UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): October 15, 2025

SENECA BANCORP, INC.

(Exact Name of Registrant as Specified in Charter)

Maryland	333-288044		39-4029114
(State or Other Jurisdiction)	(Commission File No.)		(I.R.S. Employer
of Incorporation)			Identification No.)

35 Oswego Street, Baldwinsville, New York		13027
(Address of Principal Executive Offices)			(Zip Code)

Registrant's telephone number, including area code: (315) 638-0233

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
N/A		None		None

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

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. ☐

Item 8.01. Other Events.

On October 15, 2025, Seneca Bancorp, Inc., a Maryland corporation (the “Company”) issued a press release to announce the completion of the conversion of Seneca Financial MHC from the mutual holding company form of organization to the fully public stock holding company form of organization, the related stock offering and Seneca Savings Bank’s charter conversion from a federal savings association to a national association. For additional information, refer to the press release dated October 15, 2025, which is filed as Exhibit 99.1 hereto and incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d)

Exhibits

99.1

Press Release dated October 15, 2025

104

Cover Page Interactive Data File (embedded within Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

		SENECA BANCORP, INC.



DATE: October 15, 2025	By:	/s/ Joseph G. Vitale
		Joseph G. Vitale
		President and Chief Executive Officer

Seneca Bancorp, Inc. 8-K