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
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 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person *
Prabhu Manesh Balachandran
(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)
EVP & CIO
3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026
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 03/06/2026   F   382 D $ 18.06 5,504 (1) D  
Common Stock               545.5975 I By Stock-Based Deferral Plan
Common Stock               1,680 (2) I By 401(k)
Common Stock               2,150 I By ESOP
Common Stock               437 I By SERP
Common Stock               9,690 I By Stock Award II (3)
Common Stock               10,286 I By Stock Award III (4)
Common Stock               11,018 I By Stock Award IV (5)
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) $ 20.54             10/31/2023 (6) 10/31/2032 Common Stock 12,985   12,985 D  
Stock Options (right to buy) $ 15.94             05/01/2024 (7) 05/01/2033 Common Stock 8,459   8,459 D  
Stock Options (right to buy) $ 16.49             03/06/2025 (8) 03/06/2034 Common Stock 8,296   8,296 D  
Stock Options (right to buy) $ 16.23             03/03/2026 (9) 03/03/2035 Common Stock 19,086   19,086 D  
Stock Options (right to buy) $ 18.28             03/02/2027 (10) 03/02/2036 Common Stock 19,545   19,545 D  
Phantom Stock Unit (11)               (12)   (12) Common Stock 7,669   7,669 I Deferred Stock Unit Plan
Explanation of Responses:
1. The number of shares held directly includes certain shares that were previously held by Stock Award and that have subsequently vested.
2. This form reflects increases in beneficial ownership resulting from exempt acquisitions pursuant to rule 16b-3(c).
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 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.
4. 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.
5. 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.
6. Stock Options granted pursuant to the Columbia Financial, Inc. 2019 Equity Incentive Plan are fully vested and exercisable.
7. 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.
8. 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.
9. 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.
10. 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.
11. One 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.
12. On 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.
/s/ Dennis E. Gibney, Power of Attorney 03/10/2026
** 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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