SEC Form 4 · accession 0001729835-26-000013

· CLBK

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

Reporting owner

Dennis E. Gibney

Officer — 1st Sr. EVP, CBO · Director

Period of report

Aug 26, 2026

Accepted (ET)

Aug 28, 2026 · 2:19 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	18	$11.62	A	4,316	I	By Stock-Based Deferral Plan
Common Stock	holding	—	—		—	376,592	D
Common Stock^F2	holding	—	—		—	11,549	I	By 401(k)
Common Stock^F2	holding	—	—		—	19,198	I	By ESOP
Common Stock^F2	holding	—	—		—	25,194	I	By SERP
Common Stock	holding	—	—		—	6,600	I	By IRA
Common Stock	holding	—	—		—	22,000	I	By Spouse
Common Stock	holding	—	—		—	34,500	I	By SEP-IRA
Common Stock^F3,F4	holding	—	—		—	26,881	I	By Stock Award III
Common Stock^F5	holding	—	—		—	28,899	I	By Stock Award IV
Common Stock^F6	holding	—	—		—	68,668	I	By Stock Award V

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)^F7	$7.10	holding	—	—	—	Jul 23, 2020	Jul 23, 2029	Common Stock	528,000	528,000	D
Stock Options (right to buy)^F7	$7.25	holding	—	—	—	May 1, 2024	May 1, 2033	Common Stock	29,475	29,475	D
Stock Options (right to buy)^F8	$7.50	holding	—	—	—	Mar 6, 2025	Mar 6, 2034	Common Stock	21,683	21,683	D
Stock Options (right to buy)^F9	$7.38	holding	—	—	—	Mar 3, 2026	Mar 3, 2035	Common Stock	50,065	50,065	D
Stock Options (right to buy)^F10	$8.31	holding	—	—	—	Mar 2, 2027	Mar 2, 2036	Common Stock	116,672	116,672	D

Explanation of responses

F1Represents phantom stock dividends which are exempt under Rule 16b-3 in connection with the Columbia Bank Stock Based Deferral Plan.
F10Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 2, 2027.
F2This form reflects increases in beneficial ownership resulting from exempt acquisitions pursuant to rule 16b-3(c).
F3This form accounts for a decrease of 1 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 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 2, 2029.
F7Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan are fully vested and exercisable.
F8Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 6, 2025.
F9Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 3, 2026.