# EDGAR Filing Document

**Accession Number:** 0001207221
**File Stem:** 0001193125-26-094389
**Filing Date:** 2026-3
**Character Count:** 10972
**Document Hash:** a3b9aef5f289e0530a69091500dea8d8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-094389.hdr.sgml**: 20260305

**ACCESSION NUMBER**: 0001193125-26-094389

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260303

**FILED AS OF DATE**: 20260305

**DATE AS OF CHANGE**: 20260305

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** SHEAHAN DENIS K
- **CENTRAL INDEX KEY:** 0001207221

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39610
- **FILM NUMBER:** 26727809

**MAIL ADDRESS:**
- **STREET 1:** 78 BLANCHARD ROAD
- **CITY:** BURLINGTON
- **STATE:** MA
- **ZIP:** 01803
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eastern Bankshares, Inc.
- **CENTRAL INDEX KEY:** 0001810546
- **STANDARD INDUSTRIAL CLASSIFICATION:** SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 125 HIGH STREET, STE 901
- **STREET 2:** OLIVER STREET TOWER
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617-897-1100

**MAIL ADDRESS:**
- **STREET 1:** 125 HIGH STREET, STE 901
- **STREET 2:** OLIVER STREET TOWER
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>SHEAHAN DENIS K<br><sub>(Last) (First) (Middle)</sub><br>125 HIGH STREET<br><sub>(Street)</sub><br>BOSTON, MA 02110<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Executive Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Eastern Bankshares, Inc. [ EBC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-03-03 |  | M |  | 34065<sup>(2)</sup> | A | $0 | 34065 | D |  |
| Common Stock | 2026-03-03 |  | F |  | 15184 | D | $19.45 | 18881 | D |  |
| Common Stock |  |  |  |  |  |  |  | 250781 | I | By Revocable Trust |
| Common Stock |  |  |  |  |  |  |  | 33305 | I | By IRA |
| Common Stock |  |  |  |  |  |  |  | 889 | I<sup>(12)</sup> | By ESOP |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Restricted Stock Units | <sup>(1)(2)</sup> |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | Common stock | 3232 |  | 3232 | D |  |
| Restricted Stock Units | <sup>(1)(2)</sup> |  |  |  |  |  |  | <sup>(4)</sup> | <sup>(4)</sup> | Common stock | 11241 |  | 11241 | D |  |
| Restricted Stock Units | <sup>(1)(2)</sup> |  |  |  |  |  |  | <sup>(5)</sup> | <sup>(5)</sup> | Common stock | 34544 |  | 34544 | D |  |
| Restricted Stock Units | <sup>(1)(2)</sup> |  |  |  |  |  |  | <sup>(6)</sup> | <sup>(6)</sup> | Common stock | 33721 |  | 33721 | D |  |
| Restricted Stock Units | <sup>(1)(2)</sup> |  |  |  |  |  |  | <sup>(7)</sup> | <sup>(7)</sup> | Common stock | 42221 |  | 42221 | D |  |
| Restricted Stock Units | <sup>(8)</sup> |  |  |  |  |  |  | <sup>(9)</sup> | <sup>(9)</sup> | Common stock | 17215<sup>(13)</sup> |  | 17215<sup>(13)</sup> | D |  |
| Restricted Stock Units | <sup>(2)</sup> | 2026-03-03 |  | M |  |  | 34065 | <sup>(10)</sup> | <sup>(10)</sup> | Common stock | 34065 | $0 | 120023 | D |  |
| Restricted Stock Units | <sup>(8)</sup> |  |  |  |  |  |  | <sup>(11)</sup> | <sup>(11)</sup> | Common stock | 24340 |  | 24340 | D |  |

---

### Footnotes:

(1) 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.

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

(3) This award for 3,232 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.

(4) This award for 11,241 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 final tranche of this Company RSU award vested on February 15, 2025. The reporting person elected to defer receipt of common stock issuable upon vesting except for shares withheld for tax obligations.

(5) 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. Subject to continued service, the remaining tranches will vest on April 28 of 2025 and 2026, respectively. The reporting person elected to defer receipt of common stock issuable upon vesting except for shares withheld for tax obligations.

(6) 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.

(7) This award for 42,221 Company RSUs replaced an award of Cambridge PRSUs that Cambridge granted to the reporting person on April 28, 2023. Subject to continued service, the Company RSU award provides 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.

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

(9) 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.

(10) 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.

(11) 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.

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

(13) The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently overstated the amount of derivative securities beneficially owned by 8,606 shares. The amount shown in this table corrects the inadvertent clerical error.

**Signature:** /s/ Kathleen R. Henry, by Power of Attorney  
**Date:** 2026-03-05

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**