Rivers Robert Francis 4

4 · Eastern Bankshares, Inc. · Filed Mar 3, 2026

Insider Transaction Report

Form 4

Period: 2026-03-01

Eastern Bankshares, Inc.EBC

Rivers Robert Francis

DirectorExecutive Chair

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-03-01+47,492→ 450,766 total
Tax Payment
Common Stock
[F2]
2026-03-01$19.56/sh−16,893$330,427→ 433,873 total
Award
Common Stock
[F10]
2026-03-01+29,632→ 463,505 total
Tax Payment
Common Stock
[F2]
2026-03-01$19.56/sh−11,019$215,532→ 452,486 total
Exercise/Conversion
Restricted Stock Units
[F1][F5]
2026-03-01−21,347→ 21,348 total
→ Common stock (21,347 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F6]
2026-03-01−10,610→ 0 total
→ Common stock (10,610 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F7]
2026-03-01−15,535→ 15,535 total
→ Common stock (15,535 underlying)
Award
Restricted Stock Units
[F4][F9]
2026-03-02+33,301→ 33,301 total
→ Common stock (33,301 underlying)

Holdings

Common Stock
[F3]
(indirect: By ESOP)
4,921
Restricted Stock Units
[F1][F8]
→ Common stock (33,671 underlying)
33,671

Footnotes (10)

[F1]Restricted stock units convert into common stock on a one-for-one basis.
[F10]Represents shares of Eastern Bankshares, Inc. (the "Company") common stock, par value $0.01 per share ("Common Stock") received upon vesting of a performance restricted stock unit ("PRSU") award eligible to vest based upon the Company's performance on total shareholder return ("TSR") measured at the end of the three-year performance period of January 1, 2023 through December 31, 2025 (the "Performance Period") relative to TSR performance over that performance period of the banks listed on the KBW Nasdaq Regional Banking Index (the "TSR Measure"). The Compensation and Human Capital Management Committee determined that the Company's performance of the TSR Measure resulted in a payout of 93.1% of target.
[F2]Includes 200,000 shares held in joint tenancy with spouse.
[F3]Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report.
[F4]Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.
[F5]On March 1, 2022, the reporting person was granted 106,736 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.
[F6]On March 1, 2023, the reporting person was granted 31,829 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.
[F7]On March 1, 2024, the reporting person was granted 46,604 restricted stock units that vest in three equal annual installments beginning March 1, 2025, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
[F8]On March 3, 2025, the reporting person was granted 33,671 restricted stock units that vest in three equal annual installments beginning March 3, 2026, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
[F9]On March 2, 2026, the reporting person was granted 33,301 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Signature

/s/ Kathleen R. Henry, by Power of Attorney|2026-03-03

Documents

1 file

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ownership.xmlPrimary
4