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After months of a public back and forth over Mamdani’s pied-a-terre tax, Ken Griffin isn’t ready to give up on New York after all

Reported by Fortune
Aug 5, 2026· 3 min read
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Key Takeaways
  • • Ken Griffin's Citadel will maintain its commitment to the 350 Park Avenue redevelopment as a 60% partner and anchor tenant occupying approximately one million square feet, despite a months-long public dispute with New York City Mayor Zohran Mamdani over the pied-a-terre tax.
  • • The $4.5 billion Midtown Manhattan skyscraper project, led by Vornado CEO Steven Roth, will proceed with Citadel remaining as a cornerstone tenant—a decision that reverses the combative rhetoric that followed Mamdani's April announcement of a tax on secondary residences valued over $5 million.
  • • Mayor Mamdani's Tax Day video campaign, which specifically referenced Griffin by name while standing outside his $238 million penthouse listing, was characterized by Griffin as a "weird" stunt, yet the conflict has not deterred the hedge fund's New York expansion strategy.
  • • The resolution demonstrates that despite high-profile executive-level disagreements with municipal leadership, major institutional capital continues to anchor long-term real estate commitments in New York City.
Summary
Ken Griffin's Citadel and its market-making operations will remain embedded in Manhattan's financial real estate landscape following months of contentious public exchanges with New York City Mayor Zohran Mamdani. On an earnings call, Vornado Realty Trust CEO Steven Roth confirmed that Citadel will maintain its position as a 60% partner in the 350 Park Avenue redevelopment, one of the city's most significant commercial construction projects valued at $4.5 billion. Citadel will occupy approximately one million square feet as the project's anchor tenant, solidifying the hedge fund's presence in Midtown Manhattan despite the broader political clash.

The dispute emerged in April when Mamdani announced a pied-a-terre tax targeting secondary residential properties valued above $5 million. In a calculated Tax Day video announcement, Mamdani stood directly outside Griffin's $238 million penthouse listing, explicitly naming the Citadel CEO while detailing how the new tax would generate municipal revenue. Griffin subsequently dismissed the mayor's approach as "weird," characterizing it as a publicity stunt. The exchange escalated into a broader public back-and-forth between the two figures, with supporters on both sides engaging in the controversy. Despite threats embedded in the rhetoric about removing funding from major Manhattan projects, neither party followed through on the most extreme rhetoric.

The outcome underscores a critical dynamic for institutional investors monitoring Manhattan's real estate market: even amid high-profile executive conflicts with municipal leadership, major hedge funds and financial services firms continue to commit capital to long-term Manhattan anchoring arrangements. Citadel's decision to remain in the 350 Park Avenue project—confirmed directly by the company to Fortune—indicates that political disagreements, however public, do not necessarily translate into wholesale relocation or divestment decisions for firms deeply integrated into New York's financial infrastructure. The project will proceed with Citadel as a cornerstone tenant, validating the ongoing economic gravity of Manhattan's financial district despite the volatile public relationship between one of Wall Street's most prominent executives and the city's progressive political leadership.

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Fortune After months of a public back and forth over Mamdani’s pied-a-terre tax, Ken Griffin isn’t ready to give up on New York after all