401(k) · DOL Form 5500 · 2024

Brookline Bancorp, Inc. 401(k) Plan

Data updated 2026-08-25

$169M
Total assets Near avg plan size
971
Participants Near avg headcount
94th
Percentile by assets National rank
$173,775
Avg per participant Above avg balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Brookline Bancorp 401(k) Plan · Sponsored by Brookline Bancorp, Inc. · Massachusetts · Finance & Insurance

$169M in assets, 971 participants

Brookline Bancorp, Inc.'s Brookline Bancorp 401(k) Plan reported $169M in total assets and 971 participants in its 2024 DOL Form 5500 filing, ranking in the 94th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #7,675 in Finance & Insurance (8,549 peers)

Where Brookline Bancorp 401(k) Plan sits by assets

Brookline Bancorp 401(k) Plan sits in the top 10% of all filed plans by assets, $169M for 971 participants (~$173,775/participant), up 15.5% in 2024.

#7,675
in Finance & Insurance (8,549 peers)
+15.5%
assets growth YoY
1.7×
vs typical plan assets (national mean)

Brookline Bancorp 401(k) Plan's outsized position by total assets

Brookline Bancorp 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$168,735,553 Top 6% higher than 94% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Brookline Bancorp 401(k) Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Brookline Bancorp 401(k) Plan sits mid-pack in the medium band (971 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Brookline Bancorp 401(k) Plan reported net income fell from $35M in the plan year 2023 filing to $23M in the plan year 2024 filing.
  • Brookline Bancorp 401(k) Plan end-of-year assets rose from $146M in the plan year 2023 filing to $169M in the plan year 2024 filing.
  • Brookline Bancorp 401(k) Plan reported participants rose from 841 in the plan year 2023 filing to 971 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 043402944 · Brookline Bancorp, Inc. PY 2024 · 401(k)

Brookline Bancorp 401(k) Plan · $169M · 971 · 94th

  • IND $169M
  • EOY 971
  • 5500 94th
  • ASSETS 401(k)
  • PCT near Bdt & Msd Partners Retirement Savings Plan
  • EIN ind #7675

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Finance & Insurance retirement plans → · Plans in Massachusetts →

Brookline Bancorp 401(k) Plan in the asset neighbourhood

California Times 401(k) Plan$169MServicetitan 401(k) Plan$169MBrookline Bancorp 401(k) Plan$169MBdt & Msd Partners Retirement Savings PlanBdt & Msd Partners Retiremen…$169MVoya 401(k) Plan for Vriac AgentsVoya 401(k) Plan for Vriac A…$169M
End-of-year total assets ($M) among Brookline Bancorp 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)$146M
Net Assets (End of Year)$169M
Net Income$23M
Employer EIN043402944
Plan Effective Date1996-05-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Brookline Bancorp, Inc.)

Sponsor-wide plan assets over time

All Brookline Bancorp, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$176M 45.957666231472146% vs 2022
2024 filing year
$100M$120M$140M$160M$180M$200M 202220232024 $121M $176M ▲ +46.0%
Year Plans Participants Total Assets
2022 2 1,499 $121M
2023 2 1,555 $153M
2024 2 1,040 $176M

Nearby 401(k) Plans in Massachusetts

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Brookline Bancorp 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Brookline Bancorp 401(k) Plan, Total assets ($B): 0.168735553 · Participants: 971Brookline Bancorp 401(k) PlanFidelity Retirement Savings Plan, Total assets ($B): 34.201609937 · Participants: 66907Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 11.352606499 · Participants: 34618Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 7.720373045 · Participants: 14762Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 6.775289067 · Participants: 20639Boston Scientific Corporation 401(k) Retirement Savings PlanState Street Salary Savings Program, Total assets ($B): 6.532301643 · Participants: 12777State Street Salary Savings Program
Brookline Bancorp 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Brookline Bancorp 401(k) Plan side-by-side with 3 peers →

Brookline Bancorp 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Bdt & Msd Partners Retirement Savings Plan in IL ($169M); by covered participants it is Cefcu Deferred Compensation Plan and Trust in IL (971 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($169M here).

Similar participant headcount

Nearest other-state filings by covered participants (971 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Brookline Bancorp 401(k) Plan assets move in 2024? ▼
Brookline Bancorp 401(k) Plan grew sharply - up 15.5% during 2024, from $146M to $169M. Reported net income was $23M.
How have Brookline Bancorp, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Brookline Bancorp, Inc.'s sponsor-wide assets grew 46.0%, from $121M to $176M.
Where does Brookline Bancorp 401(k) Plan rank by assets among Form 5500 filers? ▼
Brookline Bancorp 401(k) Plan ranks in the 94th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 10% of all filed plans by assets).
Which 401(k) plans are similar in size to Brookline Bancorp 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Bdt & Msd Partners Retirement Savings Plan in IL ($169M, 409 participants).
Which 401(k) plans cover a similar participant headcount to Brookline Bancorp 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Cefcu Deferred Compensation Plan and Trust in IL (971 participants, $145M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 043402944.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.