X0508 4 2025-11-01 0 0001769617 HarborOne Bancorp, Inc. HONE 0001675744 Lynch Timothy R. C/O HARBORONE BANCORP, INC. BROCKTON MA 02301 1 0 0 0 0 Common Stock 2025-11-01 4 D 0 63747 D 0 D Stock Option (Right to Buy) 10.23 2025-11-01 4 J 0 83263 0 D 2027-08-15 Common Stock 83263 0 D Pursuant to the merger agreement, dated as of April 24, 2025, by and among Eastern Bankshares, Inc. ("Eastern"), Eastern Bank, HarborOne Bancorp, Inc. ("HarborOne"), and HarborOne Bank (the "Merger Agreement"), each share of HarborOne common stock was converted into the right to receive, at the election of the holder, either (i) $12.00 in cash or (ii) 0.765 shares of Eastern common stock (the "Exchange Ratio"), subject to certain proration provisions contained in the Merger Agreement. Pursuant to the Merger Agreement, each outstanding and unexercised option to purchase shares of HarborOne common stock was converted into an option to purchase shares of Eastern common stock. As further described in the Merger Agreement, the number of underlying shares of resulting Eastern common stock subject to such options and the related exercise price were adjusted by the Exchange Ratio. /s/ Joseph F. Casey, attorney-in-fact 2025-11-03