约克自来水美股招股说明书(2026-04-15版)

TABLE OF CONTENTS The information in this preliminary prospectus supplement and the accompanying prospectusis not complete and may be changed. A registration statement relating to the securities hasbecome effective under the Securities Act of 1933, as amended. This preliminary prospectussupplement and the accompanying prospectus are not an offer to sell these securities and weare not soliciting offers to buy these securities in any jurisdiction where the offer or sale is notpermitted. Filed Pursuant to Rule424(b)(5)Registration Statement No. 333-283488 PROSPECTUS SUPPLEMENT(To Prospectus Dated December9, 2024) THE YORK WATER COMPANY Shares of Common Stock The York Water Company (“York Water” or the “Company”) is offeringshares of its common stock,no par value (“York Water Common Stock”). York Water Common Stock is listed on the Nasdaq Global Select Market under the symbol “YORW.” OnApril 14, 2026, the closing price of York Water Common Stock on the Nasdaq Global Select Market was $31.45per share. Investing in York Water Common Stock involves risks. See “Risk Factors” beginning on page S-7ofthis prospectus supplement, page3of the accompanying prospectus and in the documents we incorporateby reference in this prospectus supplement and the accompanying prospectus. (1)Assumes no exercise of the underwriter’s option to purchase additional shares, described below. The underwriter has an option, exercisable within 30 days after the date of this prospectus supplement, topurchase up toadditional shares of York Water Common Stock directly from us on the same terms setforth above. Neither the United States Securities and Exchange Commission nor any other regulatory body hasapproved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectussupplement or the related prospectus. Any representation to the contrary is a criminal offense. The underwriter expects to deliver the shares of York Water Common Stock to purchasers on or about April, 2026. Sole Book-Running ManagerHuntington Capital MarketsCo-ManagerSeaport Global Securities TABLE OF CONTENTS PROSPECTUS SUPPLEMENT PageABOUT THIS PROSPECTUS SUPPLEMENTS-iiCAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTSS-iiiPROSPECTUS SUPPLEMENT SUMMARYS-1RISK FACTORSS-7USE OF PROCEEDSS-15CAPITALIZATIONS-16MATERIAL UNITED STATES FEDERAL INCOME AND ESTATE TAX CONSIDERATIONS TO NON-U.S. HOLDERSS-17UNDERWRITINGS-21LEGAL MATTERSS-24EXPERTSS-24WHERE YOU CAN FIND MORE INFORMATIONS-24INCORPORATION OF CERTAIN INFORMATION BY REFERENCES-25 PROSPECTUS PageABOUT THIS PROSPECTUS1ABOUT THE YORK WATER COMPANY1CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS2RISK FACTORS3USE OF PROCEEDS10DESCRIPTION OF CAPITAL STOCK11DESCRIPTION OF DEBT SECURITIES14PLAN OF DISTRIBUTION21LEGAL MATTERS23EXPERTS23WHERE YOU CAN FIND MORE INFORMATION23INCORPORATION OF CERTAIN INFORMATION BY REFERENCE24 TABLE OF CONTENTS ABOUT THIS PROSPECTUS SUPPLEMENT This prospectus supplement and the accompanying prospectus are part of a registration statement on FormS-3(File No. 333-283488) that we filed with the with the United States Securities and Exchange Commission (the“SEC”), under the Securities Act of 1933, as amended (the “Securities Act”). This prospectus supplement and theaccompanying prospectus do not contain all the information in the registration statement. We have omitted certainparts of the registration statement, as permitted by the rules and regulations of the SEC. You may find theregistration statement, including exhibits, on the SEC’s website at www.sec.gov. See “Where You Can Find MoreInformation” and “Incorporation of Certain Documents by Reference.” This document is in two parts. The first part is this prospectus supplement, which describes the terms of thisoffering of York Water Common Stock and also adds to and updates information contained in the accompanyingprospectus and the documents incorporated by reference into this prospectus supplement and the accompanyingprospectus. The second part, the accompanying prospectus dated December9, 2024, including the documentsincorporated by reference therein, provides more general information. Generally, when we refer to this prospectus,we are referring to both parts of this document combined. To the extent there is a conflict between the informationcontained in this prospectus supplement, on the one hand, and the information contained in the accompanyingprospectus or in any document incorporated by reference that was filed with the SEC before the date of thisprospectus supplement, on the other hand, you should rely on the information in this prospectus supplement. If anystatement in one of these documents is inconsistent with a statement in another document having a later date (forexample, a document incorporated by reference in this prospectus supplement or in the accompanying prospectus)the statement in the document having the later date modifies or supersedes the earlier statement. We have not, and t