SEC ownership of HarborOne Bancorp, Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001769617.

Comparable stake leader

T. Rowe Price Investment Management, Inc.

Disclosed value leader

T. Rowe Price Investment Management, Inc.

Comparable rows

5/14

Latest evidence

30 Sep 2025

Top shareholders Insider holders Latest transactions

Parsed ownership sources: 13D/G and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: T. Rowe Price Investment Management, Inc.
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 5 of 14
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: T. Rowe Price Investment Management, Inc.
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 30 Sep 2025
Freshness: Most recent filing date in this holder set
Issuer CIK: 0001769617
Issuer location: Brockton, MA

Ownership snapshot

Top shareholders of HarborOne Bancorp, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

T. Rowe Price Investment ...

Disclosed value leader

T. Rowe Price Investment ...

Comparable rows

5/14

Latest evidence

30 Sep 2025

13D/G 3/4/5 Lead comparable stake: 10% 9 rows are not safely comparable across share classes. 13D/G row: T. Rowe Price Investment Management, Inc. Showing 1-8 of 14 holder rows.

Quick read

T. Rowe Price Investment Management, Inc. leads the comparable SEC ownership view at 10%.

5 of 14 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens T. Rowe Price Investment Management, Inc.'s linked filing trail.

Comparable ownership Top 5

T. Rowe Price Investment Manageme... 10%

HarborOne Bank Employee Stock Own... 10%

GLAZER CAPITAL, LLC 7%

VANGUARD GROUP INC 5.2%

ALLIANCEBERNSTEIN L.P. 4.9%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 14 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
T. Rowe Price Investment Management, Inc.	13D/G 13D/G	10% Reported 13D/G · 30 Jun 2025	$54,690,854 4,475,520 shares	$0	30 Jun 2025
HarborOne Bank Employee Stock Ownership Trust	13D/G 13D/G	10% Reported 13D/G · 31 Dec 2024	$49,895,909 4,411,663 shares	$0	31 Dec 2024
GLAZER CAPITAL, LLC	13D/G 13D/G	7% Reported 13D/G · 30 Sep 2025	$41,001,443 3,014,812 shares	+$9,940,716	30 Sep 2025
VANGUARD GROUP INC	13D/G The Vanguard Group 13D/G	5.2% Reported 13D/G · 30 Jun 2025	$25,973,423 2,223,752 shares	+$697,051	30 Jun 2025
ALLIANCEBERNSTEIN L.P.	13D/G 13D/G	4.9% Reported 13D/G · 30 Sep 2024	$24,635,261 2,178,184 shares	$0	30 Sep 2024
James W. Blake	3/4/5 Chief Executive Officer, Director 3/4/5	— denominator unverified	$2,263,569 291,697 shares	—	01 Mar 2023
Gordon Jezard	3/4/5 Director 3/4/5	— denominator unverified	$537,558 69,273 shares	—	01 Mar 2024
Joseph F. Barry	3/4/5 Director 3/4/5	— denominator unverified	$467,897 60,296 shares	—	01 Mar 2024

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

No eligible buy or sell activity is available for this window. No eligible Buy or Sell transactions are available in this dataset since 02 Nov 2025.

Buys

Insiders: 0

Sells

Insiders: 0

Net

Shares: 0

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 0 Shares: 0

Window (months)	Buy value	Sell value	Net value
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 27 reporting-owner rows connected to HarborOne Bancorp, Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

James W. Blake

Net 12M change

Latest report

01 Nov 2025

Name	Relationship	Holdings Value	Valuation	Report Date
James W. Blake	Chief Executive Officer, Director	$2,263,569	Mixed	01 Mar 2023
Gordon Jezard	Director	$537,558	Mixed	01 Mar 2024
Joseph F. Barry	Director	$467,897	Mixed	01 Mar 2024
Linda Simmons	Evp, Cfo	$425,822	Mixed	04 May 2023
David B. Reilly	EVP, Operations	$283,892	Mixed	31 Mar 2023
Patricia M. Williams	SVP, Human Resource Officer	$272,648	Mixed	01 Mar 2022
Jean Levesque	FVP, Interim CFO	$114,729	Mixed	01 Mar 2024
Kevin M. Hamel	SVP, Chief Information Officer	$85,298	Mixed	28 Oct 2022
Paul Roukey	FVP, Interim PAO	$81,063	Mixed	06 Mar 2024
David P. Frenette	Director	$0	Mixed	01 Nov 2025
Andreana Santangelo	Director	$0	Mixed	01 Nov 2025
Susan Bugnacki Stewart	SVP, Chief HR Officer	$0	Mixed	01 Nov 2025
Joseph E. McQuade	EVP, CER Officer	$0	Mixed	01 Nov 2025
Inez Friedman-Boyce	EVP, Chief Legal Officer	$0	Mixed	01 Nov 2025
Brent W. Grable	EVP, Chief Information Officer	$0	Mixed	01 Nov 2025
William A. Payne	Director	$0	Mixed	01 Nov 2025
David E. Tryder	EVP, Chief Marketing Officer	$0	Mixed	01 Nov 2025
H. Scott Sanborn	EVP, Chief Lending Officer	$0	Mixed	01 Nov 2025
Brenda Carolyn Diepold	EVP, Chief Banking Officer	$0	Mixed	01 Nov 2025
Stephen W. Finocchio	EVP, Chief Financial Officer	$0	Mixed	01 Nov 2025

Recent insider transactions for HarborOne Bancorp, Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
No insider transactions were found in the last 12 months for this issuer.

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