Okeanis Eco Tankers Corp. – Key Information relating to Q4 2025 dividend

Okeanis Eco Tankers Corp. has announced that the Company’s board of directors (the “Board”) has declared a dividend on its common shares (the “Dividend”).

Due to implementation of the Central Securities Depository Regulation (“CSDR”) in Norway, shareholders who hold common shares registered in Euronext Securities Oslo (“VPS”), Norway’s central securities depository, should please note the information on the payment date to the common shares registered in VPS below.

The New York Stock Exchange (“NYSE”) settles its trades on a T+1 basis, while the Oslo Stock Exchange (“OSE”) settles its trades on a T+2 basis. As a result, there will be different ex-dividend dates between the two exchanges, as set out below.

Key information relating to the Dividend:
• Dividend amount: USD 1.55 per common share.
• Declared currency: USD. Dividends payable to common shares registered in the Euronext VPS will be distributed in NOK.
• Date of Board approval: February 18, 2026.
• Last day including right OSE: February 27, 2026, the last date on which the Company’s common shares trading on the OSE will include the entitlement to the Dividend.
• Last day including right NYSE: March 2, 2026, the last date on which the Company’s common shares trading on the NYSE will include the entitlement to the Dividend.
• Ex-date OSE: March 2, 2026, the date on which the Company’s common shares will begin trading on the OSE without the entitlement to the Dividend.
• Ex-date NYSE: March 3, 2026, the date on which the Company’s common shares will begin trading on the NYSE without the entitlement to the Dividend.
• Record date OSE and NYSE: March 3, 2026
• Payment date: March 10, 2026. Due to the implementation of CSDR in Norway, the Dividend payable on common shares that are registered in the Euronext VPS is expected to be distributed to Euronext VPS shareholders on or about March 13, 2026.

The Company encourages you to contact your bank, broker, nominee or other institution if you have any questions regarding the mechanics and timing of having the Dividend attributable to your common shares credited to your account.