Oliver Edward Lewis Jr. - 06 Mar 2026 Form 4 Insider Report for Columbia Financial, Inc. (CLBK)

Role: SEVP & Head Commercial Banking
Signature: /s/ Dennis E. Gibney, Power of Attorney
Issuer symbol: CLBK
Transactions as of: 06 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 10 Mar 2026, 16:14:54 UTC
Previous filing: 04 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lewis Oliver Edward Jr	SEVP & Head Commercial Banking	19-01 ROUTE 208 NORTH, FAIR LAWN	/s/ Dennis E. Gibney, Power of Attorney	10 Mar 2026	0001839477

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CLBK	Common Stock	Tax liability		-392	-1.4%	$18.06^*	27,336	06 Mar 2026	Direct	F1
holding	CLBK	Common Stock						4,905	06 Mar 2026	By Stock-Based Deferral Plan
holding	CLBK	Common Stock						6,521	06 Mar 2026	By ESOP
holding	CLBK	Common Stock						2,919	06 Mar 2026	By SERP
holding	CLBK	Common Stock						681	06 Mar 2026	By SIM
holding	CLBK	Common Stock						13,265	06 Mar 2026	By Stock Award III	F2
holding	CLBK	Common Stock						10,560	06 Mar 2026	By Stock Award IV	F3
holding	CLBK	Common Stock						11,300	06 Mar 2026	By Stock Award V	F4
holding	CLBK	Common Stock						11,772	06 Mar 2026	Stock Award VI	F5

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	CLBK	Stock Options (right to buy)						17,647	06 Mar 2026	Common Stock	17,647	$17.00	Direct	F6
holding	CLBK	Stock Options (right to buy)						57,026	06 Mar 2026	Common Stock	57,026	$17.86	Direct	F6
holding	CLBK	Stock Options (right to buy)						11,579	06 Mar 2026	Common Stock	11,579	$15.94	Direct	F7
holding	CLBK	Stock Options (right to buy)						8,518	06 Mar 2026	Common Stock	8,518	$16.49	Direct	F8
holding	CLBK	Stock Options (right to buy)						19,576	06 Mar 2026	Common Stock	19,576	$16.23	Direct	F9
holding	CLBK	Stock Options (right to buy)						20,000	06 Mar 2026	Common Stock	20,000	$18.28	Direct	F10

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The number of shares held directly includes certain shares that were previously held by Stock Award and that have subsequently vested.
F2	Stock Awards granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive plan, 25% of which vest in three approximately equal annual installments commencing on May 1, 2024; 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.
F3	Stock 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.
F4	Stock 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.
F5	Stock 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.
F6	Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan are fully vested and exercisable.
F7	Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on May 1, 2024.
F8	Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 6, 2025.
F9	Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 3, 2026.
F10	Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan vest in three approximately equal annual installments commencing on March 2, 2027.