The list of billionaires who spent big in a last-ditch effort to keep Zohran Mamdani from becoming NYC mayor

Michael Bloomberg, the former three-term mayor of New York City and the billionaire owner of Bloomberg LP, donated $5 million to pro-Cuomo and anti-Mamdani groups since June, making him the largest single donor of the general election.

That includes a $1.5 million contribution to Fix the City and a $3.5 million contribution to For Our City.

And that's on top of the $8.3 million he gave to the group before the primary.

Bloomberg's new contributions came as he publicly reaffirmed his support for Cuomo on October 29, saying he "has the experience and toughness to stand up for New Yorkers and get things done."

The contributions are also notable given that the former mayor met with Mamdani in September, with a Bloomberg advisor calling the meeting "cordial" and "substantive."

Bloomberg is worth $109.4 billion, according to Forbes.

Joe Gebbia, a cofounder of Airbnb, spent a total of $3 million on the race, donating $1 million apiece to Fix the City, Defend NYC, and Put NYC First.

Gebbia serves as the Chief Design Officer of the United States under President Donald Trump.

He repeatedly signaled his opposition to Mamdani on X, writing in one recent post that Sliwa could be a "hero" by dropping out of the race and giving Cuomo an easier shot at beating Mamdani.

Gebbia is worth $7.7 billion, according to Forbes.

Bill Ackman, the CEO of Pershing Square Capital Management, poured $1.25 million into the race since June, giving $1 million to Defend NYC and $250,000 to Fix the City. That's on top of the $500,000 he gave to Fix the City before the primary.

Ackman has been a vocal opponent of Mamdani, and like Gebbia, has publicly encouraged Sliwa to drop out of the race.

Mamdani singled out Ackman on the stump, naming him among the billionaires who oppose his candidacy. He has also mocked the hedge fund manager for his "1000-word tweets."

Ackman is worth $9.3 billion, according to Forbes.

Ronald Lauder and his wife, Jo Carole, gave $1.25 million to Fix the City in recent months.

Lauder, a Republican and the president of the World Jewish Congress, has long been a financial supporter of Cuomo.

Mamdani has publicly named Lauder, along with Ackman, when decrying the influence of billionaires.

"Billionaires like Bill Ackman and Ronald Lauder have poured millions of dollars into this race because they say that we pose an existential threat," Mamdani said at an October rally. "And I am here to admit something. They are right. We are an existential threat to billionaires who think their money can buy our democracy."

Lauder is worth $4.9 billion, according to Forbes.

William Lauder, the chairman of the board of the Estée Lauder Companies and the nephew of Ronald Lauder, has given $500,000 to Fix the City since June.

That's in addition to the $500,000 he had already given to the group before the primary.

Lauder is worth $1.6 billion, according to Forbes.

Steve Wynn, a casino mogul and real estate developer, gave $500,000 to Fix the City in October.

Wynn is a longtime GOP mega-donor and the onetime financial chair of the Republican National Committee.

He is worth $3.9 billion, according to Forbes.

Daniel Loeb, the founder and CEO of New York-based firm Third Point, has given a total of $350,000 since the primary — $100,000 to Defend NYC and $250,000 to Fix the City.

Loeb also gave $250,000 to Fix the City before the primary.

He is worth $3.8 billion, according to Forbes.

Barry Diller, a media mogul who's the chairman of Expedia Group and IAC, donated $250,000 to Fix the City on October 22.

This is on top of a $250,000 donation he made to the pro-Cuomo group before the June primary.

Diller is worth $5 billion, according to Forbes.

Marcella Guarino Hymowitz gave $250,000 to Put NYC First in October. Prior to the primary, she had donated $150,000 to Fix the City.

Guarino Hymowitz's husband, asset manager Gregg Hymowitz, is worth $2 billion, per Forbes. In September, The New York Times reported that he was among the organizers of a meeting of business leaders focused on defeating Mamdani.

Richard Kurtz, a real estate mogul who lives in Palm Beach, Florida, donated $100,000 to Anyone But Mamdani.

The CEO of Kamson Corporation, which owns properties nationwide, is worth $1 billion, according to Forbes.

Laurie Tisch, a billionaire philanthropist, gave $100,000 to Fix the City in October. She had already given $50,000 to the group prior to the primary.

She is a member of the Tisch family, whose wealth comes from the Loews Corporation. Other members of the Tisch family have given to the group, totaling over $1.3 million for the year.

Laurie Tisch is worth $1.6 billion, according to Forbes. The family as a whole is worth an estimated $10.1 billion.

Alice Walton, a billionaire philanthropist and a member of the family that founded Walmart, gave $100,000 to Fix the City in August. She had previously given $100,000 to the same group in April, before the primary.

Walton is worth $111 billion, according to Forbes.