# EDGAR Filing Document

**Accession Number:** 0001221397
**File Stem:** 0001193125-25-274237
**Filing Date:** 2025-11
**Character Count:** 6301
**Document Hash:** 851911d8c701a05c36c0f08e3c00a8f6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-274237.hdr.sgml**: 20251110

**ACCESSION NUMBER**: 0001193125-25-274237

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251101

**FILED AS OF DATE**: 20251110

**DATE AS OF CHANGE**: 20251110

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** CASEY JOSEPH F
- **CENTRAL INDEX KEY:** 0001221397

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39610
- **FILM NUMBER:** 251466265

**MAIL ADDRESS:**
- **STREET 1:** C/O HARBORONE BANCORP, INC.
- **STREET 2:** 770 OAK STREET
- **CITY:** BROCKTON
- **STATE:** MA
- **ZIP:** 02301
**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 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>CASEY JOSEPH F<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. Issuer Name and Ticker or Trading Symbol**<br>Eastern Bankshares, Inc. [ EBC ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2025-11-01 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<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 Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 36112<sup>(1)</sup> | D |  |
| Common Stock | 107160<sup>(1)</sup> | I | By Spouse |
| Common Stock | 83962<sup>(1)</sup> | I | By Trust |
| Common Stock | 19732<sup>(1)</sup> | I | Rollover IRA |
| Common Stock | 24772<sup>(1)</sup> | I | Traditional IRA |
| Common Stock | 11704<sup>(1)</sup> | I | ESOP |
| Common Stock | 43192<sup>(1)</sup> | I | 401(k) |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Stock Option (Right to Buy) | <sup>(2)</sup> | <sup>(2)</sup> | Common Stock | 118947<sup>(3)</sup> | 11.74<sup>(4)</sup> | D |  |
| Stock Option (Right to Buy) | <sup>(2)</sup> | <sup>(2)</sup> | Common Stock | 101912<sup>(3)</sup> | 12.80<sup>(4)</sup> | D |  |
| Stock Option (Right to Buy) | <sup>(2)</sup> | <sup>(2)</sup> | Common Stock | 101912<sup>(3)</sup> | 13.38<sup>(4)</sup> | D |  |

---

### Footnotes:

(1) Pursuant to the terms of the Agreement and Plan of Merger dated April 24, 2025 among Eastern Bankshares, Inc. ("Eastern"), Eastern Bank, HarborOne Bancorp, Inc. (HarborOne"), and HarborOne Bank (the "Merger Agreement"), upon the merger of HarborOne into Eastern, effective November 1, 2025 (the "Merger"), each share of HarborOne common stock was converted into the right to receive, at the election of the holder, either (i) $12.00 in cash or (ii) 0.765 shares of Eastern common stock (the "Exchange Ratio"), subject to certain proration provisions contained in the Merger Agreement.

(2) Pursuant to the terms of the Merger Agreement, the stock option must be exercised within no later than February 1, 2026 (i.e., three (3) months from the time reporting person's employment as an executive of HarborOne was terminated).

(3) Pursuant to the Merger Agreement, each outstanding and unexercised option to purchase shares of HarborOne common stock was converted into an option to purchase shares of Eastern common stock by multiplying the number of shares by the Exchange Ratio (rounded down to the nearest whole share).

(4) Pursuant to the Merger Agreement, the exercise price per share of each converted option was determined by dividing the exercise price of the HarborOne stock option  by the Exchange Ratio (rounded up to the nearest whole cent).

**Signature:** /s/ Kathleen R. Henry, by Power of Attorney  
**Date:** 2025-11-10

### 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.**