Columbia Financial to Merge with Northfield Bancorp

Columbia Financial, Inc. filed an Amendment No. 1 to its Form S-4 registration statement with the SEC on April 20, 2026. The filing relates to a merger involving Northfield Bancorp, with the transaction securities described as part of a joint proxy statement/prospectus.

The S-4/A includes standard merger registration statement language covering the proposed sale of securities to the public after the registration statement becomes effective and upon completion of the merger.