<div id="readability-page-1"><div>ATHENS, GREECE, 21 January, 2026 - Okeanis Eco Tankers Corp. (the &#34;Company&#34; or&#34;OET&#34;) (NYSE: ECO, OSE: OET) is pleased to announce that it has successfullypriced an offering of 3,611,111 new shares of the Company's common stock, parvalue USD 0.001 per share (the &#34;Offer Shares&#34;), at a price of USD 36.00 perOffer Share, raising gross proceeds of approximately USD 130 million (the&#34;Offering&#34;).The net proceeds from the Offering are expected to be used as partialconsideration for the acquisition of two newbuilding Suezmax vessels (the&#34;Vessel Acquisitions&#34;), each currently under construction at DaehanShipbuildingCo., Ltd., a South Korean shipyard, each from an unrelated third-party seller,for an acquisition price of USD 99.3 million per vessel. Each vessel is asistervessel to the two vessels delivered in January 2026, and is expected to bedelivered from the shipyard during the second quarter of 2026, subject tosatisfaction of closing conditions for such delivery, including that theCompanyobtaining the necessary debt financing required to fully fund the VesselAcquisitions beyond equity raised in the Offering. If one or both of theVesselAcquisitions do not consummate, the net proceeds from the Offering may be usedfor general corporate purposes. The purchase of one vessel is not contingentonthe purchase of the other.Notification of allocation is expected to take place today, 21 January 2026,around 13:00 CET.The Offering is expected to be completed by delivery of the allocated OfferShares to investors through the Depository Trust Company (DTC) on a deliveryversus payment basis on or about 23 January 2026 (DVP, T+2), subject to thesatisfaction of customary closing conditions, including that the agreementsforthe Vessel Acquisitions remaining in full force and effect at the time ofclosing. The Offer Shares will be available for trading on New York StockExchange once the Offer Shares have been issued and settlement has taken placethrough the DTC, expected on or about 23 January 2026. After delivery of OfferShares, such shares may be transferred from DTC to Euronext Securities Oslo(the&#34;VPS&#34;) in accordance with the customary arrangements for transfers of theCompany's shares between DTC and VPS.The Company has considered the Offering in light of the equal treatmentobligations under the Norwegian Securities Trading Act Section 5-14, and theBoard is of the opinion that the Offering is in compliance with theserequirements.The Offering is being made pursuant to the Company's shelf registrationstatement on Form F-3 (File No. 333-287032), which was declared effective bytheU.S. Securities and Exchange Commission (the &#34;SEC&#34;) on 21 May 2025. TheOfferingis being made only by means of a prospectus supplement prepared specificallyinrelation to the Offering, which was filed with the SEC under Rule 424(b) underthe U.S Securities Act of 1933 and can be obtained at www.sec.gov. Electroniccopies of the prospectus supplement and related prospectus may also beobtainedby contacting Fearnley Securities AS at prospectus@fearnleys.com or ClarksonsSecurities AS at compliance.oslo@clarksons.com. A final prospectus supplementisexpected to filed with the SEC and made available at www.sec.gov.This announcement is for information purposes only and does not constitute orform part of an offer to sell or the solicitation of an offer to purchase orsubscribe for securities, nor will there be any sale of the securities in anyjurisdiction in which such offer, solicitation or sale would be unlawful priorto the registration or qualification under the securities laws of any suchjurisdiction. Any offers, solicitations or offers to buy, or any sales ofsecurities will be made in accordance with the registration requirements oftheSecurities Act of 1933, as amended.AdvisorsFearnley Securities AS and Clarksons Securities AS are acting as joint globalcoordinators and joint bookrunners for the Offering, and Pareto Securities ASisacting as joint bookrunner (collectively referred to as the &#34;Managers&#34;).Fearnley Securities AS is not a U.S. registered broker-dealer, and to theextentthat this offering is made within the United States, its activities will beeffected only to the extent permitted by Rule 15a-6 of the Securities ExchangeAct of 1934, as amended or through its affiliate Fearnley Securities Inc.Clarksons Securities AS is not a U.S. registered broker-dealer and to theextentthat this offering is made within the United States, its activities will beeffected only to the extent permitted by Rule 15a-6 of the Securities ExchangeAct of 1934, as amended or through its affiliate Clarksons Securities, Inc.Pareto Securities AS is not a U.S. registered broker-dealer, and to the extentthat this offering is made within the United States, its activities will beeffected only to the extent permitted by Rule 15a-6 of the Securities ExchangeAct of 1934, as amended or through its affiliate Pareto Securities Inc.Contacts Company:Iraklis Sbarounis, CFOTel: +30 210 480 4200ir@okeanisecotankers.com Investor Relations / Media Contact:Nicolas Bornozis, PresidentCapital Link, Inc.230 Park Avenue, Suite 1540, New York, N.Y. 10169Tel: +1 (212) 661-7566okeanisecotankers@capitallink.comThis information is considered to be inside information pursuant to Article 7ofthe EU Market Abuse Regulation and is subject to the disclosure requirementspursuant to Article 17 of the EU Market Abuse Regulation and Section 5-12 theNorwegian Securities Trading Act.This stock exchange release was published on the Oslo Stock Exchange by IreneChaidemenou, Legal Counsel, Okeanis Eco Tankers Corp., on the date and timeprovided.About OETOET is a leading international tanker company providing seabornetransportationof crude oil and refined products. The Company was incorporated on April 30,2018 under the laws of the Republic of the Marshall Islands and is listed onOslo Stock Exchange under the symbol OET and the New York Stock Exchange underthe symbol ECO. The sailing fleet consists of eight modern scrubber-fittedSuezmax tankers and eight modern scrubber-fitted VLCC tankers.Important informationThe information contained in this announcement is for background purposes onlyand does not purport to be full or complete. No reliance may be placed for anypurpose on the information contained in this announcement or its accuracy,fairness or completeness.Neither this announcement