Okeanis Eco Tankers Corp. – Key Information relating to Q3 2024 dividend

Okeanis Eco Tankers Corp. (“OET” or the “Company”) (NYSE: ECO / OSE: OET), announced that the Company’s board of directors (the “Board”) has declared a dividend on its common shares, which is classified as a return of capital for accounting purposes (the “Dividend”).

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

Since May 28, 2024, the New York Stock Exchange (“NYSE”) has been settling its trades on a T+1 basis, while the Oslo Stock Exchange (“OSE”) continues to settle 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 0.45 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: November 7, 2024.
• Last day including right OSE: November 14, 2024, 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: November 15, 2024, the last date on which the Company’s common shares trading on the NYSE will include the entitlement to the Dividend.
• Ex-date OSE: November 15, 2024, the date on which the Company’s common shares will begin trading on the OSE without the entitlement to the Dividend.
• Ex-date NYSE: November 18, 2024, 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: November 18, 2024
• Payment date: December 4, 2024. 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 December 9, 2024.

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.