Common Stock, par value $0.01 per share

URSB Bancorp, Inc.

11-15 COOKE AVENUE, CARTERET, NJ, 07008

This Schedule 13D is being filed jointly by Stilwell Activist Fund, L.P., a Delaware limited partnership ("Stilwell Activist Fund"); Stilwell Activist Investments, L.P., a Delaware limited partnership ("Stilwell Activist Investments"); Stilwell Partners, L.P., a Delaware limited partnership ("Stilwell Partners"); Stilwell Value LLC, a Delaware limited liability company ("Stilwell Value LLC") and the general partner of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners; and Joseph Stilwell, the managing member and owner of Stilwell Value LLC (collectively, "we" or "us"). The filers of this statement are collectively referred to herein as the "Group." The joint filing agreement of the members of the Group is filed as Exhibit 1 to this Schedule 13D. This statement is filed by Joseph Stilwell with respect to the shares of common stock, par value $0.01 per share (the "Common Stock") of URSB Bancorp, Inc. (the "Issuer") beneficially owned by Joseph Stilwell, including shares of Common Stock held in the names of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners, in Joseph Stilwell's capacities as the managing member and owner of Stilwell Value LLC, which is the general partner of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners.

The business address of Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Partners, and Stilwell Value LLC is 111 Broadway, 12th Floor, New York, New York 10006. The business address of Joseph Stilwell is 200 Calle del Santo Cristo, Segundo Piso, San Juan, Puerto Rico 00901.

The principal employment of Joseph Stilwell is investment management. Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners are private investment partnerships engaged in the purchase and sale of securities for their own accounts. Stilwell Value LLC serves as the general partner of Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Partners, and related partnerships.

During the past five years, no member of the Group has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was or is 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, except as indicated in Schedule B, attached hereto and incorporated herein by reference.

Joseph Stilwell is a citizen of the United States.

The members of the Group beneficially own an aggregate of 223,118 shares of Common Stock. The percentages used in this filing are calculated based on 2,334,375 shares of Common Stock outstanding as of March 26, 2026, as reported in Exhibit 99 to the Issuer's Current Report on Form 8-K filed with the Securities and Exchange Commission on March 26, 2026. The purchases and sales of Common Stock reported in this item, if any, were made in open-market transactions. Each of Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Partners, Stilwell Value LLC and Joseph Stilwell may be deemed to beneficially own 223,118 shares of Common Stock, constituting approximately 9.6% of the shares of Common Stock outstanding.

Each of Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Partners, Stilwell Value LLC and Joseph Stilwell may be deemed to share the power to vote and dispose of 223,118 shares of Common Stock owned in the aggregate by Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners. Because he is the managing member and owner of Stilwell Value LLC, which is the general partner of each of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners, Joseph Stilwell has the power to direct the affairs of each of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners, including the voting and disposition of shares of Common Stock held in the name of each of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners. Therefore, Joseph Stilwell is deemed to share voting and disposition power with each of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners with regard to those shares of Common Stock. Because he is the managing member and owner of Stilwell Value LLC, Joseph Stilwell has the power to direct the affairs of Stilwell Value LLC. Stilwell Value LLC is the general partner of each of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners. Therefore, Stilwell Value LLC may be deemed to share with Joseph Stilwell voting and disposition power with regard to the shares of Common Stock held by each of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Partners.

Within the past sixty days, each of Stilwell Activist Fund, Stilwell Activist Investments and Stilwell Partners purchased shares of Common Stock in the open market as set forth in Schedule C, attached hereto and incorporated herein by reference. Stilwell Value LLC and Joseph Stilwell have not purchased or sold any shares of Common Stock.

No person other than Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Partners, Stilwell Value LLC and Joseph Stilwell is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the shares of Common Stock.

Not applicable.