Jane Street Capital is a quantitative trading firm and liquidity provider that employs sophisticated algorithms and high-frequency trading to profit from market inefficiencies and provide liquidity across various asset classes. The firm's strategy involves proprietary trading of its own capital, focusing on areas like ETFs, commodities, fixed income, and options, while also exploring investments in emerging technologies such as blockchain, decentralized finance (DeFi), and AI.
32% of their portfolio is in AI. Deal activity increased 40% year-over-year (7 deals in the last 12 months). Average disclosed round size is $679.7M (across 21 rounds with reported amounts).
Portfolio
25
Fund Size
$58.5B
Top Stage
Series C
Last 12 Mo
7
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
Portfolio
| Company | Round | Amount | Date |
|---|---|---|---|
 MatX | Series C | $500M | Feb 2026 |
 Oxide Computer Company | Series C | $200M | Feb 2026 |
| Oxide Computer Company | Series C | $200M | Feb 2026 |
 Antithesis | Series A | $105M | Dec 2025 |
 X-energy | Series D | $700M | Nov 2025 |
| EEdgeCortix Inc. | Series B | — | Nov 2025 |
 Thinking Machines Lab | Seed | $2B | Jul 2025 |
 Anthropic | Series E | $3.5B | Mar 2025 |
| X-energy | Series C | $700M | Feb 2025 |
| X-energy | Series C | $200M | Feb 2025 |
 Magic | Growth | $320M | Aug 2024 |
 CoreWeave | Series C | $1.1B | May 2024 |
| CoreWeave | Unknown | — | Dec 2023 |
 ZetaChain | Series A | $27M | Aug 2023 |
 MultiLynq | Unknown | — | Mar 2023 |
 Kaito | Seed | $5.3M | Feb 2023 |
 Cera Care | Growth | $310M | Aug 2022 |
 Cera | Growth | $320M | Aug 2022 |
 1inch | Series B | $175M | Dec 2021 |
| XX-Energy Reactor Company, LLC | Series C | $700M | — |
| X-energy | Unknown | — | — |
| Magic | Growth | $200M | — |
| CoreWeave | Growth | $2B | — |
| Thinking Machines Lab | Growth | $1B | — |
 Submer | Series A | $12M | — |
Top Co-Investors
Last updated: 10 April 2026