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 December 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 December 19, 2025, titled “Okeanis Eco Tankers Corp. – Financial
Calendar.”
This report
on Form 6-K (including the exhibit thereto) contains “forward-looking statements”, including as defined under U.S. federal
securities laws. Forward-looking statements provide Okeanis Eco Tankers Corp.’s (the “Company”) current expectations
or forecasts of future events. Forward-looking statements include statements about the Company’s expectations, beliefs, plans, objectives,
intentions, assumptions and other statements that are not historical facts or that are not present facts or conditions. Words or phrases
such as “anticipate,” “believe,” “continue,” “estimate,” “expect,” “hope,”
“intend,” “may,” “ongoing,” “plan,” “potential,” “predict,” “project,”
“should,” “will” or similar words or phrases, or the negatives of those words or phrases, may identify forward-looking
statements, but the absence of these words does not necessarily mean that a statement is not forward-looking. Forward-looking statements
are subject to known and unknown risks and uncertainties and are based on potentially inaccurate assumptions that could cause actual results
to differ materially from those expected or implied by the forward-looking statements. The Company’s actual results could differ
materially from those anticipated in forward-looking statements for many reasons, including as described in the Company’s filings
with the U.S. Securities and Exchange Commission (the “SEC”). Accordingly, you should not unduly rely on these forward-looking
statements, which speak only as of the date of this communication. Factors that could cause actual results to differ materially include,
but are not limited to, the Company’s operating or financial results; the Company’s liquidity, including its ability to service
its indebtedness; competitive factors in the market in which the Company operates; shipping industry trends, including charter rates,
vessel values and factors affecting vessel supply and demand; future, pending or recent acquisitions and dispositions, business strategy,
areas of possible expansion or contraction, and expected capital spending or operating expenses; risks associated with operations; broader
market impacts arising from war (or threatened war) or international hostilities; risks associated with pandemics, including effects on
demand for oil and other products transported by tankers and the transportation thereof; and other factors listed from time to time in
the Company’s filings with the SEC. Except to the extent required by law, the Company expressly disclaims any obligations or undertaking
to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in the Company’s
expectations with respect thereto or any change in events, conditions, or circumstances on which any statement is based. You should, however,
review the factors and risks the Company describes in the reports it files and furnishes from time to time with the SEC, which can be
obtained free of charge on the SEC’s website at www.sec.gov.
This Report and the exhibit(s) 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.
| Okeanis Eco Tankers
Corp. |
| |
By: |
/s/ Iraklis Sbarounis |
| |
Name: |
Iraklis Sbarounis |
| |
Title: |
Chief Financial Officer |
Date: December 19, 2025
