Narragansett Bancorp, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

For the quarterly period ended June 30,2026

OR

For the transition period from _______________ to _______________

Commission File Number:333-296731

NARRAGANSETT BANCORP, INC.

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code:(888)806-2872

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. (1)Yes ☒ No ☐ (2) Yes☐ No ☒

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No☒

As of September 21, 2026, the registrant hadno shares of common stock outstanding.

Table of Contents

NARRAGANSETT FINANCIAL CORPORATION AND SUBSIDIARY

Unaudited Consolidated Financial Statements as of June 30, 2026 and for the three and six months ended June 30, 2026 and 2025.

Explanatory Note

BayCoast Bank and Narragansett Financial Corporation (the "Company") have approved a Plan of Holding Company Reorganization and Plan of Stock Issuance pursuant to which they would reorganize into a two-tier holding company structure with Narragansett Bancorp, Inc. (the "Registrant") as the mid-tier holding company. As of June 30, 2026 the reorganization had not been completed, and, as of that date, the Registrant had no assets or liabilities, and had not conducted any business other than that of an organizational nature. Accordingly, financial and other information of the Company is included in this Quarterly Report.