Source
Notes
$1B pledged at founding by Elon Musk, Sam Altman, Greg Brockman, Reid Hoffman, Peter Thiel, Microsoft, Amazon Web Services, Infosys, and YC Research.
Other Rounds by OpenAI
6| Round | Raised | Valuation | Lead Investor | Date |
|---|---|---|---|---|
| Series (March 2025)(equity) | $40B | $300B | SoftBank | Mar 2025 |
| Series (October 2024)(equity) | $6.6B | $157B | Thrive Capital | Oct 2024 |
| Strategic Investment (Microsoft, 2023)(strategic) | $10B | Microsoft | Jan 2023 | |
| Series (2023) | $300M | $29B | 2023 | |
| Series (2021)(equity) | $1B | Jan 2021 | ||
| Strategic Investment (Microsoft)(strategic) | $1B | Microsoft | Jul 2019 |