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

Rhea-AI Filing Summary

Okeanis Eco Tankers Corp. filed a Form 6-K to furnish two press releases to investors. One press release reminds holders about the suspension of trading of the company’s shares on Euronext Oslo Børs. The other announces the completion and pricing of a USD 115 million offering of new common shares, indicating the company has recently raised equity capital. The filing also states that this Form 6-K and its exhibits are incorporated by reference into the company’s effective shelf registration statements on Form F-3.

Insights

Capital markets and disclosure analyst

Okeanis Eco Tankers reports a completed USD 115M equity offering.

Okeanis Eco Tankers Corp. uses this Form 6-K to formally inform U.S. investors about two corporate developments disclosed via press releases. One is a reminder that trading in its shares on Euronext Oslo Børs is suspended, which affects liquidity in that market. The other is the completion and pricing of a USD 115 million offering of new common shares, indicating an equity capital raise has been finalized.

The text also states that this 6-K and its exhibits are incorporated by reference into two effective shelf registration statements on Form F-3. That linkage means the new information becomes part of the company’s registered offering materials in the U.S., which is a standard step for ongoing access to capital markets. The ultimate impact for investors will depend on the detailed terms of the offering and how the new equity is used, as described in the referenced press releases and registration statements.

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 19, 2025, titled “Okeanis Eco Tankers Corp. – Reminder of trading suspension on Euronext Oslo Børs.”

Attached to this report on Form 6-K as Exhibit 99.2 is a copy of the press release published by Okeanis Eco Tankers Corp. on November 19, 2025, titled “Okeanis Eco Tankers Corp. – Completion and pricing of USD 115 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 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 19, 2025

FAQ

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

The Form 6-K from Okeanis Eco Tankers Corp. provides two press releases. One reminds investors about the suspension of trading on Euronext Oslo Børs. The other announces the completion and pricing of a USD 115 million offering of new common shares.

How large is the new share offering mentioned by Okeanis Eco Tankers (ECO)?

The company reports the completion and pricing of a USD 115 million offering of new common shares, as described in the attached press release labeled Exhibit 99.2.

What is the trading suspension referenced by Okeanis Eco Tankers in this filing?

One attached press release, titled “Okeanis Eco Tankers Corp. – Reminder of trading suspension on Euronext Oslo Børs”, reminds investors that trading of the company’s shares on Euronext Oslo Børs is suspended.

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

The Form 6-K states that the report and its exhibits are incorporated by reference into two Form F-3 registration statements, File Nos. 333-287032 and 333-287036, each filed on May 7, 2025 and declared effective on May 21, 2025.

Does this Okeanis Eco Tankers 6-K constitute an offer to sell securities?

No. The text explicitly states that this report does not constitute an offer to sell or the solicitation of an offer to buy the securities discussed, and that no such offer or sale will occur where it would be unlawful before proper registration or qualification.

Who signed the Okeanis Eco Tankers Corp. Form 6-K and in what capacity?

The Form 6-K is signed by Iraklis Sbarounis, who is identified as the company’s Chief Financial Officer, on behalf of the registrant.