401(k) · DOL Form 5500 · 2024

Onsite Mammography, LLC 401(k) Plan

Data updated 2026-08-25

$14M
Total assets Small plan by assets
449
Participants Below avg headcount
62nd
Percentile by assets National rank
$30,332
Avg per participant Low balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Onsite Mammography LLC 401(k) Plan · Sponsored by Onsite Mammography, LLC · Massachusetts · Healthcare & Social Assistance

$14M in assets, 449 participants

Onsite Mammography, LLC's Onsite Mammography LLC 401(k) Plan reported $14M in total assets and 449 participants in its 2024 DOL Form 5500 filing, ranking in the 62nd 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.

  • #11,428 in Healthcare & Social Assistance (16,916 peers)

Onsite Mammography, LLC multi-year trail

Onsite Mammography, LLC's plans moved +72.7% in assets from 2022 to 2024; this filing shows Onsite Mammography LLC 401(k) Plan at $14M / 449 participants.

#11,428
in Healthcare & Social Assistance (16,916 peers)
+23.3%
assets growth YoY

Onsite Mammography LLC 401(k) Plan's mid-pack asset rank among Healthcare & Social Assistance and all filers

Onsite Mammography LLC 401(k) Plan vs every filed plan by assets

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

$13,619,235 Top 38% higher than 62% 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

Onsite Mammography LLC 401(k) Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Onsite Mammography LLC 401(k) Plan sits mid-pack in the medium band (449 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Onsite Mammography LLC 401(k) Plan end-of-year assets rose from $11M in the plan year 2023 filing to $14M in the plan year 2024 filing.
  • Onsite Mammography LLC 401(k) Plan reported participants rose from 367 in the plan year 2023 filing to 449 in the plan year 2024 filing.
  • Onsite Mammography LLC 401(k) Plan reported net income fell from $3M in the plan year 2023 filing to $3M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 263693194 · Onsite Mammography, LLC PY 2024 · 401(k)

Onsite Mammography LLC 401(k) Plan · $14M · 449 · 62nd

  • SCH $14M
  • SCH 449
  • SCH 62nd
  • SCH 401(k)
  • SCH near Jillamy, Inc 401(k) Profit Sharing Plan
  • SCH ind #11428

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 Healthcare & Social Assistance retirement plans → · Plans in Massachusetts →

Onsite Mammography LLC 401(k) Plan in the asset neighbourhood

Onsite Mammography LLC 401(k) PlanOnsite Mammography LLC 401(k…$14MJillamy, Inc 401(k) Profit Sharing PlanJillamy, Inc 401(k) Profit S…$14MWisconsin Stamping & Manufacturing, LLC 401(k) Savings PlanWisconsin Stamping & Manufac…$14MAirflow Sciences Corporation 401(k) Profit Sharing Plan & TrustAirflow Sciences Corporation…$14MNeil Patel Digital 401(k) PlanNeil Patel Digital 401(k) Pl…$14M
End-of-year total assets ($M) among Onsite Mammography LLC 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Onsite Mammography, LLC multi-year asset trail

Sponsor-wide plan assets over time

All Onsite Mammography, LLC plans reported in each filing year

Latest sponsor-wide plan assets
$14M 72.65692220101006% vs 2022
2024 filing year
$6M$8M$10M$12M$14M$16M 202220232024 $7.89M $13.6M ▲ +72.6%
Year Plans Participants Total Assets
2022 1 325 $8M
2023 1 367 $11M
2024 1 449 $14M

Onsite Mammography, LLC filing trail (2024)

Total Assets (Beginning of Year)$11M
Net Assets (End of Year)$14M
Net Income$3M
Employer EIN263693194
Plan Effective Date2009-03-01
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Massachusetts

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

Onsite Mammography LLC 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Onsite Mammography LLC 401(k) Plan, Total assets ($B): 0.013619235 · Participants: 449Onsite Mammography LLC 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
Onsite Mammography LLC 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Onsite Mammography LLC 401(k) Plan side-by-side with 3 peers →

Onsite Mammography LLC 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Jillamy, Inc 401(k) Profit Sharing Plan in PA ($14M); by covered participants it is Mobile Management, LLC 401(k) Plan & Trust in NY (449 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (449 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 Onsite Mammography LLC 401(k) Plan assets move in 2024? ▼
Onsite Mammography LLC 401(k) Plan grew sharply - up 23.3% during 2024, from $11M to $14M. Reported net income was $3M.
How have Onsite Mammography, LLC plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Onsite Mammography, LLC's sponsor-wide assets grew 72.7%, from $8M to $14M.
Which 401(k) plans are similar in size to Onsite Mammography LLC 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Jillamy, Inc 401(k) Profit Sharing Plan in PA ($14M, 421 participants).
Which 401(k) plans cover a similar participant headcount to Onsite Mammography LLC 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Mobile Management, LLC 401(k) Plan & Trust in NY (449 participants, $18M 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 263693194.

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.