X0202 SCHEDULE 13G/A 0001166573-26-000001 0001166573 XXXXXXXX LIVE 1 Common Stock 08/19/2026 0001951067 C3is Inc. Y18284300 331 KIFISSIAS AVENUE 331 KIFISSIAS AVENUE ATHENS J3 14561 Rule 13d-1(c) TOWERVIEW LLC C3is Inc. 331 KIFISSIAS AVENUE, 331 KIFISSIAS AVENUE, ATHENS, GREECE, 14561. N 0 0.0 Y N N N N N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. TOWERVIEW LLC Daniel R Tisch 10/02/2026