[6-K] Okeanis Eco Tankers Corp. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Okeanis Eco Tankers Corp. filed a Form 6-K announcing that it has issued a press release titled “Okeanis Eco Tankers Corp. – Agreements to acquire vessels and contemplated USD 100 million offering of new common shares.” The company indicates it is considering an equity offering of new common shares of up to USD 100 million, alongside agreements to acquire additional vessels, as described in the referenced press release. The Form 6-K also states that this information is incorporated by reference into two existing shelf registration statements on Form F-3, providing a framework under which any such equity issuance could be made.

Insights

Equity & Capital Markets Analyst

ECO signals potential $100M equity raise tied to vessel acquisitions.

Okeanis Eco Tankers Corp. reports that it has announced agreements to acquire vessels and a contemplated offering of new common shares of up to USD 100 million. The Form 6-K itself is largely administrative, pointing readers to a separate press release for commercial and financial details of the transactions.

The company also confirms that this disclosure is incorporated by reference into two effective shelf registration statements on Form F-3. This means any future issuance of new common shares connected to the contemplated offering can be executed under those existing frameworks, subject to market conditions and other factors described elsewhere.

The combination of vessel acquisition agreements and a potential USD 100 million common share issuance could be meaningful for fleet size, capital structure, and dilution, but the excerpt does not quantify these effects. Future company communications and filings would clarify terms such as pricing, number of shares, and closing details of both the acquisitions and any equity issuance.

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 18, 2025, titled “Okeanis Eco Tankers Corp. – Agreements to acquire vessels and contemplated USD 100 million offering of new common shares.”

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 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: November 18, 2025

FAQ

What did Okeanis Eco Tankers Corp. (ECO) announce in this Form 6-K?

Okeanis Eco Tankers Corp. reported that it has issued a press release titled “Okeanis Eco Tankers Corp. – Agreements to acquire vessels and contemplated USD 100 million offering of new common shares,” describing agreements to acquire vessels and a potential equity offering.

How large is the contemplated equity offering mentioned by ECO?

The company refers to a contemplated offering of new common shares of up to USD 100 million, as described in its referenced press release.

Does this Form 6-K by ECO constitute an offer to sell securities?

No. The company expressly states that this report does not constitute an offer to sell or a solicitation of an offer to buy the securities discussed, and that any offer would be made only under applicable securities laws.

How does this Form 6-K relate to ECO’s existing shelf registration statements?

The company states that this Form 6-K and its exhibit are incorporated by reference into its effective Form F-3 registration statements (File Nos. 333-287032 and 333-287036), allowing the disclosed matters to be covered under those shelves.

Who signed the Form 6-K for Okeanis Eco Tankers Corp.?

The report was signed on behalf of Okeanis Eco Tankers Corp. by Iraklis Sbarounis, the company’s Chief Financial Officer.

Does the Form 6-K provide details on the vessel acquisitions for ECO?

The Form 6-K notes that there are agreements to acquire vessels but does not provide terms; it refers investors to the attached press release for detailed information.