Antonin Parrot is Co-Founder of River Markets (YC P26), the prime brokerage infrastructure layer for prediction markets, offering best-price routing, cross-margin, and advanced execution algorithms across venues like Kalshi and Polymarket.

Antonin studied at Ecole des Ponts ParisTech, one of France's most prestigious Grandes Ecoles, and gained early capital markets experience as an intern in the Fixed Income e-trading division at Morgan Stanley.

Antonin has presented original prediction markets research at the Kalshi research conference, co-authored with Nicole Kagan and LinqAlpha, positioning himself as a thought leader in the emerging institutional prediction markets space.

At River Markets, Antonin co-founded the platform alongside Oscar Levy, targeting hedge funds, prop shops, and professional traders who need unified infrastructure to trade across fragmented prediction market venues.

River Markets has surpassed $50M traded on the platform and already powers hedge funds and 3 of the top 10 traders on both Kalshi and Polymarket, establishing itself as the go-to prime brokerage for serious prediction market participants.