
Ken Griffin says he had to watch it twice before it fully sank in.
When New York City Mayor Zohran Mamdani posted a social media video on Tax Day filmed from outside Griffin’s $238 million penthouse at 220 Central Park South — using the Citadel CEO as a prop to promote his new pied-à-terre tax — Griffin said his initial reaction was pure disbelief. “The first time, I couldn’t believe what I was watching,” he told CNBC’s Sara Eisen on Tuesday at the Milken Global Conference. “It took a moment to digest what I was watching.”