By Isnaini Azizah 
The landscape of American mega-giving reached a staggering milestone in 2025, as the nation’s 50 most generous donors collectively funneled $22.4 billion into charitable causes, according to the latest annual Philanthropy 50 ranking published by the Chronicle of Philanthropy. This massive influx of capital comes at a time of heightened economic complexity, where the rift between the ultra-wealthy and the broader public has never been more scrutinized. Leading the charge for the third consecutive year was media magnate and former New York City Mayor Michael Bloomberg, whose $4.3 billion in contributions underscored a sustained commitment to a diverse portfolio of social issues, ranging from public health initiatives to the arts.
Bloomberg’s dominance at the top of the list reflects a broader trend among the "old guard" of American billionaires who utilize highly structured, transparent philanthropic vehicles to enact change. His giving in 2025 was particularly focused on bolstering the infrastructure of public health, combating climate change, and supporting cultural institutions that serve as the bedrock of urban life. However, while Bloomberg’s name remains synonymous with public-facing generosity, the 2025 report highlights a growing tension in the world of high-net-worth giving: the rise of "stealth philanthropy" and the increasing difficulty of tracking where billionaire wealth is actually flowing.
Perhaps the most glaring omission from the Philanthropy 50 is MacKenzie Scott, the novelist and former wife of Amazon founder Jeff Bezos. Scott, who has revolutionized the nonprofit sector with her "no-strings-attached" approach to giving, announced in early December that she had distributed nearly $7.2 billion to approximately 225 organizations over the past year. Since 2020, her philanthropic vehicle, Yield Giving, has disbursed more than $26 billion to nonprofits. Despite these astronomical figures, which would easily place her near the top of any list, she was excluded from the Chronicle’s official ranking due to a technicality involving transparency and the mechanics of modern wealth management.
Maria Di Mento, a senior editor at the Chronicle of Philanthropy who has overseen the rankings for over two decades, explained that the exclusion stems from Scott’s refusal to confirm the specific amounts contributed to her donor-advised funds (DAFs). DAFs have become the weapon of choice for the ultra-wealthy seeking both tax advantages and privacy. They allow donors to set aside assets for future charitable use, receiving an immediate tax deduction, while the actual distribution of those funds to specific charities can happen years later—or remain entirely anonymous.
The Philanthropy 50 methodology counts donations made into DAFs and foundations to capture the moment wealth is legally committed to charity. However, it does not count the subsequent disbursements from those funds to avoid the "double counting" of the same dollar. Because Scott’s representatives declined to verify the new capital she moved into her DAFs in 2025, the Chronicle could not accurately place her on the list alongside peers like Bloomberg. This highlights a significant challenge for researchers and the public alike: as billionaires move toward more private giving structures, the true scale of American philanthropy becomes harder to measure.
The shift toward privacy is not merely a logistical hurdle; it is a symptom of a changing social climate. Di Mento noted that the ultra-wealthy are navigating an era of unprecedented public scrutiny. "I do think the desire for privacy has grown in recent years because the ultra-wealthy are under so much more scrutiny than they used to be," Di Mento observed. She pointed out that while a certain level of resentment toward the billionaire class has always existed, that sentiment has intensified significantly in the post-pandemic era, fueled by rising income inequality and political polarization.
Beyond the fear of public backlash, many philanthropists are motivated by a more practical concern: the desire to avoid being "bombarded" by major gift fundraisers. For many billionaires, a public listing on the Philanthropy 50 is essentially an open invitation for thousands of nonprofits to flood their offices with funding requests. Interestingly, many of these individuals do not maintain the massive administrative staffs one might expect, leaving them overwhelmed by the sheer volume of solicitations that follow a publicized gift. By keeping their giving quiet or utilizing DAFs, they can maintain control over their philanthropic strategy without the noise of unsolicited pitches.
This trend toward secrecy is further evidenced by the disconnect between the Chronicle’s Philanthropy 50 and the Forbes 400 list of the wealthiest Americans. In 2025, only 19 members of the Forbes 400 made the cut for the top 50 philanthropists. This means that more than 95% of the nation’s richest individuals did not give enough—or at least did not disclose enough—to be recognized as top-tier donors. High-profile centibillionaires like Elon Musk and Larry Ellison, who frequently jockey for the title of the world’s richest person, were notably absent from the ranking.
