River Markets

About

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.

Founders

• 
  Oscar Levy· Co-Founder

  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.

  LinkedIn ↗
• 
  Antonin Parrot· Founder

  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.

  LinkedIn ↗Twitter ↗

Product launches · 1 launch

• River Markets - The prime broker for prediction markets ↗▲ 14May 26, 2026

  River Markets allows funds and pro traders to focus on alpha by handling their execution and trading infrastructure

Change history · 2 recorded

1. June 8, 2026
   • Started hiring07:00 PM
2. May 26, 2026
   • New launch posted: River Markets - The prime broker for prediction markets05:44 AM