BUZZ-Arcturus falls as cystic fibrosis drug shows no improvement in initial analysis

Reuters
2025.10.22 11:59
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Shares of Arcturus Therapeuticsfell 61.8% to $8.84 in premarket trading after an initial analysis of its experimental cystic fibrosis therapy showed no improvement in lung function at day 28. However, day 42 measurements indicated potential improvements. The company plans to start a 12-week safety and preliminary efficacy study in H1 2026. Prior to this news, the stock had risen 36.5% year-to-date.