X0306 4 2023-03-01 0 0001810546 Eastern Bankshares, Inc. EBC 0001913899 Buscone Gregory Paul 265 FRANKLIN STREET BOSTON MA 02110 0 1 0 0 See Remarks Common Stock 2023-03-01 4 M 0 9487 0.00 A 9487 D Common Stock 2023-03-01 4 F 0 2975 15.63 D 6512 D Common Stock 51927 I By 401(k) Common Stock 1845 I By ESOP Restricted Stock Units 2023-03-01 4 M 0 9487 0.00 D Common Stock 9487 37951 D Restricted Stock Units 2023-03-01 4 A 0 4926 0.00 A Common Stock 4926 4926 D Restricted stock units convert into common stock on a one-for-one basis Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report. Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date. On March 1, 2022, the reporting person was granted 47,438 restricted stock units that vest in five equal annual installments beginning March 1, 2023, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date. On March 1, 2023, the reporting person was granted 4,926 restricted stock units that vest in three equal annual installments beginning March 1, 2024, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date. EVP Sr. Commercial Banking Ofcr Exhibit 24.1 Power of Attorney /s/ Sara Rundell, by Power of Attorney 2023-03-03