Amendment No. 6 to Schedule 13D for C3is Inc.

Imperial Petroleum Inc. filed Amendment No. 6 to Schedule 13D regarding its ownership of common stock in C3is Inc. The amendment updates the number of shares beneficially owned by Imperial Petroleum due to changes in the conversion price of the Series A Convertible Preferred Stock, adjusted to $2.50 following a registered offering by C3is Inc. on October 9, 2025. The amendment also reflects dilution in percentage ownership based on the revised total number of outstanding shares. Harry N. Vafias, Chairman, CEO, and President of Imperial Petroleum, is the Non-Executive Chairman of C3is Inc. and beneficially owns 100,577 shares of common stock. Imperial Petroleum may acquire additional securities, retain, or sell shares based on various factors, including C3is Inc.'s business and market conditions.