Okeanis Eco Tankers (NYSE: ECO) files 6-K on new share trading

Rhea-AI Filing Summary

Okeanis Eco Tankers Corp. submitted a Form 6-K as a foreign private issuer, mainly to furnish a press release titled “Okeanis Eco Tankers Corp. – New Shares Issued and Commencement of Trading,” dated November 21, 2025. The press release describes the issuance of new shares and the start of trading in those shares.

The report states that it is not an offer to sell or solicit an offer to buy any securities. It also incorporates this report and its exhibit by reference into the company’s two effective shelf registration statements on Form F-3, allowing the new information to be used within those existing offerings.

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Form 6-K: How Foreign Companies Report to the SEC →

Accepted by SEC EDGAR 11/21/2025 - 06:00 AM Learn about SEC filing dates

FAQ

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

The company furnishes a press release titled “Okeanis Eco Tankers Corp. – New Shares Issued and Commencement of Trading,” describing new shares issued and the start of their trading.

Does this Okeanis Eco Tankers (ECO) filing constitute an offer to sell securities?

No. The report explicitly states it does not constitute an offer to sell or a solicitation of an offer to buy the securities discussed.

How is this Form 6-K linked to Okeanis Eco Tankers’ F-3 registration statements?

The report and its exhibit are incorporated by reference into the company’s two effective shelf registration statements on Form F-3, identified by File Nos. 333-287032 and 333-287036.

What is the title of the press release attached to this Okeanis Eco Tankers (ECO) Form 6-K?

The attached press release is titled “Okeanis Eco Tankers Corp. – New Shares Issued and Commencement of Trading.”

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

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

What type of SEC annual report does Okeanis Eco Tankers Corp. file?

The company indicates that it files its annual reports under cover of Form 20-F.

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.

	Okeanis Eco Tankers Corp.
	By:	/s/ Iraklis Sbarounis
	Name:	Iraklis Sbarounis
	Title:	Chief Financial Officer

Date: November 21, 2025