[Form 4] Columbia Financial, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Columbia Financial (CLBK) reported an insider transaction by its SEVP & Chief Risk Officer. On 10/31/2025, the officer acquired 43.2854 shares of common stock at $14.75, recorded as phantom stock purchased under the Bank’s Stock Based Deferral Plan, which will be settled in shares upon distribution.

Following the transaction, the officer beneficially owned 7,981.3625 shares indirectly via the Stock‑Based Deferral Plan. Additional positions include 60,769 shares held directly, and indirect holdings through retirement and incentive plans. Derivative holdings include stock options for 188,235 shares at $15.60 expiring 07/23/2029, 12,030 at $15.94 expiring 05/01/2033, 8,850 at $16.49 expiring 03/06/2034, and 20,310 at $16.23 expiring 03/03/2035.

Insights

Insider transactions analyst

Small routine insider acquisition; informational only.

The filing records a modest acquisition of 43.2854 shares at $14.75 on 10/31/2025 through a stock-based deferral plan. This mechanism credits phantom stock that will be settled in actual shares upon distribution.

Post-transaction, indirect holdings via the deferral plan total 7,981.3625 shares, alongside direct and other plan-based holdings. Derivative exposure is detailed across multiple option grants with specified exercise prices and expirations.

This is a routine Form 4 entry without a clear thesis-changing impact. Actual market effect depends on future exercises or distributions as disclosed in subsequent filings.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Klimowich John

(Last) (First) (Middle)

19-01 ROUTE 208 NORTH

(Street)

FAIR LAWN NJ 07410

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Columbia Financial, Inc. [ CLBK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SEVP & Chief Risk Officer

3. Date of Earliest Transaction (Month/Day/Year)
10/31/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/31/2025		A		43.2854(1)	A	$14.75	7,981.3625	I	By Stock-Based Deferral Plan
Common Stock								60,769	D
Common Stock								17,130	I	By 401(k)
Common Stock								7,620	I	By ESOP
Common Stock								7,051	I	By SERP
Common Stock								4,214	I	By SIM
Common Stock								13,781	I	By Stock Award II(2)
Common Stock								12,068	I	By Stock Award III(3)
Common Stock								11,723	I	By Stock Award IV(4)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (right to buy)	$15.6							07/23/2020(5)	07/23/2029	Common Stock	188,235		188,235	D
Stock Options (right to buy)	$15.94							05/01/2024(6)	05/01/2033	Common Stock	12,030		12,030	D
Stock Options (right to buy)	$16.49							03/06/2025(7)	03/06/2034	Common Stock	8,850		8,850	D
Stock Options (right to buy)	$16.23							03/03/2026(8)	03/03/2035	Common Stock	20,310		20,310	D

Explanation of Responses:

1. Represents phantom stock purchased, on a non-discretionary basis, by the trustee of the Bank's rabbi trust maintained in connection with the Columbia Bank Stock Based Deferral Plan, a non-qualified stock-based deferral plan. Stock unit interests under the Columbia Bank Stock Based Deferral Plan will be settled in shares of stock upon distribution to the reporting person.

2. 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.

3. 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.

4. 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.

5. Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan are fully vested and exercisable.

6. 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.

7. 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.

8. 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.

Remarks:

	/s/ Dennis E. Gibney, Power of Attorney	11/04/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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