Okeanis Eco Tankers (ECO) files manager share trade notice in 6-K report

Rhea-AI Filing Summary

Okeanis Eco Tankers Corp. submitted a report describing a mandatory notification of trade related to shares purchased by a person discharging managerial responsibilities, originally published on January 9, 2026. The notification was made in line with European market abuse rules and the Norwegian Securities Trading Act, indicating that an insider-related share transaction has been formally disclosed to the market. The report also states that this information is incorporated by reference into the company’s two existing Form F-3 registration statements that were declared effective on May 21, 2025, allowing it to form part of the disclosure package for potential future securities offerings under those shelves.

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 January 2026

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 and Exhibit 99.2 are copies of the mandatory notification of trade with respect to shares purchased by a person discharging managerial responsibilities, published by Okeanis Eco Tankers Corp. on January 9, 2026. This notification has been publicly disclosed in accordance with article 19 number 3 of Regulation EU 596/2014 (MAR) and section 5-12 of the Norwegian Securities Trading Act.

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: January 9, 2026

FAQ

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

Okeanis Eco Tankers Corp. reports a mandatory notification of trade covering shares purchased by a person discharging managerial responsibilities. The notification was published on January 9, 2026 and made public in accordance with European market abuse regulation and the Norwegian Securities Trading Act.

Who is involved in the share transaction mentioned by Okeanis Eco Tankers Corp. (ECO)?

The transaction involves a person discharging managerial responsibilities at Okeanis Eco Tankers Corp., meaning an individual in a senior management or similar role whose trades must be disclosed under applicable regulations.

Why is this insider trade notification important for Okeanis Eco Tankers Corp. (ECO) investors?

The notification confirms that an insider-related share purchase has been disclosed under article 19 number 3 of Regulation EU 596/2014 (MAR) and section 5-12 of the Norwegian Securities Trading Act, providing transparency around trading by key managers of the company.

How does this 6-K relate to Okeanis Eco Tankers Corp.’s Form F-3 registration statements?

The report states that the notification of trade and its exhibits are incorporated by reference into Okeanis Eco Tankers Corp.’s two Form F-3 registration statements, both filed on May 7, 2025 and declared effective on May 21, 2025. This means the information becomes part of the disclosure record for potential securities offerings under those forms.

Which regulations govern the trade notification disclosed by Okeanis Eco Tankers Corp. (ECO)?

The trade notification has been publicly disclosed in accordance with article 19 number 3 of Regulation EU 596/2014 (MAR) and section 5-12 of the Norwegian Securities Trading Act, reflecting European and Norwegian securities law requirements on insider transactions.

Who signed the Okeanis Eco Tankers Corp. (ECO) report and in what capacity?

The report was signed by Iraklis Sbarounis, who is identified as the company’s Chief Financial Officer, indicating executive-level confirmation of the submission.