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'He put me in harm's way': Ken Griffin responds to Mamdani viral video of his $239 million NYC penthouse

Reported by Fastcompany
May 6, 2026· 3 min read
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Key Takeaways
  • • Billionaire Ken Griffin accused NYC Mayor Zohran Mamdani of endangering his safety by filming a viral video outside his $238 million penthouse to promote a pied-à-terre tax on wealthy second-home owners, citing the assassination of another CEO blocks away as precedent for the security risk.
  • • Griffin and development partner Vornado CEO Steven Roth signaled potential jeopardy to the $6 billion Park Avenue supertall tower project (350 Park Avenue), a major joint venture with Rudin that represents significant tax revenue and job creation for Manhattan.
  • • Griffin stated the Park Avenue tower will "probably" proceed but vowed to shift future Citadel expansion and job growth to Miami in direct response to the mayor's actions, signaling a material geographic reallocation of capital and employment.
  • • Both Griffin and Roth characterized Mamdani's video as "irresponsible and dangerous" and called for the mayor to repair relations with the business community, framing the incident as emblematic of hostile municipal policy toward wealth creators.
  • • The controversy centers on competing priorities: Mamdani's progressive tax agenda targeting billionaire second-home ownership versus business community concerns about political targeting and safety implications that could influence major capital investment decisions in New York City.
Summary
Billionaire Ken Griffin and Vornado CEO Steven Roth have publicly condemned New York City Mayor Zohran Mamdani over a viral video filmed outside Griffin's $238 million Manhattan penthouse, used to promote a municipal pied-à-terre tax targeting wealthy second-home owners. Griffin framed the incident as a direct safety threat, stating: "What really upset me about the video was the fact that he put me in harm's way. You know, he seems to have forgotten that the CEO of another American company was assassinated just blocks from where I live in New York." Griffin emphasized that exposing any citizen to such risk is inappropriate for municipal leadership.

The conflict carries significant real estate implications. Griffin and his partners hold a controlling interest in the planned 350 Park Avenue supertall tower, a $6 billion joint venture also involving Rudin that is positioned as a major economic driver for Manhattan's commercial real estate market. While Griffin stated the project will "probably" proceed, he signaled material shifts in future capital deployment. Roth called Mamdani's approach "irresponsible and dangerous" and urged the mayor to repair damaged relations with the business community, underscoring concerns that hostile municipal positioning could deter future investment.

Griffin explicitly linked the video controversy to geographic capital reallocation, vowing that Citadel will expand its footprint and job creation in Miami as a direct response to New York's political environment. This represents a concrete capital flight signal from one of Wall Street's most prominent figures and largest institutional investors. The dispute reflects a fundamental tension between progressive municipal tax agendas targeting wealth concentration and business community concerns about political targeting, safety implications, and the stability of the investment climate required to justify billion-dollar development commitments in New York City.

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Sources

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

Fastcompany 'He put me in harm's way': Ken Griffin responds to Mamdani viral video of his $239 million NYC penthouse