C3IS Inc.'s board of directors has approved a one-for-five (1-for-5) reverse stock split of its common stock, par value $0.01 per share. The split will take effect at 11:59 pm Eastern Time on November 8, 2026, with split-adjusted trading beginning on the Nasdaq Capital Market on November 9, 2026. This action aims to increase the market price of the common stock and satisfy Nasdaq's minimum bid price requirement for continued listing compliance. The transaction will reduce outstanding shares from approximately 4.2 million to 0.84 million. Outstanding warrants and Series A Convertible Preferred Stock will be proportionately adjusted, with fractional share holders receiving cash payments in lieu of fractions. C3IS Inc. is a debt-free ship-owning company providing dry bulk and crude oil seaborne transportation services.