fundraise receipt · ai
frontrun flagged reactor 76 days before its $59M round
tl;dr: reactor announced $59M on May 28, 2026, led by Lightspeed Venture Partners. frontrun flagged the company on Mar 13, 2026, when it had 603 followers, 76 days before the announcement.
what reactor raised
reactor (@reactorworld · reactor.inc) announced $59M on May 28, 2026, led by Lightspeed Venture Partners, with participation from WndrCo, NVentures, Amplify Partners, Sky9 Capital, FPV Ventures. verified against reactor.inc.
Building the developer platform for real-time world models.
how we knew 76 days early
frontrun watches the follow graphs of 1,000+ tracked venture investors on X. on Mar 13, 2026, tracked investors began following reactor, which had 603 followers at the time. that convergence was logged that day. the round landed 76 days later.
41 tracked investors follow reactor today, and the account has grown to 4,304 followers. that count is public. which investors they are, and the day each one followed, is what the product shows.
reactor already raised. see the companies getting the same investor convergence right now, before their round. start a 7-day free trial →
other rounds we called early
KAST $80M (77d early) · Augustus $180M (71d early) · Traysar Industries $25M (82d early) · CRSHMARKET $1M (70d early) · noetik_ai $50M (84d early)
data updated Jul 27, 2026 · reactor signal page · every round we called early · trending this week