Other · DOL Form 5500 · 2024

St. Mark's School of Southborough, Inc. Retirement Plan

Data updated 2026-08-25

$55M
Total assets Below avg plan size
168
Participants Small participant base
85th
Percentile by assets National rank
$327,871
Avg per participant High balance/head
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Official DOL plan name: St. Mark's School Retirement Savings Plan · Sponsored by St. Mark's School of Southborough, Inc. · Massachusetts · Educational Services

$55M in assets, 168 participants

St. Mark's School of Southborough, Inc.'s St. Mark's School Retirement Savings Plan reported $55M in total assets and 168 participants in its 2024 DOL Form 5500 filing, ranking in the 85th 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.

  • #2,686 in Educational Services (3,638 peers)

Coverage in Massachusetts

St. Mark's School Retirement Savings Plan covers 168 participants in Massachusetts, about 26% of the average Massachusetts filer (state average ~659 per filing). Assets: $55M.

#2,686
in Educational Services (3,638 peers)
+6.5%
assets growth YoY
0.6×
vs typical plan assets (national mean)

St. Mark's School Retirement Savings Plan's outsized position by total assets

St. Mark's School Retirement Savings Plan vs every filed plan by assets

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

$55,082,288 Top 15% higher than 85% 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

St. Mark's School Retirement Savings 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. St. Mark's School Retirement Savings Plan sits mid-pack in the medium band (168 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • St. Mark's School Retirement Savings Plan reported net income fell from $7M in the plan year 2023 filing to $3M in the plan year 2024 filing.
  • St. Mark's School Retirement Savings Plan end-of-year assets rose from $52M in the plan year 2023 filing to $55M in the plan year 2024 filing.
  • St. Mark's School Retirement Savings Plan reported participants rose from 162 in the plan year 2023 filing to 168 in the plan year 2024 filing.

See the national 2023→2024 release diff →

DOL schedule card

Filing strip 042103623 · St. Mark's School of Southborough, Inc. PY 2024 · Other

St. Mark's School Retirement Savings Plan · $55M · 168 · 85th

  • 5500 $55M
  • ASSETS 168
  • PCT 85th
  • EIN Other
  • RANK near American Association for Cancer Research 403(b) Plan
  • PHOTO ind #2686

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 Educational Services retirement plans → · Plans in Massachusetts →

St. Mark's School Retirement Savings Plan in the asset neighbourhood

Rehabilitation Hospital of the Pacific 403b Retirement Savings PlanRehabilitation Hospital of t…$55MField Museum of Natural History 403(b) PlanField Museum of Natural Hist…$55MMoody Bible Institute Retirement PlanMoody Bible Institute Retire…$55MAmerican Association for Cancer Research 403(b) PlanAmerican Association for Can…$55MSt. Mark's School Retirement Savings PlanSt. Mark's School Retirement…$55M
End-of-year total assets ($M) among St. Mark's School Retirement Savings Plan and nearest nationwide Other peers. Source: DOL Form 5500 plan year 2024.

Massachusetts filing particulars

Total Assets (Beginning of Year)$52M
Net Assets (End of Year)$55M
Net Income$3M
Employer EIN042103623
Plan Effective Date1927-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (St. Mark's School of Southborough, Inc.)

Sponsor-wide plan assets over time

All St. Mark's School of Southborough, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$55M 23.396589753848815% vs 2022
2024 filing year
$40M$45M$50M$55M$60M 202220232024 $44.6M $55.1M ▲ +23.4%
Year Plans Participants Total Assets
2022 1 148 $45M
2023 1 162 $52M
2024 1 168 $55M

Nearby Other Plans in Massachusetts

Peer Other plans, same state, same plan type, ranked by total assets.

St. Mark's School Retirement Savings Plan vs. nearby Other plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -10000010000200003000040000 -1012345 Total assets ($B) Participants St. Mark's School Retirement Savings Plan, Total assets ($B): 0.055082288 · Participants: 168St. Mark's School Retirement Savings PlanHarvard University Tax Deferred Annuity Plan, Total assets ($B): 4.299350229 · Participants: 24395Harvard University Tax Deferred Annuity PlanBeth Israel Lahey 403(b) Retirement Savings Plan, Total assets ($B): 3.507933231 · Participants: 33591Beth Israel Lahey 403(b) Retirement Savings PlanBoston University Retirement Plan, Total assets ($B): 2.976139 · Participants: 8173Boston University Retirement PlanNortheastern University Retirement Plan, Total assets ($B): 2.641546036 · Participants: 8900Northeastern University Retirement PlanBoston University Supplemental Retirement and Savings Plan, Total assets ($B): 1.735973854 · Participants: 12869Boston University Supplemental Retirement and Savings Plan
St. Mark's School Retirement Savings Plan vs. nearby Other plans in Massachusetts, assets vs. participants

St. Mark's School Retirement Savings Plan's out-of-state Other peers by assets and headcount

Outside Massachusetts, the nearest Other by assets is American Association for Cancer Research 403(b) Plan in PA ($55M); by covered participants it is Pomfret School 403(b) Retirement Plan in CT (168 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (168 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 St. Mark's School Retirement Savings Plan assets move in 2024?
St. Mark's School Retirement Savings Plan grew at a solid clip - up 6.5% during 2024, from $52M to $55M. Reported net income was $3M.
How have St. Mark's School of Southborough, Inc. plan assets changed over time?
Across 3 plan years on file (2022-2024), St. Mark's School of Southborough, Inc.'s sponsor-wide assets grew 23.4%, from $45M to $55M.
Where does St. Mark's School Retirement Savings Plan rank by assets among Form 5500 filers?
St. Mark's School Retirement Savings Plan ranks in the 85th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top quartile of all filed plans by assets).
Which Other plans are similar in size to St. Mark's School Retirement Savings Plan?
Among Other plans in other states, the closest by assets is American Association for Cancer Research 403(b) Plan in PA ($55M, 231 participants).
Which Other plans cover a similar participant headcount to St. Mark's School Retirement Savings Plan?
Among Other plans in other states, the closest by covered participants is Pomfret School 403(b) Retirement Plan in CT (168 participants, $48M in assets).