On a Tuesday in May, Vornado executive vice president Glen Weiss told a Real Deal forum that his firm is still in on 350 Park Avenue. “We’ve started demolition and we’re ready to roll,” Weiss said. He dismissed media reports suggesting otherwise as “not accurate.”
The project is a planned 1.5 million-square-foot skyscraper anchored by Ken Griffin’s Citadel. Vornado, Rudin, and Griffin are partners. Griffin had previously said his commitment was “under review.”
Weiss’s confidence has a shelf life. Vornado’s SEC filings disclose that the company has the right to exit the project in mid-July if Griffin pulls out. That deadline is now two months away.
The trigger for Griffin’s review was a video attack by New York City Mayor Zohran Mamdani. Mamdani, a democratic socialist elected in 2025, has made hostility to high-net-worth individuals a centerpiece of his administration. In the video, he singled out Griffin by name.
CBRE global brokerage chief Stephen B. Siegel, speaking on the same Real Deal panel, said: “Unfortunately, our mayor’s DNA is not to work with the elite or the rich or the successful.” He later told Realty Check that he regards Mamdani as “dangerous” to the city.
Siegel downplayed the idea that Griffin’s simultaneous expansion of his Miami office footprint signals a New York pullback. “He was already planning” the Florida expansion before Mamdani’s attack, Siegel said. The question is whether the attack accelerates the shift.
Griffin has been explicit about his calculus. In a 2024 interview, he cited New York’s rising crime and regulatory burden as reasons for relocating Citadel’s headquarters to Miami. The 350 Park Avenue project was seen as a hedge—a trophy asset that kept a toehold in the city.
Mamdani’s attack changes that arithmetic. A mayor who publicly vilifies a tenant does not inspire confidence in long-term lease commitments. Griffin’s review is not about the building; it is about the jurisdiction.
If Griffin exits, Vornado’s July exit clause becomes a binary decision. The firm has already sunk demolition costs. Walking away means writing off those expenses. Staying without an anchor tenant means carrying a speculative office tower in a market where institutional lenders are demanding pre-leasing thresholds of 50% or more.
The broader implication is clear: political risk is now a line item in New York City development pro formas. Mayors have always influenced business climate, but Mamdani’s targeted attacks on individual executives represent a new intensity. Developers and their capital partners must now underwrite not just interest rates and vacancy, but the mayor’s next press conference.
Griffin’s decision will be a bellwether. If he stays, the project proceeds and Mamdani’s rhetoric is revealed as noise. If he leaves, the signal to every other institutional capital allocator is that New York City is no longer a safe harbor for large-scale office development. The July deadline is not just a contract clause. It is a referendum on the city’s ability to retain its most valuable corporate citizens.