Citadel Commits $4.5B to New York Tower It Threatened to Quit

Ken Griffin’s Citadel is pressing ahead as a lead partner on the $4.5 billion redevelopment of 350 Park Avenue in Manhattan, months after Griffin publicly threatened to pull the firm out of New York. The commitment lands even as Citadel’s own headquarters tower in Miami, the city Citadel formally relocated to in 2022, is under active construction.

Why it matters

Miami’s developer community has treated Citadel’s 2022 headquarters move as a marquee proof point for the state’s finance-industry migration. Griffin’s threat to abandon New York entirely, made after Mayor Zohran Mamdani proposed a pied-a-terre tax targeting homes over $5 million, including Griffin’s own Manhattan penthouse, seemed to reinforce that story. Instead, Vornado Realty Trust confirmed Citadel remains a roughly 60 percent partner in the Park Avenue project, and demolition of the prior building on the site was already underway by mid-2026. Griffin told Citadel staff, in comments reported by Fortune, that the firm intends “to be here for decades.” For developers reading the Miami arrival as a one-way signal, Citadel’s own capital says the firm is building in both cities simultaneously, not choosing one over the other.

The numbers

At 350 Park Avenue, Citadel and Citadel Securities are anchoring at least 850,000 square feet in a supertall designed by Foster + Partners, in partnership with Vornado and Rudin. New York’s City Council approved the project unanimously. In Miami, Citadel’s headquarters tower at 1201 Brickell Bay Drive, developed by Related Companies, is a $2.5 billion, 63-story building totaling 2,118,650 square feet, including 1,485,174 square feet of office space. Citadel bought the Brickell land for $363 million in 2022.

What’s next

Vertical construction on the Miami tower could begin later in 2026, with completion not expected until the early 2030s given the scale of the build. In New York, the Park Avenue project is moving through financing, with Vornado disclosing a construction loan nearing $3.3 billion. Neither project has been scaled back. For national developers watching where major financial-sector tenants ultimately plant flags, Citadel’s answer this year has been both cities at once, not a single winner.