CFSB Bancorp, Inc. /MA/ — Director's Dealing 2025

Oct 31, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CFSB Bancorp, Inc. /MA/ (CFSB)
CIK: 0001879103
Period of Report: 2025-10-31

Reporting Person: Kuropatkin Mary (VP-Retail Banking)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-31	Common Stock	D	6000	—	Disposed	0	Direct
2025-10-31	Common Stock	D	2381	—	Disposed	0	Indirect
2025-10-31	Common Stock	D	9940	—	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-10-31	Stock Options	$7.99	D	14000	Disposed	2033-03-22	Common Stock (14000)	Direct

Footnotes

F1: Pursuant to the Agreement and Plan of Merger dated as of May 20, 2025, by and among Hometown Financial Group, MHC, Hometown Financial Group, Inc., Hometown Financial Acquisition Corp. II, 15 Beach, MHC and the Issuer (the "Merger Agreement"), at the Effective Time (as defined in the Merger Agreement), each issued and outstanding share of Common Stock of the Issuer was converted automatically into the right to receive cash in an amount equal to $14.25 per share without interest (the "Merger Consideration").

F2: Pursuant to the Merger Agreement, all unvested shares of restricted stock automatically vested in full at the Effective Time, and were considered outstanding shares of common stock entitled to receive the Merger Consideration, net of all applicable withholding taxes.

F3: Reflects transactions not required to be reported pursuant to Section 16 of the Securities Act of 1934, as amended.

F4: Pursuant to the Merger Agreement, each outstanding and unexercised option immediately prior to the Effective Time, whether vested or unvested, was cancelled in exchange for the right to receive an amount in cash equal to the product of (i) the excess, if any, of the Merger Consideration over the per share exercise price of such option, multiplied by (ii) the number of shares of Common Stock then subject to such option, net of all applicable withholding taxes.