The case of Elon Musk illustrates the complexities of verifying billionaire benevolence. In late 2024, regulatory filings revealed that Musk gifted approximately 210,000 Tesla shares, valued at nearly $100 million, to "certain charities." However, because the recipients were not disclosed, and it could not be confirmed whether the funds went to 501(c)(3) nonprofits or toward more politically aligned 501(c)(4) organizations, the Chronicle could not include the gift in its tally. This lack of transparency has become a hallmark of Musk’s philanthropic profile, which often involves moving assets into his own private foundation rather than making public grants to established NGOs.
Similarly, Larry Ellison, the co-founder of Oracle, remains an enigmatic figure in the world of giving. Although Ellison signed the Giving Pledge in 2010—committing to donate at least 95% of his net worth—his representatives have ceased cooperating with the Chronicle for several years. In a notable shift in 2024, Ellison amended his pledge, suggesting a pivot away from traditional nonprofit support in favor of direct investment in technology research. This "philanthropic evolution" blurs the lines between charitable giving and venture capital, as Ellison argues that technological breakthroughs in areas like healthcare and artificial intelligence may do more to benefit humanity than traditional grant-making. "It’s not really clear what he’s giving to or what he’s giving anymore," Di Mento remarked, reflecting the frustration of those trying to track the impact of the world’s largest fortunes.
The 2025 data also sheds light on the sectors that are currently attracting the most attention from the ultra-wealthy. While education and healthcare remain the primary recipients of large-scale gifts, there is a growing interest in "trust-based philanthropy." This model, championed by MacKenzie Scott, prioritizes giving large, unrestricted grants to organizations that have historically been underfunded, such as those focusing on racial equity, LGBTQ+ rights, and community-led economic development. Unlike Bloomberg’s strategic approach, which often involves rigorous reporting requirements and specific project goals, Scott’s model assumes that the organizations on the ground know best how to use the funds.
This ideological divide—between the "strategic" philanthropy of the 20th century and the "trust-based" philanthropy of the 21st—is reshaping the nonprofit sector. Strategic donors like Bloomberg provide the stable, large-scale funding necessary for massive public health campaigns, such as his successful efforts to reduce tobacco use globally. On the other hand, the influx of unrestricted capital from donors like Scott allows smaller nonprofits to build their internal capacity, pay competitive wages, and pivot quickly to meet emerging community needs.
Despite the $22.4 billion headline figure, some critics argue that the ultra-wealthy are still not doing enough. With the total wealth of the Forbes 400 reaching record highs, the percentage of net worth dedicated to annual giving remains relatively low for many of the world’s richest people. Di Mento noted that while some billionaires may be giving anonymously, others simply aren’t prioritizing philanthropy at a scale commensurate with their assets. "I think a lot of the ultra-wealthy are not giving as much as they could be," she said, "but the other part is that there’s no law that says they have to disclose their giving."
The regulatory environment surrounding DAFs continues to be a point of contention among policy experts. Critics argue that DAFs allow billionaires to "warehouse" wealth, taking an immediate tax break while the money sits in investment accounts rather than being put to work in the community. Supporters, however, argue that DAFs encourage more giving by providing a flexible and private way for donors to manage their charitable legacies. As the 2025 rankings show, the tension between transparency and privacy will continue to define the future of American philanthropy.
As we look toward the remainder of the decade, the influence of the Philanthropy 50 will likely continue to grow, even as the methods of giving evolve. The $22.4 billion committed in 2025 represents a vital lifeline for thousands of organizations, but it also serves as a reminder of the immense power concentrated in the hands of a few individuals. Whether through Michael Bloomberg’s public health crusades or MacKenzie Scott’s quiet transformations of local nonprofits, the choices made by these 50 donors will continue to shape the social and cultural fabric of the United States for years to come. The challenge for the public, and for organizations like the Chronicle of Philanthropy, will be to keep pulling back the curtain on this increasingly private world of wealth and influence.