<div id="readability-page-1"><div>NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY ORINDIRECTLY, IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA OR JAPAN, OR ANYOTHER JURISDICTION IN WHICH THE RELEASE, PUBLICATION OR DISTRIBUTION WOULD BEUNLAWFUL. THIS ANNOUNCEMENT DOES NOT CONSTITUTE AN OFFER OF ANY OF THESECURITIES DESCRIBED HEREIN.ATHENS, GREECE, 20 January 2026 - Okeanis Eco Tankers Corp. (together with itssubsidiaries, unless context otherwise dictates, &#34;OET&#34; or the &#34;Company&#34;)(NYSE:ECO, OSE: OET) today announces a contemplated acquisition of two Suezmaxtankernewbuilding resales (the &#34;Vessel Acquisitions&#34;), and a contemplated offeringofnew common shares (the &#34;Offering&#34;).The completion of the Vessel Acquisitions are subject to completion of theOffering, as further described below.The Vessel Acquisitions The Company has entered into two memoranda of agreement, whereby the Company,pursuant to each individual memorandum of agreement, has agreed to purchaseonenewbuilding Suezmax vessel (with an estimated approximate deadweight tonnageof157,000), currently under construction at Daehan Shipbuilding Co., Ltd., aSouthKorean shipyard, being sister vessels to two vessels acquired during January2026, each from an unrelated third-party seller for an acquisition price ofUSD99.3 million per vessel. Each vessel is expected to be delivered from theshipyard in the second quarter of 2026. Each of the Vessel Acquisitions is contingent on, among other things, theCompany raising sufficient capital to fund a portion of the purchase pricethrough the Offering, as well as the Company obtaining the necessary debtfinancing required to fully fund the Vessel Acquisitions beyond equity raisedinthe Offering, but the purchase of one vessel is not contingent on the purchaseof the other.The OfferingIn connection with the Vessel Acquisitions, the Company is contemplating anoffering of new common shares (the &#34;Offer Shares&#34;) to raise gross proceeds ofapproximately USD 115 million. The subscription price for the Offer Shares and the total number of OfferShareswill be determined by the Board of Directors of the Company (the &#34;Board&#34;) basedon an accelerated bookbuilding process.The net proceeds from the Offering are expected to be used to partly financetheconsideration to the sellers in the Vessel Acquisitions. However, if one orbothof the Vessel Acquisitions does not consummate, the net proceeds from theOffering may be used for general corporate purposes.The bookbuilding period for the Offering will commence today, 20 January 2026at22:15 CET and is expected to close on 21 January 2026 at 11:00 CET. TheCompanyreserves the right to at any time and in its sole discretion resolve to closeorto extend the application period or to cancel the Offering in part or inwhole.To facilitate an efficient bookbuilding process, a trading halt will beimposedon the Company's shares that are trading on Euronext Oslo Børs throughout thebookbuilding period and until final results have been announced, expected onorabout 13:00 CET on 21 January 2026.Notification of allocation is expected to take place on or about 21 January2026at 13:00 CET. Payment and delivery is expected to take place on 23 January2026based on delivery vs payment (DVP, T+2). The Offer Shares will be deliveredthrough the DTC. The Offer Shares will be available for trading on New YorkStock Exchange once the Offer Shares have been issued and settlement has takenplace through the DTC, expected on 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 minimum application and allocation amount has been set to the USDequivalentof EUR 100,000. The Board may however, at its sole discretion, allocate OfferShares for amounts below the USD equivalent of EUR 100,000 to the extentexemptions from the prospectus requirement in accordance with applicableregulations, including the Norwegian Securities Trading Act and ancillaryregulations, are available.Completion of the Offering by settlement of Offer Shares in the DepositoryTrustCompany (DTC) to investors in the Offering is subject to, among other things,(i) all corporate resolutions of the Company required to complete the Offeringbeing validly made, including without limitation, the Board or a committeethereof approving the allocation and issuance of Offer Shares; and (ii) theagreements for the Vessel Acquisitions remaining in full force and effect atthetime of settlement of the Offer Shares. The Offering will be cancelled if theconditions are not fulfilled and may be cancelled by the Company in its solediscretion for any other reason.Completion of the Offering is not conditional upon completion of the VesselAcquisitions. The Company has entered into agreements with respect to theVessels Acquisitions and expects such Vessel Acquisitions to be completed inaccordance with those agreements subject to and following completion of theOffering, as well as the Company obtaining the necessary debt financingrequiredto fully fund the vessels beyond equity raised in the Offering. The Offering will be made pursuant to the Company's shelf registrationstatementon Form F-3 (File No. 333-287032), which was declared effective by the U.S.Securities and Exchange Commission (the &#34;SEC&#34;) on 21 May 2025, and is beingmadeby means of a prospectus supplement prepared specifically in relation to theOffering and to be filed under Rule 424(b) under the U.S. Securities Act of1933, which can be obtained at www.sec.gov. A written prospectus may also beobtained by contacting Fearnley Securities AS at prospectus@fearnleys.com,Clarksons Securities AS at compliance.oslo@clarksons.com or Pareto SecuritiesASat subscription@paretosec.com.The Company will announce the results of the Offering, the number of OfferShares allocated in the Offering and the subscription price