401(k) · DOL Form 5500 · 2023

Millstone Medical Outsourcing, LLC 401(k) Plan

Data updated 2026-08-25

$13M
Total assets Small plan by assets
549
Participants Below avg headcount
65th
Percentile by assets National rank
$24,370
Avg per participant Low balance/head
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Official DOL plan name: Millstone Medical Outsourcing, LLC 401(k) Retirement Plan · Sponsored by Millstone Medical Outsourcing, LLC · Massachusetts · Administrative & Support Services

$13M in assets, 549 participants

Millstone Medical Outsourcing, LLC's Millstone Medical Outsourcing, LLC 401(k) Retirement Plan reported $13M in total assets and 549 participants in its 2023 DOL Form 5500 filing, ranking in the 65th 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.

  • #3,551 in Administrative & Support Services (4,372 peers)

Millstone Medical Outsourcing, LLC multi-year trail

Millstone Medical Outsourcing, LLC's plans moved +57.9% in assets from 2022 to 2024; this filing shows Millstone Medical Outsourcing, LLC 401(k) Retirement Plan at $13M / 549 participants.

#3,551
in Administrative & Support Services (4,372 peers)
+32.2%
assets growth YoY

Millstone Medical Outsourcing, LLC 401(k) Retirement Plan's mid-pack asset rank among Administrative & Support Services and all filers

Millstone Medical Outsourcing, LLC 401(k) Retirement Plan vs every filed plan by assets

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

$13,379,333 Top 35% higher than 65% 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

Millstone Medical Outsourcing, LLC 401(k) Retirement 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. Millstone Medical Outsourcing, LLC 401(k) Retirement Plan sits mid-pack in the medium band (549 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Millstone Medical Outsourcing, LLC 401(k) Retirement Plan reported net income rose from -$618K in the plan year 2022 filing to $3M in the plan year 2023 filing.
  • Millstone Medical Outsourcing, LLC 401(k) Retirement Plan end-of-year assets rose from $10M in the plan year 2022 filing to $13M in the plan year 2023 filing.
  • Millstone Medical Outsourcing, LLC 401(k) Retirement Plan reported participants rose from 498 in the plan year 2022 filing to 549 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Form 5500 schedule snapshot

Filing strip 841654439 · Millstone Medical Outsourcing, LLC PY 2023 · 401(k)

Millstone Medical Outsourcing, LLC 401(k) Retirement Plan · $13M · 549 · 65th

  • ASSETS $13M
  • ASSETS 549
  • ASSETS 65th
  • ASSETS 401(k)
  • ASSETS near Unitek Employees Retirement Savings Plan
  • ASSETS ind #3551

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 Administrative & Support Services retirement plans → · Plans in Massachusetts →

Millstone Medical Outsourcing, LLC 401(k) Retirement Plan in the asset neighbourhood

Millstone Medical Outsourcing, LLC 401(k) Retirement PlanMillstone Medical Outsourcin…$13MUnitek Employees Retirement Savings PlanUnitek Employees Retirement …$13MReston Association Retirement Savings PlanReston Association Retiremen…$13MIngram & Co., Inc. 401(k) PlanIngram & Co., Inc. 401(k) Pl…$13MCommunity First Bancorporation, Inc. Employee Stock Ownership and Savings PlanCommunity First Bancorporati…$13M
End-of-year total assets ($M) among Millstone Medical Outsourcing, LLC 401(k) Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Millstone Medical Outsourcing, LLC multi-year asset trail

Sponsor-wide plan assets over time

All Millstone Medical Outsourcing, LLC plans reported in each filing year

Latest sponsor-wide plan assets
$16M 57.91648514902368% vs 2022
2024 filing year
$8M$10M$12M$14M$16M$18M 202220232024 $10.1M $16M ▲ +57.9%
Year Plans Participants Total Assets
2022 1 498 $10M
2023 1 549 $13M
2024 1 578 $16M

Millstone Medical Outsourcing, LLC filing trail (2023)

Total Assets (Beginning of Year)$10M
Net Assets (End of Year)$13M
Net Income$3M
Employer EIN841654439
Plan Effective Date2008-01-01
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Massachusetts

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

Millstone Medical Outsourcing, LLC 401(k) Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Millstone Medical Outsourcing, LLC 401(k) Retirement Plan, Total assets ($B): 0.013379333 · Participants: 549Millstone Medical Outsourcing, LLC 401(k) Retirement PlanFidelity Retirement Savings Plan, Total assets ($B): 28.649852331 · Participants: 62289Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 10.556596852 · Participants: 37052Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 6.829912863 · Participants: 14094Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 5.786107181 · Participants: 19881Boston Scientific Corporation 401(k) Retirement Savings PlanPhilips North America 401(k) Plan, Total assets ($B): 5.779286156 · Participants: 19120Philips North America 401(k) Plan
Millstone Medical Outsourcing, LLC 401(k) Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Millstone Medical Outsourcing, LLC 401(k) Retirement Plan side-by-side with 3 peers →

Millstone Medical Outsourcing, LLC 401(k) Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Unitek Employees Retirement Savings Plan in PA ($13M); by covered participants it is Brownstein Hyatt Farber Schreck Retirement Plan in CO (549 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (549 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 Millstone Medical Outsourcing, LLC 401(k) Retirement Plan assets move in 2023? ▼
Millstone Medical Outsourcing, LLC 401(k) Retirement Plan surged - up 32.2% during 2023, from $10M to $13M. Reported net income was $3M.
How have Millstone Medical Outsourcing, LLC plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Millstone Medical Outsourcing, LLC's sponsor-wide assets grew 57.9%, from $10M to $16M.
Which 401(k) plans are similar in size to Millstone Medical Outsourcing, LLC 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by assets is Unitek Employees Retirement Savings Plan in PA ($13M, 537 participants).
Which 401(k) plans cover a similar participant headcount to Millstone Medical Outsourcing, LLC 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Brownstein Hyatt Farber Schreck Retirement Plan in CO (549 participants, $230M 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 841654439.

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.