Two Sigma
 | |
 Headquarters at 100 Avenue of the Americas | |
| Type | Private |
|---|---|
| Industry | Hedge fund |
| Founded | 2001 |
| Founders |
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| Headquarters | New York City, U.S. |
| Products | Hedge fund |
| AUM | US$70 billion (2025) |
Number of employees | c. 2,000 (2026) |
| Website | twosigma |
Two Sigma Investments, LP is an American hedge fund headquartered in New York City. It uses a variety of technological methods, including artificial intelligence, machine learning, and distributed computing, for its trading strategies. The firm was run by John Overdeck and David Siegel until August 2024.
Since September 30, 2024, Two Sigma has been led by co-CEOs Carter Lyons and Scott Hoffman, while founders John Overdeck and David Siegel remain co-chairmen.