for the OfferSharesthrough an announcement expected to be published on or about 12:45 CET on 21January 2026.The shareholders of the Company will not have preferential rights to subscribefor new shares in the Offering. The Board has considered the Offering in lightof the rules of equal treatment set out in the Norwegian Securities TradingActsection 5-14. The Board is of the opinion that the Offering will reduceexecution and completion risk as it, amongst other things, allow for theCompanyto raise capital more quickly, and is more flexible, especially consideringtheOffering being part of a larger transaction comprising the Vessel Acquisitionsand that the shares of the Company are traded on both the New York StockExchange and Euronext Oslo Børs. Furthermore, the Board is of the opinionthat,in the current market, the Offering enables the Company to raise equity at alower discount compared to a rights issue. It has also been taken intoconsideration that the Offering is based on a publicly announced acceleratedbookbuilding process and that the Company has applied for a trading halt onEuronext Oslo Børs (as described above) to facilitate participation ofinvestorstrading on the Euronext Oslo Børs. On this basis, the Board has concluded thatthe Offering is in the interest of the Company and its shareholders and is incompliance with the requirements relating to equal treatment as set out in theNorwegian Securities Trading Act section 5-14.AdvisorsFearnley Securities AS and Clarksons Securities AS are acting as joint globalcoordinators and joint bookrunners, and Pareto Securities AS is acting asjointbookrunner, in the Offering (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.Advokatfirmaet BAHR AS is acting as Norwegian legal counsel, and Watson Farley&amp;Williams LLP is acting as US legal counsel, to the Company. AdvokatfirmaetThommessen AS is acting as Norwegian legal counsel, and Seward &amp; Kissel LLP isacting as US legal counsel, to the Managers.This announcement does not constitute an offer of any of the securitiesdescribed herein.ContactsCompany: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.com This 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 by Irene Chaidemenou, Legal Counsel,Okeanis Eco Tankers Corp., on the time and date provided.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 NoteThe 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 United States (including its territoriesandpossessions, any State of the United States and the District of Columbia),Australia, Canada, Japan, Hong Kong, South Africa or any other jurisdictionwhere to do so would constitute a violation of the relevant laws of suchjurisdiction. The publication, distribution or release of this announcementmaybe restricted by law in certain jurisdictions and persons into whosepossessionany document or other information referred to herein should inform themselvesabout and observe any such restriction. Any failure to comply with theserestrictions may constitute a violation of the securities laws of any suchjurisdiction.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 onlyaddressed to and is only directed at qualified investors in that Member Statewithin the meaning of the EU Prospectus Regulation, i.e. only to investors whocan receive the offer without an approved prospectus in such EEA Member State.The expression &#34;EU Prospectus Regulation&#34; means Regulation (EU) 2017/1129 oftheEuropean Parliament and of the Council of 14 June 2017 (together with anyapplicable implementing 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.NO ACTION HAS BEEN TAKEN BY THE COMPANY, THE MANAGERS OR ANY OF THEIRRESPECTIVEAFFILIATES THAT WOULD PERMIT AN OFFERING OF THE OFFER SHARES OR POSSESSION ORDISTRIBUTION OF THIS PRESS RELEASE OR ANY OFFERING OR PUBLICITY MATERIALRELATING TO THE OFFER SHARES IN ANY JURISDICTION WHERE ACTION FOR THAT PURPOSEIS REQUIRED. PERSONS INTO WHOSE POSSESSION THIS PRESS RELEASE COMES AREREQUIREDBY THE COMPANY AND THE MANAGERS TO INFORM THEMSELVES ABOUT, AND TO OBSERVE,ANYSUCH RESTRICTIONS.EACH PROSPECTIVE INVESTOR SHOULD PROCEED ON THE ASSUMPTION THAT IT MUST BEARTHEECONOMIC RISK OF AN INVESTMENT IN THE OFFER SHARES. NONE OF THE COMPANY OR THEMANAGERS MAKE ANY REPRESENTATION AS TO (I) THE SUITABILITY OF THE OFFER SHARESFOR ANY PARTICULAR INVESTOR, (II) THE APPROPRIATE ACCOUNTING TREATMENT ANDPOTENTIAL TAX CONSEQUENCES OF INVESTING IN THE OFFER SHARES OR (III) THEFUTUREPERFORMANCE OF THE OFFER SHARES EITHER IN ABSOLUTE TERMS OR RELATIVE TOCOMPETING INVESTMENTS.THE MANAGERS ARE ACTING ON BEHALF OF THE COMPANY AND NO ONE ELSE IN CONNECTIONWITH THE OFFERING AND WILL NOT BE RESPONSIBLE TO ANY OTHER PERSON FORPROVIDINGTHE PROTECTIONS AFFORDED TO CLIENTS OF THE MANAGERS OR FOR PROVIDING ADVICE INRELATION TO THE OFFER SHARES.EACH OF THE COMPANY, THE MANAGERS AND THEIR RESPECTIVE AFFILIATES EXPRESSLYDISCLAIMS ANY OBLIGATION OR UNDERTAKING TO UPDATE, REVIEW OR REVISE ANYSTATEMENT CONTAINED IN THIS PRESS RELEASE WHETHER AS A RESULT OF NEWINFORMATION, FUTURE DEVELOPMENTS OR OTHERWISE.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 is based.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/663930</div></div>

Okeanis Eco Tankers Corp. announced plans to acquire two Suezmax vessels for $99.3 million each, contingent on a $115 million offering of new common shares. The offering aims to raise funds for the acquisitions, with a bookbuilding period starting January 20, 2026, and closing January 21, 2026. The vessels are expected to be delivered in Q2 2026. The offering is subject to corporate resolutions and the fulfillment of acquisition agreements. Shares will be available for trading on the NYSE post-settlement.

Okeanis Eco Tankers Corp. - Agreements to acquire vessels and contemplated USD 115 million offering of new common shares