River Markets Raises $8.5M Seed Round to Build Prime Brokerage for Prediction Markets
River Markets has raised $8.5 million in seed funding led by Haun Ventures to build unified execution and risk infrastructure for professional prediction market traders.
River Markets has raised $8.5 million in a seed funding round led by Haun Ventures, four months after launching the company to build financial infrastructure for prediction markets.
The round also included participation from Y Combinator, Coinbase Ventures, UFO Holdings, Qube Research & Technologies, TENET, Humbition, Kima Ventures, Cherry Ventures, Stack Asset Management and Perpetual Strategies.
Individual investors included Mark Kornfilt and Novig co-founder Jacob Fortinsky, alongside angel investors from Citadel, Google, HRT, Tower Research Capital, NVIDIA, FalconX, Exodus Point and JPMorgan.
River Markets was founded by Oscar Levy and Antonin Parrot to address infrastructure challenges faced by professional prediction market traders operating across multiple venues.
According to the company, traders currently have to manage separate accounts, balances, APIs and risk systems across different prediction market platforms. Connecting to additional exchanges can also take months, while capital and execution remain fragmented between venues.
River Markets aims to address this by giving trading firms unified execution and risk management across prediction market venues through a single platform.
The company also provides execution algorithms designed to help traders execute larger positions while limiting slippage.
River Markets said it began working with trading teams on May 1. The company claims its users include several of the top 10 traders by volume on Kalshi and Polymarket, as well as prediction market hedge funds and proprietary trading firms.
Its execution and risk products are already live.
River Markets said its next phase will focus on building infrastructure and models aimed at helping trading firms use capital more efficiently and trade at greater scale.
The company is betting that continued growth in prediction markets will require more than improvements to consumer-facing trading products, with institutional trading infrastructure becoming another area of development as the sector expands.