Other · DOL Form 5500 · 2022
Mount Auburn Hospital Retirement Plan
Data updated 2026-07-24
- $505M
- Total assets
- 2,146
- Participants
- 98th
- Percentile by assets
- $235,098
- Avg per participant
Official DOL plan name: The Retirementplus Retirement Plan for Employees of Mount Auburn · Sponsored by Mount Auburn Hospital · Massachusetts · Healthcare & Social Assistance
$505M in assets, 2,146 participants
Mount Auburn Hospital's The Retirementplus Retirement Plan for Employees of Mount Auburn reported $505M in total assets and 2,146 participants in its 2022 DOL Form 5500 filing, ranking in the 98th 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.
- 98th percentile by assets (of 139,258 plans)
What the 2022 filing shows
The Retirementplus Retirement Plan for Employees of Mount Auburn holds $505M for 2,146 participants - about $235,098 per participant, in the top 5% of all filed plans by assets, up 9.9% over the 2022 plan year.
- $505M
- total plan assets (2022 EOY)
- 2,146
- covered participants
- 98th
- percentile by assets (of 139,258 plans)
- $235,098
- avg assets per participant
Other · DOL Form 5500 · 2022
What the Filing Says About The Retirementplus Retirement Plan for Employees of Mount Auburn
The Retirementplus Retirement Plan for Employees of Mount Auburn is an Other retirement plan sponsored by Mount Auburn Hospital, headquartered in Massachusetts. According to the U.S. Department of Labor's 2022 Form 5500 filing, the plan reports $505M in total end-of-year assets and covers 2,146 participants across the Healthcare & Social Assistance industry. The sponsor's EIN on file with the U.S. Department of Labor is 042103606, and the plan has been effective since 1990-01-01. Its filing status is currently FILING RECEIVED.
Year over year, total assets grew at a solid clip from $459M at the beginning of 2022 to $505M at year-end - up 9.9%. Net assets (after liabilities) closed the year at $505M, with reported net income of $46M 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 Mount Auburn Hospital has on file with PlainRetire (2022-2024), sponsor-wide plan assets have no comparable total-assets figures across every year, while reported participants moved from 2,146 to 2,762 (+28.7%). The strongest year on file by total sponsor assets was 2023 at $588M; the softest was 2024 at N/A. Year-by-year, sponsor-wide filings show: 2022 - $505M in assets across 1 plan covering 2,146 participants; 2023 - $588M in assets across 1 plan covering 2,781 participants; 2024 - N/A in assets across 1 plan covering 2,762 participants.
By assets, The Retirementplus Retirement Plan for Employees of Mount Auburn outranks 98% of the 139,258 plans that filed a Form 5500 for the 2022 plan year, and holds roughly 5.0x 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 2022 Form 5500 with a reported end-of-year asset figure (139,258 plans), rank The Retirementplus Retirement Plan for Employees of Mount Auburn 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 (2022)
| Total Assets (Beginning of Year) | $459M |
|---|---|
| Total Assets (End of Year) | $505M |
| Net Assets (End of Year) | $505M |
| Net Income | $46M |
| Plan Type | Other |
| Employer EIN | 042103606 |
| Plan Effective Date | 1990-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Mount Auburn Hospital)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 2,146 | $505M |
| 2023 | 1 | 2,781 | $588M |
| 2024 | 1 | 2,762 | N/A |
Nearby Other Plans in Massachusetts
Peer Other plans, same state, same plan type, ranked by total assets.
The Retirementplus Retirement Plan for Employees of Mount Auburn vs. nearby Other plans in Massachusetts, assets vs. participants
- The Mitre Corporation Tax Sheltered Annuity Plan $4.1B · 12,320
- Harvard University Tax Deferred Annuity Plan $3.2B · 21,269
- Boston University Retirement Plan $2.5B · 8,045
- Northeastern University Retirement Plan $1.9B · 9,310
- Boston University Supplemental Retirement and Savings Plan $1.3B · 12,377
Similar-Sized Other Plans Nationally
Other plans in other states closest to The Retirementplus Retirement Plan for Employees of Mount Auburn by total assets, not by location.
- St. Luke's Health Network 403(b) Plan (PA) $503M · 17,079
- Illinois Institute of Technology Tax Deferred Annuity Plan (IL) $506M · 1,049
- The Catholic University of America Retirement Plan (DC) $500M · 1,751
- Pepperdine University Retirement Plan (CA) $509M · 1,845
Frequently Asked Questions
How much money is in the The Retirementplus Retirement Plan for Employees of Mount Auburn? ▼
What type of plan is The Retirementplus Retirement Plan for Employees of Mount Auburn? ▼
Who sponsors the The Retirementplus Retirement Plan for Employees of Mount Auburn? ▼
How did The Retirementplus Retirement Plan for Employees of Mount Auburn perform in 2022? ▼
What this filing means
Ways to act on The Retirementplus Retirement Plan for Employees of Mount Auburn's numbers.
- By total assets, The Retirementplus Retirement Plan for Employees of Mount Auburn ranks in the top 5% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar Other plans in Massachusetts. Compare 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 2022.
Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 042103606.
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.
Read our methodology - how this data is sourced, computed, and verified.
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.