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Sam Altman
Venture investments (Hydrazine Capital funds, Reddit, Stripe, Helion Energy); no equity in OpenAI · United States
Average given per year
Not enough complete years with sourced data yet to calculate a rate.
Net worth, start of 2026 $2 B
Net worth, start of 2026
- Net worth estimate Open source Archived copy pending
- Forbes Real-Time Billionaires: $2 B as of Dec 2025 Open source Archived copy pending
- Forbes Real-Time Billionaires: $3.3 B as of Apr 2026 Open source Archived copy pending
Estimate from a published billionaires index, recorded by hand with its source.
Given $0
Paid out, no complete years yet
Promised 50% of wealth Giving Pledge, jointly with husband Oliver Mulherin, 2024. Not counted
Given each year
Share of net worth at the start of each year. Each date opens the sources.
- 2025 0%
Sources for 2025
- Net worth estimate Open source Archived copy pending
2025: $0 given ÷ $1.2 B net worth at the start of the year = 0%.
Full breakdown by giving type
| Giving type | |
|---|---|
| Open pledges and commitments Promised · not counted | 50% of wealth |
Transfers into a person's own foundation or a donor-advised fund are parked, not given: only grants paid out to charities count. Political gifts are outside what this site measures. How giving types work
Pledges
- 2015 Personal donation of $10M to start YC Research (later OpenResearch).
Status: Open (fulfilment not documented; the lab reported $1M of donations in 2016 and Altman funded it mainly through loans)
Pledge source
- Personal donation of $10M to start YC Research (later OpenResearch). Open source Archived copy pending
- 18 May 2024 Giving Pledge, jointly with husband Oliver Mulherin: more than half of their wealth to philanthropy during their lifetimes or in their wills, focused on technology that creates abundance.
Status: Open · Joint pledge with spouse
Pledge source
- Giving Pledge, jointly with husband Oliver Mulherin: more than half of their wealth to phi… Open source Archived copy pending