Icon Energy Corp美股招股说明书(2026-06-04版)

Icon Energy Corp. This prospectus supplement is being filed to update, amend and supplement the information contained in the prospectus datedMarch 13, 2026 (as supplemented or amended from time to time, the “Prospectus”), which forms a part of our Registration Statementon Form F-1 (Registration Statement No. 333-294110), with the information contained in our report on Form 6-K filed with theSecurities and Exchange Commission on June 3, 2026. The Prospectus relates to the sale from time to time of up to 9,811,933 common shares, par value $0.001 per share (“CommonShares”) of Icon Energy Corp., incorporated under the laws of the Marshall Islands, by YA II PN, Ltd., a Cayman Islands exemptlimited company. This prospectus supplement updates, amends and supplements the information in the Prospectus and is not complete without, andmay not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. Thisprospectus supplement should be read in conjunction with the Prospectus and if there is any inconsistency between the information inthe Prospectus and this prospectus supplement, you should rely on the information in this prospectus supplement. Our Common Shares are currently listed on The Nasdaq Capital Market under the symbol “ICON.” On June 3, 2026, the lastreported sales price of our Common Shares was $1.11 per share. Investing in our securities involves a high degree of risk. You should carefully review the risks and uncertainties describedin the section titled “Risk Factors” beginning on page 7 of the Prospectus, and under similar headings in any amendments orsupplements to the Prospectus. Neither the U.S. Securities and Exchange Commission nor any state securities commission has approved or disapproved ofthese securities or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation tothe contrary is a criminal offense. The date of this prospectus supplement is June 4, 2026. UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2026 Commission File Number: 001-42174 Icon Energy Corp.(Translation of registrant’s name into English) c/o Pavimar Shipping Co.17th km National RoadAthens-Lamia & Foinikos Str.14564, Nea KifissiaAthens, Greece+30 211 88 81 300(Address of principal executive office) Indicate by check mark whether the registrant files or will file annual reportsunder cover of Form 20-F or Form 40-F: Form 20-F☒Form 40-F☐ INFORMATION CONTAINED IN THIS FORM 6-K REPORT On June 3, 2026, Icon Energy Corp. (the “Company”) issued a press release entitled “Icon Energy Corp. ProvidesCommercial Update.” A copy of this press release is furnished asExhibit 99.1herewith. Notwithstanding the foregoing, the information in the press release regarding the Company’s commercial update isincorporated by reference into the Company’s registration statement on Form F-3 (File No. 333-291988), and shall be a part thereof, tothe extent not superseded by documents or reports subsequently filed or furnished. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed onits behalf by the undersigned, thereunto duly authorized. ICON ENERGY CORP. Date: June 3, 2026 By:/s/ Dennis PsachosName:Dennis PsachosTitle: Chief Financial Officer Icon Energy Corp. Provides Commercial Update Athens, Greece, June 3, 2026 (GLOBE NEWSWIRE)- Icon Energy Corp. (“Icon” or the “Company”) (Nasdaq: ICON), aninternational shipping company providing worldwide seaborne transportation services for dry bulk cargoes via its fleet of oceangoingvessels, provides a commercial update. Vessel Employment The M/VAlfais time chartered to an international commodity trading conglomerate for an indefinite period, expiring upon threemonths’ notice by either party but not earlier than July 2026. Under this charter, the vessel is earning hire at a floating daily rate linkedto the Baltic Panamax Index, while preserving the option to convert to a fixed hire rate, at a time and for a period of Icon’s choosing,thereby locking in forward earnings. Icon exercised such option and converted to a fixed hire rate for the seven-month period from June to December 2026, strengtheningearnings visibility and minimum contractual coverage through year-end. The hire rate for that period has been agreed at $18,000 perday, contributing approximately $3.7 million to Icon’s estimated minimum contracted revenue. The M/VBravoand the M/VCharliecontinue earning hire at floating daily rates, resulting in a charter portfolio that blends fixed andfloating rate exposure to provide cash flow stability and upside potential. Fleet Icon generates revenue by chartering its vessels to regional and international dry bulk operators, commodity traders and en