401(k) · DOL Form 5500 · 2022

Radiation Monitoring Devices, Inc. 401(k) Plan

Data updated 2026-08-25

$17M
Total assets Small plan by assets
93
Participants Small participant base
74th
Percentile by assets National rank
$179,690
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

$17M in assets, 93 participants

Radiation Monitoring Devices, Inc.'s Dynasil Companies 401(k) Plan reported $17M in total assets and 93 participants in its 2022 DOL Form 5500 filing, ranking in the 74th 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.

  • #13,247 in Manufacturing (20,602 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 $17M / 93 participants.

#13,247
in Manufacturing (20,602 peers)
-32.8%
assets change YoY

The plan reported a net loss of $8M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

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 2022 · DOL Form 5500

$16,711,145 Top 26% higher than 74% 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

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

Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Dynasil Companies 401(k) Plan is a small filing (93 participants) on this national headcount ladder.

Plan-year Form 5500 strip

Filing strip 262897516 · Radiation Monitoring Devices, Inc. PY 2022 · 401(k)

Dynasil Companies 401(k) Plan · $17M · 93 · 74th

  • ASSETS $17M
  • PCT 93
  • EIN 74th
  • RANK 401(k)
  • PHOTO near Triangle Package Machinery Company Office 401(k) Plan
  • IND ind #13247

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$17MTriangle Package Machinery Company Office 401(k) PlanTriangle Package Machinery C…$17MLbx Employees' Savings & Investment PlanLbx Employees' Savings & Inv…$17MFacc Premium Deferred 401(k) PlanFacc Premium Deferred 401(k)…$17MRevere Plastics Systems, LLC 401(k) PlanRevere Plastics Systems, LLC…$17M
End-of-year total assets ($M) among Dynasil Companies 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2022.

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 (2022)

Total Assets (Beginning of Year)$25M
Net Assets (End of Year)$17M
Net Income-$8M
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. -200000200004000060000 -100102030 Total assets ($B) Participants Dynasil Companies 401(k) Plan, Total assets ($B): 0.016711145 · Participants: 93Dynasil Companies 401(k) 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
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 Triangle Package Machinery Company Office 401(k) Plan in IL ($17M); by covered participants it is Homestead Farm and Lawn LLC 401(k) Plan in TN (93 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (93 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 Dynasil Companies 401(k) Plan assets move in 2022? ▼
Dynasil Companies 401(k) Plan contracted severely - down 32.8% during 2022, from $25M to $17M. Reported net income was -$8M.
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 Triangle Package Machinery Company Office 401(k) Plan in IL ($17M, 105 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 Homestead Farm and Lawn LLC 401(k) Plan in TN (93 participants, $332K 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 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.