401(k) · DOL Form 5500 · 2022

Iso New England Inc. 401(k) Plan

Data updated 2026-08-25

$231M
Total assets Near avg plan size
576
Participants Below avg headcount
96th
Percentile by assets National rank
$401,186
Avg per participant High balance/head
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Official DOL plan name: Iso New England Inc. Supplemental Retirement and Savings Plan · Sponsored by Iso New England Inc. · Massachusetts · Utilities

$231M in assets, 576 participants

Iso New England Inc.'s Iso New England Inc. Supplemental Retirement and Savings Plan reported $231M in total assets and 576 participants in its 2022 DOL Form 5500 filing, ranking in the 96th 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.

  • #555 in Utilities (738 peers)

Utilities sector rank

Within Utilities, Iso New England Inc. Supplemental Retirement and Savings Plan ranks #555 of 738 2022 filers by assets (232% of the sector average)-$231M for 576 participants.

#555
in Utilities (738 peers)
-20.5%
assets change YoY
2.3×
vs typical plan assets (national mean)

The plan reported a net loss of $59M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

Iso New England Inc. Supplemental Retirement and Savings Plan's outsized position by total assets

Iso New England Inc. Supplemental Retirement and Savings Plan vs every filed plan by assets

End-of-year total assets · plan year 2022 · DOL Form 5500

$231,082,925 Top 4% higher than 96% of 139,123 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 2022

Iso New England Inc. Supplemental Retirement and Savings Plan among mid-size filed plans by headcount

Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Iso New England Inc. Supplemental Retirement and Savings Plan sits mid-pack in the medium band (576 participants).

Form 5500 schedule snapshot

Filing strip 043372500 · Iso New England Inc. PY 2022 · 401(k)

Iso New England Inc. Supplemental Retirement and Savings Plan · $231M · 576 · 96th

  • ASSETS $231M
  • PCT 576
  • EIN 96th
  • RANK 401(k)
  • PHOTO near Mitsubishi Motors North America, Inc. 401(k) Savings Plan
  • IND ind #555

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 Utilities retirement plans → · Plans in Massachusetts →

Iso New England Inc. Supplemental Retirement and Savings Plan in the asset neighbourhood

Pacwest Bancorp 401(k) Plan$231MHealthnow New York Inc. Elective 401(k) PlanHealthnow New York Inc. Elec…$231MIso New England Inc. Supplemental Retirement and Savings PlanIso New England Inc. Supplem…$231MMitsubishi Motors North America, Inc. 401(k) Savings PlanMitsubishi Motors North Amer…$231MOlmsted Medical Center Retirement Savings PlanOlmsted Medical Center Retir…$231M
End-of-year total assets ($M) among Iso New England Inc. Supplemental Retirement and Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2022.

Utilities filing particulars

Total Assets (Beginning of Year)$291M
Net Assets (End of Year)$231M
Net Income-$59M
Employer EIN043372500
Plan Effective Date1997-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Iso New England Inc.)

Sponsor-wide plan assets over time

All Iso New England Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$498M 16.758806783519407% vs 2022
2024 filing year
$400M$450M$500M$550M 202220232024 $426M $498M ▲ +16.8%
Year Plans Participants Total Assets
2022 2 900 $426M
2023 2 896 $436M
2024 2 915 $498M

Nearby 401(k) Plans in Massachusetts

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

Iso New England Inc. Supplemental Retirement and Savings Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -200000200004000060000 -50510152025 Total assets ($B) Participants Iso New England Inc. Supplemental Retirement and Savings Plan, Total assets ($B): 0.231082925 · Participants: 576Iso New England Inc. Supplemental Retirement and Savings PlanFidelity Retirement Savings Plan, Total assets ($B): 22.953563448 · Participants: 52036Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 8.79802945 · Participants: 32843Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 5.810585521 · Participants: 13690Massachusetts Institute of Technology Supplemental 401(k) PlanPhilips North America 401(k) Plan, Total assets ($B): 5.180251859 · Participants: 19750Philips North America 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 4.853752256 · Participants: 18359Boston Scientific Corporation 401(k) Retirement Savings Plan
Iso New England Inc. Supplemental Retirement and Savings Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Iso New England Inc. Supplemental Retirement and Savings Plan side-by-side with 3 peers →

Iso New England Inc. Supplemental Retirement and Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Mitsubishi Motors North America, Inc. 401(k) Savings Plan in CA ($231M); by covered participants it is Regents Park, Inc. 401(k) Plan in FL (576 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($231M here).

Similar participant headcount

Nearest other-state filings by covered participants (576 participants); asset peers above are excluded.

DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Iso New England Inc. Supplemental Retirement and Savings Plan assets move in 2022? ▼
Iso New England Inc. Supplemental Retirement and Savings Plan declined sharply - down 20.5% during 2022, from $291M to $231M. Reported net income was -$59M.
How have Iso New England Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Iso New England Inc.'s sponsor-wide assets grew 16.8%, from $426M to $498M.
Where does Iso New England Inc. Supplemental Retirement and Savings Plan rank by assets among Form 5500 filers? ▼
Iso New England Inc. Supplemental Retirement and Savings Plan ranks in the 96th percentile by end-of-year assets among 139,126 plans that reported assets for plan year 2022 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Iso New England Inc. Supplemental Retirement and Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Mitsubishi Motors North America, Inc. 401(k) Savings Plan in CA ($231M, 272 participants).
Which 401(k) plans cover a similar participant headcount to Iso New England Inc. Supplemental Retirement and Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Regents Park, Inc. 401(k) Plan in FL (576 participants, N/A in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2022.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 043372500.

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.