Form 4 Filing for John Klimowich

This filing details transactions made by John Klimowich, SEVP & Chief Risk Officer of Columbia Financial, Inc. (CLBK). On April 17, 2026, Klimowich acquired 36.8869 shares of common stock under a stock-based deferral plan at a price of $18.56 per share. Following this transaction, his holdings in this plan amount to 9042.1358 shares. The filing also reports Klimowich's other holdings, including directly owned shares (61,464.0), shares held in a 401(k) (17,130.0), ESOP (8,689.0), SERP (7,627.0), SIM (4,214.0), and various stock awards and options granted under the 2019 Equity Incentive Plan. Specific details on vesting schedules and exercise prices for stock options and awards are provided in the footnotes.