X0202 SCHEDULE 13D/A 0002037909 XXXXXXXX LIVE 1 Common Stock 06/29/2026 0002013792 26929P107 EWSB Bancorp, Inc.

109 West Second Street Kaukauna WI 54130

James E. Mangold 920-766-4646 109 West Second Street Kaukauna WI 54130 0002037909 N James E. Mangold PF X1 88068 10000 88068 10000 98068 9.67 IN HC Y Sara Mangold PF X1 1698 96370 1698 96370 98068 9.67 IN Common Stock EWSB Bancorp, Inc. 109 West Second Street Kaukauna WI 54130 James E. Mangold and Sara Mangold The address for both James E. Mangold and Sara Mangold is: 4774 Potters Crossing, Pulaski, Wisconsin 54162 Mr. Mangold is the Vice President of Lending for East Wisconsin Savings Bank, 109 West Second Street, Kaukauna, Wisconsin 54310. Mrs. Mangold is Principal, Assumption B.V.M. Neither Mr. Mangold nor Mrs. Mangold has, during the last five years, been convicted in any criminal proceeding (excluding traffic violations or similar misdemeanors). Neither Mr. Mangold nor Mrs. Mangold has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and has not, as a result of such proceeding, been subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. Mr. Mangold and Mrs. Mangold are both U.S. citizens. The shares of the Issuer's Common Stock were purchased with personal funds. The shares covered by this Schedule 13D are being held for investment purposes. Mr. Mangold and Mrs. Mangold may, from time to time, acquire additional securities of the Issuer using personal funds through a broker and/or privately negotiated transactions or dispose of securities. Except as described above, neither Mr. Mangold (except in his capacity as an officer of the Issuer and of East Wisconsin Savings Bank, the wholly-owned subsidiary of the Issuer) nor Mrs. Mangold have any present plans or proposals that relate to or would result in, any of the matters listed in Items 4(a)-(j) of Schedule 13D, although, depending on the factors discussed herein, the Reporting Person may change his purpose or formulate different plans or proposals with respect thereto at any time. As of the date hereof, Mr. Mangold and Mrs. Mangold beneficially own, in the aggregate, 98,068 shares of the Issuer's Common Stock, representing 9.67% of the 1,014,220 shares of the Common Stock deemed outstanding for such purpose. Mr. Mangold has sole voting and dispositive power with respect to 88,068 shares of the Issuer's Common Stock and has shared voting and dispositive power with respect to 10,000 shares of the Issuer's Common stock with his spouse, Sara Mangold. Ms. Mangold has sole voting and dispositive power with respect to 1,698 shares of the Issuer's Common Stock and has shared voting and dispositive power with respect to 96,370 shares of the Issuer's Common stock with her spouse, James E. Mangold. On June 29, 2026, Mr. Mangold purchased 39,950 shares for a purchase price of $10 per share in a subscription offering. None Not applicable See response to Item 4 above. See Exhibit 1. James E. Mangold /s/ James E. Mangold 07/27/2026 Sara Mangold /s/ Sara Mangold 07/27/2026