401(k) · DOL Form 5500 · 2024

Radiation Monitoring Devices, Inc. 401(k) Plan

Data updated 2026-08-25

$20M
Total assets Small plan by assets
83
Participants Small participant base
70th
Percentile by assets National rank
$243,419
Avg per participant Above avg balance/head
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Official DOL plan name: Dynasil Companies 401(k) Plan · Sponsored by Radiation Monitoring Devices, Inc. · Massachusetts · Manufacturing

$20M in assets, 83 participants

Radiation Monitoring Devices, Inc.'s Dynasil Companies 401(k) Plan reported $20M in total assets and 83 participants in its 2024 DOL Form 5500 filing, ranking in the 70th 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.

  • #10,669 in Manufacturing (17,777 peers)

Radiation Monitoring Devices, Inc. multi-year trail

Radiation Monitoring Devices, Inc.'s plans moved +20.9% in assets from 2022 to 2024; this filing shows Dynasil Companies 401(k) Plan at $20M / 83 participants.

#10,669
in Manufacturing (17,777 peers)
+9.2%
assets growth YoY

Dynasil Companies 401(k) Plan's outsized position by total assets

Dynasil Companies 401(k) Plan vs every filed plan by assets

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

$20,203,798 Top 30% higher than 70% 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

Dynasil Companies 401(k) Plan among smaller filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Dynasil Companies 401(k) Plan is a small filing (83 participants) on this national headcount ladder.

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Dynasil Companies 401(k) Plan reported participants fell from 92 in the plan year 2023 filing to 83 in the plan year 2024 filing.
  • Dynasil Companies 401(k) Plan end-of-year assets rose from $19M in the plan year 2023 filing to $20M in the plan year 2024 filing.
  • Dynasil Companies 401(k) Plan reported net income fell from $2M in the plan year 2023 filing to $2M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 262897516 · Radiation Monitoring Devices, Inc. PY 2024 · 401(k)

Dynasil Companies 401(k) Plan · $20M · 83 · 70th

  • VS-ST $20M
  • VS-ST 83
  • VS-ST 70th
  • VS-ST 401(k)
  • VS-ST near E & T Plastic Manufacturing Co. 401(k) Profit Sharing Plan
  • VS-ST ind #10669

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 Massachusetts →

Dynasil Companies 401(k) Plan in the asset neighbourhood

Dynasil Companies 401(k) Plan$20ME & T Plastic Manufacturing Co. 401(k) Profit Sharing PlanE & T Plastic Manufacturing …$20MHudson Housing Capital LLC 401(k) Profit Sharing PlanHudson Housing Capital LLC 4…$20MM & J Engineering 401(k) Plan$20MHurricanes Holdings, LLC 401(k) PlanHurricanes Holdings, LLC 401…$20M
End-of-year total assets ($M) among Dynasil Companies 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Radiation Monitoring Devices, Inc. multi-year asset trail

Sponsor-wide plan assets over time

All Radiation Monitoring Devices, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$20M 20.900141791600753% vs 2022
2024 filing year
$16M$18M$20M$22M 202220232024 $16.7M $20.2M ▲ +20.9%
Year Plans Participants Total Assets
2022 1 93 $17M
2023 1 92 $19M
2024 1 83 $20M

Radiation Monitoring Devices, Inc. filing trail (2024)

Total Assets (Beginning of Year)$19M
Net Assets (End of Year)$20M
Net Income$2M
Employer EIN262897516
Plan Effective Date1975-07-01
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Massachusetts

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

Dynasil Companies 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Dynasil Companies 401(k) Plan, Total assets ($B): 0.020203798 · Participants: 83Dynasil Companies 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
Dynasil Companies 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Dynasil Companies 401(k) Plan side-by-side with 3 peers →

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

Outside Massachusetts, the nearest 401(k) by assets is E & T Plastic Manufacturing Co. 401(k) Profit Sharing Plan in NY ($20M); by covered participants it is Pepsi-Cola Bottling Co. of Davenport 401(k) Employee Benefit Plan in IA (83 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (83 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 Dynasil Companies 401(k) Plan assets move in 2024? ▼
Dynasil Companies 401(k) Plan grew at a solid clip - up 9.2% during 2024, from $19M to $20M. Reported net income was $2M.
How have Radiation Monitoring Devices, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Radiation Monitoring Devices, Inc.'s sponsor-wide assets grew 20.9%, from $17M to $20M.
Which 401(k) plans are similar in size to Dynasil Companies 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is E & T Plastic Manufacturing Co. 401(k) Profit Sharing Plan in NY ($20M, 108 participants).
Which 401(k) plans cover a similar participant headcount to Dynasil Companies 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Pepsi-Cola Bottling Co. of Davenport 401(k) Employee Benefit Plan in IA (83 participants, $22M 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 262897516.

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.