UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 6-K
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO
RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of November 2025
Commission File Number: 001-41858
Okeanis Eco Tankers Corp.
(Translation of registrant’s name into English)
c/o OET
Chartering Inc., Ethnarchou Makariou Ave., & 2 D. Falireos St., 185 47 N. Faliro, Greece
(Address of principal executive office)
Indicate by check mark whether the registrant files or will
file annual reports under cover of Form 20-F or Form 40-F:
Form 20-F
x Form 40-F ¨
INFORMATION CONTAINED IN THIS
FORM 6-K REPORT
Attached
to this report on Form 6-K as Exhibit 99.1 is a copy of the press release published by Okeanis Eco Tankers Corp. on November 21,
2025, titled “Okeanis Eco Tankers Corp. – New Shares Issued and Commencement of Trading.”
This report on Form 6-K shall not constitute
an offer to sell or the solicitation of an offer to buy the securities discussed herein, nor shall there be any offer, solicitation, or
sale of the securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification
under the securities laws of any such state.
This report
on Form 6-K and the exhibits hereto are hereby incorporated by reference into the registrant’s registration statements:
(A) on Form F-3
(File No. 333-287032), filed with the Securities and Exchange Commission on May 7, 2025 and declared effective on May 21,
2025 and (B) on Form F-3 (File No. 333-287036), filed with the Securities and Exchange Commission on May 7,
2025 and declared effective on May 21, 2025.
SIGNATURES
Pursuant to the requirements of the
Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.
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Okeanis Eco Tankers Corp. |
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By: |
/s/ Iraklis Sbarounis |
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Name: |
Iraklis Sbarounis |
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Title: |
Chief Financial Officer |
Date: November 21,
2025
