Every round on record, with the sources behind each and the investors on them.
River Markets provides a trading platform for hedge funds and professional traders focused on prediction markets.
rivermarkets.comLinkedInSan FranciscoFintechYC X26Founded 20262 people
| Round | Amount | Announced | Lead | Buzz |
|---|---|---|---|---|
| Seed Verified against 4 sources | $8.5M | 2026-08-11 | Haun Ventures | No recent discussion |
[ VERIFIED · CORRECTED ]0.94 read against 4 sources
[ BUILT WITH ]·[ SEARCH ]found by corroboration·[ SCRAPE ]4 pages read: fortune.com, news.bettingstartups.com, axios.com | ||||
River Markets is an execution and portfolio-management platform that gives hedge funds, proprietary trading firms, and professional traders one terminal and API for trading across prediction-market venues.
Prediction-market trading is fragmented across venues with separate accounts, APIs, balances, and risk systems, so River's unified terminal/API and smart routing target the infrastructure gap that the founders say is holding back professional capital. Its $8.5 million seed led by Haun Ventures is funding faster, more secure systems and expansion of sales and operations while the company reports $50M+ traded, use by three of the top 10 traders on Kalshi and Polymarket, and a goal of hundreds of millions of dollars in annualized volume.
Checked against 10 sources today
Via Alexandria from FullEnrich: headcount, type, industry
Via Alexandria from ycombinator.com
Haun Ventures
Coinbase Ventures