SEC Form 4 · accession 0001731365-26-000007

· CLBK

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Director

Period of report

Jul 20, 2026

Accepted (ET)

Jul 22, 2026 · 9:22 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0002115119

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock	Jul 20, 2026	P	10,580	$10.00	A	105,490	D
Common Stock	Jul 20, 2026	P	12,200	$10.00	A	26,949	I	By Roth IRA
Common Stock	Jul 20, 2026	P	27,200	$10.00	A	49,184	I	By Stock-Based Deferral Plan
Common Stock	holding	—	—		—	97,783	I	By IRA
Common Stock^F1	holding	—	—		—	6,494	I	By Stock Award V

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Options (right to buy)^F2	$7.10	holding	—	—	—	Jul 23, 2020	Jul 23, 2029	Common Stock	137,442	137,442	D

F1Stock Awards granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan which vest in one year on March 12, 2027.
F2Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan are fully vested and exercisable.

Exhibit List: Exhibit 24 Power of Attorney