X0508 4 2025-11-01 0 0001769617 HarborOne Bancorp, Inc. HONE 0001958386 Stewart Susan Bugnacki C/O HARBORONE BANCORP BROCKTON MA 02301 0 1 0 0 SVP, Chief HR Officer 0 Common Stock 2025-11-01 4 A 0 8743 A 16556 D Common Stock 2025-11-01 4 D 0 16556 D 0 D Pursuant to the merger agreement between Eastern Bankshares, Inc. ("Eastern"), Eastern Bank, HarborOne Bancorp, Inc. ("HarborOne"), and HarborOne Bank (the "Merger Agreement"), each outstanding performance unit vested at the target level of performance. 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 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