Comparable stake leader
STATE STREET CORP
SEC ownership of BROOKLINE BANCORP INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001049782.
Disclosed value leader
STATE STREET CORP
Comparable rows
1/10
Latest evidence
31 Mar 2025
- Parsed ownership sources
-
13D/G and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
STATE STREET CORP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
1 of 10
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
STATE STREET CORP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2025
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001049782
- Issuer location
- Boston, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BROOKLINE 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
STATE STREET CORP
Disclosed value leader
STATE STREET CORP
Comparable rows
1/10
Latest evidence
31 Mar 2025
13D/G
3/4/5
Lead comparable stake: 4.7%
9 rows are not safely comparable across share classes.
13D/G row: STATE STREET CORP
Showing 1-8 of 10 holder rows.
Quick read
STATE STREET CORP leads the comparable SEC ownership view at 4.7%.
1 of 10 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 STATE STREET CORP's linked filing trail.
Comparable ownership
Top 1
STATE STREET CORP
4.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 10 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| STATE STREET CORP |
13D/G
STATE STREET CORPORATION
|
4.7%
|
$43,219,532
4,212,430 shares
|
-$2,897,229 | 31 Mar 2025 |
| John L. Hall II |
3/4/5
Director
|
—
class O/S missing
|
$2,041,331
223,585 shares
|
— | 02 Aug 2023 |
| Joseph J. Slotnik |
3/4/5
Director
|
—
class O/S missing
|
$1,788,960
195,943 shares
|
— | 02 Aug 2023 |
| Wilde Peter O |
3/4/5
Director
|
—
class O/S missing
|
$1,753,909
192,104 shares
|
— | 02 Aug 2023 |
| Charles H. Peck |
3/4/5
Director
|
—
class O/S missing
|
$1,385,981
151,805 shares
|
— | 02 Aug 2023 |
| David C. Chapin |
3/4/5
Director
|
—
class O/S missing
|
$937,870
102,724 shares
|
— | 02 Aug 2023 |
| M. Robert Rose |
3/4/5
Chief Credit Officer
|
—
class O/S missing
|
$904,966
99,120 shares
|
— | 17 Aug 2022 |
| James M. Cosman |
3/4/5
Chief Operations Officer
|
—
class O/S missing
|
$704,909
72,972 shares
|
— | 12 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
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 26 Sep 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 25 reporting-owner rows connected to BROOKLINE BANCORP INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
25
Largest Forms 3/4/5 holder
John L. Hall II
Net 12M change
$0
Latest report
01 Sep 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John L. Hall II | Director | $2,041,331 | Mixed | 02 Aug 2023 | ||
| Joseph J. Slotnik | Director | $1,788,960 | Mixed | 02 Aug 2023 | ||
| Wilde Peter O | Director | $1,753,909 | Mixed | 02 Aug 2023 | ||
| Charles H. Peck | Director | $1,385,981 | Mixed | 02 Aug 2023 | ||
| David C. Chapin | Director | $937,870 | Mixed | 02 Aug 2023 | ||
| M. Robert Rose | Chief Credit Officer | $904,966 | Mixed | 17 Aug 2022 | ||
| James M. Cosman | Chief Operations Officer | $704,909 | Mixed | 12 Mar 2024 | ||
| John J. Doyle Jr. | Director | $517,379 | Mixed | 25 Aug 2023 | ||
| John A. Hackett | Director | $457,395 | Mixed | 07 Nov 2023 | ||
| Bogdan Nowak | Director | $0 | Mixed | 01 Sep 2025 | ||
| William C. Tsonos | CEO Bank Rhode Island | $0 | Mixed | 01 Sep 2025 | ||
| Thomas J. Hollister | Director | $0 | Mixed | 01 Sep 2025 | ||
| Janytra M. Brooks | Chief Human Resources Officer | $0 | Mixed | 01 Sep 2025 | ||
| Merrill W. Sherman | Director | $0 | Mixed | 01 Sep 2025 | ||
| Michael W. McCurdy | Co-President & COO | $0 | Mixed | 01 Sep 2025 | ||
| Joanne B. Chang | Director | $0 | Mixed | 01 Sep 2025 | ||
| Darryl J. Fess | CEO, Brookline Bank | $0 | Mixed | 01 Sep 2025 | ||
| John M. Pereira | Director | $0 | Mixed | 01 Sep 2025 | ||
| Carl M. Carlson | Co-President & CFO | $0 | Mixed | 01 Sep 2025 | ||
| Marissa S. Martin | General Counsel | $0 | Mixed | 01 Sep 2025 |
Recent insider transactions for BROOKLINE 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.