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Chestnut Forty: Funding, Team & Investors | Startup Intros

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Chestnut Forty

Chestnut Forty: The AI forecasting company for global macro events.

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Updated: Apr 13, 2026 ·

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Quick Facts

Type: Startup
Status: Active
Founded: 2025
Employees: 1-10
IPO Status: Private

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About

Chestnut Forty is a Y Combinator-backed company that the AI forecasting company for global macro events. The company participated in the Summer 2025 batch of Y Combinator.

We build forecasting agents for global macro events.

Chestnut Forty was part of Y Combinator's Summer 2025 cohort, has a team of approximately 1 employees, and is actively operating.

Deep Dive

Sources

ycombinator.com/companies/chestnut-forty

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