401(k) · DOL Form 5500 · 2023

Mph Boston South Corp. 401(k) Plan

Data updated 2026-08-25

$375K
Total assets Small plan by assets
4
Participants Small participant base
15th
Percentile by assets National rank
$93,689
Avg per participant Below avg balance/head
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Official DOL plan name: Mph Boston South Corp. 401(k) Plan · Sponsored by Mph Boston South Corp. · Massachusetts · Administrative & Support Services

$375K in assets, 4 participants

Mph Boston South Corp.'s Mph Boston South Corp. 401(k) Plan reported $375K in total assets and 4 participants in its 2023 DOL Form 5500 filing, ranking in the 15th 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.

  • #1,500 in Administrative & Support Services (4,372 peers)

Mph Boston South Corp. multi-year trail

Mph Boston South Corp.'s plans moved -74.4% in assets from 2022 to 2024; this filing shows Mph Boston South Corp. 401(k) Plan at $375K / 4 participants.

#1,500
in Administrative & Support Services (4,372 peers)
-65.4%
assets change YoY

The plan reported a net loss of $710K for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

Mph Boston South Corp. 401(k) Plan among the smaller filed plans by assets

Mph Boston South Corp. 401(k) Plan vs every filed plan by assets

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

$374,757 15th percentile higher than 15% 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

Mph Boston South Corp. 401(k) Plan among micro filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mph Boston South Corp. 401(k) Plan is a micro filing (4 participants), the leftmost band.

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Mph Boston South Corp. 401(k) Plan reported net income fell from $69K in the plan year 2022 filing to -$710K in the plan year 2023 filing.
  • Mph Boston South Corp. 401(k) Plan reported participants rose from 1 in the plan year 2022 filing to 4 in the plan year 2023 filing.
  • Mph Boston South Corp. 401(k) Plan end-of-year assets fell from $1M in the plan year 2022 filing to $375K in the plan year 2023 filing.

See the national 2022→2023 release diff →

DOL schedule card

Filing strip 851154189 · Mph Boston South Corp. PY 2023 · 401(k)

Mph Boston South Corp. 401(k) Plan · $375K · 4 · 15th

  • 5500 $375K
  • ASSETS 4
  • PCT 15th
  • EIN 401(k)
  • RANK near Ndeon Corporation Retirement Plan
  • PHOTO ind #1500

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 →

Mph Boston South Corp. 401(k) Plan in the asset neighbourhood

Mph Boston South Corp. 401(k) PlanMph Boston South Corp. 401(k…$375KNdeon Corporation Retirement PlanNdeon Corporation Retirement…$375KElem Corp. 401(k) Plan$375KHealth Scope Inc. 401(k) Plan$375KKaplan Woods Care Home, Inc. 401(k) PlanKaplan Woods Care Home, Inc.…$375K
End-of-year total assets ($M) among Mph Boston South Corp. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Mph Boston South Corp. multi-year asset trail

Sponsor-wide plan assets over time

All Mph Boston South Corp. plans reported in each filing year

Latest sponsor-wide plan assets
$278K 74.39940099164653% vs 2022
2024 filing year
$0M$0.5M$1M$1.5M 202220232024 $1.08M $0.28M ▼ -74.1%
Year Plans Participants Total Assets
2022 1 1 $1M
2023 1 4 $375K
2024 1 14 $278K

Mph Boston South Corp. filing trail (2023)

Total Assets (Beginning of Year)$1M
Net Assets (End of Year)$375K
Net Income-$710K
Employer EIN851154189
Plan Effective Date2020-05-22
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Massachusetts

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

Mph Boston South Corp. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Mph Boston South Corp. 401(k) Plan, Total assets ($B): 0.000374757 · Participants: 4Mph Boston South Corp. 401(k) 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
Mph Boston South Corp. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Mph Boston South Corp. 401(k) Plan side-by-side with 3 peers →

Mph Boston South Corp. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Ndeon Corporation Retirement Plan in MN ($375K); by covered participants it is Makingchg, Inc. Retirement Plan in TN (4 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($375K here).

Similar participant headcount

Nearest other-state filings by covered participants (4 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 Mph Boston South Corp. 401(k) Plan assets move in 2023? ▼
Mph Boston South Corp. 401(k) Plan contracted severely - down 65.4% during 2023, from $1M to $375K. Reported net income was -$710K.
How have Mph Boston South Corp. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mph Boston South Corp.'s sponsor-wide assets declined 74.4%, from $1M to $278K.
Where does Mph Boston South Corp. 401(k) Plan rank by assets among Form 5500 filers? ▼
Mph Boston South Corp. 401(k) Plan ranks in the 15th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (among the smaller plans by assets on file).
Which 401(k) plans are similar in size to Mph Boston South Corp. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Ndeon Corporation Retirement Plan in MN ($375K, 2 participants).
Which 401(k) plans cover a similar participant headcount to Mph Boston South Corp. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Makingchg, Inc. Retirement Plan in TN (4 participants, N/A 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 851154189.

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.