Former New York City Mayor Michael Bloomberg gained a new title. He became the biggest philanthropist of the year, donating $3 billion to support various causes throughout the world in 2023, according to the Chronicle of Philanthropy. 

The Chronicle of Philanthropy calculates an annual list of 50 Americans who donated the largest sums to nonprofits and there were several notable names – from Berkshire Hathaway's Warren Buffett to Home Depot co-founder Bernie Marcus, that made the list in 2023. 

In total, they contributed $11.9 billion to charity throughout the year.

On an individual basis, Bloomberg surpassed them all with his donations supporting the arts, education, environment and public health. He also donated to programs aimed at improving city governments around the world. 

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Still, Nike founder Phil Knight and his wife, Penny, weren't far behind. They donated $1.24 billion of their fortune to support the University of Oregon and an ambitious poverty-fighting effort in Portland. 

Dell CEO Micheal Dell and his wife, Susan, gave nearly $976 million to their charitable funds, which work to distribute the gifts to an array of charities.

According to the Bloomberg Billionaires Index, Dell's fortune surpassed $100 billion, bringing within the top 13 richest people in the world. Knight's fortune sits at just over $40 billion, according to the index. 

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Meanwhile, Buffet, who is the 7th wealthiest person in the world, according to the index, donated approximately $893 million to organizations. 

Philanthropist Melinda French Gates donated over $249 million to various charities, placing her at number nine on the list. Bill Gates donated over $173 million, placing him 16th on the list. 

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Priscilla Chan and Mark Zuckerberg gave over $94 million, putting them at number 28.

To calculate the list, the Chronicle talked to dozens of nonprofits, philanthropists, and their representatives about large donations that were made public last year, in addition to donors who gave quietly.

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It looks into the gifts and pledges of cash, stock, land, and real estate to nonprofit organizations in 2023. 

Since major donates are not required to publicly disclose the details about their giving, some major donors may not appear on this list, according to the Chronicle.