SEC Form 4 · accession 0001949911-26-000016

· CLBK

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

Reporting owner

Manesh Balachandran Prabhu

Officer — EVP & CIO

Period of report

Aug 26, 2026

Accepted (ET)

Aug 28, 2026 · 2:21 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^F1	Aug 26, 2026	A	10	$11.62	A	2,259	I	By Stock-Based Deferral Plan
Common Stock	holding	—	—		—	15,613	D
Common Stock	holding	—	—		—	15,000	I	By IRA
Common Stock^F2	holding	—	—		—	4,601	I	By 401(k)
Common Stock^F2	holding	—	—		—	7,114	I	By ESOP
Common Stock^F2	holding	—	—		—	1,911	I	By SERP
Common Stock^F3,F4	holding	—	—		—	22,628	I	By Stock Award III
Common Stock^F5	holding	—	—		—	24,239	I	By Stock Award IV

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Options (right to buy)^F6	$9.34	holding	—	—	—	Oct 31, 2023	Oct 31, 2032	Common Stock	28,567	28,567	D
Stock Options (right to buy)^F6	$7.25	holding	—	—	—	May 1, 2024	May 1, 2033	Common Stock	18,609	18,609	D
Stock Options (right to buy)^F7	$7.50	holding	—	—	—	Mar 6, 2025	Mar 6, 2034	Common Stock	18,251	18,251	D
Stock Options (right to buy)^F8	$7.38	holding	—	—	—	Mar 3, 2026	Mar 3, 2035	Common Stock	41,989	41,989	D
Stock Options (right to buy)^F9	$8.31	holding	—	—	—	Mar 2, 2027	Mar 2, 2036	Common Stock	42,999	42,999	D
Phantom Stock Unit^F10,F11	—	holding	—	—	—	—	—	Common Stock	16,871	16,871	I

Explanation of responses

F1Represents phantom stock dividends which are exempt under Rule 16b-3 in connection with the Columbia Bank Stock Based Deferral Plan.
F10One phantom stock unit is the economic equivalent of one share of CLBK Common Stock. Phantom stock units were granted under the Columbia Financial, Inc. 2026 Phantom Stock Plan and will be settled in cash upon distribution.
F11On the settlement date, phantom stock units will be payable in cash. The cash value will be calculated, in accordance with the Columbia Financial, Inc. 2026 Phantom Stock Plan, based on the closing stock price of the Company's Common Stock on the determination date.
F2This form reflects increases in beneficial ownership resulting from exempt acquisitions pursuant to rule 16b-3(c).
F3This form accounts for a decrease of 2 share from the prior report due to the rounding of fractional shares.
F4Stock Awards granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive plan, 25% of which vest in three approximately equal annual installments commencing on March 6, 2025; and the remaining 75% of which vest upon achievement of certain specified performance-based vesting criteria, which if achieved, such Awards would vest three years after the date of the Award.
F5Stock Awards granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive plan, which vest upon achievement of certain specified performance-based vesting criteria, which if achieved, such Awards would vest three years after the date of the Award on March 3, 2028.
F6Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan are fully vested and exercisable.
F7Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 6, 2025.
F8Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 3, 2026.
F9Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 2, 2027.