River Markets
<!-- hacklab:yc-profile -- YC company profile Prime brokerage for prediction markets River Markets is the prime brokerage for prediction markets. We aggregate every major event-…
About River Markets
YC company profile
Prime brokerage for prediction markets
River Markets is the prime brokerage for prediction markets. We aggregate every major event-contract venue into one account, giving professional traders best execution, portfolio and order management systems, and a unified API.
- YC batch: Spring 2026
- Founded: 2026
- Team size: 2
- Location: San Francisco
- Country: US
- Status: Active
- Industry: Fintech
- Stage: Early
- YC partner: Harj Taggar
Founders
Oscar Levy — Founder/CEO
Co-Founder at River Markets. Previously quant at BlackRock managing models trading $6B, Sandbar Asset Management ($2B AUM hedge fund). MA Financial Engineering from UC Berkeley.
Antonin Parrot — Founder/CTO
Co-founder of River Markets, the prime broker for prediction markets. I have a background in engineering and CS, and I've been working as a quant at a high frequency option market making trading shop.
Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.