X0306 4 2023-03-01 0001769617 HarborOne Bancorp, Inc. HONE 0001758134 Diepold Brenda Carolyn C/O HARBORONE BANCORP, INC. BROCKTON MA 02301 1 EVP, Retail Officer Common Stock 2023-03-01 4 A 0 3622 0 A 25573 D Common Stock 2023-03-01 4 F 0 759 13.67 D 24814 D Acquisition represents award of restricted stock for no consideration. This restricted stock award vests in three equal annual installments beginning on March 1, 2024. Shares withheld by Issuer to cover withholding taxes associated with the vesting of restricted shares. /s/ Linda H. Simmons, attorney-in-fact 2023-03-02