Billionaire Ken Griffin threatens to take business out of NYC after Mamdani video

NBC New York reports that NYC Mayor Zohran Mamdani called out billionaire Ken Griffin by name in a video promoting Gov. Hochul's pied-à-terre tax on luxury second homes, specifically citing Griffin's $238 million penthouse purchase. Three weeks later, Griffin responded at a Beverly Hills conference, stating the mayor's comments have prompted him to accelerate Citadel's expansion in Miami and hinting his planned 350 Park Avenue mega-tower project may be reconsidered. The reporting is sourced with direct quotes from Griffin, Mamdani, and Council Speaker Julie Menin, and the bylined journalist (Andrew Siff) is identified; however, the article lacks depth on policy details or the mayor's broader tax proposal beyond the single example. Independent coverage corroborates Griffin's response and adds detail that Griffin characterized the video as "creepy and weird" and claimed it raised safety concerns—context the NBC article does not include—suggesting the piece focuses on the political conflict rather than its full dimensions. Watch for further statements from Griffin on the 350 Park Avenue project timeline and any formal response from the mayor's office to safety allegations.