401(k) · DOL Form 5500 · 2023

Proton Energy Systems, Inc. 401(k) Plan

Data updated 2026-08-25

$23M
Total assets Small plan by assets
176
Participants Small participant base
75th
Percentile by assets National rank
$131,163
Avg per participant Near avg balance/head
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Official DOL plan name: Proton Energy Systems, Inc. 401(k) Plan · Sponsored by Proton Energy Systems, Inc. · Connecticut · Manufacturing

$23M in assets, 176 participants

Proton Energy Systems, Inc.'s Proton Energy Systems, Inc. 401(k) Plan reported $23M in total assets and 176 participants in its 2023 DOL Form 5500 filing, ranking in the 75th 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.

  • #12,299 in Manufacturing (18,722 peers)

Coverage in Connecticut

Proton Energy Systems, Inc. 401(k) Plan covers 176 participants in Connecticut, about 25% of the average Connecticut filer (state average ~718 per filing). Assets: $23M.

#12,299
in Manufacturing (18,722 peers)
+24.4%
assets growth YoY
0.2×
vs typical plan assets (national mean)

Proton Energy Systems, Inc. 401(k) Plan's outsized position by total assets

Proton Energy Systems, Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$23,084,697 Top 25% higher than 75% of 127,068 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 2023

Proton Energy Systems, Inc. 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Proton Energy Systems, Inc. 401(k) Plan sits mid-pack in the medium band (176 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Proton Energy Systems, Inc. 401(k) Plan reported net income rose from -$3M in the plan year 2022 filing to $5M in the plan year 2023 filing.
  • Proton Energy Systems, Inc. 401(k) Plan end-of-year assets rose from $19M in the plan year 2022 filing to $23M in the plan year 2023 filing.
  • Proton Energy Systems, Inc. 401(k) Plan reported participants rose from 144 in the plan year 2022 filing to 176 in the plan year 2023 filing.

See the national 2022→2023 release diff →

DOL schedule card

Filing strip 611846104 · Proton Energy Systems, Inc. PY 2023 · 401(k)

Proton Energy Systems, Inc. 401(k) Plan · $23M · 176 · 75th

  • VS-ST $23M
  • VS-ST 176
  • VS-ST 75th
  • VS-ST 401(k)
  • VS-ST near Anne Carlsen Center 401(k) Plan
  • VS-ST ind #12299

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 Manufacturing retirement plans → · Plans in Connecticut →

Proton Energy Systems, Inc. 401(k) Plan in the asset neighbourhood

Anne Carlsen Center 401(k) PlanAnne Carlsen Center 401(k) P…$23MPueblo of Laguna Commercial Enterprises 401(k) Profit Sharing Plan and TrustPueblo of Laguna Commercial …$23MReify Health, Inc. Retirement Savings PlanReify Health, Inc. Retiremen…$23MProton Energy Systems, Inc. 401(k) PlanProton Energy Systems, Inc. …$23MKibo Software 401(k) Plan$23M
End-of-year total assets ($M) among Proton Energy Systems, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Connecticut filing particulars

Total Assets (Beginning of Year)$19M
Net Assets (End of Year)$23M
Net Income$5M
Employer EIN611846104
Plan Effective Date2004-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Proton Energy Systems, Inc.)

Sponsor-wide plan assets over time

All Proton Energy Systems, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$28M 50.96710186852319% vs 2022
2024 filing year
$15M$20M$25M$30M 202220232024 $18.6M $28M ▲ +51.0%
Year Plans Participants Total Assets
2022 1 144 $19M
2023 1 176 $23M
2024 1 196 $28M

Nearby 401(k) Plans in Connecticut

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

Proton Energy Systems, Inc. 401(k) Plan vs. nearby 401(k) plans in Connecticut, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -200204060 Total assets ($B) Participants Proton Energy Systems, Inc. 401(k) Plan, Total assets ($B): 0.023084697 · Participants: 176Proton Energy Systems, Inc. 401(k) PlanRtx Savings Plan, Total assets ($B): 52.759784 · Participants: 123037Rtx Savings PlanCiti Retirement Savings Plan, Total assets ($B): 20.653030659 · Participants: 77865Citi Retirement Savings PlanThe Hartford Investment and Savings Plan, Total assets ($B): 6.478512 · Participants: 18377The Hartford Investment and Savings PlanXerox Corporation Savings Plan, Total assets ($B): 3.948866 · Participants: 10291Xerox Corporation Savings PlanEversource 401(k) Plan, Total assets ($B): 3.751712453 · Participants: 9504Eversource 401(k) Plan
Proton Energy Systems, Inc. 401(k) Plan vs. nearby 401(k) plans in Connecticut, assets vs. participants
Compare Proton Energy Systems, Inc. 401(k) Plan side-by-side with 3 peers →

Proton Energy Systems, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Connecticut, the nearest 401(k) by assets is Anne Carlsen Center 401(k) Plan in ND ($23M); by covered participants it is Red Nucleus Solutions 401(k) Retirement Plan in PA (176 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (176 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Proton Energy Systems, Inc. 401(k) Plan assets move in 2023? ▼
Proton Energy Systems, Inc. 401(k) Plan grew sharply - up 24.4% during 2023, from $19M to $23M. Reported net income was $5M.
How have Proton Energy Systems, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Proton Energy Systems, Inc.'s sponsor-wide assets grew 51.0%, from $19M to $28M.
Where does Proton Energy Systems, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼
Proton Energy Systems, Inc. 401(k) Plan ranks in the 75th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Proton Energy Systems, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Anne Carlsen Center 401(k) Plan in ND ($23M, 493 participants).
Which 401(k) plans cover a similar participant headcount to Proton Energy Systems, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Red Nucleus Solutions 401(k) Retirement Plan in PA (176 participants, $18M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 611846104.

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.