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): December 23, 2015

PSB Holdings, Inc.

(Exact name of registrant as specified in its charter)

(860) 928-6501

(Registrant’s telephone number, including area code)

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):

FORWARD-LOOKING STATEMENTS

This Current Report contains certain forward-looking statements about the conversion from the mutual holding company to the stock holding company form of organization (the “Conversion”) of PSB Holdings, Inc. (the “Company”). Forward-looking statements include statements regarding anticipated future events and can be identified by the fact that they do not relate strictly to historical or current facts. They often include words such as “believe,” “expect,” “anticipate,” “estimate,” and “intend” or future or conditional verbs such as “will,” “would,” “should,” “could,” or “may.” Forward-looking statements, by their nature, are subject to risks and uncertainties. Certain factors that could cause actual results to differ materially from expected results include delays in consummation of the Conversion, changes in general economic conditions or conditions within the securities markets, confirmation of final offering proceeds, and legislative and regulatory changes that could adversely affect our business.

(a)    A special meeting of the Company’s stockholders was held on December 23, 2015 to consider and vote upon Putnam Bancorp, MHC’s Plan of Conversion and Reorganization (the “Plan”) providing for the Conversion, and to consider and vote on related matters.

(b) The specific matters considered and voted on by the stockholders at the special meeting and the votes of the stockholders were as follows:

Proposal No. 1

The approval of a plan of conversion and reorganization whereby Putnam Bancorp, MHC and PSB Holdings, Inc. will convert and reorganize from the mutual holding company structure to the stock holding company structure.

Proposal No. 2

The approval of the adjournment of the special meeting, if necessary, to solicit additional proxies in the event that there are not sufficient votes at the time of the special meeting to approve the plan of conversion and reorganization.

Proposal No. 3

The approval of a provision in PB Bancorp’s articles of incorporation requiring a super-majority vote of stockholders to approve certain amendments to PB Bancorp’s articles of incorporation.

Proposal No. 4

The approval of a provision in PB Bancorp’s articles of incorporation requiring a super-majority vote of stockholders to approve stockholder-proposed amendments to PB Bancorp’s bylaws.

Proposal No. 5

The approval of a provision in PB Bancorp’s articles of incorporation to limit the voting rights of shares beneficially owned in excess of 10% of PB Bancorp’s outstanding voting stock.

On December 23, 2015, the depositors of Putnam Bank also approved the Plan.

In addition, PB Bancorp, Inc. (“PB Bancorp”), the proposed successor holding company for Putnam Bank, has completed the subscription offering being conducted in connection with the Conversion. Based on the results of the subscription offering, PB Bancorp will not conduct a community offering or a syndicated community offering. PB Bancorp anticipates that the offering will be completed at the adjusted maximum of the offering range, as adjusted to reflect actual assets held by Putnam Bancorp, MHC. Subject to the receipt of customary regulatory approvals, the closing of the offering and Conversion is expected to occur in early January 2016.

None

SIGNATURE

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.