Other · DOL Form 5500 · 2023

Groton School Retirement Plan

Data updated 2026-07-24

$80M
Total assets
203
Participants
90th
Percentile by assets
$395,583
Avg per participant

Official DOL plan name: Groton School 403(b) Defined Contribution Retirement Plan · Sponsored by Groton School · Massachusetts · Educational Services

$80M in assets, 203 participants

Groton School's Groton School 403(b) Defined Contribution Retirement Plan reported $80M in total assets and 203 participants in its 2023 DOL Form 5500 filing, ranking in the 90th 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.

  • 90th percentile by assets (of 126,618 plans)

What the 2023 filing shows

Groton School 403(b) Defined Contribution Retirement Plan holds $80M for 203 participants - about $395,583 per participant, in the top 10% of all filed plans by assets, up 11.8% over the 2023 plan year.

$80M
total plan assets (2023 EOY)
203
covered participants
90th
percentile by assets (of 126,618 plans)
$395,583
avg assets per participant
Industry
Educational Services

Other · DOL Form 5500 · 2023

What the Filing Says About Groton School 403(b) Defined Contribution Retirement Plan

Groton School 403(b) Defined Contribution Retirement Plan is an Other retirement plan sponsored by Groton School, headquartered in Massachusetts. According to the U.S. Department of Labor's 2023 Form 5500 filing, the plan reports $80M in total end-of-year assets and covers 203 participants across the Educational Services industry. The sponsor's EIN on file with the U.S. Department of Labor is 042104265, and the plan has been effective since 1923-01-20. Its filing status is currently FILING RECEIVED.

Year over year, total assets grew at a solid clip from $72M at the beginning of 2023 to $80M at year-end - up 11.8%. Net assets (after liabilities) closed the year at $80M, with reported net income of $8M driven by investment returns, contributions received, and benefit payments during the period. These figures reflect what the plan administrator certified on Schedule H or Schedule I of the Form 5500 annual return and can be compared against 2 prior plan-year filings from the same sponsor shown below.

Across the 3 plan years Groton School has on file with PlainRetire (2022-2024), sponsor-wide plan assets have moved from $93M to $87M, a decline of 5.9%, while reported participants moved from 281 to 195 (-30.6%). The strongest year on file by total sponsor assets was 2023 at $103M; the softest was 2024 at $87M. Year-by-year, sponsor-wide filings show: 2022 - $93M in assets across 2 plans covering 281 participants; 2023 - $103M in assets across 2 plans covering 279 participants; 2024 - $87M in assets across 1 plan covering 195 participants.

By assets, Groton School 403(b) Defined Contribution Retirement Plan outranks 90% of the 126,618 plans that filed a Form 5500 for the 2023 plan year, and holds roughly 0.8x the national average plan size of $100M and 730 average participants.

Asset totals and participant counts reflect a single plan year snapshot and can change materially with market conditions, plan mergers, or workforce changes. Fields such as "net income" include both realized investment performance and contribution/distribution flows, a single-year figure does not by itself indicate plan health or participant outcomes. This page summarizes public DOL disclosures for research and educational purposes only and is not retirement, tax, legal, or financial advice. Before making decisions about your own retirement benefits or evaluating an employer's plan, verify the underlying filing directly via the DOL EFAST2 system and consult a qualified professional.

How the percentile is calculated: we count every plan that filed a 2023 Form 5500 with a reported end-of-year asset figure (126,618 plans), rank Groton School 403(b) Defined Contribution Retirement Plan against all of them by total assets, and report the share of those plans it outranks. A plan reporting no asset figure for the year is excluded from the ranking rather than assumed to be zero.

Financial Summary (2023)

Total Assets (Beginning of Year)$72M
Total Assets (End of Year)$80M
Net Assets (End of Year)$80M
Net Income$8M
Plan TypeOther
Employer EIN042104265
Plan Effective Date1923-01-20
Filing StatusFILING RECEIVED

Sponsor Plan History (Groton School)

$85M$90M$95M$100M$105M$110M 202220232024 $92.6M $87.1M ▼ -5.9%
Total plan assets by year, all Groton School 401(k) plans on file
Year Plans Participants Total Assets
2022 2 281 $93M
2023 2 279 $103M
2024 1 195 $87M

Nearby Other Plans in Massachusetts

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

Groton School 403(b) Defined Contribution Retirement Plan vs. nearby Other plans in Massachusetts, assets vs. participants

Groton School 403(b) Defined Contribution Retirement Plan vs. nearby Other plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -50000500010000150002000025000 -20246 Total assets ($B) Participants Groton School 403(b)…The Mitre Corporatio…Harvard University T…Boston University Re…Beth Israel Deacones…Northeastern Univers…
Groton School 403(b) Defined Contribution Retirement Plan vs. nearby Other plans in Massachusetts, assets vs. participants

Similar-Sized Other Plans Nationally

Other plans in other states closest to Groton School 403(b) Defined Contribution Retirement Plan by total assets, not by location.

Frequently Asked Questions

How much money is in the Groton School 403(b) Defined Contribution Retirement Plan?
As of the 2023 Form 5500 filing, Groton School 403(b) Defined Contribution Retirement Plan holds $80M in total assets with 203 participants. It is sponsored by Groton School.
What type of plan is Groton School 403(b) Defined Contribution Retirement Plan?
Groton School 403(b) Defined Contribution Retirement Plan is an Other plan. It has been effective since 1923-01-20. The plan is filed with the U.S. Department of Labor under EIN 042104265.
Who sponsors the Groton School 403(b) Defined Contribution Retirement Plan?
Groton School 403(b) Defined Contribution Retirement Plan is sponsored by Groton School, located in Massachusetts. The sponsor's EIN is 042104265 and the plan operates in the Educational Services industry.
How did Groton School 403(b) Defined Contribution Retirement Plan perform in 2023?
Groton School 403(b) Defined Contribution Retirement Plan grew at a solid clip - up 11.8% during 2023, moving from $72M to $80M in total assets. Net income was $8M.

What this filing means

Ways to act on Groton School 403(b) Defined Contribution Retirement Plan's numbers.

  • By total assets, Groton School 403(b) Defined Contribution Retirement Plan ranks in the top 10% of all filed plans by assets. See the largest plans
  • Compare it side-by-side against 3 similar Other plans in Massachusetts. Compare plans
  • Groton School's sponsor-wide assets have declined 5.9% since 2022 across 3 plan years on file. More Educational Services plans
  • An Other plan works differently from other retirement plan types, understand the structural differences before comparing. Compare plan types

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 042104265.

Reference: IRS Publication 560, Retirement Plans for Small Business, contribution-limit rules.

Reference: IRS Publication 590-B, Distributions from IRAs, RMD rules under SECURE Act 2.0.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.

Every figure on PlainRetire is rendered directly from the Department of Labor's Form 5500 annual return filings, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-07-24.