System1 (SST) is down -7.7%, or -47c to $5.57. Published first on TheFly – the ultimate source for real-time, market-moving breaking financial news. Try Now>> See today’s best-performing stocks on TipRanks >> Read More on SST: System1 files $250M Class A common stock offering System1 falls -6.0% System1 falls -11.9% System1 falls -6.8% System1 falls -14.0% Disclaimer & DisclosureReport an Issue