Ken Griffin, the billionaire founder of hedge fund Citadel, urged business leaders to resist the socialism of New York City Democratic Mayor Zohran Mamdani, warning that the Big Apple’s business environment will otherwise be destroyed.

Griffin said at a June 18 event in Manhattan that business leaders “need to find their voice and fight for their city,” per a report from Fox Business.

“My advice is to speak up. What’s the worst that’s going to happen? It will be that New York empties of talent and that’s a catastrophe,” he cautioned.

“If the mayor wants to say a few words about you, your record speaks for itself: You create jobs, you create value and you pay taxes.”

Griffin, who moved his primary residence from Chicago to Miami in recent years, has a net worth of $48.3 billion.

Citadel has two offices in Midtown Manhattan, one on Park Avenue and one on 5th Avenue.

“Everything should be viewed through the lens of, Citadel will be here far longer than he’ll be mayor,” Griffin continued.

Fox Business noted that Griffin and Mamdani, a self-proclaimed democratic socialist, have publicly sparred in recent months over the latter’s progressive tax policy.

Mamdani even filmed a video outside of Griffin’s luxury property in New York City to draw attention to his proposed tax on second homes worth over $5 million.

Griffin will speak with Mamdani “at some point in the months ahead.”

“Let’s see where he is on the state of policy at that time,” he added.

“Actions speak louder than words.”

Some critics have warned that Mamdani will drive away the city’s tax base if he continues antagonizing business leaders and high earners.

Charles Gasparino wrote for the New York Post on May 9 that an unnamed New York City finance tycoon is likewise weighing a move to Miami.

“He employs plenty of people — from highly compensated executives to middle-class support staff. They all pay their taxes in addition to their mortgages and grocery bills. They drop plenty of cash at the Big Apple’s restaurants and theaters,” Gasparino noted.

“The higher-ups are big donors to local charities, the museums and the opera,” he added.

“He says he hasn’t made up his mind just yet but based on the tenor of our conversation, he has at least one foot out the proverbial door. He’s serious.”

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