Denis K. Sheahan - 03 Sep 2026 Form 4 Insider Report for Eastern Bankshares, Inc. (EBC)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: EBC
Reported as of: 03 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Sep 2026, 16:15:05 UTC
Prior SEC filing: 05 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Laura Vaughn Burek, by Power of Attorney

Key filing fact

Denis K. Sheahan filed Form 4 for Eastern Bankshares, Inc. (EBC) on 04 Sep 2026.

Key facts

This page summarizes Denis K. Sheahan's Form 4 filing for Eastern Bankshares, Inc. (EBC).
3 reported transactions and 8 derivative rows are listed below.
Accepted by SEC: 04 Sep 2026, 16:15.

Change

Previous filing in this sequence was filed on 05 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 0001207221 Primary reporting owner

SHEAHAN DENIS K

Relationship: Chief Executive Officer, Director
Address: 125 HIGH STREET, BOSTON
Signature: /s/ Laura Vaughn Burek, by Power of Attorney
Signature date: 04 Sep 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: +8,607
Change %
Price: $0.000000^*
Shares after: 8,607
Date: 03 Sep 2026
Ownership: Direct
Footnotes: F2

EBC transaction

Common Stock

Tax liability

Transaction value
Shares: -4,162
Change %: -48%
Price: $22.08^*
Shares after: 4,445
Date: 03 Sep 2026
Ownership: Direct

EBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 269,662
Date: 03 Sep 2026
Ownership: By Revocable Trust

EBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 33,305
Date: 03 Sep 2026
Ownership: By IRA

EBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 902
Date: 03 Sep 2026
Ownership: By ESOP
Footnotes: F12

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: -8,607
Change %: -50%
Price: $0.000000^*
Shares after: 8,608
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 8,607
Exercise price
Footnotes: F8, F9

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 17,907
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 17,907
Exercise price
Footnotes: F1, F2, F3

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,752
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 3,752
Exercise price
Footnotes: F1, F2, F4

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 34,544
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 34,544
Exercise price
Footnotes: F1, F2, F5

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 33,721
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 33,721
Exercise price
Footnotes: F1, F2, F6

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,221
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 42,221
Exercise price
Footnotes: F1, F2, F7

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 120,023
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 120,023
Exercise price
Footnotes: F2, F10

EBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 24,340
Date: 03 Sep 2026
Ownership: Direct
Underlying class: Common stock
Underlying amount: 24,340
Exercise price
Footnotes: F8, F11

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 12 footnotes

Footnote F1

Eastern Bankshares, Inc. (the "Company") issued these time-based restricted stock units ("RSUs") as of July 12, 2024, when the Company completed a merger with Cambridge Bancorp ("Cambridge"). Pursuant to the terms of the Agreement and Plan of Merger, dated September 19, 2023, Cambridge RSUs and performance-based restricted stock units ("PRSUs") were assumed and converted to Company RSUs at an exchange ratio of 4.956 Company units for each Cambridge unit.

Footnote F2

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

Footnote F3

This award for 17,907 Company RSUs replaced an award of Cambridge RSUs granted to the reporting person on February 15, 2021, that vested in three equal annual installments beginning one year after the grant date. The reporting person elected to defer receipt of common stock issuable upon the vesting of these RSUs.

Footnote F4

This award for 3,752 Company RSUs replaced an award of Cambridge RSUs granted to the reporting person on February 15, 2022, that provided for vesting in three equal annual installments beginning one year after the grant date. The reporting person elected to defer receipt of common stock issuable upon vesting except for shares withheld for tax obligations.

Footnote F5

This award for 34,544 Company RSUs replaced an award of Cambridge RSUs granted to the reporting person on April 28, 2023, that provided for vesting in three equal annual installments beginning one year after the grant date. The reporting person elected to defer receipt of common stock issuable upon vesting except for shares withheld for tax obligations.

Footnote F6

This award for 33,721 Company RSUs replaced an award of Cambridge PRSUs granted to the reporting person on February 15, 2022. The Company RSU award provided for cliff vesting on December 31, 2024. The reporting person elected to defer receipt of common stock issuable upon vesting except for shares withheld for tax obligations.

Footnote F7

This award for 42,221 Company RSUs replaced an award of Cambridge PRSUs that Cambridge granted to the reporting person on April 28, 2023. The Company RSU award provided for cliff vesting on December 31, 2025. The reporting person elected to defer receipt of common stock issuable upon vesting except for shares withheld for tax obligations.

Footnote F8

Each restricted stock unit represents a contingent right to receive one share of Company common stock on the applicable vesting date.

Footnote F9

On September 3, 2024, the reporting person was granted 25,821 restricted stock units that vest in three equal annual installments beginning September 3, 2025, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Footnote F10

On March 3, 2025, the reporting person was granted 154,088 restricted stock units of which 24,365 vest in three equal annual installments beginning March 3, 2026 after market close, and 129,723 vest in five equal installments beginning on March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Footnote F11

On March 2, 2026, the reporting person was granted 24,340 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.

Footnote F12

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