AlphaMaven AlphaMaven

Mayor Mamdani vs. Ken Griffin: Billionaire threatens to pull $6B Midtown project over NYC pied-a-terre tax

Reported by Abc7ny
May 6, 2026· 3 min read
Save Post LinkedIn Email
Key Takeaways
  • • Ken Griffin, Citadel CEO and billionaire hedge fund founder, threatened to scale back or abandon his planned $6 billion Midtown Manhattan project (350 Park Avenue) citing Mayor Zohran Mamdani's public criticism over a proposed pied-à-terre tax on high-end second homes.
  • • Mayor Mamdani released a video filmed outside Griffin's $238 million Central Park South penthouse—purchased as the most expensive residential property in the United States—promoting the pied-à-terre tax targeting wealthy non-residents who store wealth in NYC real estate.
  • • Griffin characterized the mayor's video as "creepy and weird" and raised security concerns, citing the recent fatal shooting of UnitedHealthcare's CEO blocks away; he countered by emphasizing Citadel's $2.3 billion in city and state taxes and $650 million in charitable contributions.
  • • The proposed project would create 15,000 permanent jobs according to Griffin's claims; Governor Kathy Hochul signaled support for both the pied-à-terre tax and Griffin's investment, attempting to balance tax policy with economic development incentives.
  • • Griffin indicated he would redirect capital toward Florida investments, specifically his planned 54-story supertall tower on Miami's Biscayne Bay, calling the Miami project an "immediate and direct consequence" of the mayor's tax policy decision.
Summary
New York City Mayor Zohran Mamdani's public advocacy for a pied-à-terre tax has triggered a high-stakes confrontation with billionaire hedge fund founder Ken Griffin, threatening a $6 billion real estate investment and 15,000 permanent jobs. Mamdani released a viral video filmed outside Griffin's Central Park South penthouse—valued at $238 million and noted as the most expensive residential property ever purchased in the United States—explicitly naming Griffin among wealthy individuals who should "pay more taxes." The mayor framed the pied-à-terre tax as designed specifically for "the richest of the rich, those who store their wealth in New York City real estate, but who don't actually live here."

Griffin responded forcefully, calling the video "creepy and weird" and raising personal security concerns by reference to the recent fatal shooting of UnitedHealthcare CEO Brian Thompson, which occurred in Manhattan. The Citadel CEO countered with his company's financial contributions to the city, stating that he and his employees have "paid $2.3 billion in city and state taxes" and directed "$650 million in charitable gifts" to city institutions. While Griffin suggested he would "probably" proceed with his Midtown development, he signaled a strategic pivot toward Florida, citing his planned 54-story supertall tower on Miami's Biscayne Bay as an "immediate and direct consequence" of Mamdani's policy approach.

Governor Kathy Hochul navigated the competing interests by publicly supporting both the pied-à-terre tax and Griffin's investment. Hochul stated that she would likely visit Griffin to thank him for the $6 billion project and "consider more," indicating her administration's intent to welcome major capital investment while pursuing progressive tax measures. The tension reflects the broader policy challenge facing New York officials: balancing wealth taxation proposals with retention of major private capital and job creation. Griffin's willingness to redirect a multi-billion-dollar development to Florida demonstrates the sensitivity of ultra-high-net-worth individuals and institutional investors to aggressive tax policies targeting real estate holdings in premium markets.

Go deeper than the headline

Research every firm in this story, track the ones that matter and get the daily briefing — free for 7 days.

Start your free 7-day trial

Sources

1 outlet

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

Abc7ny Mayor Mamdani vs. Ken Griffin: Billionaire threatens to pull $6B Midtown project over NYC pied-a-terre tax