X0609 4 2026-07-20 1 0001493225 Northfield Bancorp, Inc. NFBK 0001409452 Chapman Gil false 581 MAIN STREET, SUITE 810 WOODBRIDGE NJ 07095 1 0 0 0 0 Common Stock 2026-07-20 4 D 0 48005 D 0 D Common Stock 2026-07-20 4 D 0 6763 D 0 I By Spouse's IRA 1 Common Stock 2026-07-20 4 D 0 7651 D 0 I By IRA 1 Restricted Stock Units 2026-07-20 4 D 0 4383 D Common Stock 4383 0 D Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective time of the merger between Northfield Bancorp, Inc, and Newco, each issued and outstanding share of Northfield Bancorp, Inc. common stock was converted into the right to receive, at the election of the holder, either (i) 1.425 shares of Newco common stock or (ii) $14.25 in cash. Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting. /s/ William R. Jacobs, pursuant to Power of Attorney 2026-07-20