X0607 3 2026-03-18 0 0001341170 EUROSEAS LTD. ESEA 0002127484 Pittas Aristeidis P true 4 MESSOGEIOU & EVROPIS STREET MAROUSSI J3 151 24 1 1 0 0 Vice Chairman Common stock 22898 D Common stock 9972 I Friends Investment Ltd. Common stock 294469 I Containers Shareholders Trinity Ltd. Common stock 58050 I Family United Ltd. Common stock 71477 I Shares owned by wife through Family United and Friends Investment Ltd. Includes 4,650 shares of unvested incentive stock awards, of which 1,550 will vest on July 1, 2026, 1,550 shares will vest on November 13, 2026 and 1,550 shares will vest on July 1, 2027. Includes 9,972 shares of common stock held of record by Friends Investment Company Inc. by virtue of ownership interest in the above entities. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all the reported shares for purposes of Section 16 or for other purposes. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all the reported shares for purposes of Section 16 or for other purposes. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all the reported shares for purposes of Section 16 or for other purposes. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all the reported shares for purposes of Section 16 or for other purposes. Aristides P. Pittas 2026-04-07