Top Billionaires and Their Giving in 2025
Warren Buffett remains the most prolific giver among billionaires, having donated over $56 billion of his Berkshire Hathaway shares to the Bill & Melinda Gates Foundation and other charities since 2006, with the bulk of the transfers still in progress as of the latest IRS filings. In 2025, he continues to direct the bulk of his annual giving to the Gates Foundation, which focuses on global health and poverty alleviation, according to the foundation's latest tax disclosures and public statements Forbes.
Elon Musk's giving surged in 2024 and 2025, driven by the sale of Tesla and SpaceX shares to fund the Musk Foundation. Public filings show the foundation donated roughly $300 million in 2024, with major grants to renewable energy research, space science education, and direct cash transfers to low-income households, as reported by the foundation's tax returns and SEC filings SEC EDGAR.
Major Philanthropic Foundations and Their Strategies
The Bill & Melinda Gates Foundation remains the world's largest private foundation by asset size, with an endowment exceeding $75 billion, and it continues to disburse billions annually for global health, education, and poverty programs. In 2025, the foundation announced a new five-year strategy focused on pandemic preparedness, agricultural productivity in sub-Saharan Africa, and U.S. education reform, according to its latest annual letter and grant database Gates Foundation.
Open Philanthropy and Effective Altruism
Open Philanthropy, a collaboration between Dustin Moskovitz and Cari Tuna, has emerged as a top-tier funmaker for high-impact causes, with over $2 billion in cumulative grants as of 2025. The organization uses cost-effectiveness analysis to direct money toward pandemic preparedness, AI safety research, and global health interventions, publishing detailed grant lists and impact reports on its website Open Philanthropy.
How the Wealthy Structure Charitable Giving
Donor-advised funds remain the dominant vehicle for large charitable gifts, with Fidelity Charitable, Schwab Charitable, and Vanguard Charitable holding record assets in 2025 as wealthy donors contribute appreciated stock and receive immediate tax deductions. These accounts allow donors to recommend grants over time, and the IRS requires public disclosure of grants over $5,000, creating a searchable record of billionaire giving IRS.gov.
Direct Private Foundations vs. Donor-Advised Funds
Private foundations offer more control and naming rights but require annual payout rules and excise taxes, while donor-advised funds provide simplicity, lower fees, and immediate tax benefits without the ongoing compliance burden. In 2025, the IRS data shows donor-advised funds account for a growing share of large charitable contributions from the ultra-wealthy, as more billionaires use these accounts to streamline their giving strategies