Donald Michael Westermann - 03 Mar 2026 Form 4 Insider Report for Eastern Bankshares, Inc. (EBC)

Reporting relationship: Chief Information Officer
Issuer ticker: EBC
Reported as of: 03 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Mar 2026, 16:41:36 UTC
Prior SEC filing: 03 Mar 2026
Next SEC filing: 02 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Kathleen R. Henry, by Power of Attorney

Key filing fact

Donald Michael Westermann filed Form 4 for Eastern Bankshares, Inc. (EBC) on 05 Mar 2026.

Key facts

This page summarizes Donald Michael Westermann's Form 4 filing for Eastern Bankshares, Inc. (EBC).
3 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 05 Mar 2026, 16:41.

Change

Previous filing in this sequence was filed on 03 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001825585 Primary reporting owner

Westermann Donald Michael

Relationship: Chief Information Officer
Address: 125 HIGH STREET, BOSTON
Signature: /s/ Kathleen R. Henry, by Power of Attorney
Signature date: 05 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

EBC transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,165
Change %: +6.8%
Price: $0.000000^*
Shares after: 33,933
Date: 03 Mar 2026
Ownership: Direct
Footnotes: F1

EBC transaction

Common Stock

Tax liability

Transaction value
Shares: -961
Change %: -2.8%
Price: $19.45^*
Shares after: 32,972
Date: 03 Mar 2026
Ownership: Direct

EBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 22,682
Date: 03 Mar 2026
Ownership: By 401(k)
Footnotes: F2

EBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,921
Date: 03 Mar 2026
Ownership: By ESOP
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

EBC transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -2,165
Change %: -6.2%
Price: $0.000000^*
Shares after: 32,532
Date: 03 Mar 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 2,165
Exercise price
Footnotes: F1, F5

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 9,488
Date: 03 Mar 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 9,488
Exercise price
Footnotes: F1, F3

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,895
Date: 03 Mar 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 2,895
Exercise price
Footnotes: F1, F4

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 7,099
Date: 03 Mar 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 7,099
Exercise price
Footnotes: F1, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

Restricted stock units convert into common stock on a one-for-one basis.

Footnote F2

Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report.

Footnote F3

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.

Footnote F4

On March 1, 2024, the reporting person was granted 8,683 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.

Footnote F5

On March 3, 2025, the reporting person was granted 34,697 restricted stock units of which 6,497 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Footnote F6

On March 2, 2026, the reporting person was granted 7,099 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.