fundraise receipt · prediction markets
frontrun flagged River Markets 117 days before its $8.5M seed round
tl;dr: River Markets announced $8.5M seed on Aug 9, 2026, led by Haun Ventures. frontrun flagged the company on Apr 14, 2026, when it had 421 followers, 117 days before the announcement.
what River Markets raised
River Markets (@river_markets · rivermarkets.com) announced $8.5M seed on Aug 9, 2026, led by Haun Ventures, with participation from Y Combinator, Coinbase Ventures, UFO Holdings, Qube Research & Technologies (QRT), TENET, Humbition, Kima Ventures, Cherry Ventures, Stack Asset Management, Perpetual Strategies, Mark Kornfilt, Jacob Fortinsky, Novig. verified against rivermarkets.com.
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how we knew 117 days early
frontrun watches the follow graphs of 2,000+ tracked venture investors on X. on Apr 14, 2026, tracked investors began following River Markets, which had 421 followers at the time. that convergence was logged that day. the round landed 117 days later.
31 tracked investors follow River Markets today, and the account has grown to 1,100 followers. that count is public. which investors they are, and the day each one followed, is what the product shows.
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other rounds we called early
Polsia $30M (120d early) · Deeptune $43M (112d early) · Clouted $7M (128d early) · Commissioned $200K (106d early) · Tornyol $4M (105d early)
data updated Sep 9, 2026 · River Markets signal page · every round we called early · trending this week