nor the information contained herein is forpublication, distribution or release, in whole or in part, directly orindirectly, in or into or from the Australia, Canada, Japan, Hong Kong, SouthAfrica or any other jurisdiction where to do so would constitute a violationofthe relevant laws of such jurisdiction. The publication, distribution orreleaseof this announcement may be restricted by law in certain jurisdictions andpersons into whose possession any document or other information referred toherein should inform themselves about and observe any such restriction. Anyfailure to comply with these restrictions may constitute a violation of thesecurities laws of any such jurisdiction.This announcement does not constitute an offer of securities for sale in theUnited States. Securities may not be offered or sold in the United Statesabsentregistration under the Securities Act of 1933, as amended, or an exemptionfromregistration. Any public offering of securities to be made in the UnitedStateswill be made by means of a prospectus that may be obtained from the Companyandthat will contain detailed information about the Company and management, aswellas financial statements.In any EEA Member State, this communication is only addressed to and is onlydirected at qualified investors in that Member State within the meaning of theEU Prospectus Regulation, i.e. only to investors who can receive the offerwithout an approved prospectus in such EEA Member State. The expression &#34;EUProspectus Regulation&#34; means Regulation (EU) 2017/1129 of the EuropeanParliament and of the Council of 14 June 2017 (together with any applicableimplementing measures in any Member State).This communication is only being distributed to and is only directed atpersonsin the United Kingdom that are &#34;qualified investors&#34; within the meaning of theEU Prospectus Regulation as it forms part of English law by virtue of theEuropean Union (Withdrawal) Act 2018 and that are (i) investment professionalsfalling within Article 19(5) of the Financial Services and Markets Act 2000(Financial Promotion) Order 2005, as amended (the &#34;Order&#34;) or (ii) high networth entities, and other persons to whom this announcement may lawfully becommunicated, falling within Article 49(2)(a) to (d) of the Order (all suchpersons together being referred to as &#34;relevant persons&#34;). This communicationmust not be acted on or relied on by persons who are not relevant persons. Anyinvestment or investment activity to which this communication relates isavailable only to relevant persons and will be engaged in only with relevantpersons. Persons distributing this communication must satisfy themselves thatitis lawful to do so.Forward-Looking StatementsThis communication contains &#34;forward-looking statements&#34;, including as definedunder applicable laws, such as the US Private Securities Litigation Reform Actof 1995. Forward-looking statements provide the Company's current expectationsor forecasts of future events. Forward-looking statements include statementsabout the Company's expectations, beliefs, plans, objectives, intentions,assumptions and other statements that are not historical facts or that are notpresent facts or conditions. Words or phrases such as &#34;anticipate,&#34; &#34;believe,&#34;&#34;continue,&#34; &#34;estimate,&#34; &#34;expect,&#34; &#34;hope,&#34; &#34;intend,&#34; &#34;may,&#34; &#34;ongoing,&#34; &#34;plan,&#34;&#34;potential,&#34; &#34;predict,&#34; &#34;project,&#34; &#34;should,&#34; &#34;will&#34; or similar words orphrases,or the negatives of those words or phrases, may identify forward-lookingstatements, but the absence of these words does not necessarily mean that astatement is not forward-looking. Forward-looking statements are subject toknown and unknown risks and uncertainties and are based on potentiallyinaccurate assumptions that could cause actual results to differ materiallyfromthose expected or implied by the forward-looking statements. The Company'sactual results could differ materially from those anticipated inforward-lookingstatements for many reasons, including as described in the Company's filingswith the SEC. Accordingly, you should not unduly rely on these forward-lookingstatements, which speak only as of the date of this communication. Factorsthatcould cause actual results to differ materially include, but are not limitedto,the Company's operating or financial results; the Company's liquidity,includingits ability to service its indebtedness; competitive factors in the market inwhich the Company operates; shipping industry trends, including charter rates,vessel values and factors affecting vessel supply and demand; future, pendingorrecent acquisitions and dispositions, business strategy, areas of possibleexpansion or contraction, and expected capital spending or operating expenses;risks associated with operations; broader market impacts arising from war (orthreatened war) or international hostilities; risks associated with pandemics,including effects on demand for oil and other products transported by tankersand the transportation thereof; and other factors listed from time to time inthe Company's filings with the SEC. Except to the extent required by law, theCompany expressly disclaims any obligations or undertaking to release publiclyany updates or revisions to any forward-looking statements contained herein toreflect any change in the Company's expectations with respect thereto or anychange in events, conditions, or circumstances on which any statement isbased.You should, however, review the factors and risks the Company describes in thereports it files and furnishes from time to time with the SEC, which can beobtained free of charge on the SEC's website at www.sec.gov.https://newsweb.oslobors.no/message/663970</div></div>

Okeanis Eco Tankers Corp. has completed a USD 130 million offering of 3,611,111 new common shares at USD 36.00 each. The proceeds will partially fund the acquisition of two newbuilding Suezmax vessels, each priced at USD 99.3 million. The offering is expected to close on or about January 23, 2026, with shares available for trading on the NYSE thereafter. The company is compliant with Norwegian Securities Trading Act requirements and has engaged Fearnley Securities AS and Clarksons Securities AS as joint global coordinators for the offering.

Okeanis Eco Tankers Corp. - Completion and pricing of USD 130 million offering of new common shares