's $238 million penthouse.
  • • Griffin stated publicly that Citadel will create jobs in Miami as a consequence of NYC's tax policies, signaling a strategic shift of resources away from New York despite not announcing a complete departure from the city.
  • • Mayor Mamdani filmed his pied-à-terre tax advocacy video outside Griffin's Manhattan building, specifically calling out the billionaire hedge fund manager in the context of New York's wealth taxation debate.
  • • The dispute reflects broader tensions between ultra-wealthy executives and progressive municipal tax initiatives, with Citadel's Miami expansion representing a tangible business response to perceived hostile tax policy in New York.
  • • Real estate stakeholders, including Vornado's leadership, have publicly defended against criticism stemming from the Mamdani-Griffin controversy, indicating broader implications for NYC's commercial real estate market and office development pipelines.
Summary
Ken Griffin, CEO of Citadel, has announced plans to substantially increase his hedge fund's investment and headcount in Miami, framing the decision as a direct response to New York City Mayor Zohran Mamdani's viral tax advocacy campaign. Mamdani filmed a high-profile video promoting a pied-à-terre tax on wealthy New York residents outside Griffin's $238 million penthouse, explicitly calling out the billionaire in his push for progressive taxation on the city's elite.

Griffin did not announce a complete relocation of Citadel from New York but stated clearly that his company would prioritize Miami expansion, directing new jobs and resources to the Florida office rather than maintaining or growing its New York footprint. In public statements, Griffin emphasized that Citadel's Miami growth would result directly from New York's tax environment, framing the decision as a rational business response to municipal policy. The hedge fund manager's position echoes his previous tax-driven relocations—notably his move from Chicago to Miami, which followed Illinois' consideration of progressive income tax measures.

The dispute has become emblematic of a broader conflict between ultra-wealthy executives and progressive taxation advocates in major metropolitan areas. Mayor Mamdani's decision to specifically target Griffin in his tax video, filming at the billionaire's iconic Manhattan property, crystallized the confrontation and generated significant media attention around wealth taxation and business retention in New York.

The controversy has reverberated across New York's real estate and finance sectors. Vornado leadership, including executive Glen Weiss, publicly defended against criticism stemming from the Mamdani-Griffin dispute at industry forums, underscoring the broader implications for commercial real estate development and market confidence. Vornado emphasized its continued commitment to major projects like 350 Park Avenue despite the heated political climate surrounding taxation and corporate investment decisions.

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Sources

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Bloomberg Ken Griffin Supercharges His Miami Bet After Mamdani Tax Fight Chicagobusiness Ken Griffin supercharges his Miami bet after Mamdani tax fight Crainsnewyork Ken Griffin supercharges his Miami bet after Mamdani tax fight - Crain